ffmpeg.c

static void check_audio_video_inputs(int *has_video_ptr, int *has_audio_ptr)
{
    int has_video, has_audio, i, j;
    AVFormatContext *ic;

    has_video = 0;
    has_audio = 0;
    for(j=0;j<nb_input_files;j++) {
        ic = input_files[j];
        for(i=0;i<ic->nb_streams;i++) {
            AVCodecContext *enc = &ic->streams[i]->codec;
            switch(enc->codec_type) {
            case CODEC_TYPE_AUDIO:
                has_audio = 1;
                break;
            case CODEC_TYPE_VIDEO:
                has_video = 1;
                break;
            case CODEC_TYPE_DATA:
                break;
            default:
                av_abort();
            }
        }
    }
    *has_video_ptr = has_video;
    *has_audio_ptr = has_audio;
}

static void opt_output_file(const char *filename)
{
    AVStream *st;
    AVFormatContext *oc;
    int use_video, use_audio, nb_streams, input_has_video, input_has_audio;
    int codec_id;
    AVFormatParameters params, *ap = &params;

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    oc = av_alloc_format_context();

    if (!file_oformat) {
        file_oformat = guess_format(NULL, filename, NULL);
        if (!file_oformat) {
            fprintf(stderr, "Unable for find a suitable output format for '%s'\n",
                    filename);
            exit(1);
        }
    }
    
    oc->oformat = file_oformat;

    if (!strcmp(file_oformat->name, "ffm") && 
        strstart(filename, "http:", NULL)) {
        /* special case for files sent to ffserver: we get the stream
           parameters from ffserver */
        if (read_ffserver_streams(oc, filename) < 0) {
            fprintf(stderr, "Could not read stream parameters from '%s'\n", filename);
            exit(1);
        }
    } else {
        use_video = file_oformat->video_codec != CODEC_ID_NONE || video_stream_copy;
        use_audio = file_oformat->audio_codec != CODEC_ID_NONE || audio_stream_copy;

        /* disable if no corresponding type found and at least one
           input file */
        if (nb_input_files > 0) {
            check_audio_video_inputs(&input_has_video, &input_has_audio);
            if (!input_has_video)
                use_video = 0;
            if (!input_has_audio)
                use_audio = 0;
        }

        /* manual disable */
        if (audio_disable) {
            use_audio = 0;
        }
        if (video_disable) {
            use_video = 0;
        }
        
        nb_streams = 0;
        if (use_video) {
            AVCodecContext *video_enc;
            
            st = av_new_stream(oc, nb_streams++);
            if (!st) {
                fprintf(stderr, "Could not alloc stream\n");
                exit(1);
            }
#if defined(HAVE_THREADS)
            if(thread_count>1)
                avcodec_thread_init(&st->codec, thread_count);
#endif

            video_enc = &st->codec;
            
            if(video_codec_tag)
                video_enc->codec_tag= video_codec_tag;
                
            if (file_oformat->flags & AVFMT_GLOBALHEADER) 
                video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
            if (video_stream_copy) {
                st->stream_copy = 1;
                video_enc->codec_type = CODEC_TYPE_VIDEO;
            } else {
                char *p;
                int i;
                AVCodec *codec;
            
                codec_id = av_guess_codec(file_oformat, NULL, filename, NULL, CODEC_TYPE_VIDEO);
                if (video_codec_id != CODEC_ID_NONE)
                    codec_id = video_codec_id;
                
                video_enc->codec_id = codec_id;
                codec = avcodec_find_encoder(codec_id);
                
                video_enc->bit_rate = video_bit_rate;
                video_enc->bit_rate_tolerance = video_bit_rate_tolerance;
                video_enc->time_base.den = frame_rate; 
                video_enc->time_base.num = frame_rate_base; 
                if(codec && codec->supported_framerates){
                    const AVRational *p= codec->supported_framerates;
                    AVRational req= (AVRational){frame_rate, frame_rate_base};
                    const AVRational *best=NULL;
                    AVRational best_error= (AVRational){INT_MAX, 1};
                    for(; p->den!=0; p++){
                        AVRational error= av_sub_q(req, *p);
                        if(error.num <0) error.num *= -1;
                        if(av_cmp_q(error, best_error) < 0){
                            best_error= error;
                            best= p;
                        }
                    }
                    video_enc->time_base.den= best->num;
                    video_enc->time_base.num= best->den;
                }
                
                video_enc->width = frame_width + frame_padright + frame_padleft;
                video_enc->height = frame_height + frame_padtop + frame_padbottom;
		video_enc->sample_aspect_ratio = av_d2q(frame_aspect_ratio*frame_height/frame_width, 255);
                video_enc->pix_fmt = frame_pix_fmt;

