September 2012 - FFmpeg-trac - lists.ffmpeg.org

#1539(avcodec:new): ModPlug compile bug
by FFmpeg 04 Oct '13

04 Oct '13

#1539: ModPlug compile bug ----------------------------------+--------------------------------------- Reporter: chinshou | Type: defect Status: new | Priority: normal Component: avcodec | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+--------------------------------------- Summary of the bug: when compile the ffmpeg with libmodplug --enable-libmodplug , gcc reported following error operator new [] unresolved error Fix: add stdc++ library to link parameters. Patch attached. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1539> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1753(undetermined:new): Delay output for X seconds
by FFmpeg 30 Sep '13

30 Sep '13

#1753: Delay output for X seconds -------------------------------------+------------------------------------- Reporter: burek | Type: Status: new | enhancement Component: | Priority: wish undetermined | Version: Keywords: | unspecified Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- It would be nice to add a feature where the output could be delayed for certain amount of time (specified in seconds or hh:mm:ss.mmm). One use case for this might be the case where we want to capture the video, only when a certain event occurs (like lightning bolt, robbery or trespassing for example). If we start capturing the output at that exact moment, we might loose some valuable time, but if the output was buffered, then capturing would start in the past, enabling people to record an important event. How to make use of the feature? Start one ffmpeg to capture and buffer the webcam input (the output will start after 10 seconds and will continue real-time, always being late for 10 seconds, comparing to the current time): {{{ ffmpeg -f v4l2 -i /dev/video0 -vf delay 10 -af delay 10 -f mpegts udp://localhost:1234 }}} Start another ffmpeg only when some important event occurs (triggered by the sensor or something similar): {{{ ffmpeg -f mpegts -i udp://localhost:1234 -map 0 -c copy capture.avi }}} Obviously capture.avi will start recording from the past, considering the current time the event was triggered, which will allow the beginning of the event to get recorded as well. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1753> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1275(undetermined:new): ffserver x264 presets
by FFmpeg 29 Sep '13

29 Sep '13

#1275: ffserver x264 presets -------------------------------------+------------------------------------- Reporter: burek | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- ffserver is started with a simple config file (ffserver.conf) that defined only libx264 flv output and ffmpeg is started to feed the ffserver after which the error is received, which I don't know how to get around, because I don't know how to set "-vpre" or "-preset" in ffserver.conf file (when I try to set -vpre or -preset at ffmpeg's command line, I get the same error as provided here): ffserver.conf: {{{ Port 8090 BindAddress 0.0.0.0 CustomLog - <Feed feed1.ffm> File /tmp/feed1.ffm FileMaxSize 200K ACL allow 127.0.0.1 </Feed> <Stream test1.flv> Feed feed1.ffm Format flv NoAudio VideoCodec libx264 VideoFrameRate 25 AVOptionVideo flags +global_header </Stream> <Stream stat.html> Format status ACL allow localhost ACL allow 192.168.0.0 192.168.255.255 </Stream> <Redirect index.html> URL http://www.ffmpeg.org/ </Redirect> }}} the result: {{{ # ffserver -d -f ffserver.conf & # ffmpeg -i http://10.1.2.3:45678 -vf yadif http://localhost:8090/feed1.ffm ffmpeg version git-2012-05-03-28d37f7 Copyright (c) 2000-2012 the FFmpeg developers built on May 3 2012 13:43:26 with gcc 4.6.3 configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 libavutil 51. 49.100 / 51. 49.100 libavcodec 54. 17.101 / 54. 17.101 libavformat 54. 3.100 / 54. 3.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 72.104 / 2. 72.104 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 11.100 / 0. 11.100 libpostproc 52. 0.100 / 52. 0.100 [mpeg2video @ 0x2232c40] mpeg_decode_postinit() failure Last message repeated 5 times [mpegts @ 0x222d120] max_analyze_duration 5000000 reached at 5016000 [mpegts @ 0x222d120] Estimating duration from bitrate, this may be inaccurate Input #0, mpegts, from 'http://10.1.2.3:45678': Duration: N/A, start: 1787.574700, bitrate: 15256 kb/s Program 1714 Stream #0:0[0x58c]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 15000 kb/s, 25.82 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x596]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16, 256 kb/s [buffer @ 0x2428500] w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:64/45 sws_param:flags=2 [scale @ 0x2233f60] w:720 h:576 fmt:yuv420p sar:64/45 -> w:160 h:128 fmt:yuv420p sar:64/45 flags:0x4 [libx264 @ 0x2277080] broken ffmpeg default settings detected [libx264 @ 0x2277080] use an encoding preset (e.g. -vpre medium) [libx264 @ 0x2277080] preset usage: -vpre <speed> -vpre <profile> [libx264 @ 0x2277080] speed presets are listed in x264 --help [libx264 @ 0x2277080] profile is optional; x264 defaults to high Output #0, ffm, to 'http://localhost:8090/feed1.ffm': Stream #0:0: Video: h264, yuv420p, 160x128 [SAR 64:45 DAR 16:9], q=2-31, 128 kb/s, 1000k tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mpeg2video -> libx264) Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height }}} Generally, when I start ffmpeg only (without ffserver) no matter what libx264 options I give at cmd line, ffmpeg will fill out other (missing) options, like bitrate, width/height, etc with some default values. When I use ffserver with same ffmpeg cmd lines, I usually get this kind of "vpre error" mentioned above. How can I work around that error? Please help, thanks in advance. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1275> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#738(avcodec:new): libacvodec cannot be built if it configured with "--disable-optimizations"
by FFmpeg 24 Sep '13

