[FFmpeg-trac] #4000(undetermined:new): mpeg4: Magenta color shift in first GOP
FFmpeg
trac at avcodec.org
Fri Oct 3 09:55:57 CEST 2014
#4000: mpeg4: Magenta color shift in first GOP
-------------------------------------+-------------------------------------
Reporter: | Owner:
ErikCJohansson | Status: new
Type: defect | Component:
Priority: normal | undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by ErikCJohansson):
> How can I see in the histogram plots that frame 1 has a higher magenta
colour shift than frame 0?
The histogram each consists of three curves, one for each of R, G and B.
They are color coded as you would expect. In the histogram of the source
frame and frame 0, the peak around 900 has three separate peaks - one for
each of the plotted colors. In the histogram for frame 1 the blue and red
curves have been shifted to the right.
> How did you produce this histogram? Did you use libswscale (FFmpeg) for
the colour space conversion?
I used Baselight (www.filmlight.ltd.uk), libswscale not involved.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4000#comment:5>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list