[Live-devel] ByteStreamFileSource

[Ross Finlayson]

>As an application programmer, when would I want to specify 
>playTimePerFrame to ByteStreamFileSource?

When you are streaming directly from a file, by reading/streaming one 
fixed-size chunk of data at a time.  This happens for many simple 
audio codecs (although not for more complex audio codecs like AAC or 
MP3, because their frames are typically variable-sized).  Because 
you're streaming directly from the file - without any separate 
intermediate 'framer' object - you need to tell the downstream 
"RTPSink" object the duration and presentation time of each 
(fixed-size) chunk of data that you're delivering.  Therefore, in 
this case, you need to tell the "ByteStreamFileSource" the duration 
of each chunk ('frame').

If, however, you are using a separate 'framer' object to parse the 
file data, then you should not specify "playTimePerFrame".  Instead, 
it will be up to the 'framer' object to specify the duration and 
presentation time of each parsed frame.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.live555.com/pipermail/live-devel/attachments/20070910/3e438a92/attachment.html