If DVD Recorders can write to DVD discs in real time then why can't computers?

Discussion in 'Amateur Video Production' started by Brian, Jan 21, 2004.

  1. Brian

    Brian Guest

    If DVD Recorders can write to blank DVD discs in real time when
    recording TV programs then why can't computers write directly to a
    blank DVD when receiving a video signal?
    Do DVD recorders have a super fast processor or is it due to a
    hardware Mpeg 2 convertor?

    Regards Brian
     
    Brian, Jan 21, 2004
    #1
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  2. Brian

    erratic Guest

    There are at least two programs that can capture straight to DVD.

    - Ulead DVD MovieFactory.
    http://www.ulead.com/dmf/new.htm
    "Disc-Direct Capture & Burn - There's no faster way to copy your movies
    to disc. Burn digital video or VHS movies straight from your camcorder,
    VCR, or TV to discs without storing the video onto your hard drive
    first."

    - InterVideo WinDVD Recorder.
    http://www.intervideo.com/jsp/WinDVDRecorder_Profile.jsp
    "WinDVD Recorder is not only a superb DVD player, it will record your
    favorite video straight to DVD or your hard drive."

    I haven't tried them so I have no idea how well they work.
     
    erratic, Jan 21, 2004
    #2
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  3. Brian

    Tim V. Guest

    Some have hard drives in them.
     
    Tim V., Jan 21, 2004
    #3
  4. or is it due to a
    Yep, hardware.

    Craig H.
     
    HighPeaksVideo, Jan 21, 2004
    #4
  5. Brian

    Dan Maas Guest

    If DVD Recorders can write to blank DVD discs in real time when
    More amazing in my mind is that they can *author* the disk structure
    in real time. I had thought DVD authoring was always going to require
    some kind of intermediate storage and processing. Real-time MPEG-2
    encoding has been around for years.

    For anyone with a real-time DVD recorder - what kind of menu, if any,
    do you get? Or is it just one MPEG stream that plays on disc
    insertion?

    Dan
     
    Dan Maas, Jan 22, 2004
    #5
  6. Brian

    david.mccall Guest

    I'm using last year's Panasonic DVD recorder. Mine has the built in
    hard drive, so I generally dump clips into the hard drive, trim the clips,
    name the clips, select the order I want them on the disc, burn the clips to
    the disc, select from a few not so great backgrounds, name the disk,
    and finally, finalize the disc. The disc is not useable in a desk-top
    player,
    until you finalize it.

    I think the process is about the same for recording direct to disc except
    that you burn and dump at the same time.

    David
     
    david.mccall, Jan 22, 2004
    #6
  7. Brian

    Brian Guest

    Out of interest do you get a choice on the type of disc you can write
    to such as DVD-R/RW DVD+R/RW?

    Do you get a choice of picture quality (such as a video bit rate)?

    How much (hours or minutes) of good quality video can you store on a
    single DVD disc?

    Regards Brian
     
    Brian, Jan 22, 2004
    #7
  8. Brian

    david.mccall Guest

    Mine only does DVD-R and DVD-RAM some do DVD+R and DVD+RW
    There may be other options on newer units. If you want a profesional unit
    try
    www.pioneerelectronics.com/pio/pe/images/portal/cit_3424/14805145PRV-LX1Flye
    r.pdf
    www.i4u.com/section-viewarticle-15.html
    I use the 2 hour mode all the time, and it looks fine for my needs. My unit
    has options for up to 6 hours. You do get a big quality hit at the 6 hour
    rate
    but it might be OK for low quality archiveing.

    David
     
    david.mccall, Jan 22, 2004
    #8
  9. The Panasonic only supports DVD-R and DVD-RAM, so there's no
    need to select the type of rewritable media. In fact, having the hard
    drive on it obviates the need for RW ability, since you end up using
    the drive for your temporary recordings. My model's 80 GB hard drive
    gives me 34 hours of recording time at 2 hr mode (720x480/5 Mbps).
    Yes. You can choose from XP mode (1 hr/disc. 720x480/9.4
    Mbps), SP (2 hr/disc), LP (4 hr/disc. 352x480/3 Mbps) , EP (6 hr/disc
    352x240/ 2 Mbps), and Flexbible Bitrate (In which you tell the
    recorder the exact running time of the program and it then chooses the
    best combination of resolution and bitrate in order to fit it.
    The SP or Flexible Bitrate mode will give you around 2 to 2
    1/2 hours of good quality video. The hardware MPEG encoder on the
    Panasonic gives excellent results, and SP mode gves the best
    compromise on quality and recording time. XP mode is fantastic,
    though, and really gives a recording that's hard to tell from the
    original broadcast.

    As for recording time on the 80 GB hard drive, you get 17
    hours of XP video, 34 hours of SP, 72 hours of LP, and 107 hours of
    EP. It's really a revelation having the drive, since you can capture
    at XP, edit out commercials, and even do some surprising edits. For
    example, I had some ancient copies of an old anime series from the
    1960's. The opening credits were wrecked on most of the copies, but
    were intact on one episode. I set up a play list where the intact
    credits ould play before each episode with wrecked credits. The edit
    was smooth and worked very well. The unit also has built in time base
    correction and noise reductions, so you can really stabilize old
    tapes. When you're ready to burn to a final disc, you can reencode to
    SP mode for a longer play time.
     
    Neil Nadelman, Jan 24, 2004
    #9
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