Posted by D on 07/16/07 19:58

On Jul 16, 10:27 pm, "Neil Smith [MVP Digital Media]"
<n...@nospam.com> wrote:
> On Sun, 15 Jul 2007 15:13:58 -0700, D <t...@bk.ru> wrote:
> >On Jul 15, 4:15 pm, "Neil Smith [MVP Digital Media]" <n...@nospam.com>
> >wrote:
> >> On Sat, 14 Jul 2007 14:04:25 -0700, D <t...@bk.ru> wrote:
> >> >> >>> > I downloaded "Magic of Flight.mpg". MS Windows XP SP2 Media Player
> >> >> >>> > writes that it does not have a codec to playback the file. GSpot does
> >> >> >>> > not show the codec too.
> >> >> MPG file extensions may contain either of MPEG1 or MPEG2 video
> >> >I made a DVD-Video from the file using the Nero 7 Vision 4, but the
> >> >DVD-video drops a frame every 2 seconds. How to prevent the frame
> >> >drop?
>
> >> What are you using to determine frame loss ? Is this visual
> >> estimation, or using some tool which counts how many frames per
> >> second? It could just be you're having playback problems - try the
> >> disk in a standalone DVD player instead of on the PC to see what
> >> effect is apparent there.
>
> >> >The Nero 7 Vision 4 suggested to use PAL for the DVD-Video at first
> >> >because I made the DVD-Video for Europe, but then suggested to use
> >> >NTSC because the Vision 4 reckoned that the source video was NTSC. I
>
> >> I'm not fully clear what you've done here from your explanation. If
> >> you created NTSC source content then moved to PAL, you have gone from
> >> 30fps to 25fps, which means every 6th frame (I think) should have been
> >> dropped.
>
> >> >was not sure if Europe TVsets and dvd players could play NTSC
> >> >correctly and kept PAL.
>
> >> I can't speak for everybody, but my toshiba DVD player can play NTSC
> >> OK, however the SCART output signal isn't compatible with my old
> >> ex-rental TV, so I get B&W video with striping / herringbone pattern
> >> instead. The picture is visible, but just not useable on that setup.
>
> >> >WinDVD 7 plays the initial file without the pink stripe.
> >> >The latest video card driver is installed.
>
> >> Which pink stripe do you mean?
> >> You haven't mentioned that before...
> >VLC player plays the initial file with a vertical pink stripe on a
> >right part of the video.
>
> Oh, dunno, sorry !
>
> >The frame loss is a visual estimation in every software player. NTSC
> >version of the same DVD does not drop frames.
>
> Did you try this disk in a hardware DVD player conected to your TV
> yet? That would be the real test. It's impossible to tell if there's
> any frame loss just by looking at the source, especially if you're
> used to NTSC at ~30fps.
>
> >frames. The Vision 4 should not drop frames during the convertion. Did
> >Vision drop frames because I changed the default "Automatic" (the same
> >as original, probably, interlaced) vertical scan to "Progressive"?
>
> You did ? Why did you do that, you never mentioned it before...
>
> >Why does the resulted DVDs have the block compression artifacts even
> >if I selected best quality settings ("High quality" and 2-pass
> >conversion) in the Vision?
>
> There are compression artefacts (macroblocking) ? You never mentioned
> that before, either.
>
> If it was me, I'd start again and try to vary only one parameter at
> the time, starting from the default settings of the encoding software
>
> I have this feeling you've changed every possible checkbox on screen
> from the defaults - which is not really a useful way to troubleshoot
> or isolate a problem.
>
> Cheers - Neil
> ------------------------------------------------
> Digital Media MVP : 2004-2007http://mvp.support.microsoft.com/mvpfaqs- Hide quoted text -
>
> - Show quoted text -
Thanks Neil for your reply!
I changed the default "Automatic" (the same as original, probably,
interlaced) vertical scan to "Progressive", because I thought that the
Progressive scan video would look better on 100Hz progressive scan TV
and progressive scan DVD player than an Interlaced video.
Yes, there are compression artefacts (macroblocking).
The frames drop is sharp and in clear second intervals, it is not just
the slower 25 fps frame rate.
Best regards,
Dima

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