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  1. HOW TO INCREASE AUDIO VOLUME IN A AVI FILE USING VIRTUAL DUB, WITHOUT HAVING TO DEMU N MULTIPLEX???

    THANXS
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  2. Ok Im not sure but you can try doing this. Load of your AVI or Mpeg in VDub . In the AUdio'sTab select Full Processing mode. Then an option Called Volume is highlighted. Clikc on Adjust Audio Of Volume Channels and raise it HIGH !. OK and Save As. Make sure your Video setting is set to Direct Stream Copy.


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  3. Member
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    Sep 2002
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    1. Select Audio Settings.
    2. Tick 'Full Processing Mode'
    3. Select Audio settings again.
    4. Select 'Volume'.
    5. Tick 'Adjust volume' and set the desired volume with the slider control.
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  4. Thanxs once more my friends!!!!
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  5. No pro lem moi frend...

    (Spanish accent)
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  6. Member
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    Sorry to dig up this years old thread, but i'm wondering how to increase volume on just one of three audio channels? thanks!
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  7. Mod Neophyte Super Moderator redwudz's Avatar
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    Drop the video file into Audacity, change the volume levels as desired, then mux back into your video with VirtualDub.
    This works for most AVI type video files.

    Other types/formats, demux the audio, add to Audacity, combine or 'remux' back with the original video.
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  8. Member
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    I just found an ffmpeg command that will pull the video and just that track, boost it by x db and save as an mp4.

    Testing it now, thanks!
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  9. Member
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    Can you post the script, I have the same issue with intrusive left and right channel levels on some TV recordings.
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  10. Member
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    Here's what I am using... this assumes the video is track#0 and the only audio track you want is #3 and you want to increase its volume x30 (multiples of 256):

    ffmpeg -i 000.ts -map 0:0 -map 0:3 -vol 7680 000fixed.mp4

    This starts with a .TS file and produces a .MP4 with the video and one audio channel

    I am sure you can select many different source and destination file types.
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  11. Member
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    I've misunderstood.
    What I was looking for was not to boost the track, but to pick out the centre channel of the track boost it then use that centre channel as a new stereo track.
    I've been doing this with a convoluted bat file using ffmpeg and eac3to.
    Rem convert 5.1 audio track to a 6 channel wav
    ffmpeg -i grimm.mpg -acodec pcm_s16le -ac 6 audio.wav
    Rem convert wav to individual channels
    eac3to audio.wav somefile.wavs
    Rem boost centre channel
    ffmpeg -i somefile.C.wav -acodec ac3 -ar 48000 -ab 128k -ac 2 -vol 2560 test.ac3
    Rem create temp video with no audio
    ffmpeg -i grimm.mpg -map 0:0 -vcodec copy testv.mpg
    Rem combine centre channel with video
    ffmpeg -i test.ac3 -i testv.mpg -acodec copy -vcodec copy grimm_.mpg
    Rem cleanup
    del somefile*.*
    del test.ac3
    del testv.mpg
    del audio.wav
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    i don't know how to pull channels from within an audio track, but i'll check out your script and see how it works. sounds interesting.
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  13. Member
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    I think it's like the code below, the only (?) advantage to the original is that it doesn't call eac3to
    Rem https://trac.ffmpeg.org/wiki/AudioChannelManipulation
    Rem track 0:3 is 5.1 audio, convert to 6 channel wav
    ffmpeg -i titanic.mpg -map 0:3 -c:a pcm_s16le -ac 6 titanic.wav
    Rem select FC channel from 6 channels
    ffmpeg -i titanic.wav -map_channel 0.0.2 front_center.wav
    Rem convert FC channel to stereo ac3
    ffmpeg -i front_center.wav -acodec ac3 -ar 48000 -ab 128k -ac 2 -vol 2560 front_center.ac3
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    Id love to keep audio track 1 and just increase volume on track 3 but cant figure that one out
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    I'm assuming that it's the actual audio track you refer to - not individual channels making up the track?
    This bat keeps two of three audio tracks , boosts 1 and discards 1.
    I couldn't figure any other way of doing it.

    Rem from ffmpeg information titanic.mpg
    Rem map 0:0 is video
    Rem map 0:1 is Spanish, discard
    Rem map 0:2 is stereo French, keep
    Rem map 0:3 is 5.1 English, keep and boost
    ::
    Rem Demux video
    ffmpeg -i titanic.mpg -map 0:0 -vcodec copy titanic_.mpg
    Rem demux French audio
    ffmpeg -i titanic.mpg -map 0:2 -c:a copy french.ac3
    Rem convert English to 6 channel wav
    ffmpeg -i titanic.mpg -map 0:3 -c:a pcm_s16le -ac 6 t3.wav
    Rem convert and boost English wav to 6 channel ac3
    ffmpeg -i t3.wav -acodec ac3 -ar 48000 -ab 384k -ac 6 -vol 2560 new.ac3

    Rem combine video and audio; map in sequence

    ffmpeg -i titanic_.mpg -i french.ac3 -i new.ac3 -map 0 -map 1 -map 2 -codec copy t3.mpg
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