Re: video and audio not playing synchroneously

Posted by hasloe at 2007-03-14 11:32

The size of the media files will indeed not be the problem, nor the computer specifications.
What is the operating system and how are the files encoded?

If you have extracted a separate audio file you could make this the first file in the list of associated media files (Edit -> Linked Files). The sound will then be produced from this file instead of from the video file, this might improve the play selection synchronicity.

Han

Re: Re: video and audio not playing synchroneously

Posted by Tashram at 2007-03-15 23:19

ok, but there's just one single mpeg file in there anyway? problem is that whereever i put the crosshairs the video starts without playing the audio (not just in selection mode). then it stops and when the audio sets in, the video comes along too. does the programme split audio from video or something? i just wonder where this temporary asynchronity comes from.

marsha

Re: Re: video and audio not playing synchroneously

Posted by Tashram at 2007-03-20 10:53

What is the operating system and how are the files encoded?

windows xp home edition, mpeg files

Re: Re: Re: video and audio not playing synchroneously

Posted by hasloe at 2007-03-20 15:09

ELAN doesn't do anything to the video file, it merely passes the file to the underlying media framework. In the case of XP this means the Windows Media Player (more accurate Direct Show).
Do you see the same effect in Windows Media Player when hitting the play/pause button several times?

Re: Re: Re: Re: video and audio not playing synchroneously

Posted by Tashram at 2007-03-20 17:12

hi. ok, when i open the file with wmp the sound comes instantly, but the picture is a split sec delayed? with elan it's the other way round.

Re: Re: Re: Re: Re: video and audio not playing synchroneously

Posted by hasloe at 2007-03-21 16:15

That is strange. But it still seems to indicate that there is something special with the file?

Re: Re: Re: Re: Re: Re: video and audio not playing synchroneously

Posted by Tashram at 2007-03-26 15:58

hi there, the programm we changed the original avi video into mpeg was TMPGEnc (http://www.tmpgenc.net/de/index.html). oddly enough my collegue opened the file with ELAN 3.0 on the institute's computer and it worked without any delays? *sigh* must be something about my computer... i was told that maybe some codec was missing, could that be a problem? (so i downloaded divx) marsha

Re: Re: Re: Re: Re: Re: Re: video and audio not playing synchroneously

Posted by hasloe at 2007-03-28 09:53

It could also be that there is a codec installed that causes this problem. ELAN logs the detected codec in it's log file in <user_home>/.elan_data/elan0.log (or elan1.log).
If you open ELAN, open one of your problem files and close ELAN again, you'll find a list of codecs actually in the 'chain' for the associated file(s). You could compare this list with that from another computer and maybe identify the 'problematic' codec.

Han

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Re: video and audio not playing synchroneously