DVD Sound

[Dave Knowles]

Hi,

Is the sound created for a DVD by a programmes such DVD Workshop, MainConcept or TMPGEnc a different format than that on a commercial DVD?

[chazzie]

Most Commercial DVD's use Dolby Digital, DTS or in rare occations PCM. MPEG audio i also used in europe in some cases. So to answer your question, yes and no. I assume TMPGEnc uses MPEG audio, so that's a standard in Europe, but not in North America.

[bugster]

AFAIK, the DVD standard requires ALL DVD players to support PCM (uncompressed) audio at 48khz sampling. In NTSC areas Dolby Ac3 support is also required but in PAL areas MP2 is required instead.

All Consumer level DVD authoring programs support PCM and many support mp2. AC3 creation is generally only supported by higher end authoring programs due to high licensing fees for the dolby encoder. Many consumer level apps will import Ac3 created externally.

Hope this helps

[SLICK RICK]

deleted

[Dave Knowles]

Hi,

When I make a DVD using DVD Workshop and try and make a VCD in Eazy VCD the sound shows as "1. ??? (MPEG1 2ch, 0xC0) [0]" but if I put in a commercial DVD I get "VTS(01)PRG(0)02.31.17.15(907715)" etc. Could this be the reason for my VCD's made with Eazy being out of sync?

[Vejita-sama]

VCDs and DVDs are NOT the same thing. See the what is section to the left for more info. Basically a VCD uses MPEG1 layer II 224kbit/s 44.1khz audio. While DVDs use AC3 (or PCM) 384kbit/s (acutally several bitrates are used) 48khz audio.

You can't directly compare the two. The main reason for sync issues in VCDs are:

1) VCD was made from a DivX/xvid source which had VBR mp3 audio stream.

2) Framerate errors during encode

3) Source is from a DVD rip with an audio delay file

[Dave Knowles]

Hi,

How can I check if the source is from a DVD rip with an audio delay file?

Is there any way to make sure it is in sync?

The programme Eazy VCD does everthing automatically and other people do not seem to have problems.

Eazy VCD is saying that the DVD sound is "1. ??? (MPEG1 2ch, 0xC0) [0]" so I presume that the authoring programme is recording the wrong sound. Would this create problems with playback then?