Why ULead Still Need to Render a Video That is Already in MPEG-2?

Discussion in 'Amateur Video Production' started by Jay Chan, Jul 11, 2004.

  1. Jay Chan

    Jay Chan Guest

    I am using ULead Video Studio 7.0 SE to edit out unwanted video frames
    from one MPEG-2 file. When I am done with editing and try to create
    the final video file in the same attributes as the original MPEG-2
    file, I am surprised that ULead still needs to render the video.
    Should ULead simply stitches the video clips together without further
    rendering? Do I understand this incorrectly?

    You know rendering takes a long time, and I am trying to get away from
    doing this.

    When I captured the video initially, I used the hardware encoder in
    PVR-250 TV-tuner card to capture the video into MPEG-2, and that was
    fast. But I don't know how to take advantage of the hardware encoder
    in PVR-250 after the video has already in the PC. Therefore, I will
    have to rely on ULead to create a MPEG-2 file for the edited video.


    Jay Chan
    Jay Chan, Jul 11, 2004
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  2. Jay Chan

    Stephen Guest

    Your settings in MSP for mpeg2 don't match what the mpeg2 file has, so
    MSP will re-encode or you have smart render turned off.


    Stephen, Jul 12, 2004
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  3. Womble MPEG VCR that came with the card is much better for this task. I
    never found a way to get Ulead to edit Mpegs and not wreck them comping
    out the other end.
    Chris Phillipo, Jul 12, 2004
  4. Jay Chan

    Jay Chan Guest

    Thanks for responding.
    What's MSP?

    Here, I assume that MSP means a project in Ulead Video Studio. I have
    checked the properties of the MPEG-2 file and match the project
    properties to the MPEG-2 file. But Ulead still render the output video

    One thing strange is that:
    I use "Fair" setting in Beyond-TV to capture the video and encode
    it into MPEG-2 file. The "Fair" setting is supposed to be something
    like 3??x240. But Ulead says that the MPEG-2 file is 352x480. Anyway,
    I try both resolutions; neither make any difference; Ulead still
    insists on rendering anyway.
    I have tried turning this off and on. But neither make any difference.

    Does this have something to do with the fact that I am using an SE
    version that is bundled with a Firewire card instead of a retail boxed

    Jay Chan
    Jay Chan, Jul 12, 2004
  5. Jay Chan

    Bariloche Guest

    Probably there's no way to attain that, because the chip may not
    accept the raw digital video input you would supply it.

    As for the editing, use mpeg-vcr as Chris Phillipo sugests.
    Bariloche, Jul 13, 2004
  6. Jay Chan

    Jay Chan Guest

    When I captured the video initially, I used the hardware encoder in
    OK, seem like I will have to use the PVR-250 encoder card straightly
    as a TV tuner card.
    I will look around to see what mpeg-vcr is.


    Jay Chan
    Jay Chan, Jul 14, 2004
  7. It comes with the card or you can download it off the Hauppage web site.
    Chris Phillipo, Jul 14, 2004
  8. Jay Chan

    Jay Chan Guest

    I am quite sure that the problem is with Ulead.

    I use a Cut-Only video editor from Hauppauge that is specifically
    designed for their PVR-250 card. That editor has no problem merging a
    short video clip that I made from Ulead with a long video file; it
    does this without re-encoding the MPEG video. This means the project
    setting in Ulead for the MPEG file match exactly with the MPEG file.
    This means this is not an issue with wrong video project setting.

    I have a feeling that the Smart Render feature in Ulead may have been
    disabled in this "free" version that is bundled with my FireWire/USB-2
    card. The full retail version may have this feature enabled.

    Jay Chan
    Jay Chan, Aug 2, 2004
  9. Jay Chan

    John Doe Guest

    Aren't there different flavors of MPEG 2 with only one of them meeting the
    DVD forums standards? This is the problem, depending on codec an AVI file
    isn't always a standards compliant file and MPEG 2 isn't always and
    standards compliant MPEG 2. They may play on the computer fine, but when
    going to DVD or VCD these different flavors have to be dealt with or your
    DVD player won't handle them, they only have one or two standard formats
    installed in them.

