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  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

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  • ARM compiler update

    15 janvier 2010, par Mans — ARM, Compilers

    Since my last shootout, all the tested vendors have updated their compilers. Here is a quick update on each of them.

    Both the 4.3 and 4.4 branches of FSF GCC have had bugfix releases, bringing them to 4.3.4 and 4.4.2, respectively. Neither update contains anything particularly noteworthy.

    The CodeSourcery 2009q3 release sees an update to a GCC 4.4 base, a significant change from the 4.3 base used in 2009q1. The update is a mixed blessing. In fact, it is mostly a curse and hardly a blessing at all. On the bright side, the floating-point speed regressions in 2009q1 are gone, 2009q3 being a few per cent faster even than 2007q3. Unfortunately, this improvement is completely overshadowed by a major speed regression on integer code, a whopping 24% in one case. This ties in with the slowdown previously observed with FSF GCC 4.4 compared to 4.3.

    ARM RVCT 4.0 is now at Build 697. This update fixes some bugs and introduces others. Notably, it no longer builds FFmpeg correctly. The issue has been reported to ARM.

    Texas Instruments, finally, have made a formal release, v4.6.1, of their TMS470 compiler incorporating various fixes allowing it to build a moderately patched FFmpeg. The performance remains somewhere between GCC and RVCT on average.

    In light of the above, my recommendations remain unchanged :

    • For a free compiler, choose CodeSourcery 2009q1. It beats GCC 4.3.4 by 5-10% in most cases.
    • GNU purists are best served by GCC 4.3.4, which is up to 20% faster than 4.4.2 and rarely slower.
    • When price is not a concern, ARM RCVT is a good option, outperforming GCC by up to a factor 2.
    • In all cases, disable any auto-vectorisation features.

    Regardless of which compiler is chosen, I cannot overstress the importance of testing. All compilers are crawling with bugs, and even the most innocent-looking code change can trigger one of them. When using a compiler other than GCC, extra caution is advised considering a lot of code is developed using only GCC and may thus fall prey to bugs unique to said other compiler.

  • XDCam EX gets some friends

    21 octobre 2009

    Sony has announced a couple new additions to the XDCamEX family - the PMW-350 and the PMW-EX1R.

    The 350 is a shouldermount camera with interchangeable lenses and 2/3" chips. That puts it somewhere between the 1/2" PDW-F355 and the 2/3" 4:2:2 PDW-700.

    Sony Pmw-350 Angle Med

    The EX1R is a minor bump to the EX1, adding features that users have asked for, like a dedicated viewfinder and a DVCam recording mode.

    For me, the most interesting bit of news is that Sony is launching the "MEAD-MS01," an SXS to MemoryStick adapter. I guess Sony noticed that many EX1 and EX3 users have been using SD adapters, and decided to get into that market. And of course, they had to use everyone’s least favorite flash format, Memorystick. I’ll stick to my SD cards for now, but it’s nice to see Sony "legitimize" that recording option a bit.

  • Podcast Producer 2 REST api

    11 septembre 2009

    I’ve been working on documenting the REST api that PCP2 uses for client server communication as part of a new project. I thought it might be useful to other folks. Consider this a work in progress - I’ve only documented the workflow for doing a multisource recording so far. Follow the job for the info.

    Each section gives a sample command and a sample response.

    All pages are behind basic HTTP auth.

    General sequence of events

    * get workflow list
    * get cameras
    * request status for camera (including thumbnail)
    * start cameras
    * create recording enclosure
    * stop cameras, provide submission_UUID returned by above step, include title

    *URL : https://pcpserver:8170/podcastproducer/info

    *Type : GET

    *Content : version=2

    *Response :
    <pre>
    <podcast_producer_result>
    <action>index</action>
    <status>success</status>
    <plist version="1.0">
    <dict>
    <key>server_version</key>
    <string>2.0</string>
    <key>http_auth_type</key>
    <array>
    <string>basic</string>
    <string>digest</string>
    <string>kerberos</string>
    </array>
    <key>krb_service_principals</key>
    <array>
    <string>pcast/x101-186-103-dhcp.cla.umn.edu@X101-186-103-DHCP.CLA.UMN.EDU</string>
    </array>
    <key>server_uuid</key>
    <string>DB31DA49-10AE-472C-B3B9-86A8F8112399</string>
    <key>cluster_members</key>
    <dict>
    <key>F1021B98-7E7E-44FB-8EB1-E0DA1885D5BA</key>
    <dict>
    <key>date_added</key>
    <string>Tue Sep 01 10:23:49 -0500 2009</string>
    <key>last_update</key>
    <string>Tue Sep 08 10:35:17 -0500 2009</string>
    <key>server_host</key>
    <string>x101-186-103-dhcp.cla.umn.edu</string>
    <key>server_port</key>
    <string>8170</string>
    <key>tunnel_agent_host</key>
    <string>x101-186-103-dhcp.cla.umn.edu</string>
    <key>tunnel_agent_port</key>
    <string>8175</string>
    <key>network_addrs</key>
    <array>
    <string>128.101.186.103</string>
    </array>
    </dict>
    </dict>
    </dict>
    </plist>
    </podcast_producer_result>
    </pre>

