Topic: TV tuner rescan stops at channel 13 (Read 1983 times)

FCCincy · « **on:** December 16, 2024, 11:36:11 am »

I did a TV rescan after updating to MC33 and after scanning to 13 it jumped to 70 and showed scanning complete. I had 60 channels before the rescan and now only have one (CH12). I'm using a Hauppauge quadHD USB tuner with latest driver, 21JUNE2024. Computer is Win 11 Pro V24H2 updated 04DEC2024. I did a reinstall of MC33 on this computer, and did a fresh first time install on another computer that has same Win 11 Pro version and has same problem. The tuner works and scans correctly using the latest version of WinTV 10software that came with the USB tuner. Attached is the log file made after doing the rescan. Any help appreciated.

Yaobing · « **Reply #1 on:** December 16, 2024, 10:42:50 pm »

I am sorry that you are having issues. The channel scanning code has not been changed for years. I am really puzzled.

The log file shows the following:

We started with the lowest physical channel (2) and call SeekUp which would lock onto the next available channel.
For the first 8 or 9 such calls, we did not get any lock. Each time we checked the physical channel and it sequentially incremented, from 2 to 10.
The next SeekUp brought a lock, and its physical channel was 70! This gave you 5 subchannels, among which was CBS.
The next SeekUp ended in failure because there were no more channels above what was found.

You see, the system call SeekUp skipped a bunch of channels, going from channel 10 directly to channel 70.

FCCincy · « **Reply #2 on:** December 17, 2024, 06:40:54 am »

Thanks for checking it out. I think the CH70 scan brought up physical CH12, as that is correct for CBS. I had to edit the sub channels because they were on physical CH20.

Will a restore backup library from MC31 bring back the original channels? I made this backup before installing MC33. I already manually added many of the popular channels and don't want to lose them doing a library restore.

JimH · « **Reply #3 on:** December 17, 2024, 07:19:21 am »

Try powering your TV device off and back on, and then rescanning.

FCCincy · « **Reply #4 on:** December 17, 2024, 07:55:14 am »

I already took it a step further by installing MC33 on a different computer with an older dual Hauppauge tuner and it did the same thing. I wouldn't be surprised if the latest windows 11 24H2 update has something to do with it. Some of the other software on both computers have been doing little strange thing here and there after this update early December. I do have an old windows 7 computer I could test it out on if think it would help.

Yaobing · « **Reply #5 on:** December 17, 2024, 09:06:41 am »

Quote from: FCCincy on December 17, 2024, 06:40:54 am

Thanks for checking it out. I think the CH70 scan brought up physical CH12, as that is correct for CBS. I had to edit the sub channels because they were on physical CH20.

The scanned data have the following numbers: 70 (12-1), meaning it has physical channel 70, major channel 12, minor channel 1. You also have other channels with the same physical channel: 12-2, 12-3, 64-2, 64-3

Quote

Will a restore backup library from MC31 bring back the original channels? I made this backup before installing MC33. I already manually added many of the popular channels and don't want to lose them doing a library restore.

Yes it should. When you install MC33, the data should have been migrated. Doing a restore again should bring back the old data. Backup MC33 library first, so you will have your manually added channels saved somewhere.

Quote from: FCCincy on December 17, 2024, 07:55:14 am

I already took it a step further by installing MC33 on a different computer with an older dual Hauppauge tuner and it did the same thing. I wouldn't be surprised if the latest windows 11 24H2 update has something to do with it. Some of the other software on both computers have been doing little strange thing here and there after this update early December. I do have an old windows 7 computer I could test it out on if think it would help.

It will help deciding whether Windows updates were the calprit. It won't be conclusive as there is also the possibility of Hauppauge drivers doing it.

FCCincy · « **Reply #6 on:** December 18, 2024, 09:09:05 am »

I further tested by installing same MC33 on the Windows 7 computer, using the same Quad Hauppauge USB tuner and the channel scan worked correctly. I noticed the tuner driver was an older version from 2020 so I further tested by using this old driver on a Windows 11 computer with recent 24H2 update. This time doing the channel scan it went to CH14 then jumped to end. It didn't find the CBS station on physical channel 12, but did find a group of other stations on Physical Ch15. They wouldn't play (hung at "waiting for signal clock") because it showed physical Ch70 instead of 15, but did have the correct Major/Minor channel and TSID, so changing 70 to 15 got that group of channels to play.