24 Sep '13

#738: libacvodec cannot be built if it configured with "--disable-optimizations" ---------------------------------+-------------------------------------- Reporter: Andrew | Type: defect Status: new | Priority: minor Component: avcodec | Version: git-master Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ---------------------------------+-------------------------------------- In file included from libavcodec/cabac.h:60, from libavcodec/cabac.c:31: libavcodec/x86/cabac.h: In function ‘get_cabac_bypass_sign_x86’: libavcodec/x86/cabac.h:107: error: can't find a register in class ‘GENERAL_REGS’ while reloading ‘asm’ libavcodec/x86/cabac.h:107: error: ‘asm’ operand has impossible constraints make: *** [libavcodec/cabac.o] Error 1 -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/738> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#113(avcodec:new): AAC - Audio object type 23 is not supported
by FFmpeg 19 Sep '13

19 Sep '13

#113: AAC - Audio object type 23 is not supported -------------------------+--------------------- Reporter: k_s_johnson | Type: defect Status: new | Priority: normal Component: avcodec | Version: git Keywords: AAC-LD | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | -------------------------+--------------------- ffmpeg AAC codec (decoder) doesn't seem to support AAC-LD and libfaad or libfaad2 (which is documented to support AAC-LD) is no longer an audio codec option. So there is no way to decode AAC-LD format audio track anymore. However, vlc on windows seems to play the file ffmpeg build from git snapshot of a few days ago( ffmpeg-HEAD-e16665b) on Fedora 2.6.30.9-96.fc11.x86_6411. command line: ffmpeg -y -i po_arrive...mov -acodec pcm_s24le extracted.wav Error message is: [aac @ 0x1e9bfa0] Audio object type 23 is not supported. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/113> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1437(FFprobe:new): probe less than the whole file with -show_frames
by FFmpeg 19 Sep '13

