https://buredoranna.github.io/linux/ext4/2020/01/09/ext4-viz...
Linux never had a good one to my knowledge. Improved filesystems reduced the need and then SSDs delivered the deathblow.
But I feel like the visualization was useful in itself to see what was happening on the storage device and unfortunately forgotten due to those improvements.
Even Windows XP had a graphical representation of the disk contents, and it animated during defrag.
As for _visualizing_ the audio as video, no, that was never possible w/o writing code. =) And to do it _well_, you need to do some math as well. I say this because I wrote that code in 2001, 2003, then again in 2008, then again later... it's a ... hobby of mine :)
For ext4, I recently saw a patch set on the mailing list[4].
Not sure about other filesystems tough.
[1] https://manpages.debian.org/unstable/squashfs-tools-ng/tar2s...
[2] https://manpages.debian.org/unstable/squashfs-tools-ng/sqfs2...
[3] https://manpages.debian.org/unstable/squashfs-tools/sqfstar....
[4] https://lore.kernel.org/linux-ext4/20230812150204.462962-2-j...
Unfortunately, mkfs.ext4 only works on Linux. There is no port for other operating systems.
[0] https://github.com/cedws/concrete-ubuntu/blob/0ae3f076c5a20d...
On Alpine Linux:
```
apk add --no-cache coreutils e2fsprogs
```
```
#!/bin/sh
# Untar the tar file
mkdir -p /tmp/my_untarred_files_dir
tar -xvf my_tar_file.tar -C /tmp/my_untarred_files_dir
# Make an empty image file.
dd if=/dev/zero of="fs.raw" bs=1M count=1024
# Format the file as ext4 (with journaling) and copy untarred files into it
mke2fs -t ext4 -j -d "/tmp/my_untarred_files_dir" "fs.raw"
```
If you want to make a qcow2 image, you can then do this:
```
apk add --no-cache qemu-img
qemu-img convert -O qcow2 "fs.raw" "fs.qcow2"
```
$ 7z l <image>
$ 7z x <image>
