[linux-audio-user] Analyzing ogg files

[Mark Knecht]

On Mon, 2003-12-01 at 20:08, Ross Vandegrift wrote:

> Check out ogginfo(1) - it should've come with vorbis-tools and tells you
> all that good stuff:

Thanks. That's definitely more interesting. I still don't see what
should cause one to create a huge popping noise when it starts and the
other doesn't.

My suspicion is that the first one, which pops, is generated from 240bit
audio, whereas I'm thinking that the second is generated from 16-bit
audio, but I don't know that for sure, and ogginfo doesn't seem to tell
me.


bash-2.05b$ ogginfo gmc2.ogg 
Processing file "gmc2.ogg"...

New logical stream (#1, serial: 3691a8a7): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20011231 (1.0 rc3)
Channels: 2
Rate: 44100

Nominal bitrate: 128.031000 kb/s
Upper bitrate not set
Lower bitrate not set
Vorbis stream 1:
        Total data length: 4372644 bytes
        Playback length: 5m:05s
        Average bitrate: 114.389712 kbps
Logical stream 1 ended
bash-2.05b$ 
bash-2.05b$ 
bash-2.05b$ ogginfo examplesustain.ogg  
Processing file "examplesustain.ogg"...

New logical stream (#1, serial: 6378c0ce): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20020717 (1.0)
Channels: 2
Rate: 44100

Nominal bitrate: 224.000000 kb/s
Upper bitrate: 256.000000 kb/s
Lower bitrate not set
Vorbis stream 1:
        Total data length: 3122631 bytes
        Playback length: 2m:08s
        Average bitrate: 193.935677 kbps
Logical stream 1 ended
bash-2.05b$