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  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

  • Sélection de projets utilisant MediaSPIP

    29 avril 2011, par

    Les exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
    Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
    Ferme MediaSPIP @ Infini
    L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...)

Sur d’autres sites (5104)

  • How do I configure ffmpeg & openh264 so that the video file can be opened in Windows Media Player 12

    10 mars 2017, par Sacha Guyer

    I have successfully created h264/mp4 movie files with ffmpeg and the x264 library.

    Now I would like to change the h264 library from x264 to openH264. I could replace the x264 library with openH264, recompile ffmpeg and produce movie files, without changing my sources that produce the movie. The resulting movie opens fine in Quicktime on Mac, but on Windows, Windows Media Player 12 cannot play it.

    The documentation about Windows Media Player support for h264 is unclear. File types supported by Windows Media Player states in the table that Windows Media Player 12 supports mp4, but the text below says :

    Windows Media Player does not support the playback of the .mp4 file format.

    From what I have observed, Windows Media Player 12 IS capable of playing h264/mp4 files, but only when created with x264.

    Does anyone know how I need to adjust the configuration of the codec/context so that the movie plays in Windows Media Player ? Does Windows Media Player only support certain h264 profiles ?

    I noticed the warning :

    [libopenh264 @ 0x...] [OpenH264] this = 0x..., Warning:bEnableFrameSkip = 0,bitrate can’t be controlled for RC_QUALITY_MODE,RC_BITRATE_MODE and RC_TIMESTAMP_MODE without enabling skip frame

    With the configuration :

    av_dict_set(&options, "allow_skip_frames", "1", 0);

    I could get rid of this warning, but the movie still does not play. Are there other options that need to be set so that the movie plays in Windows Media Player ?

    Thank you for your help

    ffprobe output of the file that does play fine in Windows Media Player :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_x264.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    title           : retina
    
    encoder         : Lavf57.56.100
    
    comment         : Creation Date: 2017-03-10 07:47:39.601
    
  Duration: 00:00:04.17, start: 0.000000, bitrate: 17497 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
    
      yuv420p, 852x754, 17495 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler

    ffprobe output of the file that does not play in Windows Media Player :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_openh264.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    title           : retina
    
    encoder         : Lavf57.56.100
    
    comment         : Creation Date: 2017-03-10 07:49:27.024
    
  Duration: 00:00:04.17, start: 0.000000, bitrate: 17781 kb/s
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661),
    
      yuv420p, 852x754, 17779 kb/s, 24 fps, 24 tbr, 24k tbn, 48k tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler

  • strange artifacts in image - where does a frame start ?

    26 mai 2017, par user3387542

    We are live broadcasting a webcam stream. No audio, video only. The current command that works great :

    # Direct replay works well:
    
ffmpeg -f video4linux2 -r 10 -s 1280x720 -i /dev/video0 -c:v rawvideo -f rawvideo -pix_fmt yuv420p - | \
    
 ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 -framerate 10 -

    but as soon as we try to send this data over the network (udp broadcast / gigabit lan) we are getting strange artefacts into the image.

    # server command:
    
ffmpeg -f video4linux2 -r 10 -s 1280x720 -i /dev/video0 -c:v rawvideo -f rawvideo -pix_fmt yuv420p - | \
    
socat - UDP-DATAGRAM:10.0.0.255:12345,broadcast
    

    
# client command:
    
socat -u udp-recv:12345,reuseaddr - | \
    
ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 -framerate 10 -

    Where do these artifacts come from and how to get rid of them ? Does this has something to do with the client not knowing where a certain video frame starts ?

    We have chosen to stream raw video to reduce latency. The final goal would be to apply opencv tools to the video and react live depending on the situation. Which works great, as long as the camera is plugged in directly into this computer. But we need to set it apart and need multiple clients.

    enter image description here

    The camera used is a Microsoft® LifeCam Studio(TM).

