"Real WMV" 2-hour movie, 148.50 Mhz, 1920 x 1080 progerssive scan image, 1-bit file size

Discussion in 'Amateur Video Production' started by Radium, Oct 23, 2006.

  1. Radium

    Radium Guest


    Here is my hypothetical scenario:

    A two-hour movie is made using the finest video recording equipment
    availabe today. The movie is recorded in digital uncompressed RGB
    format, with a sample rate of 148.50 MHz, 1920 X 1080 progressive scan
    image resolution, and a color-depth of 32-bit. After this movie is
    recorded, its format is changed from uncompressed digital RGB to "Real

    "Real WMV" is described in the following threads:



    The WMV now has a sample rate, color-depth, and image-resolution
    exactly the same as what the RGB had. After this, the color-depth of
    the WMV file is compressed SOOOO much that the file-size is only 1-bit!
    However, the image-resolution [in pixel X pixel], sample rate, and the
    length of the movie -- 2 hours -- remain the same.

    After this, the WMV video is then converted back to uncompressed RGB
    [I'll call this the "2nd RGB"]. The 2nd RGB has the same sample-rate,
    image format ["resolution"], and color-depth as the 1st RGB. However,
    the WMV truncation of the color-depth would obviously show up in the
    2nd RGB because the 2nd RGB previously was WMV.

    My question is, how would this 2nd RGB video look like after the above

    How would this video look like? I imagine that the pictures and their
    motions would be very clear [in terms of image-clarity] with no
    skipping. The only artifacts would be those affecting the colors. These
    artifacts would be very extreme because when the 2nd RGB was in its
    compressed WMV format, it was of such infinitisemly small color
    resolution. Do I guess right?



    P.S. Why not use this WMV for video-conferencing or for online video
    viewing? There are many who watch their movies by downloading them from
    a website.
    Radium, Oct 23, 2006
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  2. Radium

    Lionel Guest

    Bzzzt! Error!
    No, not possible.
    Lionel, Oct 23, 2006
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  3. Radium

    Radium Guest

    Why not? A 44.1 Khz WMA file can have a bit-rate as low as 20 kbps. In
    uncompressed digital formats, you need at least a bit per sample. Not
    necessarily so in compressed formats. That is how a WMA file can have a
    bit-rate lower than its sample rate.
    Radium, Oct 23, 2006
  4. Radium

    Tom P. Guest

    Why not? Because when you use compression you have to compress
    something. You can't use compression and have everything be the same.

    Oh, and as for the initial question, it's impossible. You cannot
    compress any amount of data smaller than 4 bytes. Look up the wmv
    spec. Even if the picture was a blank screen it would take more than 4

    Or are you asking if you compress all the information out of a signal
    will that affect the signal? Um, yes. That's what you are doing.

    Tom P.
    Tom P., Oct 23, 2006
  5. So you mean the files I compress with WinRAR are not the same anymore?



    oh, forgot a big wink up there :))
    Martin Heffels, Oct 23, 2006
  6. Radium

    Lionel Guest

    Information theory proves it impossible.
    Yeah, whatever. Put up a 2 hour, single bit movie on a website
    somewhere if you want anyone to take you seriously.
    Lionel, Oct 24, 2006
  7. Radium

    stratus46 Guest

    Be nice. 'Radium' is in the end phase of decaying into 'lead'........

    stratus46, Oct 24, 2006
  8. Radium

    Phil Carmody Guest

    1's easy, Matt can do that with a custom-build of BARFEST, I'm sure.

    Put up _3_ such movies, then I'll be impressed!

    Phil Carmody, Oct 24, 2006
  9. Radium

    Lionel Guest

    So will I - seeing as even the most generous interpretation of the
    maths allows only 2 different decompressed output datasets from a
    compressed file containing a single bit. (Assuming of course that
    you're using the same decompressor each time. ;)
    Mind you, the decompression program's probably going to be pretty big.
    Lionel, Oct 24, 2006
  10. Radium

    markn Guest

    Yeah, whatever. Put up a 2 hour, single bit movie on a website
    I was going to start a business selling single bit movies - it seems
    like a natural, the download times are pretty short.

    But for some reason, after working on it a long time, I was only able
    to put two movies into my inventory. My investors said that I wasn't
    going to be able to capture first mover advantage in the
    single-bit-movie business with just two movies, so we backed off and
    shut the plan down.

    However, I haven't given up yet, I think I may be able to do better
    with two-bit movies. I'm working on the compression algorithm right
    now, and we'll see if I can get a larger inventory.

    | Mark Nelson - http://marknelson.us
    markn, Oct 24, 2006

  11. Hollywood has been in the two bit movie business for over 50 years.

    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
    Michael A. Terrell, Oct 24, 2006
  12. Really? They can bring out zer0-bit movies, because the current crop of
    movies isn't a bit interesting at all.


    Martin Heffels, Oct 24, 2006

  13. As long as they don't destroy those '50s and '60s Sci Fi films. They
    are so bad that I could watch them all day long. :)

    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
    Michael A. Terrell, Oct 24, 2006
  14. Excellent point...
    Gene E. Bloch, Oct 24, 2006
  15. Well, that 1969 sci-fi movie about a landing on the moon is missing...

    Martin Heffels, Oct 24, 2006
  16. Radium

    Phil Carmody Guest

    Oi! It was /I/ who made the excellent point, it's just that
    no-one bloody understood it! Slap-wristies if you needed the

    Phil Carmody, Oct 24, 2006
  17. True about one bit ==> two movies; I was remarking on the *size of the
    decompressor*, something I should have realized without having to be
    coached... [1]

    This (and newsgroups in general, of course) is a community effort, and
    sometimes it's hard to give credit properly...

    Sorry: I'll try to do better in the future,

    [1] I've often remarked on the high degree in redundancy in music. For
    instance, on my hearing the first chord, the whole Eroica symphony pops
    into my mind (well, tries to, at least). This is an excellent example
    of the size needed for the decompressor program.
    Gene E. Bloch, Oct 24, 2006
  18. Radium

    Lionel Guest

    I made my comment mostly to let you know that I'd gotten your joke.
    (And to take the piss out of our loonie Mr "who the hell is Shannon?"
    Lionel, Oct 25, 2006
  19. Radium

    Radium Guest

    I need software for that. Where can I find such software?
    Radium, Oct 25, 2006
  20. Radium

    Radium Guest

    Does the 4-byte limit also apply to WMA audio?
    Radium, Oct 25, 2006
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