Coda: imx53 plays video with incorrect colors

[Fabio Estevam]

Hi Nicolas,

On Sat, Jan 16, 2021 at 11:46 PM Nicolas Dufresne <nicolas at ndufresne.ca> wrote:

> Perhaps you would explain in detail what isn't color correct ? To debug this,

Here is the movie showing the incorrect colors:

https://www.dropbox.com/s/a4ifivpoi663dkd/mx53.mp4?dl=0

The original video is this one:
http://cdn.clipcanvas.com/sample/clipcanvas_14348_offline.mp4

Please note that the color mismatch is not related to this specific
video sample.
It happens with all videos I have tried.

> you probably want to inspect the caps and the colorimetry negotiated between
> each element (use -v in gst-launch-1.0). It's quite possible that the decoder is
> ignoring upstream colors and get badly hinted by the driver, or that kmssink is
> pnot passing colorimetry to the driver.

Here is the -v output:

# gst-launch-1.0 -v filesrc location=/media/clip.mp4 ! qtdemux !
h264parse ! v4l2h264dec ! kmssink
Setting pipeline to PAUSED ...
[   15.113196] msm msm: [drm:adreno_request_fw] loaded
qcom/yamato_pm4.fw from new location
[   15.124377] msm msm: [drm:adreno_request_fw] loaded
qcom/yamato_pfp.fw from new location
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstKMSSink:kmssink0: display-width = 1024
/GstPipeline:pipeline0/GstKMSSink:kmssink0: display-height = 576
/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps =
video/x-h264, stream-format=(string)avc, alignment=(string)au,
level=(string)3.1, profile=(string)main,
codec_data=(buffer)014d401fffe10
023674d401f967200800936028100000e100002bf203460016e40016e45ef7c1e1108a24001000468de3c80,
width=(int)1024, height=(int)576, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps =
video/x-h264, stream-format=(string)byte-stream, alignment=(string)au,
level=(string)3.1, profile=(string)main, width=(int)1024, height=(
int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1,
chroma-format=(string)4:2:0, bit-depth-luma=(uint)8,
bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/v4l2h264dec:v4l2h264dec0.GstPad:sink: caps =
video/x-h264, stream-format=(string)byte-stream, alignment=(string)au,
level=(string)3.1, profile=(string)main, width=(int)1024,
height=(int)576, pixel-aspect-ratio=(fraction)1/1,
framerate=(fraction)25/1, chroma-format=(string)4:2:0,
bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/v4l2h264dec:v4l2h264dec0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)1024, height=(int)576,
interlace-mode=(string)progressive, multiview-mode=(string)mono,
multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)jp
eg, colorimetry=(string)bt601, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstKMSSink:kmssink0.GstPad:sink: caps =
video/x-raw, format=(string)I420, width=(int)1024, height=(int)576,
interlace-mode=(string)progressive, multiview-mode=(string)mono,
multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
pixel-aspect-ratio=(fraction)1/1,
chroma-site=(string)jpeg,colorimetry=(string)bt601,
framerate=(fraction)25/1
Pipeline is PREROLLED ...0 %)
Setting pipeline to PLAYING ...
New clock: GstSystemClock

Any adjustment I need to do in the Gstreamer pipeline to negotiate the
correct colors to the display?

Thanks