                if(codec && codec->pix_fmts){
                    const enum PixelFormat *p= codec->pix_fmts;
                    for(; *p!=-1; p++){
                        if(*p == video_enc->pix_fmt)
                            break;
                    }
                    if(*p == -1)
                        video_enc->pix_fmt = codec->pix_fmts[0];
                }

                if (!intra_only)
                    video_enc->gop_size = gop_size;
                else
                    video_enc->gop_size = 0;
                if (video_qscale || same_quality) {
                    video_enc->flags |= CODEC_FLAG_QSCALE;
                    video_enc->global_quality= 
                    st->quality = FF_QP2LAMBDA * video_qscale;
                }

                if(intra_matrix)
                    video_enc->intra_matrix = intra_matrix;
                if(inter_matrix)
                    video_enc->inter_matrix = inter_matrix;

                if(bitexact)
                    video_enc->flags |= CODEC_FLAG_BITEXACT;

                video_enc->mb_decision = mb_decision;
                video_enc->mb_cmp = mb_cmp;
                video_enc->ildct_cmp = ildct_cmp;
                video_enc->me_sub_cmp = sub_cmp;
                video_enc->me_cmp = cmp;
                video_enc->me_pre_cmp = pre_cmp;
                video_enc->pre_me = pre_me;
                video_enc->lumi_masking = lumi_mask;
                video_enc->dark_masking = dark_mask;
                video_enc->spatial_cplx_masking = scplx_mask;
                video_enc->temporal_cplx_masking = tcplx_mask;
                video_enc->p_masking = p_mask;
                video_enc->quantizer_noise_shaping= qns;
                
                if (use_umv) {
                    video_enc->flags |= CODEC_FLAG_H263P_UMV;
                }
                if (use_ss) {
                    video_enc->flags |= CODEC_FLAG_H263P_SLICE_STRUCT;
                }
           	if (use_aic) {
                    video_enc->flags |= CODEC_FLAG_H263P_AIC;
                }
           	if (use_aiv) {
                    video_enc->flags |= CODEC_FLAG_H263P_AIV;
                }
                if (use_4mv) {
                    video_enc->flags |= CODEC_FLAG_4MV;
                }
                if (use_obmc) {
                    video_enc->flags |= CODEC_FLAG_OBMC;
                }
                if (use_loop) {
                    video_enc->flags |= CODEC_FLAG_LOOP_FILTER;
                }
            
                if(use_part) {
                    video_enc->flags |= CODEC_FLAG_PART;
                }
           	if (use_alt_scan) {
                    video_enc->flags |= CODEC_FLAG_ALT_SCAN;
                }
           	if (use_trell) {
                    video_enc->flags |= CODEC_FLAG_TRELLIS_QUANT;
                }
                   if (use_mv0) {
                    video_enc->flags |= CODEC_FLAG_MV0;
                }
                   if (do_normalize_aqp) {
                    video_enc->flags |= CODEC_FLAG_NORMALIZE_AQP;
                }
           	if (use_scan_offset) {
                    video_enc->flags |= CODEC_FLAG_SVCD_SCAN_OFFSET;
                }
           	if (closed_gop) {
                    video_enc->flags |= CODEC_FLAG_CLOSED_GOP;
                }
                if (strict_gop) {
                    video_enc->flags2 |= CODEC_FLAG2_STRICT_GOP;
                }
           	if (use_qpel) {
                    video_enc->flags |= CODEC_FLAG_QPEL;
                }
           	if (use_qprd) {
                    video_enc->flags |= CODEC_FLAG_QP_RD;
                }
           	if (use_cbprd) {
                    video_enc->flags |= CODEC_FLAG_CBP_RD;
                }
                if (b_frames) {
                    video_enc->max_b_frames = b_frames;
                    video_enc->b_frame_strategy = b_strategy;
                    video_enc->b_quant_factor = 2.0;
                }
                if (do_interlace_dct) {
                    video_enc->flags |= CODEC_FLAG_INTERLACED_DCT;
                }
                if (do_interlace_me) {
                    video_enc->flags |= CODEC_FLAG_INTERLACED_ME;
                }
                if (no_output) {
                    video_enc->flags2 |= CODEC_FLAG2_NO_OUTPUT;
                }
                video_enc->qmin = video_qmin;
                video_enc->qmax = video_qmax;
                video_enc->lmin = video_lmin;
                video_enc->lmax = video_lmax;
                video_enc->rc_qsquish = video_qsquish;
                video_enc->luma_elim_threshold = video_lelim;
                video_enc->chroma_elim_threshold = video_celim;
                video_enc->mb_lmin = video_mb_lmin;
                video_enc->mb_lmax = video_mb_lmax;
                video_enc->max_qdiff = video_qdiff;
                video_enc->qblur = video_qblur;
                video_enc->qcompress = video_qcomp;
                video_enc->rc_eq = video_rc_eq;
                video_enc->debug = debug;
                video_enc->debug_mv = debug_mv;
                video_enc->workaround_bugs = workaround_bugs;
                video_enc->thread_count = thread_count;
                p= video_rc_override_string;
                for(i=0; p; i++){
                    int start, end, q;
                    int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
                    if(e!=3){
                        fprintf(stderr, "error parsing rc_override\n");
                        exit(1);
                    }
                    video_enc->rc_override= 
                        av_realloc(video_enc->rc_override, 
                                   sizeof(RcOverride)*(i+1));
                    video_enc->rc_override[i].start_frame= start;
                    video_enc->rc_override[i].end_frame  = end;
                    if(q>0){
                        video_enc->rc_override[i].qscale= q;
                        video_enc->rc_override[i].quality_factor= 1.0;
                    }
                    else{
                        video_enc->rc_override[i].qscale= 0;
                        video_enc->rc_override[i].quality_factor= -q/100.0;
                    }
                    p= strchr(p, '/');
                    if(p) p++;
                }
                video_enc->rc_override_count=i;

