[FFmpeg-trac] #225(swscale:reopened): Converting from YUVJ to YUV lose contrast

[FFmpeg]

#225: Converting from YUVJ to YUV lose contrast
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             Reporter:  sghpunk      |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:  swscale
              Version:  git-master   |               Resolution:
             Keywords:  YUV/YUVJ     |               Blocked By:
  contrast                           |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Changes (by KlausW):

 * cc: sxxe@… (added)


Comment:

 Hi,
 i have the same problem of contrast loss as described here.
 It happens while using the delogo and vidstabtransform filters (They do
 the color space conversion).

 So far i was able to skirt the problem by using the mplayer filter
 "mp=eq=0:0".
 The "trick" is mentioned above.

 Sadly with the latest ffmpeg (2.6) release this mplayer filter does not
 exists anymore, it's now a native filter "eq" which acts totally different
 and can not be used to skirt the problem anymore. (At least i was not able
 to figure out how)

 Does anyone know how else i could avoid the contrast loss?

 kind regards,
 Klaus

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Ticket URL: <https://trac.ffmpeg.org/ticket/225#comment:25>
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