    $ v4l2-ctl -d 0 --list-formats
    
ioctl: VIDIOC_ENUM_FMT
    
Index       : 0
    
Type        : Video Capture
    
Pixel Format: 'YUYV'
    
Name        : YUYV 4:2:2
    

    
Index       : 1
    
Type        : Video Capture
    
Pixel Format: 'MJPG' (compressed)
    
Name        : Motion-JPEG
    

    
Index       : 2
    
Type        : Video Capture
    
Pixel Format: 'M420'
    
Name        : YUV 4:2:0 (M420)

    Update

    To narrow down the issue, I tried to split it up into different tasks :

    1.0. Writing the stream to a file :

    ffmpeg -f video4linux2 -r 10 -s 1280x720 -i /dev/video0 -c:v rawvideo -f rawvideo -pix_fmt yuv420p - > ~/deltemp/rawout

    1.1. Reading the file : The result looks great, no artefacts :

    cat ~/deltemp/rawout | ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 -framerate 10 -

    2.0 Starting the stream and broadcasting the stream as mentioned in the server command above

    2.1 Writing the UDP stream to a file. And watching the file (artifacts are back again)

    socat -u udp-recv:12345,reuseaddr - > ~/deltemp/rawout
    
cat ~/deltemp/rawout | ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 -framerate 10 -

    As test 1 showed no artifacts and test 2 did, it must be something with udp packet loss.

    Test 3 : Reducing quality to 640x480 did not help either.

  • ffmpeg-normalize exits with OSError : [WinError 193] %1 is not a valid Win32 application

    1er septembre 2021, par Moldy1

    I have a large number of files I want to normalize the volume with a simple method using a basic loop.

    


    When trying to use ffmpeg-normalize the application exits with the error. I searched the error on-line but I can't find any issue similar to mine. I thought it may be a 'path' or file type association problem but they look ok.

    


    Can anyone give me an explanation for this error and a possible fix for it please ?

    


    D:\Test>ffmpeg-normalize.exe in.mkv -o out.mkv&#xA;Traceback (most recent call last):&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\runpy.py", line 197, in _run_module_as_main&#xA;    return _run_code(code, main_globals, None,&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\runpy.py", line 87, in _run_code&#xA;    exec(code, run_globals)&#xA;  File "C:\Users\Les\AppData\Local\Programs\Python\Python39\Scripts\ffmpeg-normalize.exe\__main__.py", line 7, in <module>&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\site-packages\ffmpeg_normalize\__main__.py", line 409, in main&#xA;    ffmpeg_normalize = FFmpegNormalize(&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\site-packages\ffmpeg_normalize\_ffmpeg_normalize.py", line 68, in __init__&#xA;    self.has_loudnorm_capabilities = ffmpeg_has_loudnorm()&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\site-packages\ffmpeg_normalize\_cmd_utils.py", line 185, in ffmpeg_has_loudnorm&#xA;    cmd_runner.run_command()&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\site-packages\ffmpeg_normalize\_cmd_utils.py", line 101, in run_command&#xA;    p = subprocess.Popen(&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\subprocess.py", line 947, in __init__&#xA;    self._execute_child(args, executable, preexec_fn, close_fds,&#xA;  File "c:\users\les\appdata\local\programs\python\python39\lib\subprocess.py", line 1416, in _execute_child&#xA;    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,&#xA;OSError: [WinError 193] %1 is not a valid Win32 application&#xA;&#xA;D:\Test>path&#xA;PATH=C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Calibre2\;C:\Program Files (x86)\Calibre2\;C:\Users\Les\AppData\Local\Programs\Python\Python39\Scripts\;C:\Users\Les\AppData\Local\Programs\Python\Python39\;C:\Users\Les\AppData\Local\Microsoft\WindowsApps;D:\MABS\local64\bin-video;C:\Program Files (x86)\sox-14-4-2&#xA;&#xA;D:\Test>ftype python.file&#xA;python.file="C:\Users\Les\AppData\Local\Programs\Python\Python39\python.exe" "%1"&#xA;&#xA;D:\Test>python.exe&#xA;Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec  7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32&#xA;&#xA;ffmpeg -version&#xA;ffmpeg version N-100483-g728b83a7c4-gd67c6c7f6f&#x2B;4 Copyright (c) 2000-2020 the FFmpeg developers&#xA;built with gcc 10.2.0 (Rev6, Built by MSYS2 project)&#xA;&#xA;&#xA;&#xA; D:\Test>ffmpeg-normalize --version&#xA;        ffmpeg-normalize v1.22.1&#xA;</module>

    &#xA;

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