How would I go about creating a vorbis file with more than two tracks? How difficult would it be to create, say, a file that had a left, right and bass track? Or even a vorbis file that had all the tracks available in an ac3 file? --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Monday, April 23, 2001, at 03:02 , Nathaniel wrote:> How would I go about creating a vorbis file with more than two tracks? > How > difficult would it be to create, say, a file that had a left, right and > bass > track? Or even a vorbis file that had all the tracks available in an > ac3 > file?vorbis currently compresses each channel independently, and can handle arb. numbers of channels, I believe. Certainly some tests have been done with four channel audio. You should be able to access this just by handing the encoder a multi-track .wav file. Or if you're writing your own software, just set the proper number of channels and take care of interleaving the samples. There's no real way to say what channel is what right now. We've talked about surround formats in the past, and there's a general plan to support them and a way of identifying things, but they're both looking a ways off unless someone (you?) comes forward to work on a design/implementation. Hope that's helpful, -ralph --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
At 05:02 PM 4/23/01 -0500, you wrote:>How would I go about creating a vorbis file with more than two tracks? How >difficult would it be to create, say, a file that had a left, right and bass >track? Or even a vorbis file that had all the tracks available in an ac3 >file?Oggenc supports n-channel wav files, if you can create them (note: as far as I know, this has never been tested for n > 2. I've never tested it, but it should work). However, I doubt any of the widely used players support multichannel output. Also, there is no way (yet) of specifying what each track is. That's something that is needed, but nobody has done it yet. For a specific purpose, however, you could just give your own definition of what each channel does, and write a custom player for that. Michael --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.