user1177: I'm looking to stream some video from Flash Media Live Encoder with a video bitrate of around 150 Kbit/sec and audio of 50 Kbit/sec. The video will contain quite a lot of movement which I want to try and represent as faithfully as possible. Is there a particular flavour of H.264 that I could use to optimise the results at a resolution of 384x216 i.e. which profile?
Thanks

user1820: If you are going for a lot of motion, make sure you set a higher I frame rate. An I frame is a whole frame that you are going to need with quick motion.
Also, check out this link http://www.adobe.com/devnet/flash/apps/flv_bitrate_calculator.html for some basic settings. That shows you that 150kb/s is way to slow to keep a good picture. For SD material, bitraters of around 500kb/s with fast motion is recommended.

user1661: It also depends a lot on your target platform. High Profile will compress better than Main Profile, but not all devices can decode High Profile with large frame sizes. A few cannot decode High Profile at all. 
I have had considerable success encoding motor racing in SD (852x480, actually) at 768kbps using High Profile. Even though you have a quarter the frame size, I suspect 150kpbs is extremely optimistic.

1177: <p>I'm looking to stream some video from Flash Media Live Encoder with a video bitrate of around 150 Kbit/sec and audio of 50 Kbit/sec. The video will contain quite a lot of movement which I want to try and represent as faithfully as possible. Is there a particular flavour of H.264 that I could use to optimise the results at a resolution of 384x216 i.e. which profile?</p>

<p>Thanks</p>
 1820: <p>If you are going for a lot of motion, make sure you set a higher I frame rate. An I frame is a whole frame that you are going to need with quick motion.</p>

<p>Also, check out this link <a href="http://www.adobe.com/devnet/flash/apps/flv_bitrate_calculator.html" rel="nofollow">http://www.adobe.com/devnet/flash/apps/flv_bitrate_calculator.html</a> for some basic settings. That shows you that 150kb/s is way to slow to keep a good picture. For SD material, bitraters of around 500kb/s with fast motion is recommended.</p>
 1661: <p>It also depends a lot on your target platform. High Profile will compress better than Main Profile, but not all devices can decode High Profile with large frame sizes. A few cannot decode High Profile at all. </p>

<p>I have had considerable success encoding motor racing in SD (852x480, actually) at 768kbps using High Profile. Even though you have a quarter the frame size, I suspect 150kpbs is extremely optimistic.</p>
