transcode-audio

README

Transcode audio

derived from transcode_aac.c from ffmpeg example https://git.ffmpeg.org/gitweb/ffmpeg.git/blob_plain/HEAD:/doc/examples/transcode_aac.c

How to build

Install ffmpeg developer libraries. If Ubuntu 20.04,

sudo apt install -y libavdevice-dev libavfilter-dev libswscale-dev libavcodec-dev libavformat-dev libswresample-dev libavutil-dev

Otherwise, you have to build ffmpeg 4.2 or newer. Build with configure --enable-shared.

Resolve dependency

go get .

Build

go build

I tested on Ubuntu 18.04 on x86_64, Ubuntu 18.04 on arm64(jetson nano) and Raspbian on Raspberry Pi 2.

How to use

./transcode-audio <input_audio_file> <output_audio_file>

For example

./transcode-audio test001.opus out.mp4

Audio CODEC is hard-coded to AAC. If you want to transcode other than AAC, Change this line of transcode-audio.go

	outputCodec := avcodec.AvcodecFindEncoder(avcodec.CodecId(avcodec.AV_CODEC_ID_AAC))

Enjoy.