--- Forwarded Message from "kate hammond" <[log in to unmask]>
---

>From: "kate hammond" <[log in to unmask]>
>To: "'Language Learning and Technology International Information Forum'"   
<[log in to unmask]>
>References:  <[log in to unmask]>
>In-Reply-To:  <[log in to unmask]>
>Subject: RE: #8868 sound synching with H.264
>Date: Mon, 16 Jun 2008 19:40:31 +0100
>Thread-Index: AcjP1Y9YEoX0uQgQTQ+9PuPQrrC9ygACVZ8w

Hi Dick

We use ffmpegX for all our conversions but this should work.  Assuming you
have mp4 originals open them in QuickTime Pro and export as Movie to hinted
movie.  Set the options H264 Video track hinter settings. Make sure the rtp
payload settings are to QuickTime not H264 Video.
	
Hope this helps and I have got it right but we have not done it for a while.
I know last time we had to play with the audio settings.

Regards
Kate

-----Original Message-----
From: Language Learning and Technology International Information Forum
[mailto:[log in to unmask]] On Behalf Of LLTI-Editor
Sent: Monday, June 16, 2008 6:21 PM
To: [log in to unmask]
Subject: #8868 sound synching with H.264

Friends,
We are setting up a QT Streaming Server to play full-length movies.  I  
have dealt with the legal aspects of this with our university  
counsel.  We find that a ways into playing a movie from the server,  
the audio begins to work ahead of the video.  This becomes intolerable  
before the end of the film.
Here are the specs we are currently using.  Here are the specs we have  
tried most  recently.   Any suggestions or directions to work on  
appreciated.

* Apple G5 OSX Streaming Server Tiger 10.4.10
* 2 GHz Power PC processor
* 1 GB DDR SDRAM
* OSX 10.4.10
* QuickTime Player 7.1.2
* 80 GB Boot Drive

Current info as pertains to using QuickTime to export files for  
streaming:

* QuickTime (.mov file extension)
* H.264 compression
* Compressor Quality: high (multi-pass)
* 29.97 frames per second frame rate
* 220 kbits per second bit rate
* 640x480 screen size
* AAC stereo audio @ 128 kbits per second bit rate
* Hinted for streaming

Dick Feldman, Director
Language Resource Center
Cornell University
lrc.cornell.edu



***********************************************
 LLTI is a service of IALLT, the International Association for
Language Learning Technology (http://iallt.org/), and The Consortium for
Language Teaching and Learning (http://www.languageconsortium.org/).
Join IALLT at http://iallt.org.
Otmar Foelsche, LLTI-Editor ([log in to unmask])
***********************************************