I have been working with alsa for a while. We use it to archive content from our radio station. I am using arecord.
Build problem:
1) I cloned alsa-utils from github 2) Spent two hours on Google trying to figure out how to build the darn thing. 3) I am running Ubuntu Server 18.0 with build-essentials installed. 4) I get errors that I do not know how to fix when I try to setup ./configure. 5) I just need to make a build. What do I need to do?
Feature:
I am adding a feature. In the loop for capture(), when a new file is opened, I want to close the old file (when doing continuous recording). I added a new CLI parameter -K. When this is set, the capture() loop will close the old file before opening the new file.
This is an issue for me for two reasons:
1) When will i run out of file handles? I capture one hour files continuously. After 10 hours, I see that all the capture files are still open? 2) I need to be notified when the file is closed so that I can do post-processing of rht capture. I've tried inotifywait in a script, and in another script I tried lsof. lsof works great, but the files are open,. See, the main issue is that I need to know when each file completes so that I can post process.
Here is my post process script outline:
#!/bin/bash
for f in $HOME/vboxshare/jkirby/newarc/*.raw do filename=$(basename $f) open=$(lsof -t $f | wc -w) if [ $open -lt 1 ] then echo "$filename is closed" echo "Do post processing here" else echo "$filename is open by $open processe(s)" fi done
If I could close the file before or after the previous file is closed, I can do my work. Otherwise, I have no way to know if the file is open and being processed or not.
So, I've made the changes, I just need to build the darn thing.
Thanks for any advice or help.