[FFmpeg-devel] [PATCH 0/1] avcodec/h264: Fix poc_lsb in open gop context

[Nicolas Gaullier]

This fixes parsing of live captures with 'open GOP' when poc_type=0.
At init, prev_poc_lsb is set to zero by defaut whereas it is undefined.
If the stream starts with a high poc_lsb (ie. > max_poc_lsb/2),
then the poc_msb is wrongly incremented.

I have uploaded a sample where log2_max_pic_order_cnt_lsb_minus4=5 ie. 512 frames (@25fps),
thus there is about 10 seconds of video that are 'lost'.
https://framadrop.org/r/a5RSjBKXAS#yBbeVfBR4LQwK4x3seqg4uGRdPv8FLJ6YNv8dVpjGJ4=

NB: FATE pass without modification

Thank you for the review,
Nicolas

Nicolas Gaullier (1):
  avcodec/h264: Fix poc_lsb in open gop context

 libavcodec/h264_parse.c | 2 ++
 libavcodec/h264dec.c    | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

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2.14.1.windows.1