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  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

Sur d’autres sites (3129)

  • Drupal 7 audioconverter module failed - How do I troubleshoot ?

    7 décembre 2012, par Meggy

    I am using the audioconverter module with the audiorecorder module in Drupal 7. Though it was working previously, I just recently noticed that the audioconverter module has stopped converting wav files to mp3. Here's the error in my logs ;

    MESSAGE Audio conversion failed. FFMPEG reported the following output: 
    
SEVERITY error

    I can see the wav file is created by the audiorecorder module but the audioconverter module is failing on the conversion.

    Can anyone steer me as to where I can begin to look ? I don't know where to begin troubleshooting.

  • ffmpeg "Header Missing" error recoding mp3 files

    26 juin 2012, par Jonathan Coe

    I have an mp3 encoding server running on Ubuntu (natty). This has been working perfectly up until maybe a week or two ago. I believe I ran an update, which seemed to break the encoder for me - every time I try to run the encode script, it fails out with the error "Header Missing". Files that encoded previously without any issues no longer encode.

    I am getting the following output when I run a basic ffmpeg script (that worked fine previously). Any ideas what is going on ?

    FFmpeg version 0.6.6-4:0.6.6-0ubuntu0.11.04.1, Copyright (c) 2000-2010 the Libav developers
    
  built on Jun 12 2012 16:28:21 with gcc 4.5.2
    
  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  WARNING: library configuration mismatch
    
  libavutil   configuration: --extra-version=4:0.6.6-1ubuntu1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdirac --enable-libfaad --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavcodec  configuration: --extra-version=4:0.6.6-1ubuntu1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdirac --enable-libfaad --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavformat configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavdevice configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavfilter configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libswscale  configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libpostproc configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
[mp3 @ 0x8aafbc0]max_analyze_duration reached
    
Input #0, mp3, from '1340299085b3da8484f1b089d28460930d1467a749.mp3':
    
  Metadata:
    
    TLAN            : eng
    
    TRCK            : 8/11
    
    TPE1            : Big Wreck
    
    TALB            : Albatross
    
    TYER            : 2012
    
    TIT2            : Rest Of The World
    
    Rip date        : 2012-03-07
    
    TDAT            : 0603
    
    Source          : CD
    
    Release type    : Normal release
    
    TCON            : Rock
    
    TPUB            : Anthem Entertainment Group
    
  Duration: 00:02:51.38, start: 0.000000, bitrate: 320 kb/s
    
    Stream #0.0: Audio: mp3, 44100 Hz, 2 channels, s16, 320 kb/s
    
File 'test.mp3' already exists. Overwrite ? [y/N] y
    
Output #0, mp3, to 'test.mp3':
    
  Metadata:
    
    TSSE            : Lavf52.64.2
    
    Stream #0.0: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 64 kb/s
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
Press [q] to stop encoding
    
[mp3 @ 0x8ab0db0]Header missingrate=  64.0kbits/s    
    
Error while decoding stream #0.0
    
size=    1339kB time=171.42 bitrate=  64.0kbits/s    
    
video:0kB audio:1339kB global headers:0kB muxing overhead 0.002406%

  • Lossless avi encoding on linux

    31 août 2012, par JohnSavage

    I am trying to write video using opencv. It is important for me to do this precisely - so it has to be a lossless codec. I am working with OpenCV 2.4.1 on Ubuntu 12.04

    Previously, I was using the fourcc code 0. This gave me the exact result I wanted, and I was able to recover the images perfectly.

    I am not sure what happened, but as of a recent update (around Jul 20th 2012), something went wrong and I am no longer able to write files with this fourcc code. I really don't remember what it was, but it could have come from doing an update, removing some software from my software center, and some other things I did during general cleaning...

