AMR-WB Codec

[mc4man]

Avidemux doesn't use your ffmpeg/ffmpeg libs, it uses it's own internal one. The only significant difference from what you posted and from a self built avidemux is this

Registering Internal Filters
******************************

[ADM_ad_plugin] Scanning directory /usr/lib/ADM_plugins/audioDecoder/
[ADM_ad_plugin] Plugin loaded version 0.0.1, name libADM_ad_Mad.so, desc: LibMad decoder plugin for avidemux (c) Mean

[ADM_ad_plugin] Plugin loaded version 0.0.1, name libADM_ad_vorbis.so, desc: libVorbis decoder plugin for avidemux (c) Mean

[ADM_ad_plugin] Plugin loaded version 0.0.1, name libADM_ad_faad.so, desc: Faad2 decoder plugin for avidemux (c) Mean

[ADM_ad_plugin] Plugin loaded version 1.0.0, name libADM_ad_opencore_amrnb.so, desc: opencore-amrnb decoder plugin for Avidemux (c) Mean/Gruntster

[ADM_ad_plugin] Plugin loaded version 1.0.0, name libADM_ad_opencore_amrwb.so, desc: opencore-amrwb decoder plugin for Avidemux (c) Mean/Gruntster

[ADM_ad_plugin] Plugin loaded version 0.0.1, name libADM_ad_a52.so, desc: LibAC3 decoder plugin for avidemux (c) Mean

[ADM_ad_plugin] Scanning done, found 6 codec

Note that the extent of amr support is to decode, which it will do fine, there is no encoding with amr possible

Edit; the reluctance of ubuntu to include opencore-amr support where possible (ffmpeg, avidemux, players that use libavcodec, ect. is somewhat a mystery here, will be interesting to see if that happens in 10.04

[yester64]

Avidemux doesn't use your ffmpeg/ffmpeg libs, it uses it's own internal one. The only significant difference from what you posted and from a self built avidemux is this

Thats a bummer. So essentially i can not use Avidemux to decode it.
I will try it with Live and see how it goes. That program does load audio.