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Autres articles (71)

  • Submit enhancements and plugins

    13 avril 2011

    If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
    You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

Sur d’autres sites (5791)

  • avcodec/atrac9dec : Check precision_fine/coarse

    19 octobre 2019, par Michael Niedermayer
    avcodec/atrac9dec : Check precision_fine/coarse

    Clipping is done as it was preferred in review
    
See : [FFmpeg-devel] [PATCH 1/5] avcodec/atrac9dec : Check precision_fine/coarse
    

    Fixes : out of array access
    
Fixes : 18330/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC9_fuzzer-5641113058148352
    

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/atrac9dec.c

  • avcodec/xpmdec : Fix multiple pointer/memory issues

    11 mai 2017, par Michael Niedermayer
    avcodec/xpmdec : Fix multiple pointer/memory issues

    Most of these were found through code review in response to
    
fixing 1466/clusterfuzz-testcase-minimized-5961584419536896
    
There is thus no testcase for most of this.
    
The initial issue was Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
    

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/xpmdec.c

  • FFMPEG : Get video and audio stream from different devices

    5 juin 2016, par Ralf Rentschler

    I have an Ubuntu 14.04 machine with a connected video camera. The video camera is connected to the PC with a magewell HDMI-USB3 converter. On the same PC a microphone is connected via the analog microphone slot.

    When I call arecord-l I get the following audio devices :

    arecord -l
    

    
**** Liste der Hardware-Geräte (CAPTURE) **** Karte 1: PCH [HDA Intel PCH], Gerät 0: ALC283 Analog [ALC283 Analog]   Sub-Geräte: 1/1  
    
> Sub-Gerät #0: subdevice #0 Karte 2: XI100DUSBHDMI [XI100DUSB-HDMI],
    
> Gerät 0: USB Audio [USB Audio]   Sub-Geräte: 1/1   Sub-Gerät #0:
    
> subdevice #0

    I try to create a flv video stream and send it to a nginx web server with the rtmp plugin using the following command :

    ffmpeg -f video4linux2 -framerate 30 -video_size 1280x720 -i /dev/video0 -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -video_size 1280x720 -threads 0 -f flv rtmp://192.168.0.36/live/test

    I am now able to stream the video.

    Now I also want to mix the audio sound to the video by sending the following command :

    ffmpeg -f alsa -i hw:1 -f video4linux2 -framerate 30 -video_size 1280x720 -i /dev/video0 -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -video_size 1280x720 -threads 0 -ar 11025 -f flv rtmp://192.168.0.36/live/test

    But now unfortunately I get only the audio sound from the alsa device, but I can see no video stream

    Now I tried to write the stream only to a file instead of sending it to a ramp server :

    ffmpeg -f alsa -i hw:1 -f video4linux2 -i /dev/video0 out.mpg

    If I start the file now with a media player, I get the audio and video.

    How do I have to change my FFMPEG parameters to stream both : audio and video device input to a new flv stream ?

    As I mentioned above, the command line call

    ffmpeg -f alsa -i hw:1 -f video4linux2 -framerate 30 -video_size 1280x720 -i /dev/video0 -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -video_size 1280x720 -threads 0 -ar 11025 -f flv rtmp://192.168.0.36/live/test

    is only encoding and streaming the audio sound, but not the video.

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