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Old 27th January 2009, 23:00   #1  |  Link
wst
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Sync issues in FLV to MKV or AVI Remux

Hi all -

I'm trying to remux an FLV I grabbed off C-SPAN with Replay Media Catcher.

I used FLVExtract to get the audio, video, and timecode. I tried muxing to MKV with MKVMergeGUI, giving it A+V+Timecode, but the sync was way off. I also tried bringing the A+V into VirtualDub and setting the framerate to match the audio length, but had a similar sync issue.

The final output can be MOV, AVI, MKV, MP4 - I don't care - just not FLV, because I can't stream it to my TV. If you guys have any ideas, I'd surely appreciate it.

Here's the file:

http://rapidshare.com/files/19036466...0DFE7.flv.html
(about 100MB, FYI)

Thanks.
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Old 28th January 2009, 17:49   #2  |  Link
Kurtnoise
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Try this:

Code:
FFmpeg -i myfile.flv -vcodec copy -acodec copy output.mkv
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Old 29th January 2009, 21:20   #3  |  Link
wst
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Thanks Kurtnoise - that did indeed clear up the sync problem. (Though, not in MPC for some reason).

However, now there are these odd audio artifacts. It sounds like a "cutting out"-type sound - a garbled, high-pitched swoosh of MPEG noise is my best description. Should the audio be reencoded or processed in some way to fix that?

Thanks again,

Will
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Old 3rd February 2009, 23:14   #4  |  Link
wst
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I tried

Code:
FFmpeg -i "myfile.flv" -vcodec copy -acodec libmp3lame -ab 192kbps "output.mkv"
which fixed the audio glitches, but reintroduced the sync problem.
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Old 17th June 2011, 12:47   #5  |  Link
lovelove
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wst, have you been able to solve the sync problem?
If yes, could you please post the solution? thank you.
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Old 17th June 2011, 19:32   #6  |  Link
wst
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Sorry bro, I never figured it out. Maybe try some different settings on libmp3lame, or maybe a new version of ffmpeg...good luck!
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