Audio formats with slide show

DamonKelly · Post by **DamonKelly** » Mon Oct 30, 2006 1:28 pm

Where can I find a detailed list of supported audio formats for DVD Workshop Express 2?
I'm making a slide show with DWS2 (I know, not the ideal tool, but it suits me...)
I've ripped some music from a CD to MP3 with 128kbps/44KHz, and the audio plays fine.
When I use 256kbps, I get no sound in the preview.

Is it my ripping program, or DWS2?

TIA

DVDDoug · Post by **DVDDoug** » Tue Oct 31, 2006 1:38 am

I've never made a slideshow DVD, but I assume the standards are the same as regular video DVDs...

A PAL DVD (Australia) can have any one of 3 audio formats: LPCM, MPEG-2, or Dolby AC3. (The NTSC standard does not allow MPEG-2 audio.) It can also have additional formats, but these are standard. Every DVD must have at least one of these formats, and every PAL player must play all 3.

There is no point in ripping to MP3. This just adds an extra (lossy) encode step and an extra decode step. Rip to WAV, and let Workshop do the encoding. CDs and Wave files are LPCM*, which is uncompressed. However, CDs are sampled at 44.1kHz, and DVDs are sampled at 48kHz, so some conversion is always required.

* LPCM = Linear Pulse Code Modulation. For some reason, WAV files are usually just called PCM, but they are linear also.

htchien · Post by **htchien** » Tue Oct 31, 2006 4:42 am

Hi Kelly, lower the bit-rate and then it should work.

H.T.

Devil · Post by **Devil** » Tue Oct 31, 2006 10:29 am

DVDDoug wrote:
There is no point in ripping to MP3. This just adds an extra (lossy) encode step and an extra decode step. Rip to WAV, and let Workshop do the encoding.

Agreed, but you should also know that there is no standard for MP3 and video software simply will not accept many maverick versions of it, because it conflicts with true MPEG sound.

MP3 is normally (and standardised) as layer 3 of MPEG-1 (or -2) video. If it is demultiplexed out of the video stream, parts that could be essential to maintain synch are also removed by some software (not all). Therefore, it cannot be reintroduced into video, if this is the case. Only WAV is guaranteed to work, although faulty MP3 tracks can be converted to WAV and will then work.

DamonKelly · Post by **DamonKelly** » Sat Nov 04, 2006 12:08 pm

Thanks for the advice, everyone!
I should have guessed that selecting an "un-recoded" CD file would be best.

I will try it.

Thank again, everyone