19 Sep '13

#1437: probe less than the whole file with -show_frames ---------------------------------------+--------------------------------- Reporter: mdsh | Owner: stefano Type: enhancement | Status: new Priority: normal | Component: FFprobe Version: git-master | Keywords: Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 ---------------------------------------+--------------------------------- I'd like to probe a file to get interlaced_frame="1" top_field_first="1" - which I believe is only available in -show_frames. My file is 30 minutes log - I only want the data from the first frame. I can't see anything in -h to answer this question. The ffmpeg -vframes, -frames:v and -t are not listed in ffprobe's help, and do not work. I usually use FFprobe with a -probesize, and that is also ignored with -show_frames. Stefano suggested "And of course you can get it with a crude trick, you trim the file *physically* in order to reduce the amount of data to be decoded" but that's a workaround I'd like to avoid. example current file based command line: ffprobe -show_format -show_streams -show_frames -probesize 40000 -print_format xml "tortoise.mxf" ffprobe version N-41487-gee1748a Copyright (c) 2007-2012 the FFmpeg developers built on Jun 10 2012 17:04:40 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00) configuration: --prefix=/Users/mdsh/ffmpeg --arch=x86_64 --enable-ffplay --enable-ffprobe --enable-shared --disable-indev=jack --enable-gpl --enable-nonfree --enable-pthreads --enable-libfaac --enable-libx264 libavutil 51. 56.100 / 51. 56.100 libavcodec 54. 25.100 / 54. 25.100 libavformat 54. 6.101 / 54. 6.101 libavdevice 54. 0.100 / 54. 0.100 libavfilter 2. 78.101 / 2. 78.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100 [mxf @ 0x7fddb081ae00] Stream #0: not enough frames to estimate rate; consider increasing probesize [mxf @ 0x7fddb081ae00] Stream #1: not enough frames to estimate rate; consider increasing probesize Input #0, mxf, from 'tortoise.mxf': Metadata: timecode : 10:53:51:04 Duration: 00:28:21.92, start: 0.000000, bitrate: 42598 kb/s Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 720x608 [SAR 608:405 DAR 16:9], 30000 kb/s, 25 tbr, 25 tbn, 50 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, 4 channels, s16, 3072 kb/s <?xml version="1.0" encoding="UTF-8"?> <ffprobe> <frames> <frame media_type="video" key_frame="1" pkt_pts="0" pkt_pts_time="0.000000" pkt_dts="0" pkt_dts_time="0.000000" pkt_duration="1" pkt_duration_time="0.040000" pkt_pos="7168" width="720" height="608" pix_fmt="yuv422p" sample_aspect_ratio="608:405" pict_type="I" coded_picture_number="0" display_picture_number="0" interlaced_frame="1" top_field_first="1" repeat_pict="0" reference="3"/> <frame media_type="audio" key_frame="1" pkt_pts="0" pkt_pts_time="0.000000" pkt_dts="0" pkt_dts_time="0.000000" pkt_duration="1" pkt_duration_time="0.040000" pkt_pos="157696" sample_fmt="s16" nb_samples="1920"/> ... goes on for a long time - you *really* don't want the uncut output -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1437> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#681(undetermined:new): -vf mp=pullup is not working
by FFmpeg 18 Sep '13

18 Sep '13

#681: -vf mp=pullup is not working -------------------------------------+------------------------------------- Reporter: dericed | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- When I call -vf mp=pullup or (pullup,softskip) I get an "Error opening filters!" warning. {{{ ffmpeg -y -i example.mov -vf mp=pullup -r 24000/1001 -c:v v210 -c:a copy example_ivtc.mov ffmpeg version N-33392-gf3bacce, Copyright (c) 2000-2011 the FFmpeg developers built on Oct 8 2011 18:33:19 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3) configuration: --enable-gpl libavutil 51. 20. 0 / 51. 20. 0 libavcodec 53. 19. 1 / 53. 19. 1 libavformat 53. 14. 0 / 53. 14. 0 libavdevice 53. 4. 0 / 53. 4. 0 libavfilter 2. 43. 6 / 2. 43. 6 libswscale 2. 1. 0 / 2. 1. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x101005800] Unimplemented container channel layout. [mov,mp4,m4a,3gp,3g2,mj2 @ 0x101005800] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list. Seems stream 0 codec frame rate differs from container frame rate: 30000.00 (30000/1) -> 29.97 (30000/1001) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'example.mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt creation_time : 2011-11-05 17:32:17 Duration: 00:19:52.02, start: -39.572900, bitrate: 1122 kb/s Stream #0:0(eng): Video: v210 (v210 / 0x30313276), yuv422p10le, 720x486, 223725 kb/s, SAR 9:10 DAR 4:3, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc Metadata: creation_time : 2011-11-05 17:32:17 Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 2 channels, s16, 1536 kb/s Metadata: creation_time : 2011-11-05 17:32:17 Stream #0:2(eng): Data: none (tmcd / 0x64636D74) Metadata: creation_time : 2011-11-05 17:32:17 [buffer @ 0x100e01900] w:720 h:486 pixfmt:yuv422p10le tb:1/1000000 sar:9/10 sws_param: [mp @ 0x100e040c0] This is a unholy filter, it will be purified by the ffmpeg exorcist team which will change its syntax from dark -vf mp to light -vf. Thou shalst not make spells or scripts that depend on it [buffersink @ 0x100e03d80] auto-inserting filter 'auto-inserted scale 0' between the filter 'Parsed_mp_0' and the filter 'out' [mp @ 0x100e040c0] auto-inserting filter 'auto-inserted scale 1' between the filter 'src' and the filter 'Parsed_mp_0' [scale @ 0x100e04a80] w:720 h:486 fmt:yuv422p10le -> w:720 h:486 fmt:yuv420p flags:0x4 Error opening filters! }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/681> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#894(undetermined:new): ljpeg: fix losslesss prediction 0 for 24bpp (and 48bpp)
by FFmpeg 16 Sep '13

