XVCD vs plain SVCD

[JoeBob]

Well my question is since therectically MPEG-1 and MPEG-2 at the same resolution and bitrates should have the same visual quality, if I use TMPGEnc would MPEG-1 at the resolution and 2-pass VBR with bitrates equal to those I'd use for SVCD look as good at if I made a SVCD? I ask because I know some encoders are better then others, and I don't know how good TMPGEnc is at MPEG-1. I'm making XVCDs at SVCD res and VBR settings because it takes half the time to encode...

[Vejita-sama]

TMPGenc can encode MPEG1 faster than MPEG2. And yes at the same resolution and bitrate the video looks the same. MPEG2 supports things that MPEG1 does not thou: interlace, multiple audio tracks, subtitles, multi-angles, etc.

So a 2pass VBR xVCD at 480x480, min=0, max=2550, ave=1500
vs SVCD 480x480, min=0, max=2550, ave=1500 should look the same, and because the xVCD is MPEG1 it should encode faster.

If you use the same settings you'll get the same quaility (save for stuff that's not supported in MPEG1)

[JoeBob]

Ah, perfect... My DVD player doesn't support subs for SVCDs and the other things that MPEG-2 supports that MPEG-1 doesn't really aren't that important for me. Thanks alot for the info though, this will sure cut my encoding times by alot

[Yeshi]

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On 2001-10-14 20:34:56, JoeBob wrote:
Well my question is since therectically MPEG-1 and MPEG-2 at the same resolution and bitrates should have the same visual quality, if I use TMPGEnc would MPEG-1 at the resolution and 2-pass VBR with bitrates equal to those I'd use for SVCD look as good at if I made a SVCD? I ask because I know some encoders are better then others, and I don't know how good TMPGEnc is at MPEG-1. I'm making XVCDs at SVCD res and VBR settings because it takes half the time to encode...
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Well i tried the same thing, because i wanted to used Ce-Quadrat's menu author which only supports MPEG-1 streams, so i encoded at MPEG-1 480x480 23.97 FPS. the QUALITY was as good as MPEG-2, but... none of the selectable aspect ratio's would play correctly on my DVD player. the only aspect ratio it would show correctly was 4:3 MPEG-2. thats why i dont use 480x480 MPEG-1 streams

[Vejita-sama]

There could be a lot of reasons you had problems. Despite being part of the white book standard a lot of DVD players have trouble playing 23.976fps VCDs. Also by changing the resolution you made a xVCD which some players also don't like. As for the DAR vs resolution... well there are a lot of things that could have gone wrong there

[Yeshi]

Nope, my DVD player plays 23.97 FPS SVCD's and XVCD's without any problems whatsoever. Once the size is changed to 480x480 in MPEG-1 STREAM, it goes abit wacky.