[FFmpeg-trac] #6445(undetermined:new): Incorrect Video Levels in vf_colorspace

FFmpeg trac at avcodec.org
Sat Jun 10 01:59:18 EEST 2017

#6445: Incorrect Video Levels in vf_colorspace
             Reporter:  maweber      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0

Comment (by maweber):

 I hope I got this right?
 from the batch file:
 # Conclusion: ffmpeg version git-2017-06-09-9c6b982
 # vf_colorspace irange WILL override the input "-color_range",
 # vf_colorspace irange is not a factor.
 # vf_colorspace range will NOT override the output pix_fmt,
 # vf_colorspace range is a factor, will be multiplied by the pix_fmt
 levels of the encoder

 I'm not sure about the way to take it, as I tend to struggle with this
 kind of complexity.
 Somehow I expected the image beginning at vf to be normalized somehow. The
 file input params are very useful for GUIs and wrapping applications, so I
 guess the input params of colorspace are better not used when file input
 params are present. If using "lut3d" in the chain I guess it's recommended
 to prefix a vf_colorspace range to normalize it, and have consistent
 results... (?)

 That's as far as I can get for now, thanks anyways for a feedback.
 Have a good one,

Ticket URL: <https://trac.ffmpeg.org/ticket/6445#comment:5>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list