[mythtv-users] Transcoding 101
jedi at mishnet.org
Sat Aug 2 01:42:25 UTC 2008
On Fri, Aug 01, 2008 at 09:51:37PM +0000, moodyjunk at frontiernet.net wrote:
> Before going through the bother of setting up transcoding I need some
> basic information comparing MPEG-2 to MPEG-4 and can't seem to find it
> on the web. I'm all for saving space, but I want a loss-less recording.
> 1) Does transcoding from MPEG-2 (HD cable) to MPEG-4 reduce the
> quality of the recording?
> 2) How much space does it save? 10%, 50%?
It all depends on how much quality you are willing to sacrifice.
You can easily increase your effective space by 2x or 4x.
> 3) Can MPEG-4 recordings be played via MythTV Watch Recordings?
You might want to be more precise than just "MPEG4" but yes,
MythTV has no problem playing compressed recordings.
> Just out of curiosity once transcoded do I need to re-commercial flag
> (don't know if the tags are offsets into the files or even direct
> cylinder/head/block addresses)?
Nope. No need to reflag.
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