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  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

  • 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 (9060)

  • FFmpeg add caption to top of video like memes

    25 juin 2018, par Praveen Tamil

    I’m trying to add a top section to a video like we do for image memes. I’m using drawtext option for that but the text is wrapped in output video.

    Let’s say I have a video and I need to add the caption like this to the whole video. How can i achieve this ?

    Expected output
    Expected video output

    Resulted outputResulted output

    I use below command for above result

    ffmpeg -ss 20 -i  D:\21-03-2018\15271618235b06a3df9d5cb.mp4 -filter_complex "[0:v]pad=iw:ih+50:0:50:color=white, drawtext=text='Meme Top Text will go here but it\\\\\'s a long text with multi line option. Line 1 text \n line 2 text \n line 3 text':fix_bounds=true:fontfile=Arial.ttf:fontsize=30:fontcolor=black:x=(w-tw)/2:y=(50-th)/2" -vframes 1 D:\21-03-2018\output.jpg

  • Motion : Raspian webcam Unable to find a compatible palette format

    25 juin 2018, par mrtumnus

    I am trying to get a Creative Live ! Motion webcam working on a Raspberry Pi 3 B+. fswebcam and motion both give an error, "Unable to find a compatible palette format". ffmpeg, on the other hand, is able to easily capture video from the webcam.

    Device info :

    $ lsusb
    
Bus 001 Device 004: ID 041e:4041 Creative Technology, Ltd Webcam Live! Motion`
    

    
$ v4l2-ctl --all
    
Driver Info (not using libv4l2):
    
    Driver name   : sq930x
    
    Card type     : Creative WebCam Live! Motion
    
    Bus info      : usb-3f980000.usb-1.2
    
    Driver version: 4.14.34
    
    Capabilities  : 0x85200001
    
            Video Capture
    
            Read/Write
    
            Streaming
    
            Extended Pix Format
    
            Device Capabilities
    
    Device Caps   : 0x05200001
    
            Video Capture
    
            Read/Write
    
            Streaming
    
            Extended Pix Format
    
Priority: 2
    
Video input : 0 (sq930x: ok)
    
Format Video Capture:
    
    Width/Height      : 640/480
    
    Pixel Format      : 'RGGB'
    
    Field             : None
    
    Bytes per Line    : 640
    
    Size Image        : 307200
    
    Colorspace        : sRGB
    
    Transfer Function : Default
    
    YCbCr/HSV Encoding: Default
    
    Quantization      : Default
    
    Flags             :
    
Streaming Parameters Video Capture:
    
    Frames per second: invalid (0/0)
    
    Read buffers     : 2
    

    
User Controls
    

    
                   exposure (int)    : min=1 max=4095 step=1 default=854 value=854
    
                       gain (int)    : min=1 max=255 step=1 default=141 value=141

    Log of motion failure to open device :

    $ cat /var/log/motion/motion.log
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] motion_startup: Using log type (ALL) log level (NTC)
    
[0:motion] [NTC] [ENC] [Jun 24 16:16:42] ffmpeg_init: ffmpeg libavcodec version 57.48.101 libavformat version 57.41.100
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Motion running in setup mode.
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is from /etc/motion/motion.conf
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is device: /dev/video0 input -1
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Stream port 8081
    
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Waiting for threads to finish, pid: 12067
    
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] http_bindsock: listening on 127.0.0.1 port 8080
    
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] motion_init: Camera 0 started: motion detection Enabled
    
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] httpd_run: Started motion-httpd server on port 8080 (auth Disabled)
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using videodevice /dev/video0 and input -1
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability:
    
------------------------
    
cap.driver: "sq930x"
    
cap.card: "Creative WebCam Live! Motion"
    
cap.bus_info: "usb-3f980000.usb-1.2"
    
cap.capabilities=0x85200001
    
------------------------
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - VIDEO_CAPTURE
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - READWRITE
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - STREAMING
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: name = "sq930x", type 0x00000002, status 00000000
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: - CAMERA
    
[1:ml1] [WRN] [VID] [Jun 24 16:16:42] v4l2_select_input: Device doesn't support VIDIOC_G_STD
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Config palette index 17 (YU12) doesn't work.
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Supported palettes:
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: (0) RGGB (8-bit Bayer RGRG/GBGB)
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: 0 - 8-bit Bayer RGRG/GBGB (compressed : 0) (0x42474752)
    
[1:ml1] [ERR] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Unable to find a compatible palette format.
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using V4L1
    
