Mux audio tracks inside in avi file

[Igniz]

Hi! I need to mux audio tracks insides an avi file. I would also like the first audio track have a lower sound. It's possible?

[transporterfan]

Yes, is possible. Takes a little work

To alter track volume
https://www.videohelp.com/software/Audacity
http://wiredpen.com/resources/audacity/adjust-sound-audacity-envelope-tool/

To mux tracks into AVI
https://www.videohelp.com/software/AVIMux-GUI

If the two tracks are the same length all should be fine.
You may have to pad one file with 'silence' in Audacity if it has to begin at a particular point on the timeline.
You may also have to trim the files length in there too, or the file will overun on playback (so you have audio with no picture)
Pay attention to the audio types allowed in an AVI. You may need to convert.

[Igniz]

Thanks... I already tryed Avimux, but I can't find the option for mix audio tracks...

[Marsia Mariner]

Thanks... I already tryed Avimux, but I can't find the option for mix audio tracks...

Maybe you just need more

[Igniz]

But... don't works!!! I select the avi and click "save" but the audio tracks contained in the avi remain divided.

[Marsia Mariner]

It seems that by "tracks" you actually mean *audio CHANNELS*

And by "mUxing" you mean "mIxing"

[pandy]

It is not clear what is your goal - or you trying to add to already existing video additional audio track that later during play out can be selected instead original or you trying to mix additional audio track to already existing so video will have single audio track that is combination of original and second?

[Igniz]

Yes... I need to mixing audio tracks.

[pandy]

https://ffmpeg.org/ffmpeg-filters.html#amix

[raffriff42]

Mix the tracks in Audacity. Mux the mix into your AVI with Avimux.
http://manual.audacityteam.org/man/mixing.html

[Igniz]

Too difficult to use ffmpeg.

[Igniz]

Audio tracks are already inside avi. I do not have to put them in the video. Enough, I give up. Programs of shit.

[pandy]

Ok, you need to start provide details - honestly - every new comment you release a bit of information that changing overall picture.

[Igniz]

I have an avi file recorded with Bandicam, with two audio tracks. I would like to lower the sound in the first audio track, and then mix it with the second in the same video.

[pandy]

I have an avi file recorded with Bandicam, with two audio tracks. I would like to lower the sound in the first audio track, and then mix it with the second in the same video.

Format? Codecs?

[Igniz]

Video: H264 Audio: mpeg-1 L2

[jagabo]

Open the audio in Audacity (with the ffmpeg source plugin). Mix the two tracks as desired. Export as MP2 (or whatever codec you want). Mux the original video and the new audio with your favorite muxing tool, VirtualDubMod, AviMux, MKVToolNix, etc.

[Igniz]

Ok ... but how do I remove the audio from the video to open it with audacity?

[transporterfan]

Try dragging the video onto audacity.

[Igniz]

WORKS!!!!!! Really thanks to all!!!

[pandy]

Should work OK, download suitable ffmpeg for your OS, copy and paste bellow to some plain text editor (Notepad in Windows is fine) then save as batch (must have extension .bat or .cmd), drag & drop your source on this batch, ffmpeg must be located in same folder as batch.

ffmpeg -i "%1" -filter_complex "[0:a:0]dynaudnorm,volume=volume=-12dB[aout1];[0:a:1]dynaudnorm,volume=0.5[aout2];[aout1][aout2]amix=inputs=2:duration=longest:dropout_transition=2[aout]" -map 0:v:0 -c:v copy -map [aout]:a:0 -c:a:0 libmp3lame -q:a:0 4 "%~n1_out.mkv"

[Igniz]

Solved with Audacity!

[pandy]

Solved with Audacity!

You need mux it when provided batch will create already working file.

[Igniz]

I use Audacity to import audio tracks from the avi file. Lower the audio of the first track, then mix and save in mp2. Then use Avi-mux to insert it into the video file.

[pandy]

I use Audacity to import audio tracks from the avi file. Lower the audio of the first track, then mix and save in mp2. Then use Avi-mux to insert it into the video file.

Not my circus and not my monkeys but provided script take your source, video is copied unchanged, audio tracks are normalized by dynaudnorm filter to avoid significant level differences between tracks, level one of tracks (first) is reduced by constant factor (approx 4 times lower level than second audio - this can be easily changed), both tracks are mixed and output is compressed with way more popular mp3 codec, video and audio track are muxed to mkv container.
All above performed automatically and in repeatable way so it can be repeated multiple times. That's all.

[Igniz]

Don't works...

[pandy]

Don't works...

Works on my files...

[jagabo]

Too many unknowns. Did you put a copy of ffmpeg.exe in your \Windows\System32 folder? Or did you change the command line to reflect the full path to ffmpeg.exe? Like "C:\program files\ffmpeg\bin\ffmpeg.exe -i "%1..." -- or wherever ffmpeg is on your computer. What exactly are your audio tracks? Two mono tracks? One stereo track? Two stereo tracks? Two 5.1 tracks?