Changing Closed Caption Line 21 Decoder

[petercooperjr]

I'm running GB-PVR 1.4.7 with an HVR-1600 tuner card in the U.S. I'm trying to get closed captions working with the MPEG decoder I want to use.

If I have the "Show closed captions" checkbox checked in the Misc tab in Config, then with the "ATI MPEG Video Decoder", closed captions work for digital recordings, but not for analog recordings. (Also, the ATI MPEG Video Decoder tends to crash on me occasionally.)

With "Show closed captions" on with the "Cyberlink Video/SP Decoder (PDVD9)" decoder, closed captions work for analog recordings, but not for digital recordings. Most of what I watch is HD digital recordings, and the Cyberlink decoder seems to work best on my system, so I'd really like to figure out how to get it to work with closed captions.

While diagnosing this, I connected to GB-PVR with GraphEdit with captions on and the Cyberlink decoder on a HD digital recording, and then saved that graph and reopened it in GraphEdit outside of GB-PVR. If I then replace the standard "Line 21 Decoder 2" with the "CyberLink Line21 Decoder (PDVD9)" filter, and then play it in GraphEdit, I see the file playing with the captions working. So, it seems like the CyberLink decoder just requires use of its own closed caption decoder rather than just using the standard one.

So, now I just have to figure out how to get GB-PVR to use this graph when playing a file. How does it select which filter to add to the graph to do the Line 21 decoding? Is there a config file setting somewhere? I tried changing the Merit of the CyberLink Line21 Decoder filter to be higher than the Merit of the basic Line21 Decoder, but that didn't seem to do it. I've not yet tried lowering the merit of the basic Line21 Decoder, as I was a bit nervous to start mucking around the internals of DirectShow too much.

I don't know if it's relevant, but the PDVD9 filters I'm referring to are from a trial copy of PowerDVD 9. I'd be happy to buy the $15 decoder package from them if I knew that it'd all work, but I want to make sure that it all works in GB-PVR before buying anything.

I'd appreciate any suggestions anyone might have. Thank you very much.

[whurlston]

Check the filter merit values for the two line 21 decoders. You may just need to adjust them.

[petercooperjr]

Here are the Merit valuesof what look to me to be Line 21 decoders installed:
"Line 21 Decoder": 00600000
"Line 21 Decoder 2": 00600002
"Cyberlink Line21 Decoder Filter": 00200000
"Cyberlink Line21 Decoder (PDVD9)": 00800000

Note that the "Cyberlink Line21 Decoder (PDVD9)" one was originally lower (I think 00200000, but I guess I should have written it down) and I changed it to 00800000 in an attempt to get GB-PVR to pick it up.

However, it still is using the "Line 21 Decoder 2" with these Merit values.

Thank you.

[sub]

Unfortunately its hardcoded to use the 'Line 21 decoder2' filter. I'll try to make it configurable in the next release.

[petercooperjr]

Thank you very much, sub.

Is there some way to use a plugin or something to manipulate the graph that GB-PVR makes after it makes it but before it plays it back? It looks like there's something for people who need to make an arbitrary graph for recording; is there something similar for playback?

[sub]

Sorry, no there isnt.