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] image_ring_resize: Resizing pre_capture buffer to 1 items
    
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_init: Error capturing first image
    
[1:ml1] [NTC] [STR] [Jun 24 16:16:52] http_bindsock: listening on 127.0.0.1 port 8081
    
[1:ml1] [NTC] [ALL] [Jun 24 16:16:52] motion_init: Started motion-stream server on port 8081 (auth Disabled)
    
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_loop: Video device fatal error - Closing video device
    
[1:ml1] [NTC] [VID] [Jun 24 16:16:52] vid_close: Closing video device /dev/video0

    Successful ffmpeg recording :

    $ ffmpeg -i /dev/video0 test.mp4
    
ffmpeg version 3.2.10-1~deb9u1+rpt1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1+rpt1' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[video4linux2,v4l2 @ 0x16035c0] Time per frame unknown
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 2523.746120, bitrate: N/A
    
    Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 640x480, 25.42 tbr, 1000k tbn, 1000k tbc

    Related questions :

    Raspberry Pi webcam unable to open video device

    webcam Unable to find a compatible palette format

  • FFMPEG MKV Causing Errors in DASH JS

    24 juin 2018, par Mike

    I’m getting the following browser errors (on all browsers) using Dash JS when transcoding and MKV file :

    ERROR DOMException: Failed to read the 'buffered' property from 'SourceBuffer': This SourceBuffer has been removed from the parent media source.

    and...

    dash.all.min.js:26 Uncaught (in promise) DOMException: Failed to load because no supported source was found.

    What’s weird is I have no issues when I transcode a MP4 file. I’m using FFMPEG in conjunction with Bento4 to build MPEG DASH and HLS files for my video player.

    What I did to single out FFMPEG was to transcode a video that gave me errors on my test server on my local machine (which works) and start the Bento4 process on that file. Doing that, I had no issues and everything played just fine.

    I have removed FFMPEG and reinstalled it multiple times and I always get the same result. I’m sure I screwed something up on my server, but for the life of me I can’t seem to figure out where to start with fixing the issue.

    FFMPEG Version

    ffmpeg version N-91321-ge85c608 Copyright (c) 2000-2018 the FFmpeg developers
    

    
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
    

    
configuration: 
    
--prefix=/root/ffmpeg_build 
    
--pkg-config-flags=--static 
    
--extra-cflags=-I/root/ffmpeg_build/include 
    
--extra-ldflags=-L/root/ffmpeg_build/lib 
    
--extra-libs=-lpthread 
    
--extra-libs=-lm 
    
--bindir=/root/bin 
    
--enable-gpl 
    
--enable-libfdk_aac 
    
--enable-libfreetype 
    
--enable-libmp3lame 
    
--enable-libopus 
    
--enable-libvorbis 
    
--enable-libtheora 
    
--enable-libx264 
    
--enable-nonfree
    
libavutil      56. 18.102 / 56. 18.102
    
libavcodec     58. 20.102 / 58. 20.102
    
libavformat    58. 17.100 / 58. 17.100
    
libavdevice    58.  4.101 / 58.  4.101
    
libavfilter     7. 25.100 /  7. 25.100
    
libswscale      5.  2.100 /  5.  2.100
    
libswresample   3.  2.100 /  3.  2.100
    
libpostproc    55.  2.100 / 55.  2.100

    FFMPEG Command

    ffmpeg 
    
-i ${DIRECTORY}/${INPUT_FILE} 
    
-progress ${DIRECTORY}/transcode.log 
    
-s 1920x1080 
    
-c:v libx264 
    
-b:v 3000k 
    
-c:a aac 
    
-b:a 32k 
    
-minrate 3000k 
    
-maxrate 3000k 
    
-bufsize 6000k 
    
-g 96 
    
-keyint_min 96 
    
-sc_threshold 0 
    
-profile:v high 
    
-flags +cgop 
    
-movflags faststart 
    
-preset ultrafast 
    
-pix_fmt yuv420p 
    
${DIRECTORY}/ffmpeg_1920_1080_3000.mp4 &> ${DIRECTORY}/ffmpeg.log

    Also, I get no errors and and if I access the output files directly, they play just fine.

    I’m sure I’m not including all the information needed to troubleshoot this, so let me know if there is better information I can provide.

    What would cause FFMPEG to transcode MP4 and not MKV ?

    EDIT
    One last thing, I converted the MKV to an MP4 then used the above command and it worked. It’s like MP4 to MP4 is fine, but MKV to MP4 is broke.

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