                video_enc->rc_max_rate = video_rc_max_rate;
                video_enc->rc_min_rate = video_rc_min_rate;
                video_enc->rc_buffer_size = video_rc_buffer_size;
                video_enc->rc_initial_buffer_occupancy = video_rc_buffer_size*3/4;
                video_enc->rc_buffer_aggressivity= video_rc_buffer_aggressivity;
                video_enc->rc_initial_cplx= video_rc_initial_cplx;
                video_enc->i_quant_factor = video_i_qfactor;
                video_enc->b_quant_factor = video_b_qfactor;
                video_enc->i_quant_offset = video_i_qoffset;
                video_enc->b_quant_offset = video_b_qoffset;
                video_enc->intra_quant_bias = video_intra_quant_bias;
                video_enc->inter_quant_bias = video_inter_quant_bias;
                video_enc->dct_algo = dct_algo;
                video_enc->idct_algo = idct_algo;
                video_enc->me_threshold= me_threshold;
                video_enc->mb_threshold= mb_threshold;
                video_enc->intra_dc_precision= intra_dc_precision - 8;
                video_enc->strict_std_compliance = strict;
                video_enc->error_rate = error_rate;
                video_enc->noise_reduction= noise_reduction;
                video_enc->scenechange_threshold= sc_threshold;
                video_enc->me_range = me_range;
                video_enc->coder_type= coder;
                video_enc->context_model= context;
                video_enc->prediction_method= predictor;
                video_enc->profile= video_profile;
                video_enc->level= video_level;
                video_enc->nsse_weight= nsse_weight;
                video_enc->me_subpel_quality= subpel_quality;
                video_enc->me_penalty_compensation= me_penalty_compensation;
                video_enc->frame_skip_threshold= frame_skip_threshold;
                video_enc->frame_skip_factor= frame_skip_factor;
                video_enc->frame_skip_exp= frame_skip_exp;
                video_enc->frame_skip_cmp= frame_skip_cmp;

                if(packet_size){
                    video_enc->rtp_mode= 1;
                    video_enc->rtp_payload_size= packet_size;
                }
            
                if (do_psnr)
                    video_enc->flags|= CODEC_FLAG_PSNR;
            
                video_enc->me_method = me_method;

                /* two pass mode */
                if (do_pass) {
                    if (do_pass == 1) {
                        video_enc->flags |= CODEC_FLAG_PASS1;
                    } else {
                        video_enc->flags |= CODEC_FLAG_PASS2;
                    }
                }
            }
        }
    
        if (use_audio) {
            AVCodecContext *audio_enc;

            st = av_new_stream(oc, nb_streams++);
            if (!st) {
                fprintf(stderr, "Could not alloc stream\n");
                exit(1);
            }
#if defined(HAVE_THREADS)
            if(thread_count>1)
                avcodec_thread_init(&st->codec, thread_count);
#endif

            audio_enc = &st->codec;
            audio_enc->codec_type = CODEC_TYPE_AUDIO;

            if(audio_codec_tag)
                audio_enc->codec_tag= audio_codec_tag;

            if (file_oformat->flags & AVFMT_GLOBALHEADER) 
                audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
            if (audio_stream_copy) {
                st->stream_copy = 1;
		audio_enc->channels = audio_channels;
            } else {
                codec_id = av_guess_codec(file_oformat, NULL, filename, NULL, CODEC_TYPE_AUDIO);
                if (audio_codec_id != CODEC_ID_NONE)
                    codec_id = audio_codec_id;
                audio_enc->codec_id = codec_id;
                
