Re: questions and results from the video irc meeting
On Sat, 11 Jun 2005 11:06:40 +0200, Holger Levsen <debian@layer-acht.org> wrote:
The pegasos are PPC -- encoding with them will be painful. Even humble
x86s will be a better deal :p
so we (video...) won't have a use for them at all ?
Not for encoding, but editing might work.
<weird idea>
Using Pagasos machines for off-line¹ editing of stuff that mostly
requires straight cuts (no effects) and audio level fine-tuning.
If Cinelerra is used all the way, the Edit Decision List can be
passed on to a hunky rendering server.
</weird idea>
The idea is not all that weird. Cinelerra uses XML files pointing
to the original media files, and those file names can be string-
replaced with a lower resolution version. E.g. half-res MJPEG.
I am experimenting with 3rd-res MJPEG working copies to edit HDV
footage (HDTV resolution) on my laptop.
/home/user/video/day/talk/orig/timestamp_name.mov
...could be replaced by...
/home/user/video/day/talk/lowres/timestamp_name.mov
...and the project resolution setting changed accordingly.
Once the cutting is done, the file names and the setting can
be switched back (string replacement script) and rendering
can commence. If there were no effects or transitions added,
the video will be streamcopied, which is fast no matter the
CPU.
DV to MJPEG encoding is faster than real time on any modern
x86. Most of the CPU time goes to decoding the DV stream.
Have anyone tried running Cinelerra on the Pegasos? How
well does a 384x288 MJPEG video play back in Cinelerra? Full
framerate, with instant start/stop/backward/forward/slowmo?
¹Not working on the full-res original
--
Herman Robak
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