Last modified: 2014-02-28 22:40:09 UTC

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Bug 11252 - Cortado buffering is not robust and not sensitive to download speeds, bufferSize param does not appear to work.
Cortado buffering is not robust and not sensitive to download speeds, bufferS...
Product: Cortado
Classification: Unclassified
JST (Other open bugs)
All All
: Normal enhancement (vote)
: ---
Assigned To: Gregory Maxwell
Depends on:
  Show dependency treegraph
Reported: 2007-09-09 07:55 UTC by Gregory Maxwell
Modified: 2014-02-28 22:40 UTC (History)
4 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Description Gregory Maxwell 2007-09-09 07:55:16 UTC
Cortado buffers ahead of the file, but for most videos it does not buffer enough to capture the entire video. Seeking, and playing again often cause the file to reload, this should never happen for reasonably small files. For users on slow connections with high bitrate files it does not pre-buffer enough to play the file well.

It would be nice if at the first buffer underrun cortado estimated the transmission speed and then pre-buffered enough to make halt-free playback likely.  It would be impressive if the transmission speed estimate was saved in domstorage, userData, or cookie so that subsequent files experienced no timeouts while avoiding users of fast connections with unneeded pre-buffering delays.
Comment 1 Andre Klapper 2012-12-17 12:14:12 UTC
TimedMediaHandler was deployed at the beginning of November 2012, see and for more information.
It is based on HTML5 and supports closed captions, timed text, WebM, etc.

This bug report was reported about "Cortado". With TimedMediaHandler being in place, Cortado is now ONLY used as a fallback for web browsers that do not support any of the video codecs we offer but have Java installed. This currently is Apple Safari without XiphQt installed, or Microsoft Internet Explorer with Java applet installed. 

Please add a comment here in case that you still face the problem described (now with Cortado inside of TimedMediaHandler) if using one of the browsers mentioned above. In that case, this report should be moved to product="MediaWiki extensions" and component="TimedMediaHandler" in this bug tracker.

Issues that also happen with Cortado without TimedMediaHandler should be reported to instead.
Comment 2 Andre Klapper 2014-02-28 22:40:09 UTC
Wikimedia itself is currently not actively working on Cortado.
If you are still interested in seeing this, please check the existing upstream tickets at and if no ticket exists yet for this request, please create one in upstream. 

Also see comment 1 in this report for more explanation which way Wikimedia Multimedia currently takes. Closing as WONTFIX for Wikimedia itself.

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