[FFmpeg-user] decoding raw RTP?

[Amit Dor-Shifer]

Attached is a sample of mulaw-encoded audio, packeted as RTP. Is there a
way for ffmpeg to decode this?

$ ffmpeg -f rtp -acodec pcm_mulaw -i testing-123.mulaw.rtp.sample
/tmp/out.wav
ffmpeg version N-34304-gc0dbab9, Copyright (c) 2000-2011 the FFmpeg
developers
  built on Oct 31 2011 17:54:58 with gcc 4.4.5
  configuration: --disable-vaapi --enable-libtheora --enable-libvorbis
--enable-nonfree --enable-postproc --enable-version3 --enable-libspeex
  libavutil    51. 22. 0 / 51. 22. 0
  libavcodec   53. 26. 0 / 53. 26. 0
  libavformat  53. 18. 0 / 53. 18. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 45. 2 /  2. 45. 2
  libswscale    2.  1. 0 /  2.  1. 0
[rtp @ 0x1a2c8c0] Guessing on RTP content - if not received properly you
need an SDP file describing it
[rtp @ 0x1a2c8c0] Estimating duration from bitrate, this may be inaccurate
Input #0, rtp, from 'testing-123.mulaw.rtp.sample':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
Output #0, wav, to '/tmp/out.wav':
  Metadata:
    encoder         : Lavf53.18.0
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, 1
channels, s16, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0 (pcm_mulaw -> pcm_s16le)
Press [q] to stop, [?] for help
size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s
video:0kB audio:0kB global headers:0kB muxing overhead inf%

ffmpeg -f rtp -acodec pcm_mulaw -i testing-123.mulaw.rtp.sample
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