[PD] gem codec basic review

Max Neupert abonnements at revolwear.com
Sun Dec 2 17:03:56 CET 2007

Am 02.12.2007 um 16:35 schrieb Andrew Brouse:
> If you want to do any scrubbing, varispeed or playing backwards of the
> video, you need a CODEC which does not use temporal compression.
> Photo-JPEG is in fact a very good choice in this case and if  
> compressed at
> 320 X 240 you get a good balance of file-size, picture quality and
> processor load. JPEG 2000 should also be a good choice (supported by
> QuickTime and there are libraries which support it on Linux but not  
> sure
> if it will play in GEM).

hi andrew,

i wonder if the photo-jpeg compression does introduce a jitter in the  
decoding speed depending on the complexity of the content. gem would  
need a different time to decode each time a different frame is called.
i am working now with 1024x768 video compressed with 75% quality  
photojpeg and sometimes see lags in the decoding.. but maybe it's  
just my imagination.


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