virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

h264: enable low delay only if no delayed frames were seen

Browse Source 
Dropping frames is undesirable but that is the only way by which the
decoder could return to low delay mode. Instead emit a warning and
continue with delayed frames.
Fixes a crash in fuzzed sample nasa-8s2.ts_s20033 caused by a larger
than expected has_b_frames value. Low delay keeps getting re-enabled
from a presumely broken SPS.

CC: libav-stable@libav.org
This commit is contained in:
Janne Grunau 2012-11-16 14:31:09 +01:00
parent 7ee4071362
commit 706acb558a
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavcodec/h264.c
View File

@ -3867,8 +3867,14 @@ again:
if (s->flags & CODEC_FLAG_LOW_DELAY ||
(h->sps.bitstream_restriction_flag &&
!h->sps.num_reorder_frames))
s->low_delay = 1;
!h->sps.num_reorder_frames)) {
if (s->avctx->has_b_frames > 1 || h->delayed_pic[0])
av_log(avctx, AV_LOG_WARNING, "Delayed frames seen "
"reenabling low delay requires a codec "
"flush.\n");
else
s->low_delay = 1;
}
if (avctx->has_b_frames < 2)
avctx->has_b_frames = !s->low_delay;