Question

I need to extract the audio from a FLV file recorded using FMS. I used the SPEEX coded in my flash application that streams the audio and video to FMS.

I have tried using FFMPEG, with no luck. This is the -i outputs of my FLV:

FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
configuration: –enable-gpl –enable-pp –enable-swscaler –enable-pthreads –enable-libvorbis –enable-libtheora –enable-libogg –enable-libgsm –enable-dc1394 –disable-debug –enable-shared –prefix=/usr
libavutil version: 1d.49.3.0
libavcodec version: 1d.51.38.0
libavformat version: 1d.51.10.0
built on Apr 23 2010 15:11:13, gcc: 4.2.4 (Ubuntu 4.2.4-1ubuntu3)
[flv @ 0xb7ed7110]Unsupported audio codec (b)
[flv @ 0xb7ed7110]Unsupported audio codec (b)
Input #0, flv, from ‘m.flv’:
Duration: 00:00:05.0, start: 0.000000, bitrate: N/A
Stream #0.0: Video: flv, yuv420p, 288×203, 1000.00 fps(r)
Stream #0.1: Audio: 0x000b, 11025 Hz, mono

I need a command line utility, since this will be executed from a server.

Thanks in advance.

Answer 1

Typical flv:

flv @ 0x152ba80]Estimating duration
from bitrate, this may be inaccurate
[lavf] stream 0: video (flv), -vid 0
[lavf] stream 1: audio (mp3), -aid 0
VIDEO: [FLV1] 320×240 0bpp 25.000
fps 250.3 kbps (30.6 kbyte/s)

To read this, ffmpeg must be compiled with additional options:

  --enable-gpl --enable-nonfree --enable-libmp3lame 

Then,

ffmpeg -i flvfile 1.mp3