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Autres articles (56)

  • L’espace de configuration de MediaSPIP

    29 novembre 2010, par

    L’espace de configuration de MediaSPIP est réservé aux administrateurs. Un lien de menu "administrer" est généralement affiché en haut de la page [1].
    Il permet de configurer finement votre site.
    La navigation de cet espace de configuration est divisé en trois parties : la configuration générale du site qui permet notamment de modifier : les informations principales concernant le site (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • Récupération d’informations sur le site maître à l’installation d’une instance

    26 novembre 2010, par

    Utilité
    Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
    Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)

Sur d’autres sites (5831)

  • Also print GUIDs as shown in the Windows registry to ease debugging.

    2 décembre 2014, par Carl Eugen Hoyos
    Also print GUIDs as shown in the Windows registry to ease debugging.
    • [DH] libavformat/riff.h

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

    29 octobre 2013, 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.

  • x86inc : Utilize the shadow space on 64-bit Windows

    11 septembre 2013, par Henrik Gramner
    x86inc : Utilize the shadow space on 64-bit Windows

    Store XMM6 and XMM7 in the shadow space in functions that
    
clobbers them. This way we don’t have to adjust the stack
    
pointer as often, reducing the number of instructions as
    
well as code size.
    

    Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
    • [DBH] libavcodec/x86/fft.asm
    • [DBH] libavcodec/x86/h264_deblock.asm
    • [DBH] libavutil/x86/x86inc.asm

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