[vorbis] Slow stream opening (Was Re: Average Bitrate Calculation)

[Jay Sprenkle]

> While we're at it... On my testcase, it proved that opening an ogg stream
> using vorbisfile takes significantly (and I mean _really_ noticeably
> significantly) longer than opening an mp3 stream using amp11lib. It turns
> out that the problem is in the stream's seekability. If I don't provide the
> seeking callback, the thing works like a charm.
> I guess it is impossible to fix that for a VBR stream, right?
> (It's not like I need seeking anyway, but maybe someone will.)

Any editing is MUCH nicer if you can seek without having to decompress
the stream all along the way. On variable rate streams where you can't
calculate
a position it would be nice if precalculated positions in the stream
were available. When editing you could seek to the closest precalculated
position
then decode a much smaller amount of data to seek to the exact position
you want.

I'm editing video and it's a real pain with vbr mpeg streams.

_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com


--- >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 at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.