The attached log is from the Windows 11 computer with Ch14 to end jump using the same Hauppauge driver as the Windows 7 computer that the auto scan worked correctly on. Hope this helps solve the mystery.

boozemun · « **Reply #7 on:** January 05, 2025, 09:10:22 pm »

Was using Hauppage 4 tuner pcie card scanning channels gets to 16 of 68 and then skips to 69 of 68 and has only found channel 48. I even bought the newer card before I realizd it is not the card it's Media Center because scanning with WinTV 10 finds them just fine with either card... . New card arrived today and still same behavior. Ive uninstalled and reinstalled Media Canter nothing helps

boozemun · « **Reply #8 on:** January 06, 2025, 03:46:39 am »

I have exact problem but mine skips from 16 of 68 to 69 of 68 finding only 5 channel 48s, even bought new version of the card same result.

Yaobing · « **Reply #9 on:** January 09, 2025, 10:18:31 am »

From all the info posted here, I suspect that the issue is caused by the Windows 11 update.

FCCincy · « **Reply #10 on:** January 09, 2025, 10:42:41 am »

Thanks for checking into it. I'm fine with just manually adding the channels using the channel manager and getting info from the https://www.rabbitears.info/ website to fill in the metrics. A new customer with this problem would have a hard time figuring this out, so should fix in a future build.

Yaobing · « **Reply #11 on:** January 09, 2025, 10:50:41 am »

Thanks. I will try finding a work-around, unless Microsoft gets it right.

Yaobing · « **Reply #12 on:** January 10, 2025, 01:51:01 pm »

Please try this DLL (JRTelevision.dll)

I switched to a different method of tuning. I hope it will make a difference.

FCCincy · « **Reply #13 on:** January 11, 2025, 11:02:52 am »

I tested it out this morning. Now it scans all channels, but when it finds a group of channels it jumps to Ch 68, but then jumps back to resume the scan where it left off. The channels would not play (hangs at "waiting for signal clock") because the physical channel is 70 for all results in the scan. The other metrics (Major/Minor channel, TSID, Audio/Video PID, Audio/Video Format) were all correct. Changing physical channel to correct got them to play.

I attached the Log file. The scan was done using the Hauppauge QuadHD USB tuner and the latest driver (June 2024). Hope this helps.

FCCincy · « **Reply #14 on:** January 11, 2025, 11:09:27 am »

Got an "Upload folder full" error. Will try to send the 234K log file again later.

FCCincy · « **Reply #15 on:** January 11, 2025, 11:21:32 am »

I have the same problem and have a separate post going on this with detailed info. Appears to be related to the Windows 11 24H2 update in December 2024. A work around at this time is to restore a previous library with a correct channel scan, or Manually add the ones you want using "TV Options/manage channels"). In USA/Canada, you can find the metrics on the https://www.rabbitears.info/ website.

boozemun · « **Reply #16 on:** January 11, 2025, 06:05:24 pm »

Thank you for the reply I'll check it out. That may be the issue but then why does WinTV and other apps I've tried scan just fine. Its a flaw in Media Center. I have uninstalled completely and whn I reinstall Media Center does not ask to import as it used to and my Libray is there as well as PLaylists and everything. How is that happening? I think that has somethjing to do with it. Tha channels are all there even though I have not imported my backup? If I try to rescan forget it same thing happens

boozemun · « **Reply #17 on:** January 11, 2025, 06:09:33 pm »

WinTV and other apps scan just fine it's only Media Center that is broken yet again so it may be a Microsoft issue but experience says probabvly not.

Yaobing · « **Reply #18 on:** January 11, 2025, 08:41:17 pm »

I will do more changes on Monday.

Yaobing · « **Reply #19 on:** January 11, 2025, 08:43:26 pm »

It is a flaw in MC only in the sense that MC uses that particular API function, which Microsoft might have broken. I am switching to a different method.

