On 2/17/22 10:39, Rich Shepard wrote > Where do I look for codec mp3 and how do I put it where it should be for > ffmpeg to find? Or, is there another tool I can use to extract the audio > stream from an .mp4 I created so I can test my sound system with a file I > know has recorded audio? > > Rich >
In Slackware 14.2 you need to install lame from Slackbuilds.org https://slackbuilds.org/repository/14.2/libraries/lame/ then get ffmpeg from same https://slackbuilds.org/repository/14.2/multimedia/ffmpeg/ and adjust the buildscript for any codex you need to have included. Everything not in the base Slackware is <codec>=no by default. Thus, install the needed codecs, then either edit the buildscript or # LAME=yes ... sh ffmpeg.SlackBuilds See README. Don't forget your mp4 video codecs. In Slackware-15.0 ffmpeg is compiled with lame (mp3). -Ed
