[Bug 694078] New: avenc_huffyuv does not respect alpha channel

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=694078
  GStreamer | gst-libav | git

           Summary: avenc_huffyuv does not respect alpha channel
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-libav
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: vhdirk at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When encoding video/x-raw,format=BGRA to huffyuv, the alpha channel is always
blank.

This can be reproduced as follows:

* Take this huffyuv encoded rgba sample:
http://samples.mplayerhq.hu/V-codecs/HuffYUV/camera2_hfyu32.avi (as found here
https://ffmpeg.org/trac/ffmpeg/ticket/668)

* split of the alpha channel, and inspect that it is correct (it should be a
mask that refines the 'wobbly' edges of the source video):
avconv -i camera2_hfyu32.avi -vf "[in] format=rgba, split [T1], fifo,
lutrgb=r=minval:g=minval:b=minval,[T2] overlay [out]; [T1] fifo,
lutrgb=r=maxval:g=maxval:b=maxval [T2]" alpha.avi

* decode and re-encode to huffyuv:
 gst-launch-1.0 filesrc location=camera2_hfyu32.avi ! avidemux ! avdec_huffyuv
! avenc_huffyuv ! avimux ! filesink location=newcamera2_hfyu32.avi

* split of the alpha of newcamera2_hfyu32.avi. It is all blank.


Re-encoding with libav itself works as expected:
avconv -i camera2_hfyu32.avi -vcodec huffyuv out.avi

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.