[FFmpeg-user] preserving YUV color range of 0-255
dave at dericed.com
Sat Mar 8 18:32:11 CET 2014
On March 8, 2014 at 9:03:58 AM, Carl Eugen Hoyos (cehoyos at ag.or.at) wrote:
Dave Rice <dave <at> dericed.com> writes:
> encoder : Lavf55.19.102
> Duration: 00:00:00.03, start: 0.000000, bitrate: 164836 kb/s
> Stream #0:0(eng): Video: rawvideo (2vuy / 0x79757632), uyvy422
How did you produce the sample?
This is how I made it: http://github.com/dericed/testpatterner/blob/master/sampler#L2-L26
The reason that I made it is that I’m capturing video from analog sources through a decklink device to uyvy422 and v210. The process results in some Y values in the 0-16 and 235-255 range and I made the test pattern in order to test whether the histogram filter is accurately showing these full range values. In the case of the histogram filter it does plot the higher and lower values but some filters such as extractplanes change the range of the input.
I wonder if uyvy422 isn't supposed to be MPEG-range,
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