libx265: Add option to force IDR frames

This is in the same the same vein as 38014692.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/libx265.c

@@ -42,6 +42,7 @@ typedef struct libx265Context {
     const x265_api *api;
 
     float crf;
+    int   forced_idr;
     char *preset;
     char *tune;
     char *x265_opts;
@@ -263,7 +264,8 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         x265pic.pts      = pic->pts;
         x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth;
 
-        x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ? X265_TYPE_I :
+        x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ?
+                                              (ctx->forced_idr ? X265_TYPE_IDR : X265_TYPE_I) :
                             pic->pict_type == AV_PICTURE_TYPE_P ? X265_TYPE_P :
                             pic->pict_type == AV_PICTURE_TYPE_B ? X265_TYPE_B :
                             X265_TYPE_AUTO;
@@ -348,6 +350,7 @@ static av_cold void libx265_encode_init_csp(AVCodec *codec)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
     { "crf",         "set the x265 crf",                                                            OFFSET(crf),       AV_OPT_TYPE_FLOAT,  { .dbl = -1 }, -1, FLT_MAX, VE },
+    { "forced-idr",  "if forcing keyframes, force them as IDR frames",                              OFFSET(forced_idr),AV_OPT_TYPE_INT,    { .i64 =  0 },  0,       1, VE },
     { "preset",      "set the x265 preset",                                                         OFFSET(preset),    AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "tune",        "set the x265 tune parameter",                                                 OFFSET(tune),      AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 57
 #define LIBAVCODEC_VERSION_MINOR 28
-#define LIBAVCODEC_VERSION_MICRO  1
+#define LIBAVCODEC_VERSION_MICRO  2
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \