[vorbis] Questions about libvorbisenc

[Peron, Stéphane]

Many thanks for you help Michael,

>From the encoder_example.c source, I have added ogg support in my
application.
And it works very well .... 

But I have two questions :
- You say that I can track information like in oggenc ... Well, I have read
its sources but It is not very clear for me...
When I study  update_statistics_full ... It seems to be call for each file
.....And it far from clear for me ...
Sorry I am not a very good programmer .....
Would it be possible to have an easy example to track information like the
encoding progression for one file ?

- When I see the .ogg that are created, I note that for the same original
wave file, they have not the same size ... Do am I wrong ?

Many thanks again for your work and your help ...

Stéphane PERON

> >Hi all,
> >
> >I am just coming in the mailing list.... ;-)
> >
> >I'm working on an Ripper/Encoder for GNUstep.
> >At first sight, libvorbisogg seems to be the library that I needed.
> 
> This is a bit confusing - there are two main libraries, libogg, and 
> libvorbis. They're seperate and independent. I don't know what exactly
> you mean by 'libvorbisogg'.
> 
> >The problem for me is documentation. 
> 
> Yes, the documentation is lacking - we have limited resources.
> 
> >So I have a few question about this library : 
> >- in order to init an encoding process, we need to provide channels.
> Well,
> >what does is mean ?
> 
> The number of channels in your input audio - i.e. 1 for mono, 2 for
> stereo,
> etc.
> 
> >- in order to init an encoding process, we need to provide rate ... What
> is
> >this rate in comparison with bitrate ?
> >is it 48khz ? so I have to put 48 ?
> 
> Sampling rate. For CD audio, this is 44100. 48000 is another fairly common
> value. Whatever you're getting the audio from (a wav file, for example)
> will have this information. It's independent of bitrate, though obviously
> a higher sampling rate means more information, which means a higher
> bitrate. Values are in Hertz (Hz).
> 
> >
> >- I would like to get the real time rate of encoding  : Is it possible
> with
> >libvorbisogg ?
> 
> libvorbis will just encode the data for you - if you want to find out
> how fast it is encoding, you have to track that information seperately
> (as oggenc does, for example).
> 
> >
> >And finally, is there any very simple example using libvorbisenc ?
> 
> In the source tree, look at vorbis/example/encoder_example.c - that's
> a simple and minimal example (though it doesn't show how to do
> managed bitrates, you needn't bother with that for a first version).
> 
> 
> Michael
> 
> 
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