[gstreamer-bugs] [Bug 163161] New: pngenc only supports video/x-raw-rgb,bits=24,depth=24

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 http://bugzilla.gnome.org/show_bug.cgi?id=163161
 GStreamer | gst-plugins | Ver: HEAD CVS

           Summary: pngenc only supports video/x-raw-rgb,bits=24,depth=24
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: algernon at bonehunter.rulez.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
                CC: all-bugs at bugzilla.gnome.org


gst-launch filesrc location=png-with-alpha.png ! pngdec ! pngenc ! filesink
location=foo.png

This will not work, as pngenc cannot negotiate with pngdec. If I add an !
alphacolor ! ffmpegcolorspace after pngdec, the file gets saved, but is skewed
(because - imo - it really is 32bits, but pngenc treats it as if it were 24 only)

Looking at ext/libpng/gstpngenc.c, I think I may be able to come up with a patch
soonish.

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