If there are consecutive IDR pictures, then SPS/PPS should be prepended
to all of them, not only the first one.
---
libavcodec/h264_mp4toannexb_bsf.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavcodec/h264_mp4toannexb_bsf.c
b/libavcodec/h264_mp4toannexb_bsf.c
index a7b4f41..a003a1d 100644
--- a/libavcodec/h264_mp4toannexb_bsf.c
+++ b/libavcodec/h264_mp4toannexb_bsf.c
@@ -179,6 +179,11 @@ static int
h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
if (ctx->first_idr && (unit_type == 7 || unit_type == 8))
ctx->idr_sps_pps_seen = 1;
+ /* if this is a new IDR picture following an IDR picture, reset the
idr flag.
+ * Just check first_mb_in_slice to be 0 as this is the simplest
solution.
+ * This could be checking idr_pic_id instead, but would complexify the
parsing. */
+ if (!ctx->first_idr && unit_type == 5 && (buf[1] & 0x80))
+ ctx->first_idr = 1;
/* prepend only to the first type 5 NAL unit of an IDR picture, if no
sps/pps are already present */
if (ctx->first_idr && unit_type == 5 && !ctx->idr_sps_pps_seen) {
--
2.0.1.442.g7fe6834
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