[mythtv-commits] Ticket #10007: Video lags audio (sync) by ~400ms on hd pvr 1212 h264 recordings (only) after firmware update.

[MythTV]

#10007: Video lags audio (sync) by ~400ms on hd pvr 1212 h264 recordings (only)
after firmware update.
-------------------------------------+-------------------------
 Reporter:  gdelx001@…               |          Owner:  danielk
     Type:  Bug Report - General     |         Status:  new
 Priority:  minor                    |      Milestone:  unknown
Component:  MythTV - Video Playback  |        Version:  0.24.1
 Severity:  medium                   |     Resolution:
 Keywords:  video lag sync           |  Ticket locked:  0
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Comment (by tralph):

 gdelx001,

 Could you report which version of the HD-PVR firmware you are using? This
 is output by the driver when initialized in the kernel logs.

 The reason myth has an issue is that the video contains bad pts timestamps
 which we prefer now. If the code is changed to use dts timestamps for AV
 sync then it plays properly.

 It's not possible for the code to know that the pts timestamps are wrong
 so we'll have to decide if moving back to dts is worth the trade off. In
 the end it's not the fault of myth but the HD-PVR. IIRC, older firmware
 did produce bad pts timestamps.

 And the reason vlc plays it back properly is that it uses dts timestamps.

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Ticket URL: <http://code.mythtv.org/trac/ticket/10007#comment:11>
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