Scene Detection DVDs

Discussion in 'Digital Video' started by jrarick, Feb 11, 2010.

  1. jrarick macrumors newbie

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    Feb 11, 2010
    #1
    I have a box of DVDs that are of football games. Each game has about 150 plays. I am looking for some way to rip the DVD into 150 separate files (.mov, .avi, .mp4) using some type of automatic SCENE DETECTION. . These are homemade DVDs - no copy protection of any kind.

    Any ideas? And yes, Handbrake is great - we use it now, but then we must use a separate piece of software to manually mark the beginning and ending of each play. That takes up A LOT of time.

    Thanks in advance!

    Jack
     
  2. DoFoT9 macrumors P6

    DoFoT9

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    #2
    are the scenes automatically on the home made DVDs? (when you put them in a DVD player can you press the Next button and jump to the next scene?)

    if so, handbrake will do it for you.

    if not - then you will have to do it all manually!
     
  3. spinnerlys Guest

    spinnerlys

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    #3
    Scene detection works via analyzing the image and finding straight cuts, which often appear as a drastically changing of picture information, like colour or luminance values.

    Are those plays interrupted by cuts? If so, scene detection will not really work, as scene detection does not analyze the drama or story, just image values.

    That's how I describe it anyway.
     
  4. DoFoT9 macrumors P6

    DoFoT9

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    #4
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    interesting. what software is able to do that on macs?
     
  5. spinnerlys Guest

    spinnerlys

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    #5
    I don't know, I just used that explanation of how it works (in my mind). Maybe that was not a good thing to do, but that explanation seems to be logical in my little technical mind.

    I know that scene detection on tapes works via timecode or another bit of information, that tells the computer (or recording/capturing device), that at this point a new take was taken. It works with DV and HDV and other and more professional tapes.

    I will look it up now, how scene detection really works.

    Scene detection might not even be the right word, a better term would be take detection, as a take is the single recording of one element of a scene. Most of the time, a scene is composed of more than one take.
     
  6. DoFoT9 macrumors P6

    DoFoT9

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    your logic seems perfectly fine to me. I have imported DV tapes before and it automatically detects the 'take' for me. I don't doubt that it isn't possible, I just doubt that there is any software out there to do it. I have never come across any. Worth a try though!

    it appears that Adobe Premier can do it, though id say thats just for importing movies from camera.

    Scene Detector apparently works, but costs :( and it doesnt look like it will do the tasks we are after.
     
  7. jrarick thread starter macrumors newbie

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    Feb 11, 2010
    #7
    Optical Scene Detection ..

    Sorry!

    What I should have asked for was any kind of software that could do OPTICAL scene detection on DVD's - and then convert them from MPEG2 (VOB files) to some kind of avi, qt MOV, or qt H264. (Firewire - miniDV tape uses timecode. DVDs - MPEG2 does not have timecode - hence the problem). Aughh!

    I have found some software that is SUPPOSED to be able to do this on a Windows PC, but nothing on the Mac yet. And I say SUPPOSED to, because I haven't got any of the PC software to work yet as well.

    Thanks for your thoughts!
     
  8. balamw Moderator

    balamw

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    #8
    I did something like this some years ago when I transferred over some old PAL VHS tapes of Super 8 movies and then used some software on Windows to optically detect the scenes. As I recall it worked fairly well.

    I think the software may have been http://scenalyzer.com/

    EDIT: Form the description it definitely optically detects scenes, but may only do so from a firewire/DV source, so now I'm unsure of the process I went through.

    B
     
  9. jrarick thread starter macrumors newbie

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    #9
    Scenalyzer with DV tape ..

    Scenalyzer is a great alternative to iMovie on a PC - but it DOES NOT import video from DVDs.

    Thanks for the suggestion though - I am ALL ears!

    Jack Rarick
    Coach's Video Assistant
    www.coachsvideoassistant.com
     
  10. balamw Moderator

    balamw

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    #10
    I think I did the unthinkable when I went through this last time. Since they were originally grainy Super8 movies, I had them dumped from PAL VHS to NTSC DVD and took that back in as DV using S-Video and my miniDV camera as a bridge so I could use scenalyzer.

    B
     

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