16 Sep '13

#894: ljpeg: fix losslesss prediction 0 for 24bpp (and 48bpp) -------------------------------------+------------------------------------- Reporter: ami_stuff | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- {{{ $ ffmpeg -i 24_pred0.jpg out2.bmp ffmpeg version 0.9.0.git-12d8340 Copyright (c) 2000-2012 the FFmpeg developers built on Jan 7 2012 02:04:56 with gcc 4.5.2 configuration: --disable-ffplay --disable-ffserver --disable-ffprobe --disable -asm --disable-yasm --disable-shared --enable-static libavutil 51. 34.100 / 51. 34.100 libavcodec 53. 54.100 / 53. 54.100 libavformat 53. 29.100 / 53. 29.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 57.101 / 2. 57.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 5.100 / 0. 5.100 Input #0, image2, from '24_pred0.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: N/A Stream #0:0: Video: mjpeg, bgr24, 640x480, 25 tbr, 25 tbn, 25 tbc [buffer @ 016c1940] w:640 h:480 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param: Output #0, image2, to 'out2.bmp': Metadata: encoder : Lavf53.29.100 Stream #0:0: Video: bmp, bgr24, 640x480, 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:900kB audio:0kB global headers:0kB muxing overhead -100.000000% }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/894> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#232(undetermined:new): bogus error message with amr files: [amrnb @ 0x626e90] dtx mode not implemented.
by FFmpeg 11 Sep '13

11 Sep '13

#232: bogus error message with amr files: [amrnb @ 0x626e90] dtx mode not implemented. ------------------------------+-------------------------- Reporter: matteosistisette | Type: defect Status: new | Priority: critical Component: undetermined | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | ------------------------------+-------------------------- I've just compiled the latest version of ffmpeg from the SVN on a CentOS machine and when I try to decode amr audio files I get this error (repeated a lot of times): {{{ [amrnb @ 0x626e90] dtx mode not implemented. Update your FFmpeg version to the newest one from SVN. If the problem still occurs, it means that your file has a feature which has not been implemented.If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list. }}} On another box, an Ubuntu one, I have installed the ffmpeg package from the repositories and it works fine with the same files. Also, on yet another CentOS box I am using a several-year-old version of ffmpeg that was compiled ages ago which can decode the same amr files just fine. So either the error message is completely wrong and the real problem with the files is different, or there has been some regression in that a feature that had already been implemented ages ago has been dropped. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/232> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#225(undetermined:new): Converting from YUVJ to YUV lose contrast
by FFmpeg 08 Sep '13