                audio_enc->bit_rate = audio_bit_rate;
                audio_enc->strict_std_compliance = strict;
                audio_enc->thread_count = thread_count;
                /* For audio codecs other than AC3 or DTS we limit */
                /* the number of coded channels to stereo   */
                if (audio_channels > 2 && codec_id != CODEC_ID_AC3
                    && codec_id != CODEC_ID_DTS) {
                    audio_enc->channels = 2;
                } else
                    audio_enc->channels = audio_channels;
            }
	    audio_enc->sample_rate = audio_sample_rate;
        }

        oc->nb_streams = nb_streams;

        if (!nb_streams) {
            fprintf(stderr, "No audio or video streams available\n");
            exit(1);
        }

        oc->timestamp = rec_timestamp;
	    
	if (str_title)
            pstrcpy(oc->title, sizeof(oc->title), str_title);
        if (str_author)
            pstrcpy(oc->author, sizeof(oc->author), str_author);
        if (str_copyright)
            pstrcpy(oc->copyright, sizeof(oc->copyright), str_copyright);
        if (str_comment)
            pstrcpy(oc->comment, sizeof(oc->comment), str_comment);
    }

    output_files[nb_output_files++] = oc;

    pstrcpy(oc->filename, sizeof(oc->filename), filename);

    /* check filename in case of an image number is expected */
    if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
        if (filename_number_test(oc->filename) < 0) {
            print_error(oc->filename, AVERROR_NUMEXPECTED);
            exit(1);
        }
    }

    if (!(oc->oformat->flags & AVFMT_NOFILE)) {
        /* test if it already exists to avoid loosing precious files */
        if (!file_overwrite && 
            (strchr(filename, ':') == NULL ||
             strstart(filename, "file:", NULL))) {
            if (url_exist(filename)) {
                int c;
                
                if ( !using_stdin ) {
                    fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
                    fflush(stderr);
                    c = getchar();
                    if (toupper(c) != 'Y') {
                        fprintf(stderr, "Not overwriting - exiting\n");
                        exit(1);
                    }
				}
				else {
                    fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
                    exit(1);
				}
            }
        }
        
        /* open the file */
        if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
            fprintf(stderr, "Could not open '%s'\n", filename);
            exit(1);
        }
    }

    memset(ap, 0, sizeof(*ap));
    ap->image_format = image_format;
    if (av_set_parameters(oc, ap) < 0) {
        fprintf(stderr, "%s: Invalid encoding parameters\n",
                oc->filename);
        exit(1);
    }

    oc->packet_size= mux_packet_size;
    oc->mux_rate= mux_rate;
    oc->preload= (int)(mux_preload*AV_TIME_BASE);
    oc->max_delay= (int)(mux_max_delay*AV_TIME_BASE);

    /* reset some options */
    file_oformat = NULL;
    file_iformat = NULL;
    image_format = NULL;
    audio_disable = 0;
    video_disable = 0;
    audio_codec_id = CODEC_ID_NONE;
    video_codec_id = CODEC_ID_NONE;
    audio_stream_copy = 0;
    video_stream_copy = 0;
}

/* prepare dummy protocols for grab */
static void prepare_grab(void)
{
    int has_video, has_audio, i, j;
    AVFormatContext *oc;
    AVFormatContext *ic;
    AVFormatParameters vp1, *vp = &vp1;
    AVFormatParameters ap1, *ap = &ap1;
    
    /* see if audio/video inputs are needed */
    has_video = 0;
    has_audio = 0;
    memset(ap, 0, sizeof(*ap));
    memset(vp, 0, sizeof(*vp));
    vp->time_base.num= 1;
    for(j=0;j<nb_output_files;j++) {
        oc = output_files[j];
        for(i=0;i<oc->nb_streams;i++) {
            AVCodecContext *enc = &oc->streams[i]->codec;
            switch(enc->codec_type) {
            case CODEC_TYPE_AUDIO:
                if (enc->sample_rate > ap->sample_rate)
                    ap->sample_rate = enc->sample_rate;
                if (enc->channels > ap->channels)
                    ap->channels = enc->channels;
                has_audio = 1;
                break;
            case CODEC_TYPE_VIDEO:
                if (enc->width > vp->width)
                    vp->width = enc->width;
                if (enc->height > vp->height)
                    vp->height = enc->height;
                
                if (vp->time_base.num*(int64_t)enc->time_base.den > enc->time_base.num*(int64_t)vp->time_base.den){
                    vp->time_base = enc->time_base;
                }
                has_video = 1;
                break;
            default:
                av_abort();
            }
        }
    }
    
    if (has_video == 0 && has_audio == 0) {
        fprintf(stderr, "Output file must have at least one audio or video stream\n");
        exit(1);
    }
    
