id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1702	Transparency information gets lost when converting from gray8a to rgba	cehoyos		"(Second part of ticket #769)
When converting from gray8a to rgba, the resulting picture is opaque.
{{{
$ ffmpeg -s 32x32 -pix_fmt gray8a -i gray8a.yuv -pix_fmt rgba out.png
ffmpeg version N-44015-g5e363bb Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 30 2012 10:41:45 with gcc 4.5.3 (GCC)
  configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
  libavutil      51. 70.100 / 51. 70.100
  libavcodec     54. 54.100 / 54. 54.100
  libavformat    54. 25.104 / 54. 25.104
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3. 14.100 /  3. 14.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
[rawvideo @ 0x1480400] Estimating duration from bitrate, this may be inaccurate
Input #0, rawvideo, from 'gray8a.yuv':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo (Y2[0][8] / 0x8003259), gray8a, 32x32, 25 tbr, 25 tbn, 25 tbc
Output #0, image2, to 'out.png':
  Metadata:
    encoder         : Lavf54.25.104
    Stream #0:0: Video: png, rgba, 32x32, q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> png)
Press [q] to stop, [?] for help
Truncating packet of size 2048 to 1
frame=    1 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.04 bitrate=   0.0kbits/s
video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead -100.000000%
}}}"	defect	closed	normal	swscale	git-master	fixed	gray8a alpha				1	0