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Sound and video out of sync

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stephen22
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Sound and video out of sync

Mon Dec 03, 2007 2:52 am

I'm using the .5 Ubuntu Gutsy version, and the audio is about two seconds behind the video in every project I make. Even if I just add/export a single clip.



Any idea what might be causing this? BTW I'm using FFMPEG 3:0.cvs20070307-5ubuntu4



kadag
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Re: Sound and video out of sync

Sun Apr 27, 2008 5:43 am

same here



it's a pity



looks like a otherwise good program



Weevil
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Re: Sound and video out of sync

Sat May 10, 2008 10:35 am

I'm having sync problems also, using Kdenlive 0.6.0-svn (Using KDE 3.5.7 "release 72.9" openSUSE 10.3) installed from Yast repository.

The video files I use are MPG, 720x576 25fps with mpeg2video & liba52 codec. Audio is at 48000Hz on 6 channels.



Watching a clip in the clip monitor from beginning to end seems to keep everything in sync, when I start watching from a random point in the clip timeline audio gets off-sync. Not by 2 seconds like stephen22 has but still enough to make the video unattractive/unusable.



When the files are loaded the terminal gives me warning about "No accelerated IMDCT transform found" ... I think this might have some relevance but the IMDCT transform explanations on internet are just a little bit too complicated for me to understand :)



Weevil
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Re: Sound and video out of sync

Sat May 10, 2008 10:41 pm

OK so when I convert my mpg's to MPEG-PS (Program Stream... It's better than MPEG-TS apparently) with Avidemux they seem to have no sound-sync issues in Kdenlive! Since this is my first real video-editing journey in linux I'm very happy that I finally seem to have a somewhat stable & working Kdenlive / fileformat... I'll post the result in the Kdenlive Theatre someday or come back crying to the Bug forum - like why I have to [ View > Sync Timeline ] everytime after moving multiple clips at once or why Kdenlive isn't able to completely shutdown and keeps giving me the 'ICE default IO error handler doing an exit()' thingy...





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