[mythtv-users] Slow, slow, slow transcode

Robert Tsai mythtv at tsaiberspace.net
Mon Dec 4 04:01:55 UTC 2006

On Sun, Dec 03, 2006 at 06:33:09PM -0800, Pete Cap wrote:
> I transcoded a video today using FFMPEG--took around 3 hours for a
> 2-hour video and the quality was just awful.  So I tried again using
> transcode and DivX, same properties.  I guess I should have read up
> on multi-pass transcoding before trying, but I just noticed it
> entered the "final pass" after 6 hours of processing...it has
> another 7 to go.
> So, I have maybe 20 shows I want to transcode so as to free up some
> space.
> Is there ANY way to speed up this process?  The computer is not
> great--is a 2.4ghz Celeron with 2 gigs of RAM--maybe getting a
> beefier processor?  More RAM?  ANYTHING?

I just use the built-in mythtranscode. On my machine (Ubuntu64 on
Athlon64 3500+ Winchester running slowly at 1.0GHz) transcoding 1080i
HD down to 720x480 or so at 3300kbps takes about 2x real-time (2 hrs
to transcode a 1-hr recording); 720p HD takes about 3x real-time (same
transcoding parameters).

I haven't seen a need to play around with ffmpeg or transcocde.


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