    When I check an older file with mediainfo (http://www.fourcc.org/identifier/) I see the following result :

    Complete name                            : oldsample.avi
    
Format                                   : AVI
    
Format/Info                              : Audio Video Interleave
    
Format profile                           : OpenDML
    
File size                                : 1.07 GiB
    
Duration                                 : 41s 467ms
    
Overall bit rate                         : 221 Mbps
    
Writing application                      : Lavf53.5.0
    
Video
    
ID                                       : 0
    
Format                                   : RGB
    
Codec ID                                 : 0x00000000
    
Codec ID/Info                            : Basic Windows bitmap format. 1, 4 and 8 bpp     versions are palettised. 16, 24 and 32bpp contain raw RGB samples
    
Duration                                 : 41s 467ms
    
Bit rate                                 : 221 Mbps
    
Width                                    : 640 pixels
    
Height                                   : 4294966 816 pixels
    
Display aspect ratio                     : 0.000
    
Frame rate                               : 30.000 fps
    
Bit depth                                : 8 bits
    
Stream size                              : 1.07 GiB (100%)

    Now, I see that when I write using the 0 fourcc codec, the program actually defaults to the i420 codec. Here is the output from one of the files I try to write now :

    Complete name                            : newsample.avi
    
Format                                   : AVI
    
Format/Info                              : Audio Video Interleave
    
File size                                : 73.0 MiB
    
Duration                                 : 5s 533ms
    
Overall bit rate                         : 111 Mbps
    
Writing application                      : Lavf54.6.100
    
Video
    
ID                                       : 0
    
Format                                   : YUV
    
Codec ID                                 : I420
    
Codec ID/Info                            : 8 bit Y plane followed by 8 bit 2x2 subsampled U and V planes.
    
Duration                                 : 5s 533ms
    
Bit rate                                 : 111 Mbps
    
Width                                    : 640 pixels
    
Height                                   : 480 pixels
    
Display aspect ratio                     : 4:3
    
Frame rate                               : 30.000 fps
    
Compression mode                         : Lossless
    
Bits/(Pixel*Frame)                       : 12.000
    
Stream size                              : 72.9 MiB (100%)

    This format, and other formats I try to use (like huffyuv HFYU), do not work for me because I end up with effects like this http://imgur.com/a/0OC4y - you see the bright artifacts coming in due to what I assume is either lossy compression or chroma subsampling in the case of HFYU which is supposed to be lossless. What you are looking at is the red channel from one of my videos. The perceptual effect is negligible when you look at all 3 channels simultaneously but it is essential that I reconstruct the images exactly.

    Furthermore, while I am able to play my old files in media players like vlc, I suddenly find them to be completely incompatible with opencv. When I try to open the older files with a videocapture, the open step works fine, but trying to do a read operation results in a segfault. Furthermore, When I try to write with either :

    CV_FOURCC(0,0,0,0)
    
0

    Opencv defaults to I420 for some reason.

    Next, I tried using some alternate codecs. 'DIB ' seems like something that should work for me, and on the opencv website (http://opencv.willowgarage.com/wiki/VideoCodecs) it is listed as a 'recommended' codec. However, trying to use this results in the following message :

    OpenCV-2.4.1/modules/highgui/src/cap_gstreamer.cpp:483: error: (-210) Gstreamer Opencv backend doesn't support this codec acutally. in function CvVideoWriter_GStreamer::open
    

    
Aborted (core dumped)

    I checked the opencv source for this codec, and stumbled across the following :

    cd OpenCV-2.4.1/modules
    
grep -i -r "CV_FOURCC" ./*
    
...
    
./highgui/src/cap_qt.cpp:    /*if( fourcc == CV_FOURCC( 'D', 'I', 'B', ' ' ))
    
./highgui/include/opencv2/highgui/highgui_c.h:#define CV_FOURCC_DEFAULT CV_FOURCC('I', 'Y', 'U', 'V') /* Use default codec for specified filename (Linux only) */

    I tried installing qt4 and reconfiguring with the WITH_QT flag, but that did not change anything. I also tried uncommenting that part of the code and reinstalling opencv, but that also did not work.

    My ultimate goal is for any way to efficiently store and retrieve a video stream with 16 bits for every pixel (like 32float would work fine, and then it wouldn't need to be perfect). Right now I am unpacking the 16 bits into the red and green channels, which is why I need it to be perfect - since an error of 1 in the red channel is multiplied by 256 in the final result. I am not having success with any of the fourcc codes available to me.

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