    if (has_video) {
        AVInputFormat *fmt1;
        fmt1 = av_find_input_format(video_grab_format);
        vp->device  = video_device;
        vp->channel = video_channel;
	vp->standard = video_standard;
        if (av_open_input_file(&ic, "", fmt1, 0, vp) < 0) {
            fprintf(stderr, "Could not find video grab device\n");
            exit(1);
        }
        /* If not enough info to get the stream parameters, we decode the
           first frames to get it. */
	if ((ic->ctx_flags & AVFMTCTX_NOHEADER) && av_find_stream_info(ic) < 0) {
            fprintf(stderr, "Could not find video grab parameters\n");
            exit(1);
        }
        /* by now video grab has one stream */
        ic->streams[0]->r_frame_rate.num = vp->time_base.den;
        ic->streams[0]->r_frame_rate.den = vp->time_base.num;
        input_files[nb_input_files] = ic;

        if (verbose >= 0)
            dump_format(ic, nb_input_files, "", 0);

        nb_input_files++;
    }
    if (has_audio && audio_grab_format) {
        AVInputFormat *fmt1;
        fmt1 = av_find_input_format(audio_grab_format);
        ap->device = audio_device;
        if (av_open_input_file(&ic, "", fmt1, 0, ap) < 0) {
            fprintf(stderr, "Could not find audio grab device\n");
            exit(1);
        }
        input_files[nb_input_files] = ic;

        if (verbose >= 0)
            dump_format(ic, nb_input_files, "", 0);

        nb_input_files++;
    }
}

/* same option as mencoder */
static void opt_pass(const char *pass_str)
{
    int pass;
    pass = atoi(pass_str);
    if (pass != 1 && pass != 2) {
        fprintf(stderr, "pass number can be only 1 or 2\n");
        exit(1);
    }
    do_pass = pass;
}

#if defined(CONFIG_WIN32) || defined(CONFIG_OS2)
static int64_t getutime(void)
{
  return av_gettime();
}
#else
static int64_t getutime(void)
{
    struct rusage rusage;

    getrusage(RUSAGE_SELF, &rusage);
    return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
}
#endif

extern int ffm_nopts;

static void opt_bitexact(void)
{
    bitexact=1;
    /* disable generate of real time pts in ffm (need to be supressed anyway) */
    ffm_nopts = 1;
}

static void show_formats(void)
{
    AVInputFormat *ifmt;
    AVOutputFormat *ofmt;
    AVImageFormat *image_fmt;
    URLProtocol *up;
    AVCodec *p, *p2;
    const char **pp, *last_name;

    printf("File formats:\n");
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        const char *name=NULL;
        const char *long_name=NULL;

        for(ofmt = first_oformat; ofmt != NULL; ofmt = ofmt->next) {
            if((name == NULL || strcmp(ofmt->name, name)<0) &&
                strcmp(ofmt->name, last_name)>0){
                name= ofmt->name;
                long_name= ofmt->long_name;
                encode=1;
            }
        }
        for(ifmt = first_iformat; ifmt != NULL; ifmt = ifmt->next) {
            if((name == NULL || strcmp(ifmt->name, name)<0) &&
                strcmp(ifmt->name, last_name)>0){
                name= ifmt->name;
                long_name= ifmt->long_name;
                encode=0;
            }
            if(name && strcmp(ifmt->name, name)==0)
                decode=1;
        }
        if(name==NULL)
            break;
        last_name= name;
        
        printf(
            " %s%s %-15s %s\n", 
            decode ? "D":" ", 
            encode ? "E":" ", 
            name,
            long_name ? long_name:" ");
    }
    printf("\n");

    printf("Image formats (filename extensions, if any, follow):\n");
    for(image_fmt = first_image_format; image_fmt != NULL; 
        image_fmt = image_fmt->next) {
        printf(
            " %s%s %-6s %s\n",
            image_fmt->img_read  ? "D":" ",
            image_fmt->img_write ? "E":" ",
            image_fmt->name,
            image_fmt->extensions ? image_fmt->extensions:" ");
    }
    printf("\n");

    printf("Codecs:\n");
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        int cap=0;

        p2=NULL;
        for(p = first_avcodec; p != NULL; p = p->next) {
            if((p2==NULL || strcmp(p->name, p2->name)<0) &&
                strcmp(p->name, last_name)>0){
                p2= p;
                decode= encode= cap=0;
            }
            if(p2 && strcmp(p->name, p2->name)==0){
                if(p->decode) decode=1;
                if(p->encode) encode=1;
                cap |= p->capabilities;
            }
        }
        if(p2==NULL)
            break;
        last_name= p2->name;
        
        printf(
            " %s%s%s%s%s%s %s", 
            decode ? "D": (/*p2->decoder ? "d":*/" "), 
            encode ? "E":" ", 
            p2->type == CODEC_TYPE_AUDIO ? "A":"V",
            cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S":" ",
            cap & CODEC_CAP_DR1 ? "D":" ",
            cap & CODEC_CAP_TRUNCATED ? "T":" ",
            p2->name);
       /* if(p2->decoder && decode==0)
            printf(" use %s for decoding", p2->decoder->name);*/
        printf("\n");
    }
    printf("\n");

