We're trying to recompile ffmpeg project using javacpp and with the --enable-libfdk-aac enabled, the build works, but we can't use libfdk_aac to decode an audio_stream.
We are calling : avcodec_find_decoder_by_name("libfdk_aac") and getting the following result:
Exception: avcodec_find_decoder() error: Unsupported audio format or codec not found: 86018.
We've modified the ccpbuild.sh in the ffmpeg directory in the following way:
Adding the instruction: --enable-libfdk-aac in the ENABLE variable
Getting the dependency : download https://github.com/mstorsjo/fdk-aac/tarball/master fdk-aac.tar.gz
Unpacking it: tar -xzvf ../fdk-aac.tar.gz
Installing it:
cd ../mstorsjo-fdk-aac*
autoreconf -fiv
./configure --prefix=$INSTALL_PATH --disable-shared --with-pic
make -j $MAKEJ
make install
I'm running all this on a macosx platform.
The process seems to be ok, and I can compile the project properly with maven, but then it does not work when I'm calling the codec "libfdk_aac". I was wondering if I'm doing something wrong, or is there any other place where I need to register this codec ? (especially since this is an external library)
Many Thanks
In the end there are not any issue with the javacpp presets for ffmpeg. The way we added libfdk in the preset (as I described it in my question post), was correct.
However in the FFmpegFrameGrabber class in Javacv, we were missing a method to "force" an audio codec when decoding the media. We've modified this class to add a setAudioCodecName method and this is now working properly. We can then set libfdk_aac (or any other codec) to decode audio, or encode audio with it using the FFmpegFrameRecorder.