Good day! I'm looking for MKVToolNix equivalent software for .MP4's. I will use it in a video file without subtitles, I'll find it's subtitle and merge it with the video file just like what I did in MKVToolNix. Thanks!
Muxing a file simply means to extract individual streams out of existing container files or mix existing streams together into a new container file. For MP4, this can be done with ffmpeg and the
-c copy switch. If you don't want to write command line inputs, XMedia Recode is a good, free GUI for ffmpeg. There's a documentation on the website, simply select Direct Stream Copy to avoid reencoding the individual streams.
dmMediaConverter is very similar to MKVToolnix.
It is just a
ffmpeg gui, so it can save in any format.
To replicate the described MKVToolnix use, select "Convert", then "Add files", selecting both video and subtitles.
Check "Enabled" to keep the stream, uncheck to remove it.
Check "Copy" to keep the stream as it is, uncheck to trasnscode it.