Configure settings for H.264 video
Important: These options pertain only to video encoded with the H.264 codec. Use these options carefully. The settings affect the way that Flash Media Live Encoder uses the CPU and memory. These settings persist until the next time you readjust them.
With H.264 selected, click the settings icon 
next
to the Video Format box.
In the Advanced Encoder Settings dialog box, configure any
of the following settings:
- Profile
- Select either the Baseline or Main profile.
The Baseline
profile is commonly used in video conferencing, mobile applications,
or other applications which operate with limited processing power, storage
capacity, and bandwidth. The Main profile is appropriate for applications
that broadcast media, such as network broadcasting, and requires
1.5% more processing power than the Baseline profile.
- Level
- Flash Media Live Encoder supports all available levels. Here
are some examples of the resolution and frame rate achieved with
different levels:
Type
|
Level
|
Maximum resolution (width x height)
|
Frame rate (frames per second)
|
|---|
Standard definition
|
1.3
|
352 x 288
|
30 fps
|
Standard definition
|
3
|
720 x 576
|
25 fps
|
High definition
|
3.1
|
1280 x 720
|
30 fps
|
High definition
|
5.1
|
1920 x 1088
|
120.5 fps
|
Encoding with the H.264 codec is CPU-intensive.
Adobe recommends that you select a level and video size that enables
CPU usage to remain below 75% during encoding.
For more information
on H.264 profiles and levels, see commonly available resources about
the H.264 video codec, such as the ISO/IEC 14496-10 standard on
the ISO website and Wikipedia.
- Keyframe frequency
- The interval at which to insert keyframes. The default is 5
seconds, which means a keyframe is inserted every 5 seconds.
