From 3a727606c474d3d0b9efa3c900294a84bdb5e331 Mon Sep 17 00:00:00 2001 From: Ivan Date: Tue, 12 Apr 2016 16:32:04 -0400 Subject: [PATCH] avcodec/h264: Fix for H.264 configuration parsing Sometimes video fails to decode if H.264 configuration changes mid stream. The reason is that configuration parser assumes that nal_ref_idc is equal to 11b while actually some codecs but 01b there. The H.264 spec is somewhat vague about this but it looks like it allows any non-zero nal_ref_idc for sps/pps. Signed-off-by: Michael Niedermayer --- libavcodec/h264.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/h264.c b/libavcodec/h264.c index f1399b886a..88768af733 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -1781,7 +1781,7 @@ static int is_extra(const uint8_t *buf, int buf_size) const uint8_t *p= buf+6; while(cnt--){ int nalsize= AV_RB16(p) + 2; - if(nalsize > buf_size - (p-buf) || p[2]!=0x67) + if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7) return 0; p += nalsize; } @@ -1790,7 +1790,7 @@ static int is_extra(const uint8_t *buf, int buf_size) return 0; while(cnt--){ int nalsize= AV_RB16(p) + 2; - if(nalsize > buf_size - (p-buf) || p[2]!=0x68) + if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8) return 0; p += nalsize; }