08 Sep '13

#225: Converting from YUVJ to YUV lose contrast -------------------------------+------------------------- Reporter: sghpunk | Type: defect Status: new | Priority: important Component: undetermined | Version: git-master Keywords: YUV/YUVJ contrast | Blocked By: Blocking: | Reproduced: 1 Analyzed: 0 | -------------------------------+------------------------- I am trying to transcode video from my Nicon D90 mjpeg to x264. And output video contrast is lower than input. I use ffmpeg-HEAD-27614b1 Command line: ffmpeg.exe -threads 2 -an -i input.mkv -f matroska -vcodec libx264 -profile main -preset fast -cqp 27 -y x264-low_contract_yuv.mkv > enc.log 2>&1 {{{ ffmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers built on May 19 2011 17:41:01 with gcc 4.5.2 configuration: --prefix=/mingw --disable-static --enable-shared --enable-gpl --enable-version3 --disable-doc --enable-postproc --disable- network --enable-memalign-hack --enable-libopencore-amrnb --enable- libopencore-amrwb --enable-libmp3lame --enable-libspeex --enable-libvorbis --enable-libx264 --enable-pthreads --enable-frei0r --extra- cflags='-mthreads -mtune=nocona -march=nocona -msse3 -m80387 -mfpmath=387 -O2 -fgnu89-inline -Wno-error=missing-prototypes' --extra-ldflags='-Wl ,--enable-auto-image-base -Wl,--enable-auto-import' --extra-libs=-ldl --cpu=nocona libavutil 51. 2. 1 / 51. 2. 1 libavcodec 53. 5. 0 / 53. 5. 0 libavformat 53. 0. 3 / 53. 0. 3 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 5. 0 / 2. 5. 0 libswscale 0. 14. 0 / 0. 14. 0 libpostproc 51. 2. 0 / 51. 2. 0 [matroska,webm @ 00b70280] Estimating duration from bitrate, this may be inaccurate Input #0, matroska,webm, from 'input.mkv': Metadata: MAKER : NIKON CORPORATION MODEL : NIKON D90 CREATION_TIME : 2011-05-05 07:47:28 ENCODER : Lavf53.0.3 Duration: 00:00:05.04, start: 0.000000, bitrate: N/A Stream #0.0: Video: mjpeg, yuvj422p, 1280x720, PAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 24 tbc (default) Incompatible pixel format 'yuvj422p' for codec 'libx264', auto-selecting format 'yuv420p' [buffer @ 00b83e00] w:1280 h:720 pixfmt:yuvj422p tb:1/1000000 sar:1/1 [ffsink @ 003efee0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out' [scale @ 00b95920] w:1280 h:720 fmt:yuvj422p -> w:1280 h:720 fmt:yuv420p flags:0xa0000004 [libx264 @ 00b60540] using SAR=1/1 [libx264 @ 00b60540] using cpu capabilities: MMX2 SSE2 SSE3 Cache64 [libx264 @ 00b60540] profile Main, level 3.1 [libx264 @ 00b60540] 264 - core 114 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=27 ip_ratio=1.40 pb_ratio=1.30 aq=0 Output #0, matroska, to 'x264-low_contract_yuv.mkv': Metadata: MAKER : NIKON CORPORATION MODEL : NIKON D90 CREATION_TIME : 2011-05-05 07:47:28 encoder : Lavf53.0.3 Stream #0.0: Video: libx264, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 1k tbn, 24 tbc (default) Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop, [?] for help frame= 10 fps= 0 q=27.0 size= 33kB time=10000000000.00 bitrate= 0.0kbits/s ...CUT... frame= 121 fps= 5 q=-1.0 Lsize= 864kB time=4.96 bitrate=1427.9kbits/s video:863kB audio:0kB global headers:0kB muxing overhead 0.173612% frame I:1 Avg QP:24.00 size: 33897 [libx264 @ 00b60540] frame P:41 Avg QP:27.00 size: 10846 [libx264 @ 00b60540] frame B:79 Avg QP:28.66 size: 5118 [libx264 @ 00b60540] consecutive B-frames: 6.6% 11.6% 22.3% 59.5% [libx264 @ 00b60540] mb I I16..4: 44.1% 0.0% 55.9% [libx264 @ 00b60540] mb P I16..4: 7.9% 0.0% 4.9% P16..4: 42.7% 10.5% 3.3% 0.0% 0.0% skip:30.7% [libx264 @ 00b60540] mb B I16..4: 3.9% 0.0% 0.6% B16..8: 30.6% 7.4% 0.3% direct: 8.4% skip:48.7% L0:41.1% L1:53.7% BI: 5.2% [libx264 @ 00b60540] coded y,uvDC,uvAC intra: 29.7% 47.0% 14.1% inter: 8.7% 11.9% 0.1% [libx264 @ 00b60540] i16 v,h,dc,p: 31% 31% 24% 14% [libx264 @ 