[ffmpeg] AVI -> FLV : No mp3 audio

[stieg]

I have just installed ffmpeg for the first time on my server machine which runs Slackware 10.2. The install goes fine and everything, and I have installed it with --enable-shared.
The problem is that I can't get the output file with audio.

I know that LAME is needed to encode mp3 tracks, and I have that installed. Also that is installed with --enable-shared.

I installed ffmpeg with the following config:

./configure --enable-mp3lame --enable-shared --prefix=/usr

...and LAME with:

./configure --enable-shared --prefix=/usr

And they both worked fine.

I have tried alot of different command lines, like:
ffmpeg -i source_file.avi dest_file.flv
Gives me a correct flv file, but without the sound.

ffmpeg -i source_file.avi -acodec mp3 dest_file.flv
Returns an error saying "Unsupported codec for output stream #0.1". So my guess is that it's the mp3 lib that is messing with me.

# ffmpeg -formats returns that I have mp3 support installed:

File formats:
// a bunch of codecs info (uninteresting stuff)
 DE mp3       MPEG audio layer 3
// bla bla bla
 D A             mp3
 D A             mp3adu

Anyone have any ideas, at all?

[celtic_druid]

I would disable decoding with lame and also enable nasm.
--disable-decoder --enable-nasm

Also check your ffmpeg config log.

Assembly won't help, but it will encode faster if you get it working.

[stieg]

I would disable decoding with lame and also enable nasm.
--disable-decoder --enable-nasm

Also check your ffmpeg config log.

Assembly won't help, but it will encode faster if you get it working.

Okay thanks. Why would you want to disable decoder?

[celtic_druid]

Because apps tend to only link against lame for encoding and having decoding enabled can cause problems.