[gstreamer-bugs] [Bug 451908] [ffmpegcolorspace] regression: doesn't accept GST_VIDEO_CAPS_RGBA

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: HEAD CVS




------- Comment #2 from Jan Schmidt  2007-06-29 15:59 UTC -------
So, the problem is triggered by the acceptcaps changes in core, but caused by a
mismatch in the pad caps pngdec uses for RGBA versus ffmpegcolorspace:

/pipeline0/pngdec0.src: caps = video/x-raw-rgb, width=(int)1501,
height=(int)391, bpp=(int)32, framerate=(fraction)0/1, depth=(int)32,
endianness=(int)4321, red_mask=(int)-16777216, green_mask=(int)16711680,
blue_mask=(int)65280, alpha_mask=(int)255

This is "RGBA"

ffmpegcolorspace has:

      video/x-raw-rgb
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
              framerate: [ 0/1, 2147483647/1 ]
                    bpp: 32
                  depth: 32
               red_mask: 65280
             green_mask: 16711680
              blue_mask: -16777216
             alpha_mask: 255
             endianness: 4321

which is "BGRA".

If I hack ffmpegcolorspace to have the same masks as pngdec, it produces the
attached image as output which is obviously not correct but seems to have the
right colours, implying that the pngdec masks are right, and ffmpegcolorspace's
are currently not, we just never noticed because it was accepting the caps
anyway?


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