[FFmpeg-user] How to speed up thumbnail generation for video files using FFMPEG on MIPS

Carl Eugen Hoyos cehoyos at ag.or.at
Mon Jul 9 13:33:22 CEST 2012

Pavan Kulkarni <pavanvkbgm <at> gmail.com> writes:

> time ./ffmpeg -ss 18 -i Pirates_remux_short.ts  -an -s 150x100 thumb12.jpg

To elaborate (I missed the scaling in your first mail):
libswscale does not contain optimizations for mips, so 
scaling is expensive.
If you are an experienced mips asm developer, optimizing libswscale 
is definitely possible and many operations would gain speed, 
the alternative is to optimize the h264 decoder (which would 
also show benefits when decoding without scaling) or you 
optimize both;-)

Carl Eugen

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