[mythtv-users] Patches that improve mythcommflag accuracy

[Carl Hunter]

Can you be more specific about the "same results"?

Do you mean you still get the numerous decoding errors, not just the one at the end (which is normal), as well as no commercial marks?

Or do you mean no commercials are being detected, but not the numerous decoding errors?

I ask because I think they are two separate problems. I have done nothing to mythcommflag that would affect the "numerous decoding errors" problem and until that one is sorted out, I would not expect mythcommflag to be able to find any commercials. I was hoping that, by changing how the card is configured in mythtv-setup, it might fix the "numerous decoding errors" problem.

Is it safe to assume that when you say PVR-1600 you mean Hauppauge HVR-1600. Do recordings made on these tuners also have the "numerous decoding errors" problem?

FWIW, I did test some old PVR-150 recordings and my version of mythcommflag worked quite well. Using the same methodology I've been using to measure accuracy, I got 71% accuracy on a recording made in 2009 and 83% accuracy on one from 2011. These recordings were made on older kernels. So I'm thinking it's time for me to configure one of my HVR-1600 cards and see if I can reproduce the "numerous decoding errors" problem. But it's going to be a few days before I can do that. It may not lead anywhere, because I would be testing with a  different kernel (3.2 from mythbuntu 12.04 vs 3.13 from mythbuntu 14.04) as well as a different tuner, HVR-1600 vs PVR-150.

While I was at it, I tested a recording made on a framgrabber type tuner in 2010 (.nuv recording made on the analog side of a pcHDTV 5500 which has since died) and my mythcommflag found one commercial break. It doesn't make sense to give it an accuracy rating because the recording was from a public tv station which is commercial free.



Regards,
Helen

Yes, I still get the numerous decoding errors not just the one at the end.  My HD recordings show one error at the end but still detect commercials fine.  I'll look into changing the recording settings some more.  Your point about different kernels has me questioning things too.  I have a test box running Mythbuntu 11.10 with Myth 0.24 on it.  I'll see if I can update the kernel on that one and compare results.  

Yes, I'm using HVR-1600's.  Sorry for the typo.  When using the analog side of the card mythcommflag fails the same way on those recordings.  I also record using the S-Video and RCA inputs depending on the different set-ups I've got, not the "cable" input.  Not sure if that makes a difference with my recordings either.  I wonder if the part that "combines" the audio and video on these cards has changed with new kernel drivers.  

Thanks
Carl


   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20141029/949b8f4a/attachment-0001.html>