    * URL : https://pcpserver:8170/podcastproducer/workflows
    * Type : GET
    * Content : version=2&language=en
    * Response :
    <pre>
    <podcast_producer_result>
    <action>index</action>
    <status>success</status>
    <results>OK</results>
    <plist version="1.0">
    <dict>
    <key>user_fullname</key>
    <string>podcast</string>
    <key>user_shortname</key>
    <string>podcast</string>
    <key>workflows</key>
    <array>
    <dict>
    <key>name</key>
    <string>Montage</string>
    <key>title</key>
    <string>Montage</string>
    <key>description</key>
    <string>Montage workflow</string>
    <key>uuid</key>
    <string>F797D54D-1539-42AA-B6AC-3CB3A4C15EF5</string>
    <key>version</key>
    <string>2.0</string>
    <key>editor</key>
    <string>Podcast Composer</string>
    <key>sources</key>
    <array>
    <dict>
    <key>contentTypes</key>
    <array>
    <string>com.apple.quicktime-movie</string>
    <string>com.adobe.pdf</string>
    <string>com.apple.iwork.keynote.key</string>
    <string>com.apple.iwork.pages.pages</string>
    <string>org.openxmlformats.wordprocessingml.document</string>
    <string>com.microsoft.word.doc</string>
    <string>org.openxmlformats.presentationml.presentation</string>
    <string>com.microsoft.powerpoint.ppt</string>
    <string>com.microsoft.bmp</string>
    <string>com.compuserve.gif</string>
    <string>public.jpeg-2000</string>
    <string>public.jpeg</string>
    <string>com.adobe.pdf</string>
    <string>com.apple.pict</string>
    <string>public.png</string>
    <string>com.adobe.photoshop-image</string>
    <string>com.sgi.sgi-image</string>
    <string>com.truevision.tga-image</string>
    <string>public.tiff</string>
    </array>
    <key>description</key>
    <string>Any Document</string>
    <key>isFolder</key>
    <true/>
    <key>isOptional</key>
    <false/>
    <key>sourceTypes</key>
    <array>
    <string>File</string>
    </array>
    </dict>
    </array>
    <key>user_requirements</key>
    <array>
    <string>Title</string>
    <string>Description</string>
    </array>
    <key>access_control_entries</key>
    <array>
    </array>
    </dict>
    <dict>
    <key>name</key>
    <string>Single Source</string>
    <key>title</key>
    <string>Single Source</string>
    <key>description</key>
    <string>Single Source workflow</string>
    <key>uuid</key>
    <string>DEFA1587-A650-426E-92DA-01C5EB811705</string>
    <key>version</key>
    <string>2.0</string>
    <key>editor</key>
    <string>Podcast Composer</string>
    <key>sources</key>
    <array>
    <dict>
    <key>contentTypes</key>
    <array>
    <string>com.apple.quicktime-movie</string>
    </array>
    <key>description</key>
    <string>Any Video</string>
    <key>isFolder</key>
    <false/>
    <key>isOptional</key>
    <false/>
    <key>sourceTypes</key>
    <array>
    <string>Video</string>
    <string>Screen</string>
    <string>Audio</string>
    <string>File</string>
    </array>
    </dict>
    </array>
    <key>user_requirements</key>
    <array>
    <string>Title</string>
    <string>Description</string>
    </array>
    <key>access_control_entries</key>
    <array>
    </array>
    </dict>
    </array>
    </dict>
    </plist>
    </podcast_producer_result>
    </pre>
    ----

    * URL : https://pcpserver:8170/podcastproducer/cameras
    * Type : GET
    * Content : version=2
    * Response :
    <pre>
    <podcast_producer_result>
    <action>index</action>
    <status>success</status>
    <plist version="1.0">
    <dict>
    <key>cameras</key>
    <array>
    <dict>
    <key>name</key>
    <string>150-A Camera</string>
    <key>uuid</key>
    <string>307682A5-B552-4AFA-B7E2-3811D772C9A1</string>
    <key>connected_to_member_uuid</key>
    <string>F1021B98-7E7E-44FB-8EB1-E0DA1885D5BA</string>
    <key>in_use</key>
    <string>false</string>
    <key>recording_status</key>
    <string>online</string>
    <key>preview_url</key>
    <string>https://x101-186-103-dhcp.cla.umn.edu:8170/podcastproducer/previews/307682A5-B552-4AFA-B7E2-3811D772C9A1.jpg</string> ;
    <key>access_control_entries</key>
    <array>
    </array>
    </dict>
    <dict>
    <key>name</key>
    <string>150-A Epiphan</string>
    <key>uuid</key>
    <string>CE610AB0-CA50-49EB-8FFE-78E57CDCA550</string>
    <key>connected_to_member_uuid</key>
    <string>F1021B98-7E7E-44FB-8EB1-E0DA1885D5BA</string>
    <key>in_use</key>
    <string>false</string>
    <key>recording_status</key>
    <string>online</string>
    <key>preview_url</key>
    <string>https://x101-186-103-dhcp.cla.umn.edu:8170/podcastproducer/previews/CE610AB0-CA50-49EB-8FFE-78E57CDCA550.jpg</string> ;
    <key>access_control_entries</key>
    <array>
    </array>
    </dict>
    </array>
    </dict>
    </plist>
    </podcast_producer_result>
    </pre>

