specifying flags +ildct+ilme produce corrupted png

[verem]

Hi,

i noticed that producer png files with latest libavcodec has some artifacts.

to reproduce this behavior it is enough to specify flags +ildct+ilme,

creating broken png file:

[root@dev-5 libavcodec]# /usr/local/enctools/bin/ffmpeg -i /home/studio/Videos/TheCore/hd/meta/test0002.mov.png -flags +ildct+ilme -y /var/www/html/test_dv_pal_i.png
ffmpeg version N-38896-gf645132 Copyright (c) 2000-2012 the FFmpeg developers
  built on Mar 19 2012 17:38:21 with gcc 4.6.2 20111027 (Red Hat 4.6.2-1)
  configuration: --prefix=/usr/local/enctools --extra-cflags=-I/usr/local/enctools/include --extra-ldflags=-L/usr/local/enctools/lib --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-avfilter --enable-pthreads --enable-bzlib --enable-zlib --enable-libvo-amrwbenc --enable-libfaac --enable-libmp3lame --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
  libavutil      51. 42.100 / 51. 42.100
  libavcodec     54. 11.100 / 54. 11.100
  libavformat    54.  2.100 / 54.  2.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 65.101 /  2. 65.101
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  7.100 /  0.  7.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, image2, from '/home/studio/Videos/TheCore/hd/meta/test0002.mov.png':
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgb24, 720x576, 25 tbr, 25 tbn, 25 tbc
[buffer @ 0x13f0a20] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
Output #0, image2, to '/var/www/html/test_dv_pal_i.png':
  Metadata:
    encoder         : Lavf54.2.100
    Stream #0:0: Video: png, rgb24, 720x576, q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png -> png)
Press [q] to stop, [?] for help
frame=    1 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.04 bitrate=   0.0kbits/s
video:238kB audio:0kB global headers:0kB muxing overhead -100.000000%

creating correct png file:

[root@dev-5 libavcodec]# /usr/local/enctools/bin/ffmpeg -i /home/studio/Videos/TheCore/hd/meta/test0002.mov.png -flags +ildct+ilme -y /var/www/html/test_dv_pal_ni.png
ffmpeg version N-38896-gf645132 Copyright (c) 2000-2012 the FFmpeg developers
  built on Mar 19 2012 17:38:21 with gcc 4.6.2 20111027 (Red Hat 4.6.2-1)
  configuration: --prefix=/usr/local/enctools --extra-cflags=-I/usr/local/enctools/include --extra-ldflags=-L/usr/local/enctools/lib --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-avfilter --enable-pthreads --enable-bzlib --enable-zlib --enable-libvo-amrwbenc --enable-libfaac --enable-libmp3lame --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
  libavutil      51. 42.100 / 51. 42.100
  libavcodec     54. 11.100 / 54. 11.100
  libavformat    54.  2.100 / 54.  2.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 65.101 /  2. 65.101
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  7.100 /  0.  7.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, image2, from '/home/studio/Videos/TheCore/hd/meta/test0002.mov.png':
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgb24, 720x576, 25 tbr, 25 tbn, 25 tbc
[buffer @ 0x1256a20] w:720 h:576 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
Output #0, image2, to '/var/www/html/test_dv_pal_ni.png':
  Metadata:
    encoder         : Lavf54.2.100
    Stream #0:0: Video: png, rgb24, 720x576, q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png -> png)
Press [q] to stop, [?] for help
frame=    1 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.04 bitrate=   0.0kbits/s
video:238kB audio:0kB global headers:0kB muxing overhead -100.000000%

[verem]

corrupted output

[verem]

normal output

[verem]

source file

[cehoyos]

Could you explain how you encoded the correct file?
(The command lines and output above look identical to me.)

[cehoyos]

Regression since fd8a83.

[michael]

locally fixed, wil be in my next git push