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A: Yes it does, but there are a few things you should consider. Multi-bitrate encoding
places higher demands on system resources than usual. It is entirely possible to
create a custom multi-bitrate profile that is impractical, either because its bandwidth
expectations are unrealistic, or because the encoding requires so many cpu cycles that
it can intrude into other important live functionality.
For this reason, we encourage you to use the profiles supplied with your system
whenever possible, and if you do opt to use a custom profile – especially a multi-
bitrate one – do perform meaningful testing in advance, to ensure everything goes as
planned.
Note: The Stream ID (text string) for multi-bitrate profiles must contain the character
combination “%i”, without the quotation marks. (The exact position of the character
combination does not matter, and spaces are permitted – though the latter may pose issues
for some CDNs.)
A multi-bitrate profile without “%i” in the Stream ID will produce a Flash Media Encoder®
error on attempting to stream. Also, the filename for multi-bitrate streaming recordings
TriCaster saves will automatically include the requisite “%i” (because the originating stream
ID contains it).
SUPPLEMENTARY QUESTION:
Q: Is it better to use a Baseline or Main profile for H.264 encoding?
A: Flash Media Live Encoder lets you choose either Baseline or Main type profiles in
the Advanced Encoder Settings that opens when you click the Configure (wrench)
button beside the Format menu (in the Video section of FMLE’s Encoding Options
tab).
At the time of writing, all NewTek H.264 profiles use the Baseline option as it seems
to be the best supported by various online services, and produces excellent results.
A.8 MORE QUESTIONS AND ANSWERS
A.8.1 CAN I DO ANYTHING TO IMPROVE LATENCY/AUDIO SYNC?
Latency might be defined as the ‘transit time’ for the a/v stream. Each device in the
video chain introduces some limited (transmission) delay.
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