    printf("Supported file protocols:\n");
    for(up = first_protocol; up != NULL; up = up->next)
        printf(" %s:", up->name);
    printf("\n");
    
    printf("Frame size, frame rate abbreviations:\n ntsc pal qntsc qpal sntsc spal film ntsc-film sqcif qcif cif 4cif\n");
    printf("Motion estimation methods:\n");
    pp = motion_str;
    while (*pp) {
        printf(" %s", *pp);
        if ((pp - motion_str + 1) == ME_ZERO) 
            printf("(fastest)");
        else if ((pp - motion_str + 1) == ME_FULL) 
            printf("(slowest)");
        else if ((pp - motion_str + 1) == ME_EPZS) 
            printf("(default)");
        pp++;
    }
    printf("\n\n");
    printf(
"Note, the names of encoders and decoders dont always match, so there are\n"
"several cases where the above table shows encoder only or decoder only entries\n"
"even though both encoding and decoding are supported for example, the h263\n"
"decoder corresponds to the h263 and h263p encoders, for file formats its even\n"
"worse\n");
    exit(1);
}

void parse_matrix_coeffs(uint16_t *dest, const char *str)
{
    int i;
    const char *p = str;
    for(i = 0;; i++) {
        dest[i] = atoi(p);
        if(i == 63)
            break;
        p = strchr(p, ',');
        if(!p) {
            fprintf(stderr, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
            exit(1);
        }
        p++;
    }
}

void opt_inter_matrix(const char *arg)
{
    inter_matrix = av_mallocz(sizeof(uint16_t) * 64);
    parse_matrix_coeffs(inter_matrix, arg);
}

void opt_intra_matrix(const char *arg)
{
    intra_matrix = av_mallocz(sizeof(uint16_t) * 64);
    parse_matrix_coeffs(intra_matrix, arg);
}

static void opt_target(const char *arg)
{
    int norm = -1;
    static const char *const frame_rates[] = {"25", "30000/1001", "24000/1001"};

    if(!strncmp(arg, "pal-", 4)) {
        norm = 0;
        arg += 4;
    } else if(!strncmp(arg, "ntsc-", 5)) {
        norm = 1;
        arg += 5;
    } else if(!strncmp(arg, "film-", 5)) {
        norm = 2;
        arg += 5;
    } else {
        int fr;
        /* Calculate FR via float to avoid int overflow */
        fr = (int)(frame_rate * 1000.0 / frame_rate_base);
        if(fr == 25000) {
            norm = 0;
        } else if((fr == 29970) || (fr == 23976)) {
            norm = 1;
        } else {
            /* Try to determine PAL/NTSC by peeking in the input files */
            if(nb_input_files) {
                int i, j;
                for(j = 0; j < nb_input_files; j++) {
                    for(i = 0; i < input_files[j]->nb_streams; i++) {
                        AVCodecContext *c = &input_files[j]->streams[i]->codec;
                        if(c->codec_type != CODEC_TYPE_VIDEO)
                            continue;
                        fr = c->time_base.den * 1000 / c->time_base.num;
                        if(fr == 25000) {
                            norm = 0;
                            break;
                        } else if((fr == 29970) || (fr == 23976)) {
                            norm = 1;
                            break;
                        }
                    }
                    if(norm >= 0)
                        break;
                }
            }
        }
        if(verbose && norm >= 0)
            fprintf(stderr, "Assuming %s for target.\n", norm ? "NTSC" : "PAL");
    }

    if(norm < 0) {
        fprintf(stderr, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
        fprintf(stderr, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
        fprintf(stderr, "or set a framerate with \"-r xxx\".\n");
        exit(1);
    }

    if(!strcmp(arg, "vcd")) {

        opt_video_codec("mpeg1video");
        opt_audio_codec("mp2");
        opt_format("vcd");

        opt_frame_size(norm ? "352x240" : "352x288");
        opt_frame_rate(frame_rates[norm]);
        opt_gop_size(norm ? "18" : "15");

        video_bit_rate = 1150000;
        video_rc_max_rate = 1150000;
        video_rc_min_rate = 1150000;
        video_rc_buffer_size = 40*1024*8;

        audio_bit_rate = 224000;
        audio_sample_rate = 44100;
        
        mux_packet_size= 2324;
        mux_rate= 2352 * 75 * 8;

