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• New WebM Products and Projects

  2 juillet 2010, par noreply@blogger.com (John Luther)

  Some cool uses of WebM have come online recently :

  • a native VP8 decoder in FFmpeg

  
  

  • a VP8 decoder in Java

  
  

  • WebM encoding in the Firefogg add-on for Firefox

  
  

  • WebM playback in Media Player Classic - Home Cinema

  
  

  

• 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>

• Presentation on the HTML5 video tag

  29 avril 2010

  A few weeks back, I was given the opportunity to present at MinneWebcon. My talk, "<video> will be your friend" focused on the legal issues and implementation possibilities surrounding the HTML5 video tag.

  I’ve put my slides online, if you want to take a look. I’ve also recorded the first half the of the lecture as part of a test of our Mocha class capture application. I’ll be recording the second half Real Soon Now.

  HTML5 Video Presentation

  View more presentations from sith33.