[FFmpeg-trac] #3705(undetermined:open): Seeking fails for H264 file

[FFmpeg]

#3705: Seeking fails for H264 file
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             Reporter:               |                    Owner:
  Aleksoid1978                       |                   Status:  open
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by v0lt):

 After searching, I get this log
 {{{
 Reinit context to 1920x1088, pix_fmt: dxva2_vld
 [h264 @ 000000000f00e0c0] co located POCs unavailable
 [h264 @ 000000000f00e0c0] co located POCs unavailable
 [h264 @ 000000000f00e0c0] co located POCs unavailable
 [h264 @ 000000000f00e0c0] co located POCs unavailable
 [h264 @ 000000000f00e0c0] mmco: unref short failure
 [h264 @ 000000000f00e0c0] number of reference frames (0+4) exceeds max (3;
 probably corrupt input), discarding one
 [h264 @ 000000000f00e0c0] reference picture missing during reorder
 [h264 @ 000000000f00e0c0] Missing reference picture, default is 65534
 [h264 @ 000000000f00e0c0] reference picture missing during reorder
 [h264 @ 000000000f00e0c0] Missing reference picture, default is 65534
 [h264 @ 000000000f00e0c0] reference picture missing during reorder
 [h264 @ 000000000f00e0c0] Missing reference picture, default is 65534
 [h264 @ 000000000f00e0c0] reference picture missing during reorder
 [h264 @ 000000000f00e0c0] Missing reference picture, default is 65534
 [h264 @ 000000000f00e0c0] mmco: unref short failure
 [h264 @ 000000000f00e0c0] number of reference frames (0+4) exceeds max (3;
 probably corrupt input), discarding one
 [h264 @ 000000000f00e0c0] mmco: unref short failure
 }}}
 On line ''h->cur_pic_ptr->recovered |= 1;'' I get the following data.
 {{{
 err == 0
 h->short_ref_count == 3
 pps_ref_count[0] == 4
 pps_ref_count[1] == 1
 h->avctx->has_b_frames == 2
 h->picture_structure == PICT_FRAME
 h->has_recovery_point == 0
 }}}
 I see two ways to change the check.
 {{{
 h->short_ref_count<=3
 }}}
 or
 {{{
 pps_ref_count[0] <= 4 && pps_ref_count[1] <= 1 && h->avctx->has_b_frames
 }}}
 But I do not know which one is more correct.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3705#comment:10>
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