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enter image description hereI have a number of Music Videos I am converting from DVD to MP4. Unfortunately I find the audio levels are all different. It is easy enough to get similar audio leves by using Audacity but would prefer to do the conversion AC3 to AAC at the same time then re-muxing to the video.

I have tried to write out AAC files in Audacity , using external ffmpeg conversion, but they only cause VLC to hang and do not play. I think this is because I do not know what to set the container to.

Any advice appreciated.

Tekno Geekz
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2 Answers2

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You can also use ffmpeg-normalize and run a batch conversion of all video MP4 files with:

ffmpeg-normalize *.mp4 -c:a aac -b:a 192k

This will keep the video and normalize the audio using EBU R 128 loudness normalization. It will encode the audio with ffmpeg's internal AAC encoder. The output will be written to a new directory called normalized. The output files will be using the MKV container and should be playable in VLC.

If you are on Windows, the *.mp4 wildcard will not work, see the README for an alternative loop option.

slhck
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Apparently Audacity will allow me to write out (without ffmpeg) a m4a container with AAC audio .No ffmpeg required. Hopefully ffmpeg will handle this format. It does seem the bitrate is fixed at 196

Tekno Geekz
  • 81