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Forum Discussion
What exactly is transcoding?
Hi, I'm looking to dive into ReadyNAS and get all of my pictures and music somewhere central so they're shared across all of my devices. As a bonus, and something I don't do today, I'd also like t...
Apple uses m4a, m4p, mp4, and m4v as its extension for mp4.
PapaBear wrote: The few times I have forgotten to change it, I simply changed the extension and never had a problem. Some one more versed in all the video formats could probably tell what difference there is if any. I use .mp4 because it play nicely in Media Player.
Normally m4a is DRM-free, and m4p is not. Both are audio-only. Apple usually likes m4v for video (whether it has DRM or not). All of these (mp4, m4v, m4a, m4p) use the standard container format MP4 which is defined by MPEG/ISO.
BTW, most MP4 video players cannot deal with AC3 ("Dolby digital") in an MP4 container - this is an extension that Apple uses. So with Handbrake you need to be careful if you specify that audio.
MKV is totally different from MP4, and is not a true standard at all. It is based on an open source, but there is no standards body managing the specification. There are a lot of MKV files out there though, it is particularly popular for BluRay rips. AVCHD and MP4 might replace it over time, we will have to see.
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