        /* We have to offset the PTS, so that it is consistent with the SCR.
           SCR starts at 36000, but the first two packs contain only padding
           and the first pack from the other stream, respectively, may also have
           been written before.
           So the real data starts at SCR 36000+3*1200. */
        mux_preload= (36000+3*1200) / 90000.0; //0.44
    } else if(!strcmp(arg, "svcd")) {

        opt_video_codec("mpeg2video");
        opt_audio_codec("mp2");
        opt_format("svcd");

        opt_frame_size(norm ? "480x480" : "480x576");
        opt_frame_rate(frame_rates[norm]);
        opt_gop_size(norm ? "18" : "15");

        video_bit_rate = 2040000;
        video_rc_max_rate = 2516000;
        video_rc_min_rate = 0; //1145000;
        video_rc_buffer_size = 224*1024*8;
        use_scan_offset = 1;

        audio_bit_rate = 224000;
        audio_sample_rate = 44100;

        mux_packet_size= 2324;

    } else if(!strcmp(arg, "dvd")) {

        opt_video_codec("mpeg2video");
        opt_audio_codec("ac3");
        opt_format("dvd");

        opt_frame_size(norm ? "720x480" : "720x576");
        opt_frame_rate(frame_rates[norm]);
        opt_gop_size(norm ? "18" : "15");

        video_bit_rate = 6000000;
        video_rc_max_rate = 9000000;
        video_rc_min_rate = 0; //1500000;
        video_rc_buffer_size = 224*1024*8;

        mux_packet_size= 2048;  // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
        mux_rate = 10080000;    // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8

        audio_bit_rate = 448000;
        audio_sample_rate = 48000;

    } else if(!strcmp(arg, "dv")) {

        opt_format("dv");

        opt_frame_size(norm ? "720x480" : "720x576");
        opt_frame_rate(frame_rates[norm]);

        audio_sample_rate = 48000;
        audio_channels = 2;

    } else {
        fprintf(stderr, "Unknown target: %s\n", arg);
        exit(1);
    }
}

static void show_version(void)
{
    fprintf(stderr, "ffmpeg      " FFMPEG_VERSION "\n"
           "libavcodec  %d\n"
           "libavformat %d\n", 
           avcodec_build(), LIBAVFORMAT_BUILD);
    exit(1);
}

const OptionDef options[] = {
    /* main options */
    { "L", 0, {(void*)show_license}, "show license" },
    { "h", 0, {(void*)show_help}, "show help" },
    { "version", 0, {(void*)show_version}, "show version" },
    { "formats", 0, {(void*)show_formats}, "show available formats, codecs, protocols, ..." },
    { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
    { "img", HAS_ARG, {(void*)opt_image_format}, "force image format", "img_fmt" },
    { "i", HAS_ARG, {(void*)opt_input_file}, "input file name", "filename" },
    { "y", OPT_BOOL, {(void*)&file_overwrite}, "overwrite output files" },
    { "map", HAS_ARG | OPT_EXPERT, {(void*)opt_map}, "set input stream mapping", "file:stream" },
    { "map_meta_data", HAS_ARG | OPT_EXPERT, {(void*)opt_map_meta_data}, "set meta data information of outfile from infile", "outfile:infile" },
    { "t", HAS_ARG, {(void*)opt_recording_time}, "set the recording time", "duration" },
    { "fs", HAS_ARG | OPT_INT, {(void*)&limit_filesize}, "set the limit file size", "limit_size" }, //
    { "ss", HAS_ARG, {(void*)opt_start_time}, "set the start time offset", "time_off" },
    { "itsoffset", HAS_ARG, {(void*)opt_input_ts_offset}, "set the input ts offset", "time_off" },
    { "title", HAS_ARG | OPT_STRING, {(void*)&str_title}, "set the title", "string" },
    { "timestamp", HAS_ARG, {(void*)&opt_rec_timestamp}, "set the timestamp", "time" },
    { "author", HAS_ARG | OPT_STRING, {(void*)&str_author}, "set the author", "string" },
    { "copyright", HAS_ARG | OPT_STRING, {(void*)&str_copyright}, "set the copyright", "string" },
    { "comment", HAS_ARG | OPT_STRING, {(void*)&str_comment}, "set the comment", "string" },
    { "debug", HAS_ARG | OPT_EXPERT, {(void*)opt_debug}, "print specific debug info", "" },
    { "vismv", HAS_ARG | OPT_EXPERT, {(void*)opt_vismv}, "visualize motion vectors", "" },
    { "benchmark", OPT_BOOL | OPT_EXPERT, {(void*)&do_benchmark}, 
      "add timings for benchmarking" },
    { "dump", OPT_BOOL | OPT_EXPERT, {(void*)&do_pkt_dump}, 
      "dump each input packet" },
    { "hex", OPT_BOOL | OPT_EXPERT, {(void*)&do_hex_dump}, 
      "when dumping packets, also dump the payload" },
    { "bitexact", OPT_EXPERT, {(void*)opt_bitexact}, "only use bit exact algorithms (for codec testing)" }, 
    { "re", OPT_BOOL | OPT_EXPERT, {(void*)&rate_emu}, "read input at native frame rate", "" },
    { "loop", OPT_BOOL | OPT_EXPERT, {(void*)&loop_input}, "loop (current only works with images)" },
    { "v", HAS_ARG, {(void*)opt_verbose}, "control amount of logging", "verbose" },
    { "target", HAS_ARG, {(void*)opt_target}, "specify target file type (\"vcd\", \"svcd\", \"dvd\", \"dv\", \"pal-vcd\", \"ntsc-svcd\", ...)", "type" },
    { "threads", HAS_ARG | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },
    { "vsync", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&video_sync_method}, "video sync method", "" },
    { "async", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&audio_sync_method}, "audio sync method", "" },
    { "copyts", OPT_BOOL | OPT_EXPERT, {(void*)&copy_ts}, "copy timestamps" },
    { "shortest", OPT_BOOL | OPT_EXPERT, {(void*)&opt_shortest}, "finish encoding within shortest input" }, //

