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Autres articles (28)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Gestion de la ferme

    2 mars 2010, par

    La ferme est gérée dans son ensemble par des "super admins".
    Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
    Dans un premier temps il utilise le plugin "Gestion de mutualisation"

Sur d’autres sites (4055)

  • Is there a way to handle discontinuities with FFMPEG ?

    16 avril 2020, par Dave Stein

    I am running ffmpeg like this, to get a screenshot from an HLS manifest :

    



    ffmpeg -i 'https://example.com/myfile.ism/manifest' -vframes 1 test.jpg -y

    



    There are times where there are gaps in the HLS manifest. When I run that command, it fails because it can't find a frame. Is there anything I can do to make it more resilient ? ie if it fails getting the time this very second, try the second before that ?

    



    When I watch the video in something like video.js, or even HLS directly in Safari, I see a frame regardless of gaps. It just jumps sometimes - I always see a frame.

    



    How would I be able to replicate that here such that the ffmpeg command will always return a frame ?

    


  • how to repeat this ffmpeg effect

    5 septembre 2018, par Vladislav Korobeinikov

    I looking for solution - how to repeat effects :

    1. Zoom on central bottom part at start, with no zoom effect ;
    2. Moving from bottom to top and from left to right ;
    3. Zoom out.

    In this video with ffmpeg filters.

    I read documentation (filters and zoompan filter) from official site, found some information from "ffmpeg basics" written by Frantisek Korbel - but I didn’t find any useful information that solve my problem.

    Also I thought that it could be made with another software.

  • ffmpeg return black and white image

    16 décembre 2011, par njai

    Video capture device is kworld dvd maker 2 (em2861)
    It returns the image in "black and white" with green line at the bottom of screen ; but when I tested it with webcam, it worked properly.

    Here is 30s video. http://www.youtube.com/watch?v=7q2wFGVwGGI

    How can I convert it to color ?

    [root@localhost ~]# ffmpeg -f video4linux2 -i /dev/video0 -vcodec mpeg4 -y output.mp4
    
ffmpeg version git-2011-11-05-5fd1a69, Copyright (c) 2000-2011 the FFmpeg developers
    
built on Nov  5 2011 21:10:52 with gcc 4.4.4 20100726 (Red Hat 4.4.4-13)
    
configuration: --enable-libx264 --enable-gpl --enable-libvpx
    
libavutil    51. 23. 0 / 51. 23. 0
    
libavcodec   53. 27. 0 / 53. 27. 0
    
libavformat  53. 18. 0 / 53. 18. 0
    
libavdevice  53.  4. 0 / 53.  4. 0
    
libavfilter   2. 47. 0 /  2. 47. 0
    
libswscale    2.  1. 0 /  2.  1. 0
    
libpostproc  51.  2. 0 / 51.  2. 0
    
[video4linux2,v4l2 @ 0x2a64780] Estimating duration from bitrate, this may be inaccurate
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
Duration: N/A, start: 1320637788.113946, bitrate: 165888 kb/s
    
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 165888 kb/s, 25 tbr, 1000k tbn, 25 tbc
    
Incompatible pixel format 'yuyv422' for codec 'mpeg4', auto-selecting format 'yuv420p'
    
[buffer @ 0x2a63920] w:720 h:576 pixfmt:yuyv422 tb:1/1000000 sar:0/1 sws_param:
    
[buffersink @ 0x2a63cc0] auto-inserting filter 'auto-inserted scale 0' between the filter    'src' and the filter 'out'
    
[scale @ 0x2a64560] w:720 h:576 fmt:yuyv422 -> w:720 h:576 fmt:yuv420p flags:0x4
    
Output #0, mp4, to 'output.mp4':
    
Metadata:
    
encoder         : Lavf53.18.0
    
Stream #0:0: Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 720x576, q=2-31, 200 kb/s, 25    tbn, 25 tbc
    
Stream mapping:
    
Stream #0.0 -> #0.0 (rawvideo -> mpeg4)
    
Press [q] to stop, [?] for help
    
frame=  969 fps= 25 q=31.0 Lsize=    1547kB time=00:00:38.76 bitrate= 327.0kbits/s    
    
video:1538kB audio:0kB global headers:0kB muxing overhead 0.561411%

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