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  • 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

  • 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 (...)

  • 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 (10384)

  • FATE’s New Look

    4 août 2010, par Multimedia Mike — FATE Server

    The FATE main page exposes a lot of data. The manner in which it is presented has always been bounded by my extremely limited web development abilities. I wrestled with whether I should learn better web development skills first and allow that to inform any improved design, or focus on the more useful design and invest my web development learning time towards realizing that design.

    Fortunately, Mans solved this conundrum with an elegantly simple solution :



    The top of the page displays a status bar that illustrates — at a glance — how functional the codebase is. The web page source code identifies this as the failometer. It took me a few seconds to recognize what information that status bar was attempting to convey ; maybe it could use a succinct explanation.

    Mini-Book Review

    Before Mans took over, I thought about this problem quite a bit. I needed inspiration for creating a better FATE main page and aggregating a large amount of data in a useful, easily-digested form. Looking around the web, I see no shortage of methods for visualizing data. I could start shoehorning FATE data into available methods and see what works. But I thought it would be better to take a step back and think about the best way to organize the data. My first clue came awhile ago in the form of an xkcd comic : Blogofractal. Actually, the clue came from the mouseover text which recommended Edward Tufte’s "The Visual Display of Quantitative Information".



    I ordered this up and plowed through it. It’s an interesting read, to be sure. However, I think it illustrates what a book on multimedia and compression technology would look like if authored by yours truly— a book of technical curiosities from epochs past that discusses little in the way of modern practical application. Tufte’s book showed me lots of examples of infographics from decades and even centuries past, but I never concisely learned exactly how to present data such as FATE’s main page in a more useful form.

    Visualization Blog
    More recently, I discovered a blog called Flowing Data, authored by a statistics Ph.D. candidate who purportedly eats, sleeps, and breathes infographics. The post 11 Ways to Visualize Changes Over Time : A Guide offers a good starting point for creating useful data presentations.

    I still subscribe to and eagerly read Flowing Data. But I might not have as much use for data visualization now that Mans is on FATE duty.

  • HLS MP4 Independent Segments

    18 juillet 2017, par Mido

    Long story short : Why HLS can’t just play normal MP4 files together one after one ? Why need to segment media file into .ts segments ?

    Details :

    We’ve segmented MP4 file into mini MP4 segments (not TS), each one about 30 seconds for testing. It never plays in any HLS player, just loading all segment files then nothing happens.

    Example MP4 segment Info :

    Format                      : MPEG-4
    
Format profile              : Base Media
    
Codec ID                    : isom
    
File size                   : 1.44 MiB
    
Duration                    : 32s 950ms
    
Overall bit rate            : 366 Kbps
    
Writing application         : Lavf56.25.101
    

    
Video
    
ID                          : 1
    
Format                      : AVC
    
Format/Info                 : Advanced Video Codec
    
Format profile              : High@L4.1
    
Format settings, CABAC      : Yes
    
Format settings, ReFrames   : 6 frames
    
Codec ID                    : avc1
    
Codec ID/Info               : Advanced Video Coding
    
Duration                    : 32s 950ms
    
Bit rate                    : 230 Kbps
    
Width                       : 426 pixels
    
Height                      : 240 pixels
    
Display aspect ratio        : 16:9
    
Original display aspect rat : 16:9
    
Frame rate mode             : Constant
    
Frame rate                  : 23.976 fps
    
Color space                 : YUV
    
Chroma subsampling          : 4:2:0
    
Bit depth                   : 8 bits
    
Scan type                   : Progressive
    
Bits/(Pixel*Frame)          : 0.094
    
Stream size                 : 925 KiB (63%)
    
Writing library             : x264 core 142 r2495 6a301b6
    

    
Audio
    
ID                          : 2
    
Format                      : AAC
    
Format/Info                 : Advanced Audio Codec
    
Format profile              : LC
    
Codec ID                    : 40
    
Duration                    : 32s 896ms
    
Bit rate mode               : Constant
    
Bit rate                    : 129 Kbps
    
Channel(s)                  : 2 channels
    
Channel(s)_Original         : 6 channels
    
Channel positions           : Front: L C R, Side: L R, LFE
    
Sampling rate               : 48.0 KHz
    
Compression mode            : Lossy
    
Stream size                 : 517 KiB (35%)

    The Master M3U8 :

    #EXTM3U
    
#EXT-X-VERSION:7
    
#EXT-X-INDEPENDENT-SEGMENTS
    

    
#EXT-X-STREAM-INF:RESOLUTION=426x240,BANDWIDTH=370000,CODECS="avc1.640015,mp4a.40.2"
    
240p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=640x360,BANDWIDTH=580000,CODECS="avc1.640015,mp4a.40.2"
    
360p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=896x504,BANDWIDTH=900000,CODECS="avc1.640015,mp4a.40.2"
    
480p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=1280x720,BANDWIDTH=1500000,CODECS="avc1.640015,mp4a.40.2"
    
