On 04/12/2010 09:57 PM, Alexander Larsson wrote:
I did some simple testing of the new mjpeg encoder.
Showing the youtube "will it blend - ipad" video i got quite better
compression (24k per frame average as opposed to 35k before), but the
code used a bit more cpu (9.8 msec per frame where it was 4.2 before). I
made a simple change in the libjpeg code to make it a bit faster, but we
might still be able to tweak this a bit in favour of performance rather
than compression if thats what we want.
Hi Alex,
Nice.
In client/mjpeg_decoder.cpp -> decode_data(), there is a code that memmove data
to the beginning of the buffer.
Do you think we can gain better performance by actually implementing _cinfo.src
functions ? This way we may be able to avoid (some) memory copying, e.g. by
using a circular-buffer (and modulo calculation) or maybe even with no internal
buffer.
Regards,
Uri.
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