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SVCD tip

December 20 2002 at 5:04 AM
  (no login)

 
I mostly make DVD's these days, but with CD's now coming as cheap as 20 cents apiece, its hard to ignore the SVCD option.

One issue that I have with SVCD is that I find MPEG2 gets blocky and mushy much under 2mb per sec, but the spec only lets you go up to 2.5, and then you can't fit your damn program onto a single CD. VBR helps, but bitrate spikes can cause player malfunctions, and higher bitrates can even take many DVD players out of the SVCD game entirely.

Here's the tip then: If you have a product like Womble that can stitch encodes together without reencoding then make yourself 5-10 seconds of black screen at the same encode rate and type as your program. Then stitch it at the beginning of each segment.

Why? Because even at 2.5mb per second, black screen will come in at a super low actual bitrate and give your DVD player a running start at the actual higher bitrate of the program. My Pioneer player stutters easily with higher bitrates, but if I do this, it can handle 90+ per cent of higher bitrates with only a rare skip in the program.

I therefore suggest that this can limit incompatabilities and allow you to maximize the bitrate of your encode.

cheers,
mark


 
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(Login luisifer)

Re: SVCD tip

December 20 2002, 2:42 PM 

I Know with the Really Cheap Player That I have I can use Bitrates up to 6000KBS without Much of a Problem But I try to keep it below 4500kbs, and I noticed Some encoders Will have a Tendancy to have Bitrate spikes that go much higher than the Max Bitrate you specify...Tmpgenc Is Quite notorius for this, But CCE will Usually stay within the Bitrates that are set so I dont get the jumpyness that caused By the Bitrate spikes...There are a Lot of Players That will Let you go way out of the SVCD specs and still perform quite well with Higher Bitrates and Resolutions, But you have to Know what players they are, I brought a XSVCD with me when I went shopping for My DVD Player, this XSVCD had a Max bitrate of 8000kbs and a Resolution of 704+480, and Looked for the Player that Could Play this Disk the best and It turned out that one of the cheapest Player in the store was the One that played it the best, which was a ElectroHome which was $149 Canadian, and it works great and Plays everything even SVCDs and VCDs with AC3 Audio.....

 
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