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 Posted: Tue, 12th May 2009 14:25 Post subject: VirtualDub |
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I have posted this on the VirtualDub forums and I'm getting absolutely no help at all, will it be any different here I wonder, maybe if someone here actually has experience with this software...
So here is the problem:
I have 2 video files - one I am using the video and I am using the audio from the other file...
The audio is about 5 seconds ahead of the video - and I can't seem to find how to delay the audio to match the video. I am trying Audio > Interleaving... and changing the default 500ms of audio before video starts to 5500 - then I start watching the video again and it doesn't seem my changes are taking effect or I'm doing something wrong. Do I have to re-encode the file to notice the changes or am I just being a newb here? (yes of course)
Okay I'm getting somewhere - I'm setting the Delay audio track by -5125ms - and I'm making sure the rest of the audio matches up but the longer I watch it the more it seems out of sync. So I have sync'd up the beginning but then the rest is not matching up - can someone clue me in on what I'm doing wrong - thanks...
Upon opening the avi in VirtualDub I am greeted with the following message:
[!] AVI: Variable bitrate (VBR) audio detected. VBR audio in AVI is
non-standard and you may encounter sync errors up to 74801ms when
attempting to extract WAV files or playing in some players. If this is a
problem, use Full Processing mode is recommended to decompress or
recompress the audio. (This warning can be disabled in Options,
Preferences, AVI. bitrate: 128.8 ± 17.1 kbps)
So can someone enlighten me on the best way to merge the variable bit audio with the video, thanks in advance...
Any helpful input please post!
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LeoNatan
☢ NFOHump Despot ☢
Posts: 73199
Location: Ramat Gan, Israel 🇮🇱
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| Posted: Tue, 12th May 2009 14:34 Post subject: |
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Let me present a simpler alternative - MKVtoolnix. Use mmg.exe in that to do exactly what you need - take the video from first file and the audio from the second, and you can specify a delay. The only possible downside would be it will make an MKV file and not an AVI.
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| Posted: Tue, 12th May 2009 14:50 Post subject: |
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Ok well I think the whole problem is the variable bit rate audio - but I'll give it a shot...
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LeoNatan
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Posts: 73199
Location: Ramat Gan, Israel 🇮🇱
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| Posted: Tue, 12th May 2009 14:58 Post subject: |
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Yes, virtualdub does not play well with variable bitrate audio. 
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| Posted: Tue, 12th May 2009 16:55 Post subject: |
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Alright well they merged just fine - not before freezing Windows 7 and forcing me to hit the reset button, but the video is delayed like 5-7 seconds behind the audio and I don't see any options to rectify this problem in mkvmerge...
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LeoNatan
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Posts: 73199
Location: Ramat Gan, Israel 🇮🇱
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| Posted: Tue, 12th May 2009 17:00 Post subject: |
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You must select the audio stream first, and then modify the delay. |
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| Posted: Tue, 12th May 2009 17:36 Post subject: |
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| Posted: Tue, 12th May 2009 17:52 Post subject: |
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Well I got it nearly a half a second away from syncing up the beginning but the rest is terribly off and it just seems to get worse and worse - the variable bit audio is doing me head in...
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LeoNatan
☢ NFOHump Despot ☢
Posts: 73199
Location: Ramat Gan, Israel 🇮🇱
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| Posted: Tue, 12th May 2009 18:10 Post subject: |
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Do something for me real quick, check the framerate of each or your videos. I have a feeling one has a 23.976 framerate, while the other one has 25.
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| Posted: Tue, 12th May 2009 18:48 Post subject: |
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| Posted: Tue, 12th May 2009 20:28 Post subject: |
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| iNatan wrote: | | Do something for me real quick, check the framerate of each or your videos. I have a feeling one has a 23.976 framerate, while the other one has 25. |
Good idea gotta switch back to 7 -
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| Posted: Tue, 12th May 2009 20:32 Post subject: |
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Okay both are showing 25 frames/second via windows explorer properties...
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LeoNatan
☢ NFOHump Despot ☢
Posts: 73199
Location: Ramat Gan, Israel 🇮🇱
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| Posted: Tue, 12th May 2009 21:25 Post subject: |
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And where does the 3m difference come from? Credits? Because if they have the same framerate, it should be pretty easy.
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