Is there any easy way to change volume?
I know there is tool to change mp3 volume w/o re-encoding. But it has to demux first and then remux. Painful for large file.
How about AC3 audio?
thanks!
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Just turn on the volume in windows ! :P
You can use a tool like Reaper or Sound Forge to normalize the sound level.
With AC3, you have to demux, convert and remux anyway...Shine as you should ! -
I don't think it's painful to edit audio in avi files.
Lets say you have an avi with mp3 audio
1) In virtualdub load the avi and choose streams, stream list. Select "demux" and name the file something like original.mp3. This extracts the audio. You can confirm the file is an mp3 by opening it with Gspot.
2) Edit with Audacity as needed (amplify etc..).and export as mp3 and choose a new name ie... edited.mp3.
3) In Virtualdub with original avi, (if you had closed the window), choose streams again, stream list, select "add" and locate and choose edited.mp3. You will now have 2 audio tracks. If you want to keep both use the moveup to make the new track primary. If you just want the new one then click on the one that says "source input avi" and click disable. This removes the original audio from the mux options to follow.
Since the new audio is already an mp3 we don't need to convert it or compress it so that's all that's needed. A bit more would be required if we had input a wav file but we can skip that here.
So now click "ok"
Then "file" and "save as" and select a new avi file name. Make sure the video mode option is set to "direct stream copy". This will mux the new avi and even for very large files will take no more than 3 minutes and probably a lot less.
I used mp3 as an example, virtuladub also works with ac3 audio but Audacity does not so you need another audio editor like Goldwave.
btw) As a side note, I haven't used it but it will also accept srt (subtitles files) and mux them this way also. -
Sound forge or audition do a great job by opening the avi file and saving the changes to the audio without touching the video.
drink up....the world's about to end -
Originally Posted by gll99
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There is an "Adjust Audio Volume" feature in Virtualdub but it is Full Processing mode so you have to recompress the audio.
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Donadagohvi (Cherokee for "Until we meet again")
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