[FFmpeg-trac] #1556(undetermined:new): Frame rate changed without changeing timestamps

[FFmpeg]

#1556: Frame rate changed without changeing timestamps
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             Reporter:  FishB8  |                    Owner:
                 Type:  defect  |                   Status:  new
             Priority:  normal  |                Component:  undetermined
              Version:  0.11.1  |               Resolution:
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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Comment (by FishB8):

 After taking some raw samples I think I might be seeing what's causing the
 problem.

 After capturing samples from both audio capture modes, and looking at the
 packets it seems that the audio duration of the packets is very different
 from the embedded source.

 Running ffprobe -show_packets I can see that the audio packets from the
 analog source are the same length as the video packets:
 duration_time=0.016667

 The video packets from the embedded source are unchanged, but the audio
 packets are different: duration_time=0.015312 (duration 735 vs 800 from
 the analog source)

 The audio packets from the analog source seem to be interleaved one to one
 with the video packets, but the audio packets from the embedded source
 occasionally double up. (probably to make up the duration difference)

 The question is if ffmpeg is incorrectly handling the audio when the
 packets durations are different than video durations, or if the capture
 code is not handling embedded sources correctly.

 I can provide the two samples, but each are about 10 seconds long which
 comes out to 1.1G each. :P

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1556#comment:9>
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