ffmpeg.c

            }
            frame_height = enc->height;
            frame_width = enc->width;
	    frame_aspect_ratio = av_q2d(enc->sample_aspect_ratio) * enc->width / enc->height;
	    frame_pix_fmt = enc->pix_fmt;
            rfps      = ic->streams[i]->r_frame_rate.num;
            rfps_base = ic->streams[i]->r_frame_rate.den;
            enc->workaround_bugs = workaround_bugs;
            enc->error_resilience = error_resilience; 
            enc->error_concealment = error_concealment; 
            if(enc->lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
            if(me_threshold)
                enc->debug |= FF_DEBUG_MV;

            if (enc->time_base.den != rfps || enc->time_base.num != rfps_base) { 

                if (verbose >= 0)
                    fprintf(stderr,"\nSeems that stream %d comes from film source: %2.2f (%d/%d) -> %2.2f (%d/%d)\n",
                            i, (float)enc->time_base.den / enc->time_base.num, enc->time_base.den, enc->time_base.num,

                    (float)rfps / rfps_base, rfps, rfps_base);
            }
            /* update the current frame rate to match the stream frame rate */
            frame_rate      = rfps;
            frame_rate_base = rfps_base;

            enc->rate_emu = rate_emu;
            if(video_disable)
                ic->streams[i]->discard= AVDISCARD_ALL;
            else if(video_discard)
                ic->streams[i]->discard= video_discard;
            break;
        case CODEC_TYPE_DATA:
            break;
        case CODEC_TYPE_SUBTITLE:
            break;
        case CODEC_TYPE_UNKNOWN:
            break;
        default:
            av_abort();
        }
    }
    
    input_files[nb_input_files] = ic;
    input_files_ts_offset[nb_input_files] = input_ts_offset - (copy_ts ? 0 : timestamp);
    /* dump the file content */
    if (verbose >= 0)
        dump_format(ic, nb_input_files, filename, 0);

    nb_input_files++;
    file_iformat = NULL;
    file_oformat = NULL;
    image_format = NULL;

    grab_device = NULL;
    video_channel = 0;
    
    rate_emu = 0;
}

static void opt_grab(const char *arg)
{
    file_iformat = av_find_input_format(arg);
    opt_input_file("");
}

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:
            case CODEC_TYPE_UNKNOWN:
            case CODEC_TYPE_SUBTITLE:
                break;
            default:
                av_abort();
            }
        }
    }
    *has_video_ptr = has_video;
    *has_audio_ptr = has_audio;
}

static void new_video_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *video_enc;
    int codec_id;
    
    st = av_new_stream(oc, 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(   (video_global_header&1)
       || (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))){
        video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avctx_opts->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if(video_global_header&2){
        video_enc->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
        avctx_opts->flags2|= CODEC_FLAG2_LOCAL_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(oc->oformat, NULL, oc->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);
        
        for(i=0; i<opt_name_count; i++){
             AVOption *opt;
             double d= av_get_double(avctx_opts, opt_names[i], &opt);
             if(d==d && (opt->flags&AV_OPT_FLAG_VIDEO_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                 av_set_double(video_enc, opt_names[i], d);
        }
                
        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;

        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 (b_frames) {
            video_enc->max_b_frames = b_frames;
            video_enc->b_frame_strategy = b_strategy;
            video_enc->b_quant_factor = 2.0;
        }
        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->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->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->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->nsse_weight= nsse_weight;
        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;

        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;
            }
        }
    }

    /* reset some key parameters */
    video_disable = 0;
    video_codec_id = CODEC_ID_NONE;
    video_stream_copy = 0;
}

static void new_audio_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *audio_enc;
    int codec_id, i;
            
    st = av_new_stream(oc, 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 (oc->oformat->flags & AVFMT_GLOBALHEADER) {
        audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avctx_opts->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if (audio_stream_copy) {
        st->stream_copy = 1;
        audio_enc->channels = audio_channels;
    } else {
        codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_AUDIO);
       
        for(i=0; i<opt_name_count; i++){
            AVOption *opt;
            double d= av_get_double(avctx_opts, opt_names[i], &opt);
            if(d==d && (opt->flags&AV_OPT_FLAG_AUDIO_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                av_set_double(audio_enc, opt_names[i], d);
        }
       
        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;
        if (audio_qscale > QSCALE_NONE) {
            audio_enc->flags |= CODEC_FLAG_QSCALE;
            audio_enc->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
        }
        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;
    audio_enc->time_base= (AVRational){1, audio_sample_rate};
    if (audio_language) {
        pstrcpy(st->language, sizeof(st->language), audio_language);
        av_free(audio_language);
        audio_language = NULL;
    }

    /* reset some key parameters */
    audio_disable = 0;
    audio_codec_id = CODEC_ID_NONE;
    audio_stream_copy = 0;
}

static void opt_new_subtitle_stream(void)
{
    AVFormatContext *oc;
    AVStream *st;
    AVCodecContext *subtitle_enc;
    int i;
            
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        exit(1);
    }

    subtitle_enc = st->codec;
    subtitle_enc->codec_type = CODEC_TYPE_SUBTITLE;
    if (subtitle_stream_copy) {
        st->stream_copy = 1;
    } else {
        for(i=0; i<opt_name_count; i++){
             AVOption *opt;
             double d= av_get_double(avctx_opts, opt_names[i], &opt);
             if(d==d && (opt->flags&AV_OPT_FLAG_SUBTITLE_PARAM) && (opt->flags&AV_OPT_FLAG_ENCODING_PARAM))
                 av_set_double(subtitle_enc, opt_names[i], d);
        }
        subtitle_enc->codec_id = subtitle_codec_id;
    }

    if (subtitle_language) {
        pstrcpy(st->language, sizeof(st->language), subtitle_language);
        av_free(subtitle_language);
        subtitle_language = NULL;
    }

    subtitle_codec_id = CODEC_ID_NONE;
    subtitle_stream_copy = 0;
}

static void opt_new_audio_stream(void)
{
    AVFormatContext *oc;
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];
    new_audio_stream(oc);
}

static void opt_new_video_stream(void)
{
    AVFormatContext *oc;
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        exit(1);
    }
    oc = output_files[nb_output_files - 1];
    new_video_stream(oc);
}

static void opt_output_file(const char *filename)
{
    AVFormatContext *oc;
    int use_video, use_audio, input_has_video, input_has_audio;
    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;
    pstrcpy(oc->filename, sizeof(oc->filename), filename);

    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 || video_codec_id != CODEC_ID_NONE;
        use_audio = file_oformat->audio_codec != CODEC_ID_NONE || audio_stream_copy || audio_codec_id != CODEC_ID_NONE;

        /* 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;
        }
        
        if (use_video) {
            new_video_stream(oc);
        }
    
        if (use_audio) {
            new_audio_stream(oc);
        }

        if (!oc->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;

    /* 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);
    oc->loop_output = loop_output;

    /* reset some options */
    file_oformat = NULL;
    file_iformat = NULL;
    image_format = NULL;
}

/* 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 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;
        const char *type_str;

        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;
        
        switch(p2->type) {
        case CODEC_TYPE_VIDEO:
            type_str = "V";
            break;
        case CODEC_TYPE_AUDIO:
            type_str = "A";
            break;
        case CODEC_TYPE_SUBTITLE:
            type_str = "S";
            break;
        default:
            type_str = "?";
            break;
        }
        printf(
            " %s%s%s%s%s%s %s", 
            decode ? "D": (/*p2->decoder ? "d":*/" "), 
            encode ? "E":" ", 
            type_str,
            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;
        opt_default("flags", "+SCAN_OFFSET");


        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;