HandBrake

Thank you @Rodeo. Can you tell me the name of one of these tools?

Thank you @Rodeo. Are there any workaround to obtain the Stereo? For example, can I duplicate the Mono track to build a Stereo track?

Or the only solution to join all my videos would be to "downmix to Mono all of them"?

Thank you

Description of problem or question: Hello. I'm a novice user and I have a simple problem. I have several small family videos recorded with several devices (Android phone, iphone, digital camera, ...) at different resolutions, diferent audio tracks, etc. and I want to convert all of them to a same f...