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I get this error when I try to convert an wmv to 3gp using this command:

ffmpeg -y -i "inputvid.wmv" -vf scale=352:288 \
       -f 3gp -vcodec h263 -r 15 -b:v 200k \
       -acodec libvo_aacenc -ac 2 -ar 32000 -b:v 64k \
       "outputvid.3gp"

(The command is actually derived from Mobile Media Converter 1.8.2 which recently fails on each conversion and I'm trying to troubleshoot.)

I have made the latest stable ffmpeg (version 0.10.8-7:0.10.8-1~raring1) using these instruction.

I appreciate your hints to either install libvo_aacenc, or some other codec to make conversion possible.

Community
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corev
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    Possible duplicate of [WinFF (FFMPEG): Unknown encoder 'libvo\_aacenc'](https://askubuntu.com/questions/483187/winff-ffmpeg-unknown-encoder-libvo-aacenc) – llogan May 09 '18 at 19:49

4 Answers4

2

This solves it for me:

sudo apt-get install libavcodec-extra

Maybe this post has an answer, but for Googlers...

user1122069
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2

libvo_aacenc was low quality and FFmpeg removed support for this encoder.

Use -c:a aac or -c:a libfdk_aac instead.

See FFmpeg Wiki: AAC for more info.

llogan
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Ok, to make the command work, I just needed to revert the install (Reverting Changes Made by This Guide) and start again but add '--enable-libvo-aacenc' to ffmpeg .configure flags.

corev
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    If you've gone to the trouble of compiling it yourself anyway, you might as well use libfdk_aac instead, as it will give you much better quality audio. – evilsoup Sep 21 '13 at 11:18
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    Agreed. In fact, libvo_aacenc is worse than the native FFmpeg AAC encoder (`-codec:a aac -strict experimental`) which is currently being worked on and is improving. – llogan Oct 02 '13 at 20:32
  • Now `aac` is no longer experimental, so `-strict` is not needed. – llogan Jan 12 '16 at 23:48
-1

It's Easy
Only Follow the next instructions
Open the terminal
cd ~
wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
tar xjvf ffmpeg-snapshot.tar.bz2
cd ffmpeg
PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig"
export PKG_CONFIG_PATH
./configure --prefix="$HOME/ffmpeg_build" --extra-cflags="-I$HOME/ffmpeg_build/include" \ --extra-ldflags="-L$HOME/ffmpeg_build/lib" --bindir="$HOME/bin" --extra-libs="-ldl" --enable-gpl \ --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus \ --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab --enable-libvo-aacenc --enable-version3
(IN this part you have been enabled the libvo-aacenc & the version 3 of the same)
make
make install
make distclean
hash -r
Your converter is ready.

kingbeencent
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  • Looks like you copied and pasted this from the [FFmpeg Wiki](https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu) and added `--enable-libvo-aacenc --enable-version3`. – llogan Sep 27 '17 at 19:16