    John Doe, Aug 3, 2004
  10. Jay Chan

    Jay Chan Guest

    Aren't there different flavors of MPEG 2 with only one of them meeting the
    If I understand yours correctly, you are saying that the Cut-Only
    video editor may be able to generate a MPEG file; but that file may
    not be DVD-compatible. I assume what you meant is that Ulead detects
    this situation, and tries to convert the MPEG into DVD-compatible, and
    that may explain the reason why Ulead always tries to re-encode my
    MPEG-2 videos.

    I can understand what you said. But I doubt that is the case because
    the video clip is recorded by Beyond-TV using a DVD-compatible format:
    NTSC DVD Ready Hi-Res
    4125K constant bitrate

    May be I should do a test by doing this:
    - Use Beyond-TV to generate a very short MPEG-2 file using a
    DVD-compatible format.
    - Do some minor editing on the video clip using Ulead.
    - Use Ulead to generate a MPEG-2 file (called it second MPEG-2 file)
    based on the edited video. Check if Ulead needs to re-render the
    MPEG-2 or not.
    - Do some more editing on the second MPEG-2 file and generate another
    MPEG-2 file (make sure Smart Render is enabled) and see if Ulead will
    render the video again.

    If Ulead re-renders the video in both times, this means Smart Render
    in this version of Ulead may have been disabled.

    If Ulead re-renders the video in the first time, but it doesn't
    re-render the video in the second time, this means Ulead doesn't
    re-encode a MPEG file that Ulead generates; but somehow it needs to do
    so for MPEG-2 file that other program generates. This means that
    Beyond-TV generates a MPEG-2 file that Ulead thinks it is not DVD
    compatible. In this case, I will have to look for another video
    editing software.

    I will see how the test goes.

    Jay Chan
    Jay Chan, Aug 3, 2004
  11. Jay Chan

    Bariloche Guest

    Desktop DVD recorders generate a special kind of .VOBs, which do not
    turn easily in regular .mpg I assume hardware mpeg encoding PC cards
    do the same. I managed to devise a way to get a regular .mpg from the
    irregular VOBs, but it's a lot of trouble. There's a program,
    PVAStrumento (http://www.offeryn.de/dv.htm), which I still need to
    try, but looks like might be a solution for the issue of different
    mpeg formats. Or perhaps the WinTV editor at

    I guess any other program would fail as much as Ulead

    It may be able to handle the card's specific non-standard mpeg files.
    Let me guess: use the remultiplex function of the WinTV Editor (I have
    never used it, but from what I've read on Hauppauge's site), to make
    the recorded mpegs into regular ones, then feed _that_ into Ulead's.
    Bariloche, Aug 3, 2004
  12. Jay Chan

    Jay Chan Guest

    May be I should do a test by doing this:
    I tested that, and I found that Ulead re-rendered the video the first
    time based on the MPEG file coming from Beyond-TV, and it didn't
    re-render the video the second time when I asked it to generate a MPEG
    file based on a MPEG file that Ulead generated. This means Ulead
    doesn't like the MPEG file that Beyond-TV has generated for some

    Jay Chan
    Jay Chan, Aug 4, 2004
  13. Jay Chan

    Jay Chan Guest

    Desktop DVD recorders generate a special kind of .VOBs, which do not
    That may or may not be the case. I don't know; but I guess I am
    running out of idea, and I am open to any suggestion.
    Please post the result. I am interested to know.
    The WinTV editor that you mentioned is the same as the Cut-Only Video
    Editor that I mentioned in my previous post. I don't see how it can
    I have tried the remultiplex function in the Cut-Only Video Editor
    (WinTV Editor) to process a SVCD MPEG. But that doesn't made any
    difference. Ulead re-render the video regardless if I ask it to
    generate MPEG based on the original SVCD that I capture using
    Beyond-TV or if I ask it to generate based on the SVCD remultiplexed.

    Jay Chan
    Jay Chan, Aug 4, 2004
  14. Jay Chan

    Gordon Abbot Guest

    You probably did this, but you have to set the parameters of the output
    file to be exactly the same as the input. The slightest deviation and
    you will re-render every time.

    Gordon Abbot, Aug 4, 2004
  15. Jay Chan

    Jay Chan Guest

    You probably did this, but you have to set the parameters of the output
    Yes, I have done that. Actually, that was the first thing I checked
    when I started having the "Ulead re-render MPEG video", and that was
    the reason why I posted the message in the first place.

    I may try Ulead Movie Factory that another newsgroup member has no
    problem using it to edit MPEG files from Beyond-TV.

    Jay Chan
    Jay Chan, Aug 5, 2004
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