I have a problem that I can't seem to fix. I have a DVD on my computer that has been encoded with DTS in .VOB files. There are 6 .VOB files in total and the video and audio are both written to them.
The problem is that my DVD player doesn't decode the DTS audio. How would I go about converting these VOB files (with the video) to an AC3 format?
I've tried besweet, but I can't get the bloody thing to work and I'm pretty sure it creates audio files.
Not that straightforward, sad to say.
First you will need to extract the DTS stream from the VOB. If you can find it, DVDDecrypter is the boy for this - set to enable stream processing, go into IFO mode & select the stream you want to extract.
The real issue is decoding the DTS stream back to PCM.
Try looking for Hypercube.
There is also an application called Tranzcode that does this.
Encoding to AC3 is going to give you a nasty quality hit though.
DTS is already compressed, and AC3 is even more compressed.
Besweet will NOT necessarily give you a DVD compliant stream either, as it's a reverse engineered hack job.
This sounds strange? Who made the DVD? Did you buy it or was it created by a friend?
It is strange because all proffessional DVDs (DVD-Video) must contain Dolby Digital audio streams. DTS streams are optional and can't replace the Dolby Digital stream, DTS is always an add-on.
Do you have an audio receiver? The easiest way to listen to the DTS stream would be to connect your DVD player to a DTS decoder using a Coax or Optical connections (via S/PDIF). Your DVD player doesn't decode DTS but it should at least pass the DTS stream to a decoder if set-up correctly. If you don't have a receiver that has a DTS decoder built-in then the cheaper option would be to buy a DVD player that does decode DTS audio streams.
Quote:This sounds strange? Who made the DVD? Did you buy it or was it created by a friend?
It sounds like a bootleg disc to me.
Quote:It is strange because all proffessional DVDs (DVD-Video) must contain Dolby Digital audio streams. DTS streams are optional and can't replace the Dolby Digital stream, DTS is always an add-on.
Sort of.
What the spec says is that there must be at least one of the mandatory streams set as stream 1 to be in spec.
Mandatory streams are any of the following:
PCM Stereo at 16/48
Dolby Digital (AC3) stereo
Dolby Digital (AC3) Surround
As long as one of these is stream 1, the disc is in spec. It is perfectly possible to author an out of spec disc, but the problem is what happens here.
DTS audio is an optional stream, and no players are required to deal with it at all.
Quote:Do you have an audio receiver? The easiest way to listen to the DTS stream would be to connect your DVD player to a DTS decoder using a Coax or Optical connections (via S/PDIF). Your DVD player doesn't decode DTS but it should at least pass the DTS stream to a decoder if set-up correctly. If you don't have a receiver that has a DTS decoder built-in then the cheaper option would be to buy a DVD player that does decode DTS audio streams.
Agreed - in principle.
In reality, no player has to handle DTS even in passthrough mode.
If the player cannot handle DTS Passthrough, it will never work and you will only ever get a white noise hissing sound.
There are 3 types of DTS support in DVD players.
1 - Passthrough. Outputs the raw DTS bitstream to an external decoder.
2 - Stereo only. Outputs Stereo PCM and downmixes internally
3 - Full internal decoding. Outputs a 5.1 PCM stream through optical or HDMI outputs.
