[FFmpeg-trac] #1725(avfilter:new): filter_complex losing frames

[FFmpeg]

#1725: filter_complex losing frames
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             Reporter:  takis       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by Cigaes):

 This particular file is missing its "second" frame, i.e., the frame at
 pts=1/24, just between pts=0/24 and pts=2/24:
 {{{
 $ ffprobe -loglevel quiet -show_frames -of compact
 /tmp/big_buck_bunny_1080p_h264.mov
 frame|media_type=video|key_frame=1|pkt_pts=0|pkt_pts_time=0.000000|pkt_dts=-100|pkt_dts_time=-0.041667|pkt_duration=100|pkt_duration_time=0.041667|pkt_pos=441422|width=1920|height=1080|pix_fmt=yuv420p|sample_aspect_ratio=N/A|pict_type=I|coded_picture_number=0|display_picture_number=0|interlaced_frame=0|top_field_first=0|repeat_pict=0|reference=0
 frame|media_type=video|key_frame=0|pkt_pts=200|pkt_pts_time=0.083333|pkt_dts=0|pkt_dts_time=0.000000|pkt_duration=100|pkt_duration_time=0.041667|pkt_pos=447743|width=1920|height=1080|pix_fmt=yuv420p|sample_aspect_ratio=N/A|pict_type=P|coded_picture_number=1|display_picture_number=0|interlaced_frame=0|top_field_first=0|repeat_pict=0|reference=0
 frame|media_type=video|key_frame=0|pkt_pts=300|pkt_pts_time=0.125000|pkt_dts=300|pkt_dts_time=0.125000|pkt_duration=100|pkt_duration_time=0.041667|pkt_pos=592358|width=1920|height=1080|pix_fmt=yuv420p|sample_aspect_ratio=N/A|pict_type=B|coded_picture_number=4|display_picture_number=0|interlaced_frame=0|top_field_first=0|repeat_pict=0|reference=0
 frame|media_type=video|key_frame=0|pkt_pts=400|pkt_pts_time=0.166667|pkt_dts=400|pkt_dts_time=0.166667|pkt_duration=100|pkt_duration_time=0.041667|pkt_pos=448026|width=1920|height=1080|pix_fmt=yuv420p|sample_aspect_ratio=N/A|pict_type=P|coded_picture_number=3|display_picture_number=0|interlaced_frame=0|top_field_first=0|repeat_pict=0|reference=3
 }}}

 You can force it to be duplicated, and therefore available for overlay by
 inserting the {{{fps=fps=24}}} near the input (just after the scale,
 probably).

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1725#comment:6>
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