Yaobing · « **Reply #20 on:** January 11, 2025, 10:33:15 pm »

Quote from: boozemun on January 11, 2025, 06:05:24 pm

Thank you for the reply I'll check it out. That may be the issue but then why does WinTV and other apps I've tried scan just fine. Its a flaw in Media Center. I have uninstalled completely and whn I reinstall Media Center does not ask to import as it used to and my Libray is there as well as PLaylists and everything. How is that happening? I think that has somethjing to do with it. Tha channels are all there even though I have not imported my backup? If I try to rescan forget it same thing happens

You don't need to re-install MC. You just need to restore a previously backed-up library so previous channels can be restored. If you do not have any channels in the backup library, then restoring would not help.

boozemun · « **Reply #21 on:** January 11, 2025, 11:49:23 pm »

But why is it not deletinbg my preferences: Library, TV channels, media locations, etc when I uninstall? They are all still there.

boozemun · « **Reply #22 on:** January 12, 2025, 08:14:42 am »

Thanks please let us know. If I uninstall the app, removing preferences then reinstall it, it seems like all my Library, TV, etc is still there for some reason but when I try to watch any of those channels I get access denied?!

boozemun · « **Reply #23 on:** January 12, 2025, 08:52:09 am »

I replaced the DLL file which is what I guessed you meant me to do and now it went back and forth starting over at least 5 times but it did get all the channels eventually it just named them something long and weird. When I go to watch any of those channels it says Access Denied.

Yaobing · « **Reply #24 on:** January 12, 2025, 09:44:35 am »

Quote from: boozemun on January 11, 2025, 11:49:23 pm

But why is it not deletinbg my preferences: Library, TV channels, media locations, etc when I uninstall? They are all still there.

When you uninstall, you have options to keep the library and settings (default) or to remove them (not recommended unless you truly don't mind losing the data). Also even if you choose to remove the library and settings, upon re-installation MC might find data from previous versions and use them. All of this is designed to provide convenience and protection to users.

Yaobing · « **Reply #25 on:** January 12, 2025, 09:51:04 am »

I merged the two channel-scan threads.

boozemun · « **Reply #26 on:** January 12, 2025, 04:19:57 pm »

OK I have never told it to remove the Library files but I always checked clear registry and I have also used uninstall software in the past that removes all remnents. I always create a Library backup and it has never imported the Library or settings without me doing it manually... weird. Someone here told me to try that for a different issue a while back because of the many times this software has become unusable for weeks or months at a time. So your DLL worked for scanning but now I can't play any TV live or recorded. Access Denied.

Thanks for your help.

Yaobing · « **Reply #27 on:** January 12, 2025, 06:45:22 pm »

As FCCincy mentioned, the new DLL allowed the scanning to go through, but got the physical channels wrong. That was why you could not play the channels. I will make more changes tomorrow to fix that, and will let you try a new version of the DLL.

boozemun · « **Reply #28 on:** January 12, 2025, 07:13:55 pm »

Thank you it turns out I was wrong. The recorded files I can play.

JimH · « **Reply #29 on:** January 13, 2025, 01:16:32 am »

Don't use any other software to uninstall or to "clean" the registry. It may be the source of some of your problems.

Yaobing · « **Reply #30 on:** January 13, 2025, 11:33:39 am »

Here we go. Please try this new JRTelevision.dll.

FCCincy · « **Reply #31 on:** January 13, 2025, 06:44:45 pm »

Just tried it and everything scanned perfectly. I attached log of successful scan for Ref.

Yaobing · « **Reply #32 on:** January 13, 2025, 10:29:28 pm »

Thanks for reporting back.

boozemun · « **Reply #33 on:** January 14, 2025, 01:53:09 am »

Thanks I tried that... twice scanned... the second time I checked the three boxes to remove old channel data, it scanned all the way through on both but both scans still give "acess denied" and can't watch. I am using thre Perc Data which I've rarely had troiuble with.

Yaobing · « **Reply #34 on:** January 14, 2025, 09:04:22 am »

Perc Data is just an EPG provider and is not related to channel scanning.

