Non Complient VCD (4mb/s VCDs!!!)???

[Bcurve]

I have had some outstanding results encoding at 4 Megabits/sec. at MPEG1 352 X 240. While I don't have the resolution of a SVCD I get ZERO artifacts, and I can vary the bit rate to keep the size down. I would like to know if anyone else is playing with high bit rates. I am playing back on a Toshiba 2710. No SVCD playback, but with 4mb/s who needs it.
Anyone else pushing the bit rates?

[RevyJay]

I've been messing around with the bitrates as well. I usually like to try and keep the VCD's to 2 disks, so I do change the bitrate. The highest br I made was 2.2Mb/sec. I've never tried 4. How many minutes can you store on a VCD with 4mb/s? Just wondering.

[mpack]

On a similar note, I've just been experimenting with non-standard VCDs on my Sony DVD player. The Sony can't play SVCD, but it *does* allow higher res xVCD (eg. PAL 704x576), and higher bit rates (so far I've only tried 2.5mbps).

You might want to try higher resolutions as well.

[Jeff Perkins]

I am using an ATI All in Wonder card. I have been getting very good results capturing at 480x480 MP2 @6Mb/s. Is there any way I can make these video files SVCD compliant and keep the quality of the file? I would like make SVCDs all my old 8mm camcorder tapes. Capturing at 2.33Mb/s just doesn't cut it

[Mazrim Taim]

I've been capturing to Huffy's codec in virtuaDub using a Radeon 64DDR. 480x480, at 4 megs in mpeg 1 format....
Resulting xVCD's on my Apex 660 look phenomenal.....
(By the way I've experimented up to 6 megs but no real difference, and size is just too big....) I threw in a new DVD 12x DVD 48 x CD and I have been able to do Mpeg 2 SVCD at 720x480 at 7.5Megs and it looks like carbon copy to orginal DVD....
However, the picture quality on my APEX doesnt compare to that on Pioneer but I can't go higher than 2.x megs on it...
Regards
Mazrim Taim

[hitechjunkie]

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On 2001-11-14 17:56:53, Bcurve wrote:
I have had some outstanding results encoding at 4 Megabits/sec. at MPEG1 352 X 240. While I don't have the resolution of a SVCD I get ZERO artifacts, and I can vary the bit rate to keep the size down. I would like to know if anyone else is playing with high bit rates. I am playing back on a Toshiba 2710. No SVCD playback, but with 4mb/s who needs it.
Anyone else pushing the bit rates?

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i don't want to burst any bubbles, but encoding at 4Mbps CBR with a 352x240 rez is overkill. when i started making VCDs, i thought i'd never use anything less than 2300kbps CBR for my 352x240 VCDs, until i started using VBR encoding for the video. it was in using CQ_VBR, min 0 max 3000, on a 352x240 rez VCD, that i realized, while watching the encoding log, that TMPGEnc only used about 1900kbps avg for an mpeg in that rez. using anything greater in CBR mode just doesn't buy enough of an improvement to justify the loss in movie minutes on one disc.

i now use CQ_VBR on all my XVCDs, using a range of 850-1350 for the max on a 352x240 rez mpeg and a range of 1800-2350 for the max on a 352x480 rez mpeg. i just recently did "Iron Monkey", 86 minutes, using CQ_VBR of 0-1250, with a rez of 352x240, burning it to one 80min disc and WOW! does it look great on my 32" TV played on my JVC 523GD.

[mpack]

I've not tried VBR on an xVCD, because I assumed it was bound to screw up FF/RW etc. I should maybe try it though.

On the returns from higher bitrate: sending video uncompressed 352x240x30fps would need in excess of 40mbps (and even that assumes 16bpp). 1900kbps is a very long way short of that, so I'd be surprised if that is where the law of diminishing returns kicks in.

[mpack]

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On 2001-11-15 13:59:14, Jeff Perkins wrote:
Is there any way I can make these video files SVCD compliant and keep the quality of the file? ... Capturing at 2.33Mb/s just doesn't cut it
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Don't capture direct to MPEG if you can possibly avoid it - it's a nice marketing gimmick, but there's no way that your capture card has the time for high quality motion compensation etc in the 30-40 ms available between frames.

If possible capture using a lossless codec like Huffyuv, then use an offline mpeg encoder like TMPGEnc which can then have all the time it needs to achieve good quality.

Unfortunately you do need a fast machine and oodles of disk space for this to be practical.

[threev]

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On 2001-11-15 14:41:23, Mazrim Taim wrote:
I've been capturing to Huffy's codec in virtuaDub using a Radeon 64DDR. 480x480, at 4 megs in mpeg 1 format....
Resulting xVCD's on my Apex 660 look phenomenal.....
(By the way I've experimented up to 6 megs but no real difference, and size is just too big....) I threw in a new DVD 12x DVD 48 x CD and I have been able to do Mpeg 2 SVCD at 720x480 at 7.5Megs and it looks like carbon copy to orginal DVD....
However, the picture quality on my APEX doesnt compare to that on Pioneer but I can't go higher than 2.x megs on it...
Regards
Mazrim Taim

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I have an apex 660 and read in review that 2450 is tops for bitrate xvcd. But you are certain 4000 is ok?