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Médias (3)

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  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

Sur d’autres sites (6327)

  • lavf/hevc : pad the RBSP buffer as required by the bistream reader

    30 juin 2015, par Anton Khirnov
    lavf/hevc : pad the RBSP buffer as required by the bistream reader
    • [DH] libavformat/hevc.c

  • ffmpeg command line for capturing (and recording) audio and video in 720p from decklink card using Windows 7

    24 novembre 2014, par Huron

    I am trying to capture audio and video from a blackmagic decklink capture card using Windows 7 @ 720p, but I cant seem to get the ffmpeg command line settings right.

    ffmpeg -list_devices true -f dshow -i dummy

    [dshow @ 02457a60] DirectShow video devices
    
[dshow @ 02457a60]  "Blackmagic WDM Capture"
    
[dshow @ 02457a60]  "Decklink Video Capture"
    
[dshow @ 02457a60] DirectShow audio devices
    
[dshow @ 02457a60]  "Decklink Audio Capture"

    ffmpeg -list_options true -f dshow -i video="Decklink Video Capture"

    [dshow @ 03c2ea20] DirectShow video device options
    
[dshow @ 03c2ea20]  Pin "Capture"
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=720x486 fps=29.97 max s=720x486 fps=29.97
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=720x486 fps=23.976 max s=720x486 fps=23.976
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=720x576 fps=25 max s=720x576 fps=25
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=720x486 fps=59.9402 max s=720x486 fps=59.9402
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=720x576 fps=50 max s=720x576 fps=50
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1920x1080 fps=23.976 max s=1920x1080 fps=23.976
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1920x1080 fps=24 max s=1920x1080 fps=24
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1920x1080 fps=25 max s=1920x1080 fps=25
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1920x1080 fps=29.97 max s=1920x1080 fps=29.97
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1920x1080 fps=30 max s=1920x1080 fps=30
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1280x720 fps=50 max s=1280x720fps=50
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1280x720 fps=59.9402 max s=1280x720 fps=59.9402
    
[dshow @ 03c2ea20]   pixel_format=uyvy422  min s=1280x720 fps=60.0002 max s=1280x720 fps=60.0002

    ffmpeg -list_options true -f dshow -i audio="Decklink Audio Capture"

    [dshow @ 047fea20] DirectShow audio device options
    
[dshow @ 047fea20]  Pin "Capture"
    
[dshow @ 047fea20]   min ch=1 bits=16 rate= 48000 max ch=1 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=2 bits=16 rate= 48000 max ch=2 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=4 bits=16 rate= 48000 max ch=4 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=6 bits=16 rate= 48000 max ch=6 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=8 bits=16 rate= 48000 max ch=8 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=10 bits=16 rate= 48000 max ch=10 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=12 bits=16 rate= 48000 max ch=12 bits=16 rate= 48000
    
[dshow @ 047fea20]   min ch=16 bits=16 rate= 48000 max ch=16 bits=16 rate= 48000

    This is the stream information for my current video/audio source, connected to the decklink card’s hdmi port

    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422(tv), 1280x720, 59.94 tbr, 10000k tbn, 59.94 tbc
    
Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s

    Ultimately I will need to display this video on screen. And simultaneously be able to start and stop recording, while the preview keeps playing.

    My idea was to use ffmpeg to capture the video and audio signal and transmit this to a network stream (eg 127.0.0.1:6666). Then use VLC player to display the stream (the preview). And ultimately start and/or stop another ffmpeg to save that same stream to disk.

    In my mind this works, but I am no audio/video expert so if anyone with more experience could help out, I would appreciate it.

    Update :

    I have been able to display the video using ffplay, with the following command :

    ffplay -f dshow -video_size 1280x720 -rtbufsize 702000k -framerate 60 -i video="Decklink Video Capture":audio="Decklink Audio Capture" -threads 2

    Next step is streaming it so I can view the stream (preview) with VLC.

    Tried to use this command :

    ffmpeg -f dshow -video_size 1280x720 -rtbufsize 702000k -framerate 60 -i video="Decklink Video Capture":audio="Decklink Audio Capture" -threads 2 -f mpegts rtp://127.0.0.1:6666?pkt_size=188?buffer_size=65535

    Which does not give any errors, so appears to work. But when I try to open the stream in VLC I get the following error :

    SDP required :
    A description in SDP format is required to receive the RTP stream. Note that rtp :// URIs cannot work with dynamic RTP payload format (65).

    After a bit of reading it seems I should not be streaming to rtp :// but rather to udp ://

    Command became :

    ffmpeg -f dshow -video_size 1280x720 -rtbufsize 702000k -framerate 60 -i video="Decklink Video Capture":audio="Decklink Audio Capture" -threads 2 -f mpegts udp://127.0.0.1:6666?pkt_size=188?buffer_size=65535

    And when I try to open it now in VLC I get no error, no warning, but also no video.

    Time for some more reading.

  • lavf/hevc : pad the RBSP buffer as required by the bistream reader

    30 juin 2015, par Anton Khirnov
    lavf/hevc : pad the RBSP buffer as required by the bistream reader
    • [DBH] libavformat/hevc.c

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