    * URL : https://pcpserver:8170/podcastproducer/cameras/start
    * Type : POST
    * Content : action=pause&version=2&camera_name=150-A%20Camera&controller=cameras
    * Response :
    <pre>
    <podcast_producer_result>
    <action>start</action>
    <status>success</status>
    <results>OK</results>
    </podcast_producer_result>
    </pre>

    * URL : https://pcpserver:8170/podcastproducer/cameras/status
    * Type : POST
    * Content : delay=0&action=start&version=2&camera_name=150-A%20Epiphan&controller=cameras
    * Response :
    <pre><podcast_producer_result>
    <action>status</action>
    <status>success</status>
    <results>OK</results>
    <plist version="1.0">
    <dict>
    <key>preview</key>
    <string>https://x101-186-103-dhcp.cla.umn.edu:8170/podcastproducer/previews/307682A5-B552-4AFA-B7E2-3811D772C9A1.jpg</string> ;
    <key>preview_image_data</key>
    <string>RAW JPEG DATA RAW JPEG DATA RAW JPEG DATA RAW JPEG DATA RAW JPEG DATA</string>
    <key>recording_status</key>
    <string>online</string>
    <key>started_at</key>
    <string>Tue Sep 08 09:31:40 -0500 2009</string>
    <key>stopped_at</key>
    <string>Tue Sep 08 09:32:10 -0500 2009</string>
    <key>elapsed</key>
    <string>41</string>
    <key>last_error</key>
    <string>805306368</string>
    </dict>
    </plist>
    </podcast_producer_result>
    </pre>

    * URL : https://pcpserver:8170/podcastproducer/cameras/pause
    * Type : POST
    * Content : action=pause&version=2&camera_name=150-A%20Camera&controller=cameras
    * Response :
    <pre><podcast_producer_result>
    <action>status</action>
    <status>success</status>
    <results>OK</results>
    <plist version="1.0">
    <dict>
    <key>preview</key>
    <string>https://x101-186-103-dhcp.cla.umn.edu:8170/podcastproducer/previews/307682A5-B552-4AFA-B7E2-3811D772C9A1.jpg</string> ;
    <key>recording_status</key>
    <string>online</string>
    <key>started_at</key>
    <string>Tue Sep 08 09:31:40 -0500 2009</string>
    <key>stopped_at</key>
    <string>Tue Sep 08 09:32:10 -0500 2009</string>
    <key>elapsed</key>
    <string>41</string>
    <key>last_error</key>
    <string>805306368</string>
    </dict>
    </plist>
    </podcast_producer_result></pre>

    * URL : https://pcpserver:8170/podcastproducer/cameras/stop
    * Type : POST
    * Content : workflow_name=&UserMetadata_Description=&submission_uuid=7497E3AC-0A75-4C7C-8C66-26294C9274FE&action=stop&version=2&camera_name=150-A%20Epiphan&controller=cameras&UserMetadata_Title=Test123
    * Response :
    <pre><podcast_producer_result>
    <action>stop</action>
    <status>success</status>
    <results>OK</results>
    </podcast_producer_result>
    </pre>

    * URL : https://pcpserver:8170/podcastproducer/recordings/create
    * Type : POST
    * Content : version=2&workflow_uuid=C6EF52A7-04E3-477D-9F38-6B61F108D7B9
    * Response :
    <pre>
    <podcast_producer_result>
    <action>create</action>
    <status>success</status>
    <results>OK</results>
    <plist version="1.0">
    <dict>
    <key>workflow_uuid</key>
    <string>C6EF52A7-04E3-477D-9F38-6B61F108D7B9</string>
    <key>recording_uuid</key>
    <string>FD5A1459-F7CE-41FA-8155-049DF774298B</string>
    <key>submission_uuids</key>
    <array>
    <string>A626D8E4-E439-4E57-9982-DB4BD035CB41</string>
    <string>CFBCCB74-A41F-42D3-BEAA-58165B1116C6</string>
    </array>
    </dict>
    </plist>
    </podcast_producer_result>
    </pre>

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