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Hello ,


I am struggling for 1 week till now to enable the vlc encoding with amr and I find the process still like pain in the ass!
I have read hundreds of post in the forums how i should enable it, but after doing and testing almost everything, i still cant!

i have ffmpeg (cvs version from today) compiled with --enable-shared --enable-mp3lame --enable-gpl --enable-faad --mandir=/share/man --enable-vorbis --enable-pthreads --enable-faac --enable-xvid --enable-dts --enable-amr_nb --enable-amr_wb --enable-pp --enable-libogg --enable-a52 --enable-theora --enable-libgsm --enable-x264 --enable-a52bin

after that i exported PKG_CONFIG_PATH to /root/src/ffmpeg/ and compiled the vlc (cvs from today too) with
--enable-v4l --with-ffmpeg-amr_nb --disable-mad --disable-wxwidgets --disable-skins2

i am not sure about the --with-ffmpeg-amr_nb option, but i have seen it in one post in the forum and i included it. it never hurts

i am starting the program with the long
./vlc --color v4l:/dev/video0:norm=pal:frequency=175250:channel=0:adev=/dev/dsp:audio=0 --sout '#transcode{vcodec=H263,vb=32,width=128,height=96,acodec=samr}:rtp{dst=127.0.0.1,port-video=22000, ttl=127, sdp="file:///usr/local/movies/hhh.sdp"}' -vvvv


and I get the disappointing

[00000289] ffmpeg encoder debug: found encoder H263
[00000289] main encoder debug: using encoder module "ffmpeg"
[00000289] main encoder debug: removing module "ffmpeg"
[00000254] stream_out_transcode private debug: creating audio transcoding from fcc=`s16l' to fcc=`samr'
[00000303] main decoder debug: looking for decoder module: 19 candidates
[00000303] araw decoder debug: samplerate:44100Hz channels:2 bits/sample:16
[00000303] main decoder debug: using decoder module "araw"
[00000304] main encoder debug: looking for encoder module: 5 candidates
[00000304] ffmpeg encoder debug: libavcodec already initialized
[00000304] ffmpeg encoder error: cannot open encoder
[00000254] stream_out_transcode private error: cannot find encoder
[00000303] main decoder debug: removing module "araw"
[00000254] stream_out_transcode private error: cannot create audio chain
[00000270] main packetizer error: cannot create packetizer output (s16l)

and the output sdp is without audio

debilian:~# cat /usr/local/movies/hhh.sdp
v=0
o=- 1143398713930775 1 IN IP4 127.0.0.1
s=NONE
t=0 0
a=tool:vlc 0.8.5-test1
c=IN IP4 127.0.0.1
m=video 22000 RTP/AVP 96
a=rtpmap:96 H263-1998/90000



i have checked that the ld is using the right libavcodec libs from my newly compiled ffmpeg (ldconfig -p)


i see that H263 codec is working and it is transcoded by the ffmpeg. in the ffmpeg -formats it is written that the amr_nb is supported (decode, encode) by it.
So how to make vlc use properly ffmpeg for amr transcoding?
Where can I find what codecs are supported by the vlc using ffmpeg ?
And how can I change the H263-1998 version to plain h263?

Wow, this post came longer than expected

It can help you! You have set all parameters for AMR codec.
But U'll have another problem! Read here: viewtopic.php?t=17402

yeah, i have read this post, but the problem is that i have no voice, not bad quality voice. it tells me that i don't have this codec. How did you succeed in compiling it with it ?

Did You do this during ffmpeg's installation process:

AMR WB FLOAT NOTICE ! Make sure you have downloaded TS26.204 V5.1.0 from
http://www.3gpp.org/ftp/Specs/archive/2 ... 04-510.zip
and extracted the source to libavcodec/amrwb_float


AMR NB FLOAT NOTICE ! Make sure you have downloaded TS26.104 REL-5 V5.1.0 from
http://www.3gpp.org/ftp/Specs/latest/Re ... 04-5??.zip
and extracted the source to libavcodec/amr_float
and if u try this on an alpha, u may need to change Word32 to int in amr/typedef.h

Be sure that the source of amr codecs is in libavcodec directory!

Of course and even i had a little problems with compiling the amr directory, but i saw what is written in amr.c in the libavcodec directory. the ffmpeg is ok, because i can make amr encoded files with it

Strange...
This problem occurted when I didn't specify all transcoding parameters
Like But it works now!...
Can you show me your log with enabled this parameters?

ok, with this one it finds the amr nb codec, but
./vlc --color v4l:/dev/video0:norm=pal:frequency=175250:channel=0:adev=/dev/dsp:audio=0 --sout '#transcode{vcodec=H263,vb=32,width=128,height=96,acodec="samr",ab="12.2",samplerate="8000",channels="1"}:rtp{dst=127.0.0.1,port-video=22000,port-audio="22002", ttl=127, sdp="file:///usr/local/movies/hhh.sdp"}' -vvvv

i get another error:
[00000308] ffmpeg encoder debug: found encoder AMR narrow band
.
.
.
[00000254] stream_out_transcode private error: no audio filter found for mixing from 2 to 1 channels
[00000307] main decoder debug: removing module "araw"
[00000308] main encoder debug: removing module "ffmpeg"
[00000309] main private debug: removing module "audio_format"
[00000317] main private debug: removing module "linear_resampler"
[00000318] main private debug: removing module "audio_format"
[00000254] stream_out_transcode private error: cannot create audio chain
[00000270] main packetizer error: cannot create packetizer output (s16l)


any ideas ?

