chris clepper wrote:
Try Photo-JPEG if available. Also, those CPU numbers look really high to me. Maybe something is not configured optimally?
it feels that way ... but the question is what ... are there performance parameters to pdp ?
I have re-compiled, from scratch, the latest versions of libquicktime, pdp and pidip .... (as well as ffmpeg)
... and I have also tried photo-JPEG which yields similar results to motion jpeg A ...
Etienne
cgc
On Jun 21, 2005, at 9:44 PM, etienne deleflie wrote:
Hi all,
I am in the throws of tetsing dozens and dozens of video codecs to find the one that is the most "right".
I want to decode 30 minutes of video (no sound) at 25fps (no dropped frames) at 640 x 280... from a 10gig scsi hard drive.... decoding must take up no more than around 30% CPU on a 2ghz processor (need the rest for audio)
codec must have no frame differenceing for fast access to sepcific frames... revers playback etc.
I'm using PDP .... which does yuv422 planar. ......
- mjpeg A (as encoded by transcode) chews 65% cpu
- mjpeg B (as encoded by Premiere) chews around 50% cpu
- component video (packed yuv422) chews around 30% cpu (acceptible)
but takes up too much hard drive space
- planar 4:2:0 is good ... its the closest ..... chews 25% cpu ,
takes less hard drive than component but still too much hard drive.
theora is yuck, sorenson too much cpu, divx is small, fast and reasonable quality ....... but all these have frame differencing.
indeo 3 is poor quality but decode is very fast.... cant read indeo 4+ on linux (I think it is frame differencing anyway)
cinepak would do it, ..fast decode... but very poor quality.
.... any suggestions? ........... anyone found a mjpeg compressor that deocdes really fast?
does anyone know of a codec that is PLANAR .... but compresses each Y U and V plane? ..... something like that would be real fast for pdp.
etienne
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