The VideoLAN Forums

hello people,

some people have asked for 3gp amr support in this forum before, including me.
there fore you have built your own version of the ffmpeg-contrib package and enabling amr support there.

instructions for building with winxp/cygwin:
--------------------------------------------------

to build your amr enabled vlc, you have to

1) be sure that you can build vlc-0.8.2 sources (http://download.videolan.org/pub/videol ... .2.tar.bz2) with the precompiled contrib package (http://download.videolan.org/pub/videol ... 24.tar.bz2).
you'll find a tutorial on how to do this here: http://www.firstmiletv.nl/vlc/developers/howto.txt
building vlc-0.8.2 without errors is the prerequisite for 2)

2) get the ffmpeg-contrib package (http://download.videolan.org/pub/videol ... 24.tar.bz2) and copy it to your cygwin /home/%username% directory and extract it there with "tar -xjvf ffmpeg-20050624.tar.bz2 -C ."


next, get the amr reference codecs:
- http://www.3gpp.org/ftp/Specs/2004-03/R ... 04-520.zip
- http://www.3gpp.org/ftp/Specs/2004-03/R ... 73-530.zip
- http://www.3gpp.org/ftp/Specs/2004-03/R ... 04-540.zip

- you need to place those 3gpp files into libavcodec directory in ffmpeg source (please read "configure" file, to find out what are respective directories name). in my ffmpeg version, it should be:
- 26204-520.zip into libavcodec/amrwb_float
- 26073-530.zip into libavcodec/amr
- 26104-540.zip into libavcodec/amr_float


once u have the amr sourcecode copied to the folders in libavcodec,
you can build ffmpeg:
- in the ffmpeg directory, run "./configure --enable-mingw32 --enable-memalign-hack --extra-cflags=-I/usr/win32/include --extra-ldflags=-L/usr/win32/lib --enable-faac --enable-mp3lame --enable-pp --enable-gpl --enable-amr_nb --enable-amr_wb"

- after that run "make" in the ffmpeg directory

if make finishes without errors, go to 3)

3) if you succeeded in compiling ffmpeg on your own, you'll find "avcodec.lib" in folder "libavcodec" and "avformat.lib" in folder "libavformat".
rename these to "libavcodec.a" / "libavformat.a" and put them into /usr/win32/lib/ (which will replace libavcodec.a and libavformat.a from the precompiled contrib package)


4) again, build vlc-0.8.2 (with the new libavformat.a and libavcodec.a):

now you have a vlc, which is able to DEcode amr audio!



but unfortunately i'm not able to ENcode amr
i use ":sout=#transcode{acodec=samr,ab=8000,channels=1}:duplicate{dst=std{access=file,mux=ts,url="d:/test.3gp"}}" i get the following error:


this sux.. can anyone help?

regards, ukio

I am doing exactly as described and get this result any suggestion, Please?


gcc -Wl,--warn-common -L/usr/win32/lib -g -o ffmpeg_g.exe ffmpeg.o cmdutils.o -L./libavformat -lavformat -L./libavcodec -lav
-lz -lmp3lame -lfaac
ffmpeg.o: In function `output_packet':
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/ffmpeg.c:1262: undefined reference to `_avcodec_decode_subtitle'
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/ffmpeg.c:750: undefined reference to `_av_interleaved_write_frame'
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/ffmpeg.c:734: undefined reference to `_avcodec_encode_subtitle'
ffmpeg.o: In function `output_packet':
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/libavformat/avformat.h:55: undefined reference to `_av_destruct_packet_nofree'
ffmpeg.o: In function `output_packet':
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/ffmpeg.c:741: undefined reference to `_av_rescale_q'
/cygdrive/c/johans/realffmpeg/ffmpeg-20050624/ffmpeg.c:741: undefined reference to `_av_rescale_q'

hey,

you need to specify the audio bitrate also for AMR encoding.
try: ...acodec=samr,ab=12.2,...

it can play file with .3gf ext
but not do .amr file!
please tell me why? thanks

understood there are quite a big community using VLC, aren't there anybody around who could post ready-made executable or library of latest version for Windows?
I have no idea how to compile all this stuff from sources, but I cannot play 3gp files recorded on my mobile phone with sound.

That would be illegal. So you will not find some help here, sorry...

deep sigh.....
OK, if anybody knows something and drop me private message with relevant information - I'd be very thankful.

As the man says, it is illegal..

That said, the K-Lite Codec Pack (full) has an AMR codec for use with media player classic or windows media player.

oops, a four year necroposting.. but I still think it might be useful.

VLC can play AMR NB since version 1.1.0.

Great news. It doesn't allow use of the slider bar for the nokia amr files I am using, but the sound is fine.