720p.m3u8

    240p.m3u8

    #EXTM3U
    
#EXT-X-VERSION:7
    
#EXT-X-MEDIA-SEQUENCE:0
    
#EXT-X-PLAYLIST-TYPE:VOD
    
#EXT-X-TARGETDURATION:34
    

    
#EXTINF:33.033033,
    
240p000.mp4
    
#EXTINF:33.533534,
    
240p001.mp4
    
#EXTINF:24.941608,
    
240p002.mp4
    
#EXTINF:28.611945,
    
240p003.mp4
    
#EXT-X-ENDLIST

    When tested with HLS.js, gives this error :

    Parsing Error:no demux matching with content found,cannot recover,
    last media error recovery failed ...

    Bitmovin Player : loads all segments of all variants and never plays any of them. just stop.

    Tested on Chrome & Firefox On Windows, Safari on Mac, Android and iPad Browsers. Never works on any of them. Are we doing anything wrong ?!

  • HLS MP4 Independent Segments

    7 décembre 2016, par Mido

    Long story short : Why HLS can’t just play normal MP4 files together one after one ? Why need to segment media file into .ts segments ?

    Details :

    We’ve segmented MP4 file into mini MP4 segments (not TS), each one about 30 seconds for testing. It never plays in any HLS player, just loading all segment files then nothing happens.

    Example MP4 segment Info :

    Format                      : MPEG-4
    
Format profile              : Base Media
    
Codec ID                    : isom
    
File size                   : 1.44 MiB
    
Duration                    : 32s 950ms
    
Overall bit rate            : 366 Kbps
    
Writing application         : Lavf56.25.101
    

    
Video
    
ID                          : 1
    
Format                      : AVC
    
Format/Info                 : Advanced Video Codec
    
Format profile              : High@L4.1
    
Format settings, CABAC      : Yes
    
Format settings, ReFrames   : 6 frames
    
Codec ID                    : avc1
    
Codec ID/Info               : Advanced Video Coding
    
Duration                    : 32s 950ms
    
Bit rate                    : 230 Kbps
    
Width                       : 426 pixels
    
Height                      : 240 pixels
    
Display aspect ratio        : 16:9
    
Original display aspect rat : 16:9
    
Frame rate mode             : Constant
    
Frame rate                  : 23.976 fps
    
Color space                 : YUV
    
Chroma subsampling          : 4:2:0
    
Bit depth                   : 8 bits
    
Scan type                   : Progressive
    
Bits/(Pixel*Frame)          : 0.094
    
Stream size                 : 925 KiB (63%)
    
Writing library             : x264 core 142 r2495 6a301b6
    

    
Audio
    
ID                          : 2
    
Format                      : AAC
    
Format/Info                 : Advanced Audio Codec
    
Format profile              : LC
    
Codec ID                    : 40
    
Duration                    : 32s 896ms
    
Bit rate mode               : Constant
    
Bit rate                    : 129 Kbps
    
Channel(s)                  : 2 channels
    
Channel(s)_Original         : 6 channels
    
Channel positions           : Front: L C R, Side: L R, LFE
    
Sampling rate               : 48.0 KHz
    
Compression mode            : Lossy
    
Stream size                 : 517 KiB (35%)

    The Master M3U8 :

    #EXTM3U
    
#EXT-X-VERSION:7
    
#EXT-X-INDEPENDENT-SEGMENTS
    

    
#EXT-X-STREAM-INF:RESOLUTION=426x240,BANDWIDTH=370000,CODECS="avc1.640015,mp4a.40.2"
    
240p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=640x360,BANDWIDTH=580000,CODECS="avc1.640015,mp4a.40.2"
    
360p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=896x504,BANDWIDTH=900000,CODECS="avc1.640015,mp4a.40.2"
    
480p.m3u8
    

    
#EXT-X-STREAM-INF:RESOLUTION=1280x720,BANDWIDTH=1500000,CODECS="avc1.640015,mp4a.40.2"
    
720p.m3u8

    240p.m3u8

    #EXTM3U
    
#EXT-X-VERSION:7
    
#EXT-X-MEDIA-SEQUENCE:0
    
#EXT-X-PLAYLIST-TYPE:VOD
    
#EXT-X-TARGETDURATION:34
    

    
#EXTINF:33.033033,
    
240p000.mp4
    
#EXTINF:33.533534,
    
240p001.mp4
    
#EXTINF:24.941608,
    
240p002.mp4
    
#EXTINF:28.611945,
    
240p003.mp4
    
#EXT-X-ENDLIST

    When tested with HLS.js, gives this error :

    Parsing Error:no demux matching with content found,cannot recover,
    last media error recovery failed ...

    Bitmovin Player : loads all segments of all variants and never plays any of them. just stop.

    Tested on Chrome & Firefox On Windows, Safari on Mac, Android and iPad Browsers. Never works on any of them. Are we doing anything wrong ?!

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