[FFmpeg-trac] #3064(undetermined:new): Audio drafting out of sync on Samsung TV with ffmpeg created MP4 or MKV file

[FFmpeg]

#3064: Audio drafting out of sync on Samsung TV with ffmpeg created MP4 or MKV
file
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             Reporter:  ramitbhalla  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by ramitbhalla):

 This problem is only happening when using WTV as a source. what I'm
 confused is that ffmpeg is converting (from scratch if I'm right) mpeg2 to
 mpeg4, it's creating a whole new file, no copying/remuxing etc. What about
 the file being created is dependent upon the source of the video/container
 (in this case WTV)? Why is a mp4 file created from a wtv source different
 from a wtv file created from any other source?

 Regarding the yadif filter, I see your point. I don't know of any way to
 "detect" whether the source is interlaced or not. I understand the idet
 filter is not reliable and only ends up adding overhead to the processing
 time (correct me if I'm wrong here), so just as a safety I apply the yadif
 filter to all source files (since applying to a progressive video looks
 better than not applying to a interlaced video). Any ideas on what I can
 do detect if the source is interlaced?

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3064#comment:19>
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