Amr_nb - ffmpeg, Amr-nb, 9 amr_nb - ffmpeg – Google Flix Engine Linux Reference Manual User Manual
Page 36: 1 detailed description, Defines
30
Flix Engine Linux Module Documentation
5.9
AMR_NB - FFmpeg
5.9.1
Detailed Description
AMR narrowband encoder.
Valid bitrates:
AMR narrowband only supports a fixed set of bitrates:
codec mode | kbps
===================
MR475
| 4.75
MR515
| 5.15
MR59
| 5.90
MR67
| 6.70
MR74
| 7.40
MR795
| 7.95
MR102
| 10.2
MR122
| 12.2
will be adjusted as follows, if necessary:
FE2_AMR_BITRATE = 0.0
<= FE2_AMR_BITRATE <
5.0,
MR475
5.0
<= FE2_AMR_BITRATE <
5.9,
MR515
5.9
<= FE2_AMR_BITRATE <
6.7,
MR59
6.7
<= FE2_AMR_BITRATE <= 7.0,
MR67
7.0
<
FE2_AMR_BITRATE <
7.95, MR74
7.95 <= FE2_AMR_BITRATE <
10.0, MR795
10.0 <= FE2_AMR_BITRATE <
12.0, MR102
12.0 <= FE2_AMR_BITRATE,
MR122
Attention:
In addition to the bitrate restrictions above, the sample rate MUST be 8000Hz and the number of
channels MUST be 1.
See also:
Example Usage:
sc = Flix2_AddCodec(&codec, flix, FE2_CODEC_AMR_NB);
// Use 12.2kbps
if(sc == ON2_OK)
sc = Flix2_CodecSetParam(codec, FE2_AMR_BITRATE, 12.2);
Additional References:
•
•
•
Defines
• #define
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