I would like to replace the audio of an MP4 video with another aac audio file and split the video.
I tried to do it with AviDemux but for some reason it keeps crashing. Then, I tried with VirtualDub2 but I get the message that I must choose another input driver.
What am I missing? Is there some other (free) tool to do this?
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AAC? Isn't that Apple? What you're missing is that AAC is proprietary. You need to convert to non-Apple codec.
Once you get the audio straightened out....replace the audio and create a new file....THEN split the new file.
Don't make the software try to decide whether to wind it's butt or scratch it's watch.
The Mp4 video I have has already an aac sound. And I want to replace it with another one of the same format.
Ok, let's say that I break the whole process in two steps. Which tool should I use for each process?
With the tools I'm currently aware of, I'd use mkvtooknix to create an mkv with the streams I want,
then turn it back to an mp4 after it was done. The task shouldn't be this hard
These two methods will reencode?