The following are steps I am doing mainly for the purpose of increasing the volume, bass and treble of video files:
1. Record to MP3 the audio part. Then using Audacity, amplify and increase bass and treble. Then export as MP3 again.
2. Using a video editor, I mute the original audio, add the adjusted music, then render.
Is there a step whereby I can avoid rendering? I read something about demux/remux. Will it be faster and work in my case? It's mostly avi and MP4 files. Thanks.
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Get the ffmpeg source plugin for Audacity. Then you can import audio directly from your source files.
Use a muxer like VirtualDub (Video -> Direct Stream Copy mode, Audio -> Audio From Another File) or Mp4Muxer to mux your new audio with the original video. -
Thanks, Jagabo. I'll try that. (I hope you were not affected by the recent brush fire.)
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The ffmpeg worked but virtual dub and mp4muxer cannot open my file.
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I finally opened the mp4 file. I add the newly edited audio then deleted the track of the old audio then I hit "multiplex." The resulting file only has audio and NO video. I'll try your new suggestion (if I can figure it out how), then post the result later. Thanks.