Extracting Captions from ATI's VCR files?

[soulfx]

I've been trying to figure out a way to extract out the Line 21 CC Information from ATIs MMC VCR files (They don't do it the right way and just mux in the CC into the MPEG, they got their own "Time Shift Muxer and Spliter"). If I could extract out the Line21 info I could use CCParser to do the rest (I think). I've tried to create a raw binary file through Graphedit, but I can't get the pins to connect.

http://members.cox.net/soul.fxpro/graph.jpg

The closest I've been able to come is to separate the CC overlay and write it to AVI. Now only if SubRip Could read AVI...

I'm trying to do this so I can mux in the CCs as Subtitles in my Television OGMs. Anyone have any ideas (aside from sitting down manually writing them)? I'm looking for either somekind of AVI OCR SubRiper, or even better yet a working Graph that I can use to for direct Line 21 CC extraction.

[Fasola_Jan]

Hi :)

Lots of good info here:

http://forum.doom9.org/showthread.php?threadid=23454


Bye.
Fasola

[soulfx]

Wow! Thanks a bunch Fasola. I searched, but I guess I didn't search for the right words. Thanks for hookin me up. :)

I have been able to extract and create working SRT files from both saved VCR files and live CC Capturing. Sweet stuff. :D

I do however still have some problems. These have to do with ATI and their VCR format (actually it's more like a container). It turns out I can no longer capture with a pure interlaced stream (for later IVTC) and the audio becomes correpted. :rolleyes:

But then I remembered I have an older system sittin in the next room w/ another TV Tuner Card. I figure I'll just use the older system to capture the CC and my new system to capture the video & audio stream. I knew I was keeping it around for some reason. ;)

Peace,
SoulFX

[soulfx]

I thought I might give everyone an update. It turns out my other computer wouldn't have worked (the AIW Rage 128 Pro's can't capture CC's in their capture files), but that did make me look into an alternative, one that I don't know why I didn't see before.

I found out that while I'm capturing I can pull up a filter graph with just the CC Decoder and a Dump file, then just dump the CC info to a file.

So I just created a filtergraph and scheduled it through AT to whatever schedule I had setup in ATI's schedule.

Works great, and I don't have to mess with two computers.

Peace,
SoulFX