On Wed, 2021-02-03 at 12:14 -0500, Bob Goodwin wrote: > How can I put them together in one command or if there is a simpler > and better way, how to get a compressed output file from arecord? When you say compressed, do you really mean MP3, or would any compressed audio format suffice? And does it have to be arecord, or a command line tool? arecord supports .au files, which are/can be compressed files. And arecord can supposedly be used like this to create a MP3: arecord -f cd -t raw | lame -x -r – out.mp3 Or, like this to create an OGG file: arecord -f cd -t raw | oggenc – -r -o out.ogg I haven't tested either of these, I just googled: command line mp3 recording linux Those examples use a pipe to take the output from one program (the first one on the command line) and directly send it to the next one, without first saving it as a file. You should be able to combine the process you previously used over a couple of command lines to record a wav and convert to MP3, in a variety of different ways. However, MP3 encoding requires a certain amount of data to do its compression trick, so might not be as instantaneous as you think, might require a longer test recording using this method. And how are you going to stop recording? Does your command line tool cleanly stop and output a useable file when you CTRL+C it? I've only used GUI tools to record (e.g. Audacity), but I realise that's not a practical solution for everyone. When I googled: command line mp3 recording linux I see another page where they suggest this example: arecord -d 5 -f U8 sample.mp3 Which recorded 5 seconds of 8-bit MP3. But perhaps Fedora's arecord doesn't support MP3? And apparently ffmpeg can record an audio input. This page details recording to a wav https://trac.ffmpeg.org/wiki/Capture/ALSA but you ought to be able to specify any file format that ffmpeg supports. -- uname -rsvp Linux 3.10.0-1160.11.1.el7.x86_64 #1 SMP Fri Dec 18 16:34:56 UTC 2020 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
