[mythtv] Supporting more Hardware capture cards

[Nigel Pearson]

> For the ATSC card, my problem was that I was using
> libmpeg2 decoding.  I heard in some places that this
> doesn't support displaying captioning


I only have one captioned source file handy,
but it does seem to work for me:

...
2007-11-23 11:08:24.732 AFD: Using libmpeg2 for video decoding
2007-11-23 11:08:24.732 AFD: Looking for decoder for MPEG2VIDEO
2007-11-23 11:08:24.732 AFD: Opened codec 0x191f000, id(MPEG2VIDEO)  
type(Video)
2007-11-23 11:08:24.732 AFD: Stream #1, has id 0x2316 codec id  
DVB_VBI, type Data, bitrate 0 at 0x0x15dc2f70
2007-11-23 11:08:24.733 AFD: Teletext caption #0 is in the English  
language on page 8 1.
2007-11-23 11:08:24.733 AFD: data codec (Data)
2007-11-23 11:08:24.733 AFD: Stream #2, has id 0x2315 codec id AC3,  
type Audio, bitrate 448000 at 0x0x15dc25d0
2007-11-23 11:08:24.733 AFD: Looking for decoder for AC3
2007-11-23 11:08:24.734 AFD: Opened codec 0x191f800, id(AC3) type(Audio)
2007-11-23 11:08:24.734 RingBuf(myth:// 
149.135.128.77:6543/1001_20060101110000_20060101113000.nuv):  
CalcReadAheadThresh(2413899711 KB)
                          -> threshhold(64 KB) min read(0 KB) blk size 
(32 KB)
2007-11-23 11:08:24.871 Dec: Trying to select track (w/lang)
2007-11-23 11:08:24.871 Dec: Selecting first track
2007-11-23 11:08:24.871 Dec: Selected track #1 in the Unknown language 
(0)
2007-11-23 11:08:24.871 Dec: Selected track #1 in the English language 
(6647399)

--
Nigel Pearson, nigel at ind.tansu.com.au| I've been talking to-
Telstra Net. Eng., Sydney, Australia | the ship's computer.
Office: 9202 3900    Fax:  9261 3912 | ...  It hates me!
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