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Adding a Sound Track to a Rendered Video
Hello, everyone:
I assume this question has been asked before, but I’ve searched and searched and can’t find an answer.
So…is it possible to add a soundtrack — say a voiceover — to an already-rendered video without re-rendering the video itself? I want to add an audio track to video, but as I understand it, as far as video goes, you’re only supposed to render once.
Thoughts?
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1 Reply
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Video and audio streams (and subtitles, etc..) in a video can be exported to seperate files and recombined without any re-encoding. It’s called muxing-demuxing.
You can use VirtualDub for that if your video file is in a type that it can handle.
Use “Direct Stream Copy” and “audio from another file…” to replace the audio, hit F7 to export as an AVI without re-encoding.
BTW, If you don’t need a permanent replacement, MediaPlayerClassic can replace audio on-the-fly. Just add the file in the same directory with the video, if the video has no audio track, it will use the separate audio file (having the same name with the video) as audio track. In case an audio stream already exist in the video, then you need to pick the file from “Right-click/Audio” menu.
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