stripes??

plasmascreen · 24th April 2004, 13:54

Hi all,

Can anyone give me some help ?

I want to re-author my wedding-dvd... So

I have a DVD with the video in VOB format:

AUDIO_TS
VIDEO_TS

video_ts.bup
video_ts.ifo
video_ts.vob
vts_01_0.bup
vts_01_0.ifo
vts_01_0.vob
vts_01_1.vob
vts_01_2.vob
vts_01_3.vob

The video format is MPEG-2 720x576 PAL 625/50 4:3 25 fps format with mpeg-1 2ch 48kbps 20bps audio according to IFOEDIT

I would like to reauthor this video and create a DVD with menu and my movie in 16:9 format so i can see it widescreen on my plasmascreen..

I already tried this: demux video stream from the main VTS_01_0.VOB file with resulting m2v and mpa files.. Using TMPGENC to change the format from 4:3 to 16:9 but when I clip the frame in TMPGENC i see these stripes in my video..

like on this picture: http://www.zeegers.be/stripes.JPG

can anyone tell me how to do this or what i do wrong ?

thanx !!

Kedirekin · 24th April 2004, 14:12

I think you're seeing the results of resizing interlaced video.

There isn't an easy way to explain what's happening. Resizing interlaced video mixes the odd and even lines in a field - some of the lines that were originally odd (and played back in the bottom field) become even and play back with even lines in the top field (and visa-versa). Even worse, some of the lines may end up spanning to two lines.

Personally I don't think there is any good way to turn a 4:3 interlace video into a 16:9 video. Since your target playback device is a widescreen TV (no letterboxing on playback) you might be able to get acceptable results if you're very carefull about cropping (i.e. get to the correct aspect ratio with no vertical resizing) - I've never attempted it myself though.

PS. I'm not sure where this thread belongs, but the Decrypting forum definately isn't it.

plasmascreen · 24th April 2004, 14:49

thanx for your answer...

whqt if i convert my vob files to avi first ? than i get rid of the interlacing... then convert to 16:9 mpeg ?
but quality-loss ?

cheers, plasma

Kedirekin · 24th April 2004, 15:44

Yes, deinterlacing might work. You can even use AviSynth with a deinterlace filter and avoid creating an intermediary avi file. I don't know if you'll be happy with the results of deinterlacing, but the only way to find out is to try it.

If you go the AviSynth route, you can get an idea of what it'll look like before you encode by opening the avs in VirtualDub (or any AVI editing tool). You won't be able to watch it at full speed (unless you have an insanely fast PC), but it'll give you some idea.

24th April 2004, 13:54	#1 \| Link
plasmascreen Registered User Join Date: Feb 2004 Posts: 17	stripes?? Hi all, Can anyone give me some help ? I want to re-author my wedding-dvd... So I have a DVD with the video in VOB format: AUDIO_TS VIDEO_TS video_ts.bup video_ts.ifo video_ts.vob vts_01_0.bup vts_01_0.ifo vts_01_0.vob vts_01_1.vob vts_01_2.vob vts_01_3.vob The video format is MPEG-2 720x576 PAL 625/50 4:3 25 fps format with mpeg-1 2ch 48kbps 20bps audio according to IFOEDIT I would like to reauthor this video and create a DVD with menu and my movie in 16:9 format so i can see it widescreen on my plasmascreen.. I already tried this: demux video stream from the main VTS_01_0.VOB file with resulting m2v and mpa files.. Using TMPGENC to change the format from 4:3 to 16:9 but when I clip the frame in TMPGENC i see these stripes in my video.. like on this picture: http://www.zeegers.be/stripes.JPG can anyone tell me how to do this or what i do wrong ? thanx !!

24th April 2004, 14:12	#2 \| Link
Kedirekin Registered User Join Date: Oct 2001 Location: Minnesota Posts: 1,110	I think you're seeing the results of resizing interlaced video. There isn't an easy way to explain what's happening. Resizing interlaced video mixes the odd and even lines in a field - some of the lines that were originally odd (and played back in the bottom field) become even and play back with even lines in the top field (and visa-versa). Even worse, some of the lines may end up spanning to two lines. Personally I don't think there is any good way to turn a 4:3 interlace video into a 16:9 video. Since your target playback device is a widescreen TV (no letterboxing on playback) you might be able to get acceptable results if you're very carefull about cropping (i.e. get to the correct aspect ratio with no vertical resizing) - I've never attempted it myself though. PS. I'm not sure where this thread belongs, but the Decrypting forum definately isn't it.

24th April 2004, 14:49	#3 \| Link
plasmascreen Registered User Join Date: Feb 2004 Posts: 17	thanx for your answer... whqt if i convert my vob files to avi first ? than i get rid of the interlacing... then convert to 16:9 mpeg ? but quality-loss ? cheers, plasma

24th April 2004, 15:44	#4 \| Link
Kedirekin Registered User Join Date: Oct 2001 Location: Minnesota Posts: 1,110	Yes, deinterlacing might work. You can even use AviSynth with a deinterlace filter and avoid creating an intermediary avi file. I don't know if you'll be happy with the results of deinterlacing, but the only way to find out is to try it. If you go the AviSynth route, you can get an idea of what it'll look like before you encode by opening the avs in VirtualDub (or any AVI editing tool). You won't be able to watch it at full speed (unless you have an insanely fast PC), but it'll give you some idea.