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VCD formats

Discussion in 'MPEG-1 and MPEG-2 encoding (AVI to DVD)' started by element72, Dec 20, 2004.

  1. element72

    element72 Member

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    First I'd like to point out that my questions are based on the 2 images in this site http://www.freewebs.com/vcdpic/.

    I've found 2 different VCD formats which are .DAT and mpeg 1. First I used the vcd burning option in Nero and I burned the "shrek 2.Dat" on a 700mb cd-rw (this was a successful burn).

    Then I converted the .DAT into mpeg 1 (another VCD format) and used Nero to burn a vcd on another 700mb cd-rw. Unfortunately Nero detected that the media was larger than 700mb but I though Nero would encode it to .DAT or something....

    Is there a way to actually convert a media file into .DAT (to me.. it seems that .Dat is the smallest VCD format u can get)
     
  2. aldaco12

    aldaco12 Active member

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    No, .DAT is a [bold]mpeg with header[/bold], a 'riff file', and exactly it is 101.24% bigger than the original MPG. Therefore .DAT is NOT a 'small' movie: the original mpegs were surely small and a little smaller than the DATs you have (check it by re-converting them to mpegs with VCDGear). You can re-convert a DA inyo mpeg by choosing [bold]dat --> mpeg [/bold] in VCDGear. You turn the MPG into a DAT automatically, when you make a VCD image with VCDGear, MPG -> DAT ('mount' that image and extract it, to check what happens).

    To make a VCD with a 700 MB mpeg DO NOT USE NERO (even it would encode the movie only if you chososed VCD in the wizard, it is not safe because it simultaneously converts + burn)! Read http://forums.afterdawn.com/thread_view.cfm/110106 .

    And all mpegs can be either MPEG-1 (VCD) or MPEG-2 (SVCD, DVD but changed into files with VOB extension).
     
  3. daemonzx6

    daemonzx6 Regular member

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    In more understandable terms, the DAT is like a VOB. It contains the MPEG1 stream, but is in the format that can be read by players, with the added information for I'm guessing button functions. A VCD can't have an MPEG1 file on it, it wraps the MPEG1 in a DAT which is what is actually burned to the CD.
     
  4. element72

    element72 Member

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    is there a way how I can convert a 705mb(avi) to a mpeg that's below 700mb?
     
  5. daemonzx6

    daemonzx6 Regular member

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    yes, select "mpeg output" in TMPGEnc and lower the audio and video bitrates. to find out what to lower them to, get a bitrate calculator. I recommend the one included in DV Tool.
     
  6. element72

    element72 Member

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    I don't know how to adjust the bitrate cause the settings are highlighted in grey. Is TMPGEnc free along wit DV Tool. Where is DV Tool?
     
  7. daemonzx6

    daemonzx6 Regular member

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    if you are using the wizard, then after you select the media you will convert it to, down in the lower right corner is a button that should read "MPEG Output." click it, and then you should be able to change the bitrate settings. DV Tool is a freeware tool that I beleive is available here on afterdawn.
     

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