48khz downsample for svcd is a waste..

[Physick]

For me that is. All this time I have been dropping it to 44khz only to find my player plays 48khz perfect with no problems. I take it 48khz isnt using a whole lot more space over 44khz right?

[JHebert]

I don't think 48khz uses any more space than 44khz at all, assuming the same bitrate. Its just the sampling rate that is different.
I also skip the audio downconversion and leave it at 48khz on my VCD/SVCD and I have no problems. However, some DVD players may not like it and will play with static, skips, or lose audio/video sync. It depends on your player, and if you want to be standards compliant.
Also, DVD Video uses 48khz ac-3 or pcm audio so if you want to transfer your SVCD to DVD in the future it might be better to leave it at 48khz.

[salvius]

Bad idea, you're creating a non-compliant SVCD and some players WILL complain.

[Truman]

Yes, bad subject. The SVCD standard requires 44,1 kHz audio and my dvd player too.

[vivisimonvi]

I just started using TMPEGnc with TooLame to convert audio streams at 48,000 Hhz. Does this make an audio stream that matches VCD standard? Previously I've been using the Panasonic Plug-in (PWI) to make audio/video streams (using that DVD2MPG Squeezer program), but I can't seem to figure what sampling rate this encoder uses, except the compression bitrate. Does anyone know this as well?

[salvius]

No 44.1 is VCD/SVCD standard. Do use it to create a standard fully compliant disc.

[kinneera]

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I don't think 48khz uses any more space than 44khz at all, assuming the same bitrate. Its just the sampling rate that is different.
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Well, yes and no. Assuming the same number of bits per sample, it will be a higher bitrate. A standard WAV at 44.1Hkz has a bitrate of 1411Kbps, whereas the the 48Khz has a bitrate of 1538Kbps (if I recall correctly). So keeping it at 48Khz but MP2 encoding it at the same 224Kbps is theoretically going to reduce the sound quality about as much as if you just downsample it to begin with. This being the case, you might as well make it standards-compliant by downsampling it.

[jgl24]

why are you all starting out with 48 kHz?

That's what I've been trying to do for weeks,
but my capture card will only do 44.1 kHz. I
have to resample all the audio up to 48 to make
DVDs. What capture cards are you using?

[JHebert]

Three possible ways to start with 48khz audio:
- DVD rip
- capture MiniDV or Digital8 via Firewire/1394
- capture via TV card and sound card with 48khz audio