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9th August 2009, 07:55 | #1 | Link |
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Join Date: Nov 2008
Posts: 322
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splice speed
I am doing the simplest of operations and running into trouble.
I have two clips the first is a short (10sec) clip encoded with HUFFyuv. The second is a longer (25 min) yv12 clip which needs some de-noising. Simplified script: a=clip1.avi b=clip2.mpg a=a.converttoyv12() b=b.my de-noiser() a++b This gives me about 0.5-1 fps! If I remove clip1 from the equation and just de-noise clip2 the processing speed goes up to 3fps (the de-noiser is very slow!) Why is a short clip that receives no processing slowing the whole thing down? It must be something to do with HUFFyuv as I have tried encoding clip1 with XVID and it then runs at the faster speed of 3fps. Any thoughts? Thanks. |
9th August 2009, 08:02 | #2 | Link |
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Join Date: Oct 2001
Location: Germany
Posts: 7,259
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hdd throughput could be a reason for the slow down,... (especially if input&output files are on the same hdd)
for lossless compression files bitrate normally is rather high and hdd speed could matter,... |
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