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: improve behaviour with invalid reference lists

Browse Source 
Before 741b494fa8, when the reference list
modification description was invalid, the code would substitute the
corresponding reference from the initial ("default") reference list.
After that commit, it will just return an error.

Since there are apparently invalid samples in the wild that used to play
fine with the old code, it is a good idea to re-add some sort of error
resilience here. So, when the reference list modification results in a
missing frame, substitute a previous reference frame for it. The
relevant sample again decodes fine with the same output as previously.
This commit is contained in:
Anton Khirnov 2015-12-17 19:38:24 +01:00
parent 40d9496773
commit 9d74012761
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libavcodec/h264_refs.c
View File

@ -325,7 +325,10 @@ int ff_h264_decode_ref_pic_list_reordering(H264Context *h, H264SliceContext *sl)
for (index = 0; index < sl->ref_count[list]; index++) {
if (!sl->ref_list[list][index].parent) {
av_log(h->avctx, AV_LOG_ERROR, "Missing reference picture\n");
return -1;
if (index == 0 || h->avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
else
sl->ref_list[list][index] = sl->ref_list[list][index - 1];
}
}
}