dx9s.net

A home for dx9s in the interwebs

Not that I used this recently, but saw an article on some commands that thought would be good to document here:

Most the examples don't list basic file globing for input... so here it is:

$ ffmpeg -pattern_type glob -i '*.png' -c:v libvpx-vp9 -pix_fmt yuva420p output.webm

When new enough ffmpeg can do vp8 with transparency that is backwards compatible with decoders that DON'T support alpha channel:

$ ffmpeg -pattern_type glob -i '*.png' -c:v libvpx -pix_fmt yuva420p -metadata:s:v:0 alpha_mode="1" output.webm

Most examples show something like this:

$ ffmpeg -framerate 25 -f image2 -i frames/%03d.png -c:v libvpx -pix_fmt yuva420p output.webm

I should have documented this (and other useful tools which I can't remember at this time) earlier:

/etc/udev/rules.d/99-CHProducts.rules:
KERNEL=="event*", ATTRS{idProduct}=="00f2", ATTRS{idVendor}=="068e", MODE="0666"
KERNEL=="event*", ATTRS{idProduct}=="00f3", ATTRS{idVendor}=="068e", MODE="0666"

There are some ways to scan input devices .. some "jstest" and another way -- can't remember because it would come in handy with previous post about NX6000D HID interface:

Specialty HID devices and Wine

https://stackoverflow.com/questions/873975/how-to-capture-raw-hid-input-...

The USB device is simply a HID device and the windows only binary runs but can't communicate with the hardware. The URL above provides several points to review.

(Recently purchased Behringer NX6000D (to replace Peavey CS1000X) -- Lighter and less power, but will work.)

Trying to do/make a pulseaudio profile for multichannel sound cards so they don't "look" like a surround card in the channel names..
(also see here on why surround channel names suck when creating custom pulseaudio scripts)

Trying to understand this page: https://www.freedesktop.org/wiki/Software/PulseAudio/Backends/ALSA/Profi...

OKAY .. found documentation on writing pulseaudio profile sets:

https://www.freedesktop.org/wiki/Software/PulseAudio/Backends/ALSA/Profi...

Want to do this for USB X32 and XR18 hardware.

I expect to be writing a UDEV rule and placing it somewhere (not sure where) and some configuration file someplace (not sure of location)...

A wonderful person that has been maintaining "unofficial" scripts to create DEB installers for DaVinci Resolve on Ubuntu:

http://www.danieltufvesson.com/makeresolvedeb

Here is good resource on filename globbing for input files in ffmpeg:

https://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/image_sequence

Came across this link: http://blog.lfnw.org/2019/03/25/closing-individual-sponsorship.html

Had to verify my suspections:

Resources here provide good examples if you want to combined certain devices and not all of them (like using paprefs):

Not sure why, but there seems to be a lot of issues with gnome and app indicators (think system tray)..

So far this seems to work, but as it is a bit of voodoo, haven't tested it often.. (or at least some combination involving the following):

$ sudo apt purge gnome-shell-extension-appindicator indicator-common indicator-application

reboot / Alt-F2 'r'

gnome-tweaks -> extensions. make sure everything is disabled

reboot / Alt-F2 'r'

Ubuntu Software -> Add-Ons -> Shell Extensions -> Topicons plus (install)

reboot /Alt-F2 'r'

/etc/udev/rules.d$ cat 99-CHProducts.rules
KERNEL=="event*", ATTRS{idProduct}=="00f2", ATTRS{idVendor}=="068e", MODE="0666"
KERNEL=="event*", ATTRS{idProduct}=="00f3", ATTRS{idVendor}=="068e", MODE="0666"