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mpg and cutting problems (TMPGEnc,DVtool)

Discussion in 'MPEG-1 and MPEG-2 encoding (AVI to DVD)' started by thedee, Dec 11, 2004.

  1. thedee

    thedee Guest

    I have problems in cutting some of mpg videofiles with TMPGEnc (v.2.512). With most of the mpg files cutting goes normal way with TMPGEnc. Many of the mpg files in which TMPGEnc does not work (in cutting process) DVTool (v.0.53) does work (I followed these instructions with DVTool: http://www.afterdawn.com/guides/archive/mpeg_splitting.cfm and these with TMPGEnc http://nickyguides.digital-digest.com/cut-join-mpeg.htm)

    1. I have file “A.mpg” (size according to Windows is 804 mb; see info below according to Avicodec program). It is a non-standard SVCD file. When I use Nero Burning Rom (v.6.6) and choose non-standard/compliant SVCD the file “A.mpg” is too big to fit into one 700 mb CD-R (after the analyse which Nero does it informs that the size is 710 mb; this is what I call “normal (S)VCD reduction in file size” 804 > 710). So I cut little part out of the “A.mpg” file with TMPGEnc (size according to Windows is now 797 mb). But when I put this new version of “A.mpg” file (cutted version) to Nero it informs me after the analyse that the size is 800 mb (again non-standard/compliant SVCD is chosen it Nero).

    Why does this occur? The file should be now smaller than 710 mb (710 minus the cutted part) , but it is not. Why doesn’t the “normal (S)VCD reduction in file size” ( in lack of better description) happen with this new “A.mpg” (cutted version) file? The original and the cutted version both work ok in different players (Bsplayer, Windows Media Player). Am I doing something wrong, is the something wrong with the “A.mpg” file or is the problems with TMPGEnc (with cutting non-standard (S)VCD files with it)? With DVTool cutting process went ok (i.e. files were about 700 mb in Nero after analyse was ove so they did fit into one 700 mb CD-R) but why not with TMPGEnc?

    Ps. The same thing happens to files B and C (they are non-standard VCD files). They are little too big as such (706-710 mb after analyse) but after cutting a little part with TMPGEnc the “normal (S)VCD reduction in file size” does not happen in Nero (in Nero the size is about 790-800 mb).

    Avicodec (FILE A):
    File : 804 MB (790 MB), duration: 0:42:07, type: MPG, 1 audio stream(s), quality: 80 %
    Video : 722 MB, 2400 Kbps, 25.0 fps, 480*576 (16:9), MPG2 = MPEG 2 (SVCD/DVD), Supported
    Audio : 67 MB, 224 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported

    Avicodec (FILE B):
    File : 798 MB (787 MB), duration: 0:54:24, type: MPG, 1 audio stream(s), quality: 68 %
    Video : 700 MB, 1800 Kbps, 25.0 fps, 352*288 (4:3), MPG1 = MPEG 1 (VCD), Supported
    Audio : 87 MB, 224 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported

    Avicodec (FILE C):
    File : 798 MB (787 MB), duration: 1:16:15, type: MPG, 1 audio stream(s), quality: 56 %
    Video : 665 MB, 1220 Kbps, 25.0 fps, 352*288 (4:3), MPG1 = MPEG 1 (VCD), Supported
    Audio : 122 MB, 224 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported



    2. This problems occurs with file “D.mpg” in TMPGEnc (in cutting process). When I choose the the part that I am going to cut (from 0.00.00 to 1.15.00) the result is a file which is 1.07.27 in length. Why does this happen – the file should be 1.15.00 not 1.07.27 length. If I make another cutted version (from 1.07.31 to 1.22.18) the result is a 4 second long video file. If I use DVTool it makes two version. The first is from 0.00.00 to 1.15.00 and it is working fine. But the second part does not work in any player (in BSPlayer picture is black and no sound; same with Media Player but if I use the seek part I can see individual pictures but the video does not run at all; the same picture just stays in view). In TMPGEnc I did simple de-multipelxe (result video and sound separately in different files) and after that I did simple multiplex and the result was a file which was 1.07.27 long, not 1.22.18. What is wrong with this file – can it be fixed and do cutting process?

    Avicodec (FILE D):

    File : 763 MB (752 MB), duration: 1:22:18, type: MPG, 1 audio stream(s), quality: 41 %
    Video : 676 MB, 1150 Kbps, 25.0 fps, 352*272 (4:3), MPG1 = MPEG 1 (VCD), Supported
    Audio : 75 MB, 128 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported


    3. How can one cut, with DVTool, mpg video from the beginning? I mean if I want to cut off the first frames how does that happen? Because If choose in DVTool that start is 0 and end is for example 166663266 DVTools starts to make 50 parts. I just want 2 part: one very small (the beginning 0-16663266) and one big (the end part).
     
  2. aldaco12

    aldaco12 Active member

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    To keep thing simple, try encoding with TMPGenc doing Settings --> Advanced --> Select Range.
    If the movie is an AVI it will use a default 30 fps ===> 300 frames = 10 seconds.
    If tha movie is a .MPG it will use the right framerate (NTSC=23.976, PAL=25).
    To re-join the created videos (if you used that just to remove some frames in between a movie) you can use TMPGenc's File --> MPEG Tools --> Merge & Cut (type=MPEG-1 Video-CD).

    Please, when you encode use Settings--> Video --> Motion Search Precistion = Highest Quality (very slow) or you'll lose some video quality.
     

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