i want to change Video Extension
any format to 3gp / Mp4 / mkv
Without Re-encoding
I have avidemux and video container Changer
that haven't 3gp option
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MKVMergeGUI
Video To Video Converter (use the Direct Stream Copy conversion preset) -
3gp and mp4 are essentially the same thing
They're each limited in the actual codecs they can contain. If you want to turn anything into an mkv without re-encoding you use MKVMerge.
MP4 generally only takes AAC audio (maybe AC-3) and mpeg video. It does take others but you're unlikely to find those other codecs in non-mp4 files.
Any format to mp4 without re-encoding is a hard ask, the source would have to contain the right codecs to begin with.
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