[PD] recommended video codec

[etienne deleflie]

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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