[FFmpeg-trac] #4261(undetermined:new): Systematic artefacts from 10bit Source
FFmpeg
trac at avcodec.org
Fri Apr 17 16:38:37 CEST 2015
#4261: Systematic artefacts from 10bit Source
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Reporter: solidghost | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by solidghost):
Im sorry but my ffmpeg build cant use those "sdl" & "xv".
But I have testet your code below.
{{{
ffmpeg -i out.m2v -vf crop=100:100:0:0,scale=1000:1000 -qscale 2 -vframes
1 out.jpg
}}}
1: if you use the m2v-file that was coded from the 10 bit source using
"-dc 11" it will absolutely have artefacts.
2: if you use the same command but uses the 10 bit source instead of the
m2v file, that jpg will look clean.
Just compare those 2 jpg pictures. Its hard to see but the one from the
m2v-file, if you look very closely will look almost little green every
second column of pixels. And if you take both of these pictures to any
program that can measure pixel colour values you will see when dragging
your mouse over them that the one from the m2v-file will have color
changes. Small but still they are not constant as the other .jpg created
from the 10bit source mov.
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Ticket URL: <https://trac.ffmpeg.org/ticket/4261#comment:17>
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