Can a too high BITRATE cause playback problems in svcd?

[Mocha]

I am currently converting a 84 minute DIVX to a MPEG2 SVCD file using CBR of 2520 kbps(default) and audio bitrate of 224kbps, using normal motion search precision. Using the java bitrate calculator on this site, to burn this movie on 1 80 minute cd, the calculated average bitrate is 1062 kbps, for 2 80 minute cds, the calculated average bitrate is 2349 kbps, and to burn on 3 cds and more, the calculated average bitrate is the max svcd bitrate of 2496.

If I burn the converted svcd, will there be problems in burning or playback because the bitrate of 2520 kbps is higher than 2359 and 2496?
Are the calculated bitrates minimum or maximum thresholds?

THx

[SingSing]

I think this depends on your DVD player.
encode it less than 2520 is a safer bet.

[DJRumpy]

2520 is within the standards for SVCD (if your audio is only 224kbs), and should not pose a problem, assuming your player supports SVCD.

[medievil]

as previously stated, depends on the dvd player. I personally do DVD tests using a cdrw (My player can't read dvd-rw) by burninng test vobs (720*480 VBR avg of around 4mbs) as Svcd using nero. They play perfectly on my Daewoo 5700.

[gll99]

If you are experiencing problems you may want to post the rest of your specs.

[SingSing]

as previously stated, depends on the dvd player. I personally do DVD tests using a cdrw (My player can't read dvd-rw) by burninng test vobs (720*480 VBR avg of around 4mbs) as Svcd using nero. They play perfectly on my Daewoo 5700.

How many minutes did you manged on a CD ?

[DJRumpy]

medievil, if a player properly supports the SVCD standard, then 2520 Video and 224 audio will play. Period. There is no guessing. It fits within the standard.

2520 + 224 = 2744

PAL


Video:
max 2524 kbit/sec MPEG-2 (if the audio is in 224 kbit/s), audio + video bitrate max bitrate is 2748 kbit/s.
480 x 576 pixels (CVD 352x576)
25 frames/second
with up to 4 Subtitles

Audio:
from 32 - 384 kbit/sec MPEG-1 Layer2
with up to 2 Audio Tracks

Extra :
Menus and chapters.
Still pictures 704x576,352x288




NTSC / NTSCFilm


Video:
max 2524 kbit/sec MPEG-2 (if the audio is in 224 kbit/s), audio + video bitrate max bitrate is 2748 kbit/s.
480 x 480 pixels (CVD 352x480)
29,97 frames/second
23,976 frames/second (NTSC Film)
with up to 4 Subtitles

Audio:
from 32 - 384 kbit/sec MPEG-1 Layer2
with up to 2 Audio Tracks

Extra :
Menus and chapters.
Still pictures 704x480,352x240

[medievil]

medievil, if a player properly supports the SVCD standard, then 2520 Video and 224 audio will play. Period. There is no guessing. It fits within the standard.

I understand that, My point was that Alot of DVD players use treat SVCD just as they do DVD (After all it's the same Mpeg2 decoder used no matter which is being played). the Limitation is in the Operating system the DVD player uses.

[medievil]

as previously stated, depends on the dvd player. I personally do DVD tests using a cdrw (My player can't read dvd-rw) by burninng test vobs (720*480 VBR avg of around 4mbs) as Svcd using nero. They play perfectly on my Daewoo 5700.

How many minutes did you manged on a CD ?

ummm, I don't do those types of tests. I usually do test captures beforehand to make sure all the settings are good. I then convert to dvd (720*480, 384 48K sound) and burn the vob as SVCD.
Given that my average capture/converted DVD is roughly 3gb, your looking at 4 80mn cdr's for about 20-30 min max per cd.

[DJRumpy]

Don't worry medievil. I'm not bashing.

It's just confusing for a newbie if you give them an ambiguous answer to a very specific question. Mocha wanted to know if those bitrates would work properly under the SVCD format. The answer is yes.

[medievil]

Don't worry medievil. I'm not bashing.

It's just confusing for a newbie if you give them an ambiguous answer to a very specific question. Mocha wanted to know if those bitrates would work properly under the SVCD format. The answer is yes.

No, No, I didn't think you were bashing. I just though I might have been confusing in my post!

[Mocha]

Thx a lot people. I didn't realize 2744 total bitrate was the svcd max. According to the online bitrate calculator, the max is 2496 + 224. Playing a 40 minutes television episode on svcd using WIndvd4, I went to navigation->setup-> information, and the video bitrates they showed were 2528 video and 224 audio. Thus the total was higher than the maximum you stated. THose svcds play fine in my pc dvd player.


SO to achieve maximum quality, I should use CBR 2520, not 2496, if using 224k audio? IF the bitrate calculator shows a calculated bitrate of less than 2496 with 224 audio, should I then add another CD?

THe confusing thing is that when playing a Grease svcd I downloaded, the audio was 224 and the video was 1.673 Mbps. It was for 2 80 minutes cds and letterboxed 4:3, resolution 480 x 480. WHen there was a lot of movement, the figures could look slightly blocky, but not too noticeable.

[Mocha]

Also...is there a more accurate bitrate calculator than the the online java one on this page, which seems to be inaccurate.

[DJRumpy]

Most players will allow you to exceed the maximum by a small amount. Some are very strict. As long as you stay within those bounds though, and your player is SVCD compatible, then your all set. If you need more Video bitrate, just reduce your audio bitrate by the same amount (I wouldn't suggest dropping below 128kbs or 96kbs unless your audio source is poor to begin with).