DVD Menu looped audio plays too fast

[Marc Randolph <mrand@…>]

Reported by mythbuntu user:

I have at least 2 DVD ISOs that worked fine under Jaunty and myth 0.21 that now have audio messed up at the DVD Menu.

The samples I played are from Robot Chicken Season 1 & 2. At the DVD Menu, there's an audio track that plays that's about one and a half minutes long and then it loops. Under karmic/mythtv trunk, the audio plays fine for 5-10 seconds and then plays really fast for 3-5 seconds and then stops. I can't tell if it plays through the whole track or if something just stops while going fast. The track no longer loops (no audio at menu anymore). From what I can tell, selecting episodes still plays them properly with audio and video being synced. I played an episode for about 2 minutes to make sure.

The machine's hardware is the same between running 0.21 and 0.22/trunk except for a replaced NIC.

[mike_hurley_1@…]

I'm the user that entered the defect in mythbuntu. Let me know if you need anything else.

[robertm]

Mike,

Frontend logs illustrating the problem with -v playback would likely be informative.

[mike_hurley_1@…]

mythfrontend -v playback output after sitting at the DVD menu for about 20 seconds

[mike_hurley_1@…]

A continuation of the other log file. This one includes picking an episode and playing for a couple minutes. TV was in use, so this was all done via VNC so let me know if you need a rerun.

[mike_hurley_1@…]

Another log playing another DVD's menu and 15 seconds of an episode.

[anonymous]

The logs I attached are from Robot Chicken, Season 1 Disc 1 (first 2 logs) and Season 2 Disc 1 (anotherdisc log). Replaying to get the logs, S1D1 had the behavior as initially described. S2D1 kept playing fast and didn't stop like it had previously. I'm wondering if it's playing fast or just sounds garbled, but I really can't tell.

[mike_hurley_1@…]

Another disc's log. Same problem. This is a different show, different DVD publisher.

[mike_hurley_1@…]

The anotherdisc and thirddisc logs were run without VNC running.

[skamithi]

i see what the problem is..it occurs when the video is paused but it is not in a dvd still frame and the audio continues. In this case I'm not sure why its exiting from DVD still frame mode but still pausing the video..Guess i may need to tweak the dvd still frame detection some more after all the recent audio/ffmpeg changes. can you send the "-v playback,extra" output from "Season 2 Disc 1" when playing the dvd menu. Note this will produce *a lot* of output. please exit mythtv as soon as the audio fades away.

[mike_hurley_1@…]

playback,extra log of S1D1 up until a couple seconds after the audio cuts out.

[mike_hurley_1@…]

S2D1 for about 15-20 seconds after the audio started going fast/getting garbled. This one didn't stop and to limit size I didn't wait. Longer looping track?

[mike_hurley_1@…]

While getting these logs I've also noticed this message apparently output to stderr since I redirect stdout.

libdvdread: Encrypted DVD support unavailable.

Why does it think my unencrypted DVD ISO is encrypted? Is this just a general warning?

Also, when I grabbed S2D1's playback,extra log, this also was on stderr.

Error in my_thread_global_end(): 1 threads didn't exit
(I didn't notice this message earlier)

[Marc Randolph <mrand@…>]

Another log with just -v playback is here:

​http://launchpadlibrarian.net/32204389/mf-v.log

This one may or may not be a related problem:

"audio will play fine for a few seconds then get really fast. Eventually the video will go really fast as well. This isn't in the menu though"

If it needs a new ticket and/or also needs -v playback,extra just say the word.

[skamithi]

potential fix for the problem. have no time to test it. waiting for feedback.

[skamithi]

mike_hurley: pls test the attached patch

[skamithi]

(In [22120]) Closes #7113. internal dvd player: recent dvd code updates in trunk didn't account for dvd still frame with audio. made the necessary changes to resolve this. tested fix on lord of rings (the two towers) special features dvd.

[mike_hurley_1@…]

I was able to try this fix out last night. The problem mostly seems fixed. Audio doesn't get garbled after a few seconds anymore and keeps playing properly after sitting there a bit.

I'll see if I can get some logs of this, but can you test some of your DVDs/ISOs and try using the menu? I thought I had it pretty repeatable until I tried -v playback,extra and then it always behaved properly.

It seems sometimes the first time I go into any ISO the background looks ok and audio plays ok but the menu is unusable. Actually the whole remote is unusable as I'm unable to go back to the video listing. My irexec events still work so I'm easily able to reboot the machine. After reboot, usually the file that was a problem before will work ok. If the first ISO I go into has no problems, any tried after it never seem to have problems that I remember.

[skamithi]

bad code fix. user on mythtv-dev reported that this patch is causing dvd playback issues. will consult the user on mythtv-dev list who reported the problem to test new patches that will resolve the audio problem reported in this ticket and not cause any dvd playback issues.

[skamithi]

reports on mythtv-dev show that this patch had nothing to do with dvd playback issues. closing the ticket.