Managing Recording Format Profiles
With the addition of wideband codec support, the ISR now supports 16 KHz sampling and recording in addition to 8 KHz. To support mixed sampling rates for transmission codecs and recording formats, you can now create and manage your recording format preferences. Managing your recording format profiles also helps you choose the appropriate recording format when multiple transmission codecs are present in a session.
The Recording Format Profiles link under the Admin tab allows you to make decisions about file sizes and recording quality so you can apply them to accounts and routes.
There are five Recording Format Profiles:
- Best Quality
- Default
- Small
- Smallest
- Firefox Compatible
By clicking on a codec profile, you can edit its name, provide it a description, select a recording preference for instances where multiple transmission codecs are used in a session, and configure a recording format mapping.
You can configure a recording preference for each recording format profile. This means in cases where multiple transmission codecs are present within one raw RTP file and the codec mappings for each are not the same recording format, the ISR converts the raw RTP into a recorded file based on the profile’s size versus recording preferences setting. This is an integer value from 0-100 and in the ISR’s GUI, this is configured using a sliding bar which you can drag to your desired position between Small File Size and Best Quality. The ISR selects the recording format with the weighted size to quality ratio closest to your size versus recording preference.
When handling particular transmission codecs which do not match the bit-size or sampling rate of the recording format, the ISR performs up-sampling or down-sampling to conform the audio to the chosen destination format.
Within a recording format profile, you can also configure recording format mappings. This allows you to select a recording format for each of the four supported transmission codecs, g.711 mulaw, g.711 alaw, g.722, and g.729.
