problem with ffmpeg

[kamill2010]

Hello

I have a problem with Strem film by ffmpeg 3.0 please help

ffmpeg -f concat -i 001.txt -strict experimental -acodec ac3 -c copy -f flv rtmp://xxx/live/XXX

[flv @ 0x3ce50a0] Audio codec ac3 not compatible with flv
Output #0, flv, to 'rtmp://xxx/live/XXX':
  Metadata:
    encoder         : Lavf57.25.100
    Stream #0:0: Video: mpeg4 ([9][0][0][0] / 0x0009), yuv420p, 1280x536 [SAR 1:1 DAR 160:67], q=2-31, 3599 kb/s, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, 192 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented
./1.sh: line 2: 1=1: command not found
ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (Debian 4.7.2-5)
  configuration: 
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libswscale      4.  0.100 /  4.  0.100