This post explains how to convert a video file to use different codecs.
This can be useful, for example, where a given video player is unable to play a video with a specific codes.
How to check which Codecs are used on a video file
Open video file with VLC media player, go to menu bar > “Tools” > “Codec Information”.
The codec information will be displayed in a dialog.
Usually stream 1 refers to video codec while stream 2 refers to audio codec.
How to change Codecs used on a video file
Actually, codecs used on a video cannot be “changed”, but instead we can create a new file with a different codec.
Open video file with VLC media player, go to menu bar > “Convert / Save…” > Codec Information.
On tab “File”, click on “Add” and select file to be converted to add it to list.
Click on “Convert / Save” button.
Under the “Profile” field, select the desired codec profile (e.g. H.264 + MP3 (MP4))
Click on “Browse” on “Destination file” field.
Choose location for output file . Default container is .mp4, but you may change it.
Click on “Start”.
Click on “Play” and wait until it is completed.