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video_encoder_second_thread_threshold=408950

H264 profile-level-id detection

Since build 5.2.1644 a command line tool is available to detect H264 encoder profile-level-id according to encoding parameters:

sudo bash /usr/local/FlashphonerWebCallServer/tools/h264_profile_tool.sh --config=codec,resolution,profile,level[,preset]

Where

• codec  - encoder name: OPENH264  or FF 
• resolution - resolution
• profile - encoding profile
• level  - encoding level
• preset - encoding preset

For example, with the following encoding parameters

sudo bash /usr/local/FlashphonerWebCallServer/tools/h264_profile_tool.sh --config="OPENH264,1280x720,66,31,ultrafast"

the tool will display the following profile-level-id 

42c01f <= "OPENH264,66,31,ultrafast,1280x720"

The tool also may generate a full supported profiles list for all encoders

sudo bash /usr/local/FlashphonerWebCallServer/tools/h264_profile_tool.sh --catalog --output=catalog.csv

or for certain encoder

sudo bash /usr/local/FlashphonerWebCallServer/tools/h264_profile_tool.sh --catalog --encoders=OPENH264 --output=openH264.csv

The list is generated as CSV file in the form

codec,profile,level,preset,resolution,profile-level-id

for example

FF,0,0,fast,320x180,42c01e
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If there is no encoder library in the server distribution, the tool will display the following error while requesting a profile-level-id

Unable to create instance of encoder: FF

and the following error will be displayed while requesting a full supported profiles list

Unsupported encoder: FF

and CSV file of zero length will be created.

Known issues

1. Encoding quality settings cannot be applied if OpenH264 is used

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