Please provide a log, of scanning, and of playing a channel you have trouble playing.

boozemun · « **Reply #35 on:** January 14, 2025, 11:44:02 pm »

Yes I knbow what Perc Data is I just thougth I should give you that info. At this point I can't do anything because when I open MC a window constantly pops up saying An error was encountered message: Access Denid before I try to do anything... I hit OK and it keeps poppong up I can't get tro any other menu. Suggestions?

boozemun · « **Reply #36 on:** January 15, 2025, 12:33:47 am »

I uninstalled using the one provided by you and reinstalled replaced the DLL file and scanned. Channels are there but can't access any of them... ACCEASS DENIED
Log file attached

boozemun · « **Reply #37 on:** January 15, 2025, 12:42:36 am »

One of the many other many problems which I have mentioned more than once is even when it does work and if I have to rescan for any reason all the rules I've setup are useless because the channels are wrong or something. Picture attached, thanks.

JimH · « **Reply #38 on:** January 15, 2025, 01:43:22 am »

Have you tried re-installing the software that came with your tuner? You may have a driver problem.

Yaobing · « **Reply #39 on:** January 15, 2025, 08:55:07 am »

Access Denied is a strange error. Did you set up your recorder properly?

Thanks for the log file. I will look into it and hope I can get some information.

Regarding recording rules, yes if your rules reference specific channels, deleting channels and rescanning will cause you to lose your rules. To minimize the impact, you generally should not delete old channels when rescanning. MC will do its best to reuse the old channels while updating their parameters (except for a few rare cases when new entries might be created, instead of updating the old entries).

Yaobing · « **Reply #40 on:** January 15, 2025, 09:11:13 am »

The log file you posted does not contain any useful information. It contains only 15 lines of text.

Please refer to this thread for collecting log files or this wiki article on logging. You might have restarted MC (once or more than once). Each restarting will cause the log file to reset.

boozemun · « **Reply #41 on:** January 16, 2025, 10:22:50 pm »

The log file I sent had multiple files much longer than 15 lines but anyway maybe I made a mistake.

Here is a new one dated today.

Yaobing · « **Reply #42 on:** January 17, 2025, 01:58:35 pm »

Quote from: boozemun on January 16, 2025, 10:22:50 pm

The log file I sent had multiple files much longer than 15 lines but anyway maybe I made a mistake.

Here is a new one dated today.

Still no joy. Neither Log.txt nor "Previous Log.txt" contains any required events, i.e. Channel scanning or playing of a channel.

Can you describe exactly what steps you took, and what result you got?

Remember, you must collect the log files right after you perform the tasks, without restarting MC, without waiting for a long time.

boozemun · « **Reply #43 on:** January 17, 2025, 03:16:34 pm »

I assumed the log files wer created on a continuous basis likle most logs.

boozemun · « **Reply #44 on:** January 17, 2025, 03:21:56 pm »

I go to Logging / Reset Log then I enable loging report a problem then I scan channles and try to watch any of them. I then send you the log file from todays date on the desktop>

JimH · « **Reply #45 on:** January 17, 2025, 03:30:56 pm »

Do Report after you experience the problem.

boozemun · « **Reply #46 on:** January 17, 2025, 03:40:34 pm »

OK I was in the process of trying that. here you go.

boozemun · « **Reply #47 on:** January 17, 2025, 03:52:17 pm »

I see Acces Denied many times in the log but the rest is gibberish to me. Thanks.

Yaobing · « **Reply #48 on:** January 17, 2025, 04:57:49 pm »

Quote from: boozemun on January 17, 2025, 03:16:34 pm

I assumed the log files wer created on a continuous basis likle most logs.

That is why. If we did that the log file would take up your entire hard drive.

The log file resets each time MC is restarted (existing "Previous Log.txt" is discarded, current Log.txt becomes "Previous Log.txt" and a new Log.txt).

Yaobing · « **Reply #49 on:** January 17, 2025, 05:40:03 pm »

OK, got some info from the log file.

Your channel scanning was good.

Playback failed because MC could not run the DirectShow graph. Your graph involves JRiver Stream Switcher filter and SBE Sink filter for recording in WTV format.

So the failure possibly was related to SBE (Microsoft's Stream Buffer Engine). You can try running MC as Administrator and see if the situation improves.

Another approach is to change recording format to JTV or TS.

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Author Topic: TV tuner rescan stops at channel 13 (Read 1983 times)