Maybe you can convert the video to audio with
ffmpeg -i Spiral\ -\ 09.mkv -vn -c:a libmp3lame Spiral\ -\ 09.mp3
then grab the first frame with
ffmpeg -i Spiral\ -\ 09.mkv -vframes 1 cover.jpg
Afterwards, just use a MP3 tagging tool (like EasyTag) to put the cover image in.
Under Xenial Xerus the best choice is to use fdkaac:
sudo apt-get install fdkaac
Then the following syntax should be helpful, all examples are for Constant Bitrate Mode (CBR) although I have included a section at the bottom concerning Variable Bitrate Mode (VBR):
1. AAC-LC
For a single file try this:
fdkaac --bitrate 128k --moov-before-mdat --afterburner 1 -o output.m4a input.wav
and for a directory of wav files try the following:
mkdir aac && \
for j in *.wav
do
fdkaac --bitrate 128k --moov-before-mdat --afterburner 1 -o aac/"${j%.wav}.m4a" "$j"
done
Tested and working well on my system.
2. HE-AAC
For a single file try this:
fdkaac -p 5 --bitrate 64k --moov-before-mdat --afterburner 1 -o output.m4a input.wav
and for a directory of wav files try the following:
mkdir aac && \
for j in *.wav
do
fdkaac -p 5 --bitrate 64k --moov-before-mdat --afterburner 1 -o aac/"${j%.wav}.m4a" "$j"
done
Tested and working well on my system.
3. AAC-HEv2
For a single file try this:
fdkaac -p 29 --bitrate 32k --moov-before-mdat --afterburner 1 -o output.m4a input.wav
and for a directory of wav files try the following:
mkdir aac && \
for j in *.wav
do
fdkaac -p 29 --bitrate 32k --moov-before-mdat --afterburner 1 -o aac/"${j%.wav}.m4a" "$j"
done
Tested and working well on my system.
4. VBR Note:
If you wish to use Variable Bitrate (VBR) mode instead of Constant Bitrate (CBR) simply omit the --bitrate setting and use --bitrate-mode instead. bitrate-mode takes a setting from 1 to 5 with a higher value producing a higher bitrate.
Further Reading:
Best Answer
The version of abcde under Xenial is quite capable but some extra applications are needed as well as abcde itself:
Now to create great quality mp3s and flacs at the same time (with album art also downloaded) the following simple commandline is required:
abcde will ask you a few questions and then you can sit back while your CD is converted into 2 of the most popular audio formats today :).
Full disclosure: I was formerly one of the maintainers of abcde.