Hello again.
Did some capturing from my satelite and encountered a weird problem.
I capture with ati software and I changed a bit the bitrate.
When burning with Nero it encodes the video AGAIN.
When capturing with the default svcd setting it does not happen.

Any ideas what to do or what not to do...?
Thanks

Its because the captured file is not SVCD compliant, therefore Nero encodes it to be so.
If you dont want Nero to encode it then just burn it in datamode.

Cheers Flemming

Rather than burn the file as non-std, you may wish to consider why the file doesn't meet SVCD stds, and try and fix it.

You certainly don't want Nero to reencode; it will do an awful job.

There are several places to start. What is your screen size, is it std for SVCD? That should be 480x480 for NTSC for example. Secondly, what is the data rate? Off the top of my head you'd want something VBR or CBR from around 1700-2500 including the audio.

BTW, what is audio? Many permeations are possible, but I recommend sticking with 224 mpeg2.

Another issue is muxing. Sometimes the file is otherwise correct, but not muxed appropriately for SVCD. Try demuxing and remux using a tool like MPEGVCR.

I'm no ATI expert, but I should think that their more advanced products could make SVCD compliant from the get go. I had a cheapy TV card that didn't, but that was ages ago.

good luck,
mark

Something you changed is making your captures non-compliant, as Mark said. You need to either figure out what it is and fix it, or use the SVCD default setting. A demux/remux might fix your problem is the average bit rate in your video is within specifications.
That means that the combined video+audio bit rate can't be more than 2724 Kbps and the video bit rate alone can't be more than 2600 Kbps.

With your great help and wasting another 4 hours I fount the bug.
I was encoding with a "changed svcd" template.
The moment I defaulted every feature it worked.
But there is something else that bothers me now :
Why , the moment I raise the bitrate , the file size drops ? Wouldn't it be more logical to be the other way around ?

Maybe you go from constant bitrate to variale bitrate.
Constant bitrate usually produces larger files than variable bitrate does.

Yeah . I just noticed that .
Does it change the quality of the captured file ?
I'd rather have bigger files than bad ones !

Good question. In theory, variable bit rate can help improve some scenes by allocating more bits than your average bit rate if necessary in high motion scenes. It has been much debated and personally, I stick to constant bit rate because it's just easier to deal with. Some people think constant bit rate does give better quality, but former forum regular Rich Aubin was admanant that variable bit rate was the best. One possible problem is that while your capturing software can use VBR to allocate more bits when needed, it can also take away bits when it thinks you don't need them and there is the possibility that it might take away bits when you don't want it to. The best bet if you must use VBR is to encode using it, not record using it. Software encoders do make a good judgment as to when to use fewer bits because they analyze the video first, but when you record on the fly, you can only hope that your recording software makes a good decision about what bit rate to use.