Opened 13 years ago
Closed 13 years ago
#842 closed defect (fixed)
ljpeg decodes incorrectly
Reported by: | ami_stuff | Owned by: | |
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Priority: | normal | Component: | avcodec |
Version: | unspecified | Keywords: | mjpeg ljpeg |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | yes | |
Analyzed by developer: | no |
Description
ftp://65.66.246.92/pub/GraphicsMagick/delegates/ljpeg-6b.tar.gz
C:\>ffmpeg -i testimgl.jpg out.bmp ffmpeg version N-36193-gf514695, Copyright (c) 2000-2011 the FFmpeg developers built on Dec 26 2011 17:50:37 with gcc 4.6.2 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger - -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable- libxvid --enable-zlib libavutil 51. 33.100 / 51. 33.100 libavcodec 53. 48.100 / 53. 48.100 libavformat 53. 28.100 / 53. 28.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 54.100 / 2. 54.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 5.100 / 0. 5.100 libpostproc 51. 2.100 / 51. 2.100 Input #0, image2, from 'testimgl.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: N/A Stream #0:0: Video: mjpeg, bgr24, 227x149, 25 tbr, 25 tbn, 25 tbc [buffer @ 020F1820] w:227 h:149 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param: Output #0, image2, to 'out.bmp': Metadata: encoder : Lavf53.28.100 Stream #0:0: Video: bmp, bgr24, 227x149, q=2-31, 200 kb/s, 90k tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mjpeg -> bmp) Press [q] to stop, [?] for help frame= 1 fps= 0 q=0.0 Lsize= 0kB time=00:00:00.04 bitrate= 0.0kbits/ s video:100kB audio:0kB global headers:0kB muxing overhead -100.000000%
Attachments (1)
Change History (4)
by , 13 years ago
Attachment: | testimgl.jpg added |
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comment:1 by , 13 years ago
comment:2 by , 13 years ago
Component: | undetermined → avcodec |
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Keywords: | mjpeg ljpeg added |
Summary: | jpeg lossless decodes incorrectly → ljpeg decodes incorrectly |
My suspicion is that the sample does not confirm to the latest specification...
(And remember that there is "jpeg lossless" - "loco" - and "ljpeg", they are not compatible at all.)
comment:3 by , 13 years ago
Reproduced by developer: | set |
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Resolution: | → fixed |
Status: | new → closed |
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Color depth: 24bpp
Mode: Lossless
Bits per sample: 8
Samples per pixel: 3
Subsampling: 1:1:1 (11:11:11)
Interleaved: Yes
Color space: RGB
Lossless Predictor: 4
Lossless Point Transform: 1
Compression: Huffman