On 3/6/07, David Gerard dgerard@gmail.com wrote:
On 06/03/07, Gregory Maxwell gmaxwell@gmail.com wrote:
Then we would, either via an automatic transcoding bot or via an upload enhancement to mediawiki automatically generate 40kbit/sec (dialup) and 96kbit/sec (broadband) versions from the lossless. These versions are what we'd link from our other projects.
I understand Ogg Vorbis was designed such that you can create a 96kbit/s frame by taking a 160kbit/s frame and stripping the end off.
It was designed that way, yes. However, various deep technical issue causes such simplistic conversion to sound bad. As a result a more sophisticated bitrate peeler is required, and no one has gotten around to coding one.
On my laptop, doing oggenc -q -1 flacfile is about 45x realtime. .. it's not something we would want to do on the fly for every load, but cached or at upload time it's not bad.