[FFmpeg-user] amr wideband

[Lucas Eckert]

Hey ffmpeg Team,

I am trying to convert a wav file to an amr wideband format. I tried 
using different encoders:

ffmpeg -i test/calibre.wav -f awb -c:a libvo_amrwbenc calibre.awb

or:

ffmpeg -i test/calibre.wav -f awb -c:a libfdk_aac calibre.awb

I also tried without the "-f awb" option.

When typing:

ffmpeg -i test/calibre.wav -c:a libvo_amrwbenc calibre.awb

I get the error:

ffmpeg version N-114151-g4700925d22 Copyright (c) 2000-2024 the FFmpeg 
developers
   built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
   configuration: --enable-libvo-amrwbenc --enable-libfdk-aac 
--enable-libgsm --enable-libmp3lame --enable-libopencore-amrwb 
--enable-libopencore-amrnb --enable-version3
   libavutil      59.  1.100 / 59.  1.100
   libavcodec     61.  1.101 / 61.  1.101
   libavformat    61.  0.100 / 61.  0.100
   libavdevice    61.  0.100 / 61.  0.100
   libavfilter    10.  0.100 / 10.  0.100
   libswscale      8.  0.100 /  8.  0.100
   libswresample   5.  0.100 /  5.  0.100
[aist#0:0/pcm_s16le @ 0x5647e88f1a40] Guessed Channel Layout: stereo
Input #0, wav, from 'test/calibre.wav':
   Metadata:
     title           : Calibre - Feeling Normal - 03 Time To Breathe 
(with Cimone)
     NITR            : NTKB?y
   Duration: 00:05:50.50, bitrate: 1411 kb/s
   Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 
stereo, s16, 1411 kb/s
[AVFormatContext @ 0x5647e8933d00] Unable to choose an output format for 
'calibre.awb'; use a standard extension for the filename or specify the 
format manually.
[out#0 @ 0x5647e8933bc0] Error initializing the muxer for calibre.awb: 
Invalid argument
Error opening output file calibre.awb.
Error opening output files: Invalid argument

When I look for the "ffmpeg -encoders" available it says, that they 
should be availabe:

A....D libopencore_amrnb    OpenCORE AMR-NB (Adaptive Multi-Rate 
Narrow-Band) (codec amr_nb)
  A....D libvo_amrwbenc       Android VisualOn AMR-WB (Adaptive 
Multi-Rate Wide-Band) (codec amr_wb)

I hope you can help me with that.

Best regards
Ecki