Ouch!
I have this problem too... All what I know, that if I install newer version of VLC this problem was gone. How? I don't know...

newer ? which one ? i am installing vlc-trunk, which is CVS version and it is the latest

I have no this problem in VLC version tarball-20060128.

ok, sposibo bolshoe.
i will try with it and write the result

Good Luck

Beating my head into the wall with the same issue, I've recompiled VLC a hundred different ways and still cannot get it done.

It's always the same issue, the samr codec cannot be found.

ffmpeg is most definitely properly compiled with amr/nb support.

Would anyone be a kind soul and wrap it all up in an rpm

I think that all troubles - in input parameters of VLC-encoder's!

Would anyone be a kind soul and wrap it all up in an rpm

My system - is Debian x86_64, I have all libs and ffmpeg(amr'ed)+VLC, but i can't create .rpm or .deb files. (i don't know howto do it).
I can share my /usr/local directory.

He!

No need to wrap anymore - I got it working. (I'm the guest from the earlier post )

Now to get AAC+ working with Darwin and Nokia cells..

He!

No need to wrap anymore - I got it working. (I'm the guest from the earlier post )

Now to get AAC+ working with Darwin and Nokia cells..

Can you describe us how??

hey,

how did you get rid of the
"no audio filter found for mixing from 2 to 1 channels" -error?

i'm struggling with the same issue ...

Mait

how did you get rid of the
"no audio filter found for mixing from 2 to 1 channels" -error?

Try another versions of VLC and ffmpeg

He!

No need to wrap anymore - I got it working. (I'm the guest from the earlier post )

Now to get AAC+ working with Darwin and Nokia cells..

Can you describe us how??

http://ficken.dyndns.dk/

Hi, I'm get error with AMR with VLC

I build ffmpeg-cvs20060303 with AMR support and it's success if encode with AMR codec.

I want to stream H263 and AMR to my network with VLC but there is following error :

[00000285] stream_out_transcode private debug: creating audio transcoding from fcc=`s16l' to fcc=`samr'
[00000342] main decoder debug: looking for decoder module: 22 candidates
[00000342] araw decoder debug: samplerate:32000Hz channels:2 bits/sample:16
[00000342] main decoder debug: using decoder module "araw"
[00000343] main encoder debug: looking for encoder module: 9 candidates
[00000343] ffmpeg encoder debug: libavcodec already initialized
[00000343] ffmpeg encoder debug: found encoder AMR narrow band
[00000343] main encoder debug: using encoder module "ffmpeg"
[00000344] main private debug: looking for audio filter2 module: 5 candidates
[00000344] audio_format private debug: s16l->fl32, bits per sample: 16
[00000344] main private debug: using audio filter2 module "audio_format"
[00000350] main private debug: looking for audio filter2 module: 5 candidates
[00000350] linear_resampler private debug: fl32/32000KHz/2->s16l/8000KHz/1
[00000350] main private debug: using audio filter2 module "linear_resampler"
[00000351] main private debug: looking for audio filter2 module: 5 candidates
[00000351] audio_format private debug: fl32->s16l, bits per sample: 32
[00000351] main private debug: using audio filter2 module "audio_format"
[00000352] main private debug: looking for audio filter2 module: 5 candidates
[00000343] main encoder debug: removing module "ffmpeg"
[00000285] stream_out_transcode private debug: number of audio channels for mixing changed, trying to reopen the encoder for mixing 2 to 2 channels
[00000343] main encoder debug: looking for encoder module: 9 candidates
[00000343] ffmpeg encoder debug: libavcodec already initialized
[00000343] ffmpeg encoder error: cannot open encoder
[00000285] stream_out_transcode private error: cannot find encoder ((null))
[00000342] main decoder debug: removing module "araw"
[00000344] main private debug: removing module "audio_format"
[00000350] main private debug: removing module "linear_resampler"
[00000351] main private debug: removing module "audio_format"
[00000285] stream_out_transcode private error: cannot create audio chain
[00000308] main packetizer error: cannot create packetizer output (s16l)

I use VLC-0.8.6 and compiled ffmpeg with AMR support. If I use ffmpeg only to encode AMR, it's success with nice audio. But when I want to stream there is an error.
In that error log, there is found AMR codec but then vlc cannot open the encoder.

My vlc command (from VLC Wiki):
transcode{vcodec=H263,width=128,height=96,vb=28,fps="12.5",acodec=samr,ab="5.25",samplerate=8000,
channels=1,venc=ffmpeg{keyint=6,strict=1,strict-rc=1}}:rtp{mp4a-latm,port-video=2244,port-audio=2242,dst=1
27.0.0.1,ttl=12,sdp=rtsp://10.14.200.244:8090/test.sdp}

If I use another codec, like mp3, there is no error and success.
Any one, please tell me how to solve this problem..
Thanks

You have 2 channels audio as input? there some troubles while transcoding from 2 channels to 1 ch.

Try to transcode one channel audio.