[FFmpeg-trac] #3794(swscale:new): SWSCALE: Quantization Errors in Y Studio Range
FFmpeg
trac at avcodec.org
Wed Jul 23 10:28:48 CEST 2014
#3794: SWSCALE: Quantization Errors in Y Studio Range
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Reporter: troy_s | Owner:
Type: defect | Status: new
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by cehoyos):
* keywords: 709 Y luma =>
Comment:
There is something that I don't understand about this ticket (which in
reality doesn't matter since I won't be fixing the issue):
Your command line outputs a raw yuv file. If there is something wrong with
this file, I would expect you to write "the third pixel from the left has
input value x:y:z, FFmpeg outputs a:b:c instead of the expected y:u:v" or
"all pixels are 2% too bright" or "the dynamics are all off as in...".
Instead you attached rgb24 images: How can they be used to check yuv
values?
This is apart from the fact that I wonder if pal8 as an input format
(instead of rgb24 and/or bgr24) may have its own subtle issues.
(This reminds me that there is ticket #979 about different output values
depending on the input being rgb24 or bgr24.)
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Ticket URL: <https://trac.ffmpeg.org/ticket/3794#comment:3>
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