Radius Telecast, Mac and General Vid Cap Questions

Discussion in 'Amateur Video Production' started by Tom, Nov 29, 2004.

  1. Tom

    Tom Guest

    I've got a couple of questions on my Radius VideoVision SP Telecast
    (PCI version) setup. If anyone is still using one of these, or
    remembers one from a few years back some info would be much
    appreciated. I've read alot on the system but haven't used it much
    yet.

    1. Should I want to capture uncompressed video can I use the Telecast
    and turn compression off in software?

    2. I'm planning on getting a pro S-VHS VTR, just waiting for one at a
    decent price. Occasionally I see them with component out. The
    Telecast supports component capture, but will I see any benefit over
    S-Video with S-VHS? Betacam decks are no where near my budget. I
    don't plan on outputting back to tape and the highest quality source
    I'd be recording would be the occasional commerical SVHS tape.

    3. In addition to the Telecast I've got a Targa 2000 Pro. I don't
    want to rehash comparisions of video quality between the Telecast and
    Targa - I've read the old usenet postings. The Telecast does offer
    digital audio input (AES/EBU, S/PDIF) but given what I'll be
    recording, SVHS or NTSC broadcast, is this even an advantage for me?

    4. I've got a chance to get a base model Aurora Igniter for a low
    price - under $100. Would this more modern card be a significant
    improvement?

    thanks for the advice,

    Tom
     
    Tom, Nov 29, 2004
    #1
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  2. : 3. In addition to the Telecast I've got a Targa 2000 Pro. I don't
    : want to rehash comparisions of video quality between the Telecast and
    : Targa - I've read the old usenet postings. The Telecast does offer
    : digital audio input (AES/EBU, S/PDIF) but given what I'll be
    : recording, SVHS or NTSC broadcast, is this even an advantage for me?

    Are you going to be capturing from analog S-VHS tapes? If so, as far as *I*
    know the audio there is analog. And if this is the case, I don't think you
    will benefit using S/PDIF. If your source is analog video, but digital audio,
    then by all means - yes.

    --Leonid
     
    Leonid Makarovsky, Nov 29, 2004
    #2
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  3. Tom

    Tom Guest

    Are you going to be capturing from analog S-VHS tapes? If so, as far as *I*
    That's what I assumed, just wanted to make sure I wasn't missing
    anything.

    I'm really debating on whether or not to get this Aurora Igniter.

    It seems like the absolute best way to go from analog to digital
    (finalize as MPEG2) is to capture uncompressed analog, edit if needed,
    then compress via software on a dedicated fast PC.

    Since I'm not planning to output back to tape (if I do DVD rips as
    well, might as well keep all output on DVD) is there any benefit in
    using MJPEG compression at all??? Should I just be doing uncompressed
    capture and encoding MPEG2 from there?

    I know recompressing already compressed video using lossey codecs is
    bad. But the single frames shown for the igniter even at low data
    rates look pretty good!
    www.auroravideosys.com/support/quicktime/comparisons.html Would I
    just be asking for trouble (in the form of crappy results) by
    recompressing MJPEG files as MPEG2?

    Of course I want to use the Telecast simply because I think it looks
    cool - what a reason ;)

    Tom
     
    Tom, Nov 29, 2004
    #3
  4. : That's what I assumed, just wanted to make sure I wasn't missing
    : anything.

    I think the only time you need to use S/PDIF in for video capturing is when
    you capture from LaserDiscs. Or from DVDs, but with DVDs, you don't want to
    capture them. You want to rip them.

    : Since I'm not planning to output back to tape (if I do DVD rips as
    : well, might as well keep all output on DVD) is there any benefit in
    : using MJPEG compression at all??? Should I just be doing uncompressed
    : capture and encoding MPEG2 from there?

    If your final result is DVD, then you don't need MJPEG compression. If you can
    capture uncompressed, go for it. Another option is Huffyuv lossless codec.


    --Leonid
     
    Leonid Makarovsky, Nov 29, 2004
    #4
  5. Tom

    Tom Guest

    I think the only time you need to use S/PDIF in for video capturing is when
    Understood. Is there any reason to ever capture from a DVD rather than
    ripping? Normally of course not, but wondering if there would ever be
    a reason to capture from DVD rather than rip. Avoiding some new copy
    protection is the only thing I can think of. And of course capture
    doesn't give you dvd menus.
    I'll have to check if I can capture uncompressed with the Telecast.
    That's one other reason I'm considering getting this Igniter, it will
    do both MJPEG compressed and uncompressed.

    Is there any reason to use MJPEG anymore??? I've read that MPEG2
    should almost always result in smaller file sizes than MJPEG of equal
    quality. I know MPEG2 can't be edited as cleanly as DV or MJPEG so I
    can see the advantage of those codecs for editing. But since
    uncompressed really isn't a big deal anymore is there still a reason
    for compressed capture?

    I've considered getting a real-time MPEG2 capture card but hear that's
    not the best way to go.
     
    Tom, Nov 30, 2004
    #5
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