dear vorbis developers, it would be very useful, if oggenc would support constant low-bandwith bitrates for testing. something from 20kbps to 44kbps, so anyone could test streaming over modem and isdn. audio quality doesn't matter. mörk --- >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-dev-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 06:03 PM 3/14/01 +0100, you wrote:>dear vorbis developers, > >it would be very useful, if oggenc would support constant low-bandwith >bitrates for testing. something from 20kbps to 44kbps, so anyone could >test streaming over modem and isdn. audio quality doesn't matter.Low bitrate low-quality modes are supported. Just feed it appropriate input (e.g. 22.1kHz mono - that should be around 30-40 kbps, at a guess, if you also select a low-bitrate mode using -b). _constant_ bitrate modes are not yet supported, and won't be until some additional features exist in libvorbis (these features are planned for 1.0, and will be in the next beta/release candidate) 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-dev-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 Thu, 15 Mar 2001 19:27:07 +1100, Michael Smith wrote:>>I get 60-70 kbps. > >I just tested on a 22kHz/mono file, as I suggested. 31.5 kbps - on only a >single file, but it should be fairly representative. > >Make sure you select a low-bitrate mode rather than just using the default >(which is much higher than you want).Okay, I tested it again and I was sure not to get that low, but you're right. Maybe I used -b 112 before, oggenc -h says this is the lowest bitrate. Now I used -b 1 which encodes with the lowest possible bitrate and I've got a 32.5kbps file. And it doesn't sound worse than mp3 (lame --abr 32), although oggenc is not optimized for low bitrates. It's more transparent than mp3, but the snare sounds a bit artificial (and distorted?). Vorbis sounds better at low bitrates than I thought (not as good as realaudio, but maybe one day. Generally it's hard to say what codec is better at low bitrates. Some people say the best is WMA, but I always hear the steadily flowing cymbals. Sometimes it's a matter of taste). Thank you Michael, now I could listen to my test stream at home, if I get my script to pipe a wav header to oggenc (hope I doesn't need sox, I hate it) :). --- >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-dev-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.