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Médias (91)

Autres articles (87)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • 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) (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

Sur d’autres sites (8072)

  • Error while trying to stream higer resolution using ffmpeg and jsmpeg

    11 avril 2017, par trojek

    I try to do a prof of concept of streaming webcam in browser using jsmpeg. It works perfect when I use code from the documentation which is as follows :

    ffmpeg \
    
    -f v4l2 \
    
        -framerate 25 -video_size 640x480 -i /dev/video0 \
    
    -f mpegts \
    
        -codec:v mpeg1video -s 640x480 -b:v 1000k -bf 0 \
    
    http://localhost:8081/supersecret

    My webcam supports resolutions, framerates and formats as in code below :

    [video4linux2,v4l2 @ 0x2655360] Compressed:       mjpeg :          Motion-JPEG : 1920x1080 1280x720 1024x768 640x480 800x600 1280x1024 320x240
    
[video4linux2,v4l2 @ 0x2655360] Raw       :     yuyv422 :           YUYV 4:2:2 : 1920x1080 1280x720 1024x768 640x480 800x600 1280x1024 320x240

    While I change in above code the resolution from 640x480 to e.g. 1024x768, I get an error :

    [mpeg1video @ 0x110f4e0] MPEG1/2 does not support 10/1 fps
    
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    I assume that camera driver change number of fps and MPEG1/2 doesn’t support that numer of fps.
    Probably I get from camera raw data (yuyv422) and it can’t play it with higer framerate when e.f. 10 for 1024x768.
    How Can I modify ffmped execution code in order to stream video in Full HD resulution ?

  • FFmpeg- Concat videos with unknown resolution/frame size/rate etc

    21 mars 2017, par Karandeep Atwal

    On android platform, I am using this library for concatenating videos.
    For mp4 files with Same Properties like frame-size,resolution etc. I have succeeded concatenating by this command-

    -f concat -safe 0 -i inputfile.txt -codec copy Outputfile

    where inputfile.txt contains-

    file /storage/emulated/0/demo/vid1.mp4
    
file /storage/emulated/0/demo/vid2.mp4
    
file /storage/emulated/0/demo/vid3.mp4
    
file /storage/emulated/0/demo/vid4.mp4

    But, this command only works if input video files have SAME Properties eg. videos made from camera app.If we add other mp4 videos to the input eg. Whatsapp Videos, then I got corrupted Output. It is described here.

    I have read about Concat-Filter ,But this is not working in my case giving me errors like Media-mismatch asked here, different SAR value,frame-size etc. doesn’t match. I also used this Command but it takes about three hours for 25Mb & 5Mb video.

    I want to choose as many random videos from storage and want to concat them. I also think of converting every chosen video to same bitrate, same frame size, same aspect ratio, but it is time-consuming.

    What would be the Best Way to Concat videos of unknown type using ffmpeg commands ?

  • avcodec/vp6 : clear dimensions on failed resolution change in vp6_parse_header()

    12 mars 2017, par Michael Niedermayer
    avcodec/vp6 : clear dimensions on failed resolution change in vp6_parse_header()

    Fixes : 807/clusterfuzz-testcase-6470061042696192
    
Fixes null pointer dereference
    

    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/vp6.c

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