Second audio and over-the-limit bitrate

[eaf]

Hi,

I've been encoding a relatively short movie yesterday night (1:19) to two 800MB CDs. Recognizing that it's probably an overkill to use two CDs for such a short movie, I set up the audio to compress at 224kbps, and started the rip.

Then, about 50% down the road I figured that I still have space for the second audiotrack, so I interrupted the rip, enabled the second audio (128kpbs), and hit "Rip and Encode" again. This time I got the warning that the total bitrate would exceed the maximum bitrate allowed by the SVCD standard, and some players may have problems with it.

What I don't understand is how addition of the second audio could increase the total stream bitrate. Since the number of CDs in the first and second attempts was the same, and the movie duration was the same, I'd expect that the total bitrate should also be the same. Yet, I didn't get any warning with one audio. Is it some sort of miscalculation, or do I miss something?

Thanks!

[ux-3]

If your max average video bitrate was low enough, the warning will only come with second audio. Also, two audio at 224 exeeds specs. (But who cares?)

[eaf]

So you're saying that with one audio DVD2SVCD wouldn't fill two CDs due to the restriction on the average bitrate? It makes sense. Can't verify it though, as CCE froze on me and I had to drop the bitrate down to 2000 (from 2230) to make things work.

[jshumate]

Bit rates are determined by video bit rate + audio bit rate. In your case it's video bit rate + audio bit rate 1st audio track + audio bit rate 2nd audio track. Let's say your video bit rate is 2400 and your
two audio tracks are each at 224. 2400 + 224 + 224 = 2848, which is
definitely over the limit of 2724. Each audio track's bit rate counts towards the final total bitrate.

[ux-3]

I thought I said that?
Also 2x228 is over specs, if I am not mistaken?

CCE should not die because of bitrate setting, unless your max bitrate and average bitrate are too close (do search on this). In that case CBR might be the better and more economic choice anyway, since there is little to distribute. I would raise the max, if player supports it. With two 228 audio, you've lost specs anyway, I think.