How To Convert An .mkv file To .mp4 File


How to convert an .mkv file to .mp4 file using the commandline in Debian 9 Stretch.

If you need to convert a video file from a Matroska container into the mp4 container, do one of the following.

Although, the second option worked best for me and was many times faster, the first option could work better for you.

Thus I am leaving it as an option.

Open a terminal window and type the following command:

sudo apt-get install libav-tools

Press Enter,

How To Convert An .mkv file To .mp4 File.

Now copy and paste the following command, but don't forget changing the input.mkv and output.mp4 names.

avconv -i inputfile.mkv -ar 22050 outputfile.mp4

Press Enter,

Note: This conversion can take more than an hour to complete, thus this is not my preferred tool.

Alternative using FFMPEG, assuming you are in the correct directory of the file you want to convert.

NOTE: If you don't use the copy codec, it will reencode and lose quality.

Type the following command:

ffmpeg -i input.mkv -codec copy output.mp4

Press Enter,

This worked better than using avconv in Debian 9 Stretch and was done in a matter of minutes, without loss of quality.

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