00b60540] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 20% 20% 5% 7% 7% 6% 6% 3% [libx264 @ 00b60540] i8c dc,h,v,p: 63% 18% 16% 3% [libx264 @ 00b60540] Weighted P-Frames: Y:2.4% UV:2.4% [libx264 @ 00b60540] ref P L0: 75.4% 24.6% [libx264 @ 00b60540] ref B L0: 80.3% 19.7% [libx264 @ 00b60540] ref B L1: 94.1% 5.9% [libx264 @ 00b60540] kb/s:1401.04 }}} ffmpeg -v 9 -loglevel 99 -i input.mkv > v9.log 2>&1 {{{ ffmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers built on May 19 2011 17:41:01 with gcc 4.5.2 configuration: --prefix=/mingw --disable-static --enable-shared --enable-gpl --enable-version3 --disable-doc --enable-postproc --disable- network --enable-memalign-hack --enable-libopencore-amrnb --enable- libopencore-amrwb --enable-libmp3lame --enable-libspeex --enable-libvorbis --enable-libx264 --enable-pthreads --enable-frei0r --extra- cflags='-mthreads -mtune=nocona -march=nocona -msse3 -m80387 -mfpmath=387 -O2 -fgnu89-inline -Wno-error=missing-prototypes' --extra-ldflags='-Wl ,--enable-auto-image-base -Wl,--enable-auto-import' --extra-libs=-ldl --cpu=nocona libavutil 51. 2. 1 / 51. 2. 1 libavcodec 53. 5. 0 / 53. 5. 0 libavformat 53. 0. 3 / 53. 0. 3 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 5. 0 / 2. 5. 0 libswscale 0. 14. 0 / 0. 14. 0 libpostproc 51. 2. 0 / 51. 2. 0 [NULL @ 00b70280] Format matroska,webm probed with size=2048 and score=100 st:0 removing common factor 1000000 from timebase [mjpeg @ 00b7b700] buffer too small, expanding to 73330 bytes [mjpeg @ 00b7b700] marker=d8 avail_size_in_buf=73330 [mjpeg @ 00b7b700] marker parser used 0 bytes (0 bits) [mjpeg @ 00b7b700] marker=db avail_size_in_buf=73328 [mjpeg @ 00b7b700] index=0 [mjpeg @ 00b7b700] qscale[0]: 3 [mjpeg @ 00b7b700] index=1 [mjpeg @ 00b7b700] qscale[1]: 6 [mjpeg @ 00b7b700] marker parser used 132 bytes (1056 bits) [mjpeg @ 00b7b700] marker=c0 avail_size_in_buf=73194 [mjpeg @ 00b7b700] sof0: picture: 1280x720 [mjpeg @ 00b7b700] component 0 2:1 id: 0 quant:0 [mjpeg @ 00b7b700] component 1 1:1 id: 1 quant:1 [mjpeg @ 00b7b700] component 2 1:1 id: 2 quant:1 [mjpeg @ 00b7b700] pix fmt id 21111100 [mjpeg @ 00b7b700] marker parser used 17 bytes (136 bits) [mjpeg @ 00b7b700] marker=c4 avail_size_in_buf=73175 [mjpeg @ 00b7b700] class=0 index=0 nb_codes=12 [mjpeg @ 00b7b700] class=1 index=0 nb_codes=251 [mjpeg @ 00b7b700] class=0 index=1 nb_codes=12 [mjpeg @ 00b7b700] class=1 index=1 nb_codes=251 [mjpeg @ 00b7b700] marker parser used 418 bytes (3344 bits) [mjpeg @ 00b7b700] escaping removed 115 bytes [mjpeg @ 00b7b700] marker=da avail_size_in_buf=72755 [mjpeg @ 00b7b700] component: 0 [mjpeg @ 00b7b700] component: 1 [mjpeg @ 00b7b700] component: 2 [mjpeg @ 00b7b700] marker parser used 72639 bytes (581110 bits) [mjpeg @ 00b7b700] marker=d9 avail_size_in_buf=3 [mjpeg @ 00b7b700] mjpeg decode frame unused 3 bytes [matroska,webm @ 00b70280] All info found [matroska,webm @ 00b70280] Estimating duration from bitrate, this may be inaccurate Input #0, matroska,webm, from 'input.mkv': Metadata: MAKER : NIKON CORPORATION MODEL : NIKON D90 CREATION_TIME : 2011-05-05 07:47:28 ENCODER : Lavf53.0.3 Duration: 00:00:05.04, start: 0.000000, bitrate: N/A Stream #0.0, 1, 1/1000: Video: mjpeg, yuvj422p, 1280x720, 1/24, PAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 24 tbc (default) At least one output file must be specified }}} Seems like contrast loosing when converting a pixel format from yuvj422p to yuv420p. I tryed to encode same video from mplayer yuv4mpeg raw file and in this case contrast on output video is the same. I cannot find mplayer ftp server to upload samples. Where can I upload it? -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/225> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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