#75(avcodec:new): Chroma corruption with specific Fraps sample
#75: Chroma corruption with specific Fraps sample --------------------------+--------------------- Reporter: Snowknight26 | Type: defect Status: new | Priority: normal Component: avcodec | Version: git Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | --------------------------+--------------------- With a specific sample (http://stfcc.org/misc/fraps_chroma_corruption.avi - ~48MB), chroma corruption is produced on at least two different frames after the decoding process. With the same frame, note the difference between FFmpeg's output and the Fraps video decompresser's: FFmpeg: http://stfcc.org/misc/fraps_chroma_corruption_ffmpeg.png Fraps: http://stfcc.org/misc/fraps_chroma_corruption_fraps.png Below output was for converion to huffyuv so it could be viewed in ffplay (ffplay doesn't display video for Fraps it seems): {{{ C:\temp\Encoding\test>ffmpeg.exe -v 9 -loglevel 99 -i fraps_chroma_corruption.avi -vcodec huffyuv -pix_fmt rgb32 -y output.avi FFmpeg version git-N-29181-ga304071, Copyright (c) 2000-2011 the FFmpeg developers built on Apr 18 2011 21:24:03 with gcc 4.5.2 configuration: --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-memalign-hack --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable- libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable- libxvid --enable-zlib --cross-prefix=i686-w64-mingw32- --target-os=mingw32 --arch=x86_32 --extra-cflags=-I/home/kyle/software/ffmpeg/external- libraries/win32/include --extra-ldflags=-L/home/kyle/software/ffmpeg /external-libraries/win32/lib --pkg-config=pkg-config libavutil 50. 40. 1 / 50. 40. 1 libavcodec 52.120. 0 / 52.120. 0 libavformat 52.108. 0 / 52.108. 0 libavdevice 52. 4. 0 / 52. 4. 0 libavfilter 1. 79. 0 / 1. 79. 0 libswscale 0. 13. 0 / 0. 13. 0 [NULL @ 018BBE60] Probed with size=2048 and score=100 [avi @ 018BBE60] All info found Input #0, avi, from 'fraps_chroma_corruption.avi': Duration: 00:00:01.51, start: 0.000000, bitrate: 260416 kb/s Stream #0.0, 1, 1/60: Video: fraps, bgr24, 960x540, 1/60, 60 tbr, 60 tbn, 60 tbc [buffer @ 01747A30] w:960 h:540 pixfmt:bgr24 [ffsink @ 01747C30] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out' [scale @ 01747E90] w:960 h:540 fmt:bgr24 -> w:960 h:540 fmt:bgra flags:0x4 [huffyuv @ 01751A70] using huffyuv 2.2.0 or newer interlacing flag Output #0, avi, to 'output.avi': Metadata: ISFT : Lavf52.108.0 Stream #0.0, 0, 1/60: Video: huffyuv, bgra, 960x540, 1/60, q=2-31, 200 kb/s, 60 tbn, 60 tbc Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding frame= 91 fps= 60 q=0.0 Lsize= 70979kB time=1.52 bitrate=383378.5kbits/s video:70971kB audio:0kB global headers:0kB muxing overhead 0.010824% }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/75> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#75: Chroma corruption with specific Fraps sample -------------------------+---------------------- Reporter: Snowknight26 | Owner: Type: defect | Status: open Priority: normal | Component: avcodec Version: git | Resolution: Keywords: fraps | Blocked By: Blocking: | Reproduced: 1 Analyzed: 0 | -------------------------+---------------------- Changes (by cehoyos): * keywords: => fraps * status: new => open * reproduced: 0 => 1 Comment: Three frames attached, they play fine with mplayer -vc fraps, ffmpeg shows blue artefacts for the first and third frame. {{{ ffmpeg -v 9 -loglevel 99 -i fraps_artefacts.avi out%1d.png FFmpeg version git-N-29241-gddb00ad, Copyright (c) 2000-2011 the FFmpeg developers built on Apr 20 2011 11:37:48 with gcc 4.4.5 configuration: --cc='/usr/local/gcc-4.4.5/bin/gcc -m32' --disable-asm libavutil 51. 0. 0 / 51. 0. 0 libavcodec 53. 0. 0 / 53. 0. 0 libavformat 53. 0. 0 / 53. 0. 0 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 0. 0 / 2. 0. 0 libswscale 0. 13. 0 / 0. 13. 0 [NULL @ 0x8c64390] Format avi probed with size=2048 and score=100 [avi @ 0x8c64390] All info found Input #0, avi, from 'fraps_artefacts.avi': Metadata: encoder : Lavf53.0.0 Duration: 00:00:00.05, start: 0.000000, bitrate: 329638 kb/s Stream #0.0, 1, 1/60: Video: fraps, bgr24, 960x540, 1/60, 60 tbr, 60 tbn, 60 tbc Incompatible pixel format 'bgr24' for codec 'png', auto-selecting format 'rgb24' [buffer @ 0x8c65ce0] w:960 h:540 pixfmt:bgr24 [ffsink @ 0x8c65f30] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out' [scale @ 0x8c6a4f0] w:960 h:540 fmt:bgr24 -> w:960 h:540 fmt:rgb24 flags:0x4 Output #0, image2, to 'out%1d.png': Metadata: encoder : Lavf53.0.0 Stream #0.0, 0, 1/90000: Video: png, rgb24, 960x540, 1/60, q=2-31, 200 kb/s, 90k tbn, 60 tbc Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding frame= 3 fps= 0 q=0.0 Lsize= -0kB time=0.05 bitrate= -3.5kbits/s video:3255kB audio:0kB global headers:0kB muxing overhead -100.000660% }}} -- Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/75#comment:1> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#75: Chroma corruption with specific Fraps sample -------------------------+---------------------- Reporter: Snowknight26 | Owner: Type: defect | Status: open Priority: normal | Component: avcodec Version: git | Resolution: Keywords: fraps | Blocked By: Blocking: | Reproduced: 1 Analyzed: 0 | -------------------------+---------------------- Comment (by reimar): There seems to be some extra data in the first plane, skipping e.g. the first 13 VLC values significantly improves the image. All the broken frames start with very peculiar VLC-decoded data: Frame 54: 1a 1 1 0 1 fd 1 1 1 2 0 ff 1 1 1 ff 2 0 1 0 Frame 59: 4e 1 1 0 1 ff 1 1 1 1 0 fb a 0 4 0 3e 3d 3f 3e Frame 61: 98 1 1 0 ff 0 0 1 1 1 1 0 1 ff 1 1 1 1 1 1 Frame 62: 90 2 0 ff 1 0 1 1 1 1 0 ff 1 ff 5 ff 1 1 1 2 There might be an issue in the huffman table generation. For example removing FF_HUFFMAN_FLAG_ZERO_COUNT reduces the issues, but causes issues with many other frames. -- Ticket URL: <http://ffmpeg.org/trac/ffmpeg/ticket/75#comment:2> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
#75: Chroma corruption with specific Fraps sample --------------------------------------+----------------------------------- Reporter: Snowknight26 | Owner: Type: defect | Status: closed Priority: normal | Component: avcodec Version: git | Resolution: fixed Keywords: fraps | Blocked By: Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | --------------------------------------+----------------------------------- Changes (by cehoyos): * status: open => closed * resolution: => fixed Comment: Fixed by Michael. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/75#comment:3> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker
participants (1)
-
FFmpeg