#28: Encoding mpeg-4 with threads and b-frames outputs errors on decoding ----------------------+--------------------- Reporter: cehoyos | Owner: michael Type: defect | Status: new Priority: normal | Component: avcodec Version: git | Keywords: Blocked By: | Blocking: Reproduced: 0 | Analyzed: 0 ----------------------+--------------------- With this sample, at least four threads are necessary to trigger an error on decoding, three is enough for other samples (that trigger different errors on decoding). {{{ $ ./ffmpeg -i fate-suite/svq3/Vertical400kbit.sorenson3.mov -threads 4 -bf 1 -an -qscale 5 out.avi FFmpeg version git-N-28683-g2007c1b, Copyright (c) 2000-2011 the FFmpeg developers built on Mar 28 2011 23:49:16 with gcc 4.5.2 configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl libavutil 50. 40. 0 / 50. 40. 0 libavcodec 52.116. 0 / 52.116. 0 libavformat 52.103. 0 / 52.103. 0 libavdevice 52. 3. 0 / 52. 3. 0 libavfilter 1. 76. 0 / 1. 76. 0 libswscale 0. 13. 0 / 0. 13. 0 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x11f6650] max_analyze_duration reached Seems stream 0 codec frame rate differs from container frame rate: 600.00 (600/1) -> 30.00 (30/1) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fate- suite/svq3/Vertical400kbit.sorenson3.mov': Metadata: creation_time : 2001-03-20 16:17:18 title : Vertical Online SV3 Demo title-eng : Vertical Online SV3 Demo artist : Logan Kelsey artist-eng : Logan Kelsey copyright : © Vertical Online 2001 copyright-eng : © Vertical Online 2001 encoder : Sorenson Video 3 encoder-eng : Sorenson Video 3 Duration: 00:00:43.57, start: 0.000000, bitrate: 580 kb/s Stream #0.0(eng): Video: svq3, yuvj420p, 320x240, 391 kb/s, 30.02 fps, 30 tbr, 600 tbn, 600 tbc Metadata: creation_time : 2001-03-20 16:17:18 Stream #0.1(eng): Audio: adpcm_ima_qt, 44100 Hz, 1 channels, s16 Metadata: creation_time : 2001-03-20 16:17:18 Incompatible pixel format 'yuvj420p' for codec 'mpeg4', auto-selecting format 'yuv420p' [buffer @ 0x11ff120] w:320 h:240 pixfmt:yuvj420p [ffsink @ 0x11f7780] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out' [scale @ 0x11f7a90] w:320 h:240 fmt:yuvj420p -> w:320 h:240 fmt:yuv420p flags:0xa0000004 Output #0, avi, to 'out.avi': Metadata: creation_time : 2001-03-20 16:17:18 INAM : Vertical Online SV3 Demo title-eng : Vertical Online SV3 Demo IART : Logan Kelsey artist-eng : Logan Kelsey ICOP : © Vertical Online 2001 copyright-eng : © Vertical Online 2001 encoder-eng : Sorenson Video 3 ISFT : Lavf52.103.0 Stream #0.0(eng): Video: mpeg4, yuv420p, 320x240, q=2-31, 200 kb/s, 30 tbn, 30 tbc Metadata: creation_time : 2001-03-20 16:17:18 Stream mapping: Stream #0.0 -> #0.0 Press ctrl-c to stop encoding frame= 1308 fps=439 q=5.0 Lsize= 1977kB time=43.57 bitrate= 371.7kbits/s video:1940kB audio:0kB global headers:0kB muxing overhead 1.904159% $ ./ffmpeg -i out.avi -f null - FFmpeg version git-N-28683-g2007c1b, Copyright (c) 2000-2011 the FFmpeg developers built on Mar 28 2011 23:49:16 with gcc 4.5.2 configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl libavutil 50. 40. 0 / 50. 40. 0 libavcodec 52.116. 0 / 52.116. 0 libavformat 52.103. 0 / 52.103. 0 libavdevice 52. 3. 0 / 52. 3. 0 libavfilter 1. 76. 0 / 1. 76. 0 libswscale 0. 13. 0 / 0. 13. 0 Input #0, avi, from 'out.avi': Metadata: artist : Logan Kelsey copyright : © Vertical Online 2001 title : Vertical Online SV3 Demo encoder : Lavf52.103.0 Duration: 00:00:43.60, start: 0.000000, bitrate: 371 kb/s Stream #0.0: Video: mpeg4, yuv420p, 320x240 [PAR 1:1 DAR 4:3], 30 tbr, 30 tbn, 30 tbc [buffer @ 0x11f9ab0] w:320 h:240 pixfmt:yuv420p [setdar @ 0x1210240] a:4/3 [setdar @ 0x1210240] w:320 h:240 -> dar:4/3 sar:1/1 Output #0, null, to 'pipe:': Metadata: artist : Logan Kelsey copyright : © Vertical Online 2001 title : Vertical Online SV3 Demo encoder : Lavf52.103.0 Stream #0.0: Video: rawvideo, yuv420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 30 tbc Stream mapping: Stream #0.0 -> #0.0 Press ctrl-c to stop encoding [mpeg4 @ 0x11f9010] illegal MB_type [mpeg4 @ 0x11f9010] Error at MB: 262 [mpeg4 @ 0x11f9010] concealing 0 DC, 0 AC, 0 MV errors frame= 1308 fps= 0 q=0.0 Lsize= -0kB time=43.60 bitrate= -0.0kbits/s video:0kB audio:0kB global headers:0kB muxing overhead -inf% }}} -- Ticket URL: <http://avcodec.org/trac/ffmpeg/ticket/28> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker