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  1. Hi I just edited a video using aviutl. I know I can mux them using Mkv merge but I think that only output to mkv. If I want to mux the video and audio into MP4 is there any free software out there that will allow me to do so?
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  2. You can export an mp4 straight out of AviUtl. Why are you adding mkv merge into the process?
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  3. Member racer-x's Avatar
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    The audio should be in aac format, then you can use mp4box or ffmpeg to mux the streams into an mp4. If you need a GUI, you can use Yamb.
    Got my retirement plans all set. Looks like I only have to work another 5 years after I die........
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  4. Originally Posted by smrpix View Post
    You can export an mp4 straight out of AviUtl. Why are you adding mkv merge into the process?
    Because I sometimes notice the sound are mute or it's just off
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