[FFmpeg-trac] #2275(avcodec:new): artifacts on decoding PNG file with alpha
FFmpeg
trac at avcodec.org
Mon Feb 18 01:22:07 CET 2013
#2275: artifacts on decoding PNG file with alpha
--------------------------------------+-----------------------------------
Reporter: saste | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Keywords: png alpha
Blocked By: | Blocking:
Reproduced by developer: 1 | Analyzed by developer: 0
--------------------------------------+-----------------------------------
Summary of the bug:
How to reproduce:
{{{
fmpeg -i http://ffmpeg.org/ffmpeg-logo.png out.bmp
ffmpeg version N-50039-g9cfe7a3 Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 17 2013 13:21:08 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
configuration: --enable-pic --enable-fontconfig --enable-libschroedinger
--enable-libass --enable-version3 --prefix=/home/stefano --enable-libx264
--enable-libfaac --disable-shared --enable-static --enable-debug=3
--enable-pthreads --enable-libvorbis --enable-gpl --enable-nonfree
--enable-libmp3lame --enable-libtheora --enable-gpl --enable-x11grab
--enable-frei0r --enable-libspeex --enable-libcaca --enable-libflite
--enable-libfreetype --enable-libopencv --enable-libopencore-amrnb
--enable-libopencore-amrnb --disable-optimizations
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.100 / 54. 63.100
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 38.103 / 3. 38.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, image2, from 'http://ffmpeg.org/ffmpeg-logo.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgba, 396x100, 25 tbr, 25 tbn, 25 tbc
Output #0, image2, to 'out.bmp':
Metadata:
encoder : Lavf54.63.100
Stream #0:0: Video: bmp, bgra, 396x100, q=2-31, 200 kb/s, 90k tbn, 25
tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> bmp)
Press [q] to stop, [?] for help
frame= 1 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
video:155kB audio:0kB subtitle:0 global headers:0kB muxing overhead
-100.013884%
}}}
or alternatively:
{{{
ffplay http://ffmpeg.org/ffmpeg-logo.png
}}}
The output is garbled.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2275>
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