transcoding example?

_______0 · Guru Joined: 15 Oct 2012 Posts: 521

hi,

I understand by transcoding that a new media file isn't created but re-encoded on the fly and streamed to other devices. For instance rather than having to re-encode a bluray movie to a phone format what transcoding does is re-formating without saving the file. Am I right?

If so, anyone got a quick example how to do this?

thanks

audiodef · Watchman Joined: 06 Jul 2005 Posts: 5791

Transcoding is the process of decoding one format and re-encoding in another. You can either do this from one file to another, or from one file to a stream.

If you just want to re-encode a blu-ray into another format, ffmpeg will probably do this. I don't have any examples, though, since I use it rarely myself.
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John R. Graham · Posted: Thu May 23, 2013 2:57 pm Post subject:

Transcoding is more than merely format conversion. It also includes scaling and frame rate conversion.

- John
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audiodef · Watchman Joined: 06 Jul 2005 Posts: 5791

Indeed.

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jasn · Guru Joined: 05 May 2005 Posts: 427 Location: Maryland, US

..and if it's an encrypted bluray dvd, then you will also need to decrypt the contents, before the de-coding and then re-coding process. There's a good bluray howto Gentoo forum thread here, you can check out for more detailed info.

Good Luck..