I want to change the soundtrack of an MP4.
But if I open it in, say, Sony Vegas Pro, when I render it again in the same format, there's quality loss because I start with a lossy source. ( right ?)
Is there a way to simply swap the sound of an Mp4 file with another without touching the video ?
If so can you guys suggest me software ?
Thanks in advance ! I love how kind you all are to newbies like me.
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