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MediaPortal 1
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Audio sync problems when screen set to 24 Hz
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<blockquote data-quote="tourettes" data-source="post: 483687" data-attributes="member: 10858"><p>MP uses vsync on always.</p><p></p><p>[code]presentParams.PresentationInterval = PresentInterval.Default;[/code]</p><p></p><p>Takes care of it, i.e. DirectX is responsible for the vsync matching. (Requires either EVR + AERO on Vista or Exclusive DirectX mode on XP).</p><p></p><p>One possibility for the audio drifting could be 23.xxx and 24Hz. Maybe drivers arent handling such small difference correctly? i.e. running video on 24Hz when it actually is 23.xxx could cause the display drivers to lock every video frame to display refresh rate, but the audio would drift slowly) </p><p></p><p>Just a quess, as I still cannot test this issue on my own HW.</p></blockquote><p></p>
[QUOTE="tourettes, post: 483687, member: 10858"] MP uses vsync on always. [code]presentParams.PresentationInterval = PresentInterval.Default;[/code] Takes care of it, i.e. DirectX is responsible for the vsync matching. (Requires either EVR + AERO on Vista or Exclusive DirectX mode on XP). One possibility for the audio drifting could be 23.xxx and 24Hz. Maybe drivers arent handling such small difference correctly? i.e. running video on 24Hz when it actually is 23.xxx could cause the display drivers to lock every video frame to display refresh rate, but the audio would drift slowly) Just a quess, as I still cannot test this issue on my own HW. [/QUOTE]
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Audio sync problems when screen set to 24 Hz
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