Opened 9 years ago

Closed 8 years ago

#9650 closed Bug Report - General (Upstream Bug)

playback of 720p stutters on OSX frontend

Reported by: scram69@… Owned by: Janne Grunau
Priority: minor Milestone: unknown
Component: MythTV - Video Playback Version: 0.24-fixes
Severity: medium Keywords: osx playback
Cc: Ticket locked: no

Description

Playback of 720p recorded content (from HDHR) is affected by "Player(0): Video is 3.xxxxx frames behind audio (too slow), dropping frame to catch up" messages every few milliseconds on the OS X frontend. Playback of 1080i content is unaffected. Frontend binary built 03/02/11 and downloaded from sourceforge: 0.24-fixes-intel-10.6v0.24-198-g0d3d3a4-dirty.dmg Logs attached: 720p -v libav,playback: mfe720p.txt 1080i -v libav,playback: mfe1080i.txt

Attachments (2)

mfelog720p.txt (32.0 KB) - added by scram69@… 9 years ago.
mfelog1080i.txt (18.5 KB) - added by scram69@… 9 years ago.

Download all attachments as: .zip

Change History (6)

Changed 9 years ago by scram69@…

Attachment: mfelog720p.txt added

Changed 9 years ago by scram69@…

Attachment: mfelog1080i.txt added

comment:1 in reply to:  description Changed 9 years ago by scram69@…

I have been able to test both a 720p display as well as a 1080 display (1680x1050 LCD monitor). The "dropping frame" messages only appear when displaying to a 720p display; playback is normal on the 1080 display.

comment:2 Changed 9 years ago by scram69@…

It was recently pointed out on the users list http://www.gossamer-threads.com/lists/mythtv/users/477828#477828 that this issue is tied to the Nvidia GPU. I did some testing myself and found that my conclusion about the display resolution in the above comment was not correct. In fact, the mini with the older Intel GMA950 (originally connected to the LCD monitor) get smooth 720p playback regardless of display. The newer mini, with the Nvidia GPU, generates the dropping frame messages during 720p playback.

Surprising, since Nvidia GPU's are typically recommended for MythTV. I have one in my Ubuntu 10.10 frontend and it works flawlessly.

comment:3 Changed 9 years ago by scram69@…

With 10.6.7, Apple has released updated NVIDIA drivers (but only for the MacBook? Pro). Following the directions from this users list post: http://www.gossamer-threads.com/lists/mythtv/users/478654#478654 to extract the drivers from that update and install them fixed the issue on my 2009 NVIDIA mini.

comment:4 Changed 8 years ago by Raymond Wagner

Resolution: Upstream Bug
Status: newclosed

Resolved by driver update.

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