    /* video options */
    { "b", HAS_ARG | OPT_VIDEO, {(void*)opt_video_bitrate}, "set video bitrate (in kbit/s)", "bitrate" },
    { "vframes", OPT_INT | HAS_ARG | OPT_VIDEO, {(void*)&max_frames[CODEC_TYPE_VIDEO]}, "set the number of video frames to record", "number" },
    { "aframes", OPT_INT | HAS_ARG | OPT_AUDIO, {(void*)&max_frames[CODEC_TYPE_AUDIO]}, "set the number of audio frames to record", "number" },
    { "dframes", OPT_INT | HAS_ARG, {(void*)&max_frames[CODEC_TYPE_DATA]}, "set the number of data frames to record", "number" },
    { "r", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_rate}, "set frame rate (Hz value, fraction or abbreviation)", "rate" },
    { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
    { "aspect", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_aspect_ratio}, "set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)", "aspect" },
    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format", "format" },
    { "croptop", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop_top}, "set top crop band size (in pixels)", "size" },
    { "cropbottom", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop_bottom}, "set bottom crop band size (in pixels)", "size" },
    { "cropleft", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop_left}, "set left crop band size (in pixels)", "size" },
    { "cropright", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop_right}, "set right crop band size (in pixels)", "size" },
    { "padtop", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_pad_top}, "set top pad band size (in pixels)", "size" },
    { "padbottom", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_pad_bottom}, "set bottom pad band size (in pixels)", "size" },
    { "padleft", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_pad_left}, "set left pad band size (in pixels)", "size" },
    { "padright", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_pad_right}, "set right pad band size (in pixels)", "size" },
    { "padcolor", HAS_ARG | OPT_VIDEO, {(void*)opt_pad_color}, "set color of pad bands (Hex 000000 thru FFFFFF)", "color" },
    { "g", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_gop_size}, "set the group of picture size", "gop_size" },
    { "intra", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&intra_only}, "use only intra frames"},
    { "vn", OPT_BOOL | OPT_VIDEO, {(void*)&video_disable}, "disable video" },
    { "vdt", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)&video_discard}, "discard threshold", "n" },
    { "qscale", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qscale}, "use fixed video quantiser scale (VBR)", "q" },
    { "qmin", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qmin}, "min video quantiser scale (VBR)", "q" },
    { "qmax", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qmax}, "max video quantiser scale (VBR)", "q" },
    { "lmin", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_lmin}, "min video lagrange factor (VBR)", "lambda" },
    { "lmax", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_lmax}, "max video lagrange factor (VBR)", "lambda" },
    { "mblmin", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_mb_lmin}, "min macroblock quantiser scale (VBR)", "q" },
    { "mblmax", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_mb_lmax}, "max macroblock quantiser scale (VBR)", "q" },
    { "qdiff", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qdiff}, "max difference between the quantiser scale (VBR)", "q" },
    { "qblur", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qblur}, "video quantiser scale blur (VBR)", "blur" },
    { "qsquish", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qsquish}, "how to keep quantiser between qmin and qmax (0 = clip, 1 = use differentiable function)", "squish" },
    { "qcomp", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qcomp}, "video quantiser scale compression (VBR)", "compression" },
    { "rc_init_cplx", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_rc_initial_cplx}, "initial complexity for 1-pass encoding", "complexity" },
    { "b_qfactor", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_b_qfactor}, "qp factor between p and b frames", "factor" },
    { "i_qfactor", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_i_qfactor}, "qp factor between p and i frames", "factor" },
    { "b_qoffset", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_b_qoffset}, "qp offset between p and b frames", "offset" },
    { "i_qoffset", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_i_qoffset}, "qp offset between p and i frames", "offset" },
    { "ibias", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_ibias}, "intra quant bias", "bias" },