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PODirectShow stop/resume live stream
 

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    <p>I'm using DirectShow to play audio/video files in my application. I use <a href="http://msdn.microsoft.com/en-us/library/dd390090(VS.85).aspx" rel="nofollow noreferrer">IGraphBuilder::RenderFile()</a> to build the filter graph and the <a href="http://msdn.microsoft.com/en-us/library/dd390170(VS.85).aspx" rel="nofollow noreferrer">IMediaControl</a> interface to play/pause/stop the media. This works fine for local media files, but causes problems with live mms streams.</p> <p>If I call <a href="http://msdn.microsoft.com/en-us/library/dd390178(VS.85).aspx" rel="nofollow noreferrer">IMediaControl::Stop()</a> on a live stream, the stream will stop playing as expected. However, if I call <a href="http://msdn.microsoft.com/en-us/library/dd390177(VS.85).aspx" rel="nofollow noreferrer">IMediaControl::Run()</a> to resume the stream, nothing happens. The graph generates an EC_COMPLETE event, but the video does not play anymore.</p> <p>Calling <a href="http://msdn.microsoft.com/en-us/library/dd390175(VS.85).aspx" rel="nofollow noreferrer">IMediaControl::Pause()</a> followed by <a href="http://msdn.microsoft.com/en-us/library/dd390177(VS.85).aspx" rel="nofollow noreferrer">IMediaControl::Run()</a> will resume the stream where it left off, but will eventually stop. It seems to just playback the data that was in the buffer when <a href="http://msdn.microsoft.com/en-us/library/dd390175(VS.85).aspx" rel="nofollow noreferrer">IMediaControl::Pause()</a> was called, instead of re-syncing with the live stream.</p> <p>Does anybody know how to resume playing a live stream without destroying and rebuilding the filter graph?</p>
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    1. CODo you know what filters are being added to the graph?
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    2. COGraphEdit shows "ASF ACM Handler" + "WMAudio Decoder DMO" filters for audio and "ASF ICM Handler" + "WMVideo Decoder DMO" filters for video. I have the same problem stopping and resuming the stream using the "Render URL" option in GraphEdit. I'm using the Sky News live feed for testing (mms://live1.wm.skynews.servecast.net/skynews_wmlz_live300k)
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    3. COHave you tried IMediaControl::Pause() instead of ::Stop()? This might or might not work depending on the implementation of the source or any of the filters, and it also depends on the properties of the stream.
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