Takes some time to get a test for my "FUSE camera driver" right (it's like in ~65% done til RFC) but one additional application that came to mind for it would be provide camera access for Wine ("winecamera"). So that you could use Windows applications, which require camera access.

#linux #video4linux #wine #windows

@Linux @ikkeT Mä ainakin käyttäisin appeihin ennemmin mun Mac Miniä, jos valokuvaisi. Joka alustalla kannattaisi miettiä ennemmin, missä raha tehdään kuin miten haaskataan yrityksen rahoja kaatopaikkajätteeseen.

@ikkeT @Linux Kehittäjätarinoissa ennemmin kannattaisi miettiä, että mitä jos jostain syystä joku haluaisi kehittää SaaS:n, mitä varten pitäisi hankkia 10 000 Canonin kameraa, ja niitä hyödyntävä alusta pyörisi pilvessä Kubernetesin päällä. Ei ole hirveästi mietitty, miten työ muuttuu kasvuksi, vaan tehdään jotain täysin turhaa kaikille käyttäjäkategorioille.

@ikkeT @Linux Mun mielestä tässä on ehkä ennemminkin ymmärretty mahdollisimman väärin mitä kehittäjät haluaa. Tämmöinen alustatalous toimi viimeksi 90-luvulla...

https://www.youtube.com/watch?v=-jKNrwBaCLs #finglish

Early, rudimentary and unpolished skeleton of a “server side”:

import ctypes
import fcntl
import os
import sys

V4L2_LOOPBACK_DEVICE_FILE = "/dev/v4l2loopback"

V4L2_LOOPBACK_MAGIC = 0x4C
V4L2_LOOPBACK_IOC_ADD = 0xC0004C00


class V4L2LoopbackAdd(ctypes.Structure):
    _fields_ = [
        ("card_label", ctypes.c_uint64),
        ("flags", ctypes.c_uint16),
        ("device_nr", ctypes.c_uint16),
        ("card_fd", ctypes.c_uint32),
    ]


def main():
    try:
        fd = os.open(V4L2_LOOPBACK_DEVICE_FILE, os.O_RDWR)
    except FileNotFoundError:
        sys.exit(1)

    loopback = V4L2LoopbackAdd()
    ctypes.memset(ctypes.addressof(loopback), 0, ctypes.sizeof(loopback))

    try:
        fcntl.ioctl(fd, V4L2_LOOPBACK_IOC_ADD, loopback)
        print(f"{loopback.device_nr} {loopback.card_fd}")
    except OSError:
        sys.exit(1)
    finally:
        os.close(fd)


if __name__ == "__main__":
    main()

Anyway shows the gist. The device name is due to change…

“Capture” for the next step, i.e. BuildRoot build for headless test.

wget https://file-examples.com/storage/fe3abb0cc967520c59b97f1/2018/04/file_example_AVI_640_800kB.avi
ffmpeg -stream_loop -1 -re -i file_example_AVI_640_800kB.avi -s 1280x720 -f v4l2 /dev/video0

Due to change for “/dev/video0” part (because capture device is a file descriptor eventually). Then I just need playback and comparison to get success/failure condition…

Video streamed with ffmpeg, and played with ffplay through with my WiP V4L2 loopback driver.

The next step is to detach the producer from /dev/videoX fops and instead return anonymous inode, which owns a file where the capture device can write the video stream.

The video resolution in this smoke test is 640x480, and the encoder scales it up in real-time to 1280x720.

#linux #kernel #media #video4linux

@chimbosonic @teve Feels just tragic that we've spend billions and billions to build these fast connections between computers and we still have just 2024 versions of AOL or CompuServe. No one can talk to each other in bits.

@chimbosonic @teve ya... it is sad

I mean I did regularly in 1996 e.g. /dcc send ;-) good times...

Or like wouldn't it be cool if you could just plain call your mates computer? WA or similar not required all-in-the-client...

@teve IPv6 is not really for the masses or like especially providing end user apps requiring IPv6. So not like extremely huge surprise...

I heard that recently YLE turned it on so points up for that!

Time is an ocean in a storm...
35 years ago today, Prince of Persia was released on Apple II.

A huge, heartfelt THANK YOU to all who've shared this incredible journey.❤️🙏🕹️

To see what the prince and I are up to these days, check out https://jordanmechner.com.

Itsehän myös kirjoitin tästä samasta Hesarissa pari viikkoa sitten.

X:n muutos on kuitenkin ollut nähtävissä jo kahden vuoden ajan, mutta siltä on haluttu sulkea silmät. Miltä kaikelta olisi voitu välttyä, jos globaali viestintäyhteisö olisi silloin jo tehnyt oikeat johtopäätökset?

https://www.hs.fi/mielipide/art-2000010843435.html

I like in Rust how it returns back to MS-DOS on in executables and libraries ;-)

No joke. Makes debugging so much better experience...

DSO's suck... (for most part unless they are actually needed).

#rust #rustlang

The only person I've talk to and with whom I can share my IPv6 grit has been David Woodhouse. He really gets this! I wish more PE's in big companies were like David (he works at AWS).

If you are PE of your company who has influence, be "the dwmw2" of your corps ;-)

Make a difference. In tech.

@travisfw To install full collection of currently popular linkers in Fedora:

sudo dnf install binutils-gold mold lld

This excludes wild, which needs to be installed through cargo:

cargo install --locked --bin wild --git https://github.com/davidlattimore/wild.git wild

@travisfw To install full collection of currently popular linkers in Fedora:

sudo dnf install binutils-gold mold lld

This excludes wild, which needs to be installed through cargo:

cargo install --locked --bin wild --git https://github.com/davidlattimore/wild.git wild

The only person I've talk to and with whom I can share my IPv6 grit has been David Woodhouse. He really gets this! I wish more PE's in big companies were like David (he works at AWS).

If you are PE of your company who has influence, be "the dwmw2" of your corps ;-)

Make a difference. In tech.

Think how much some IM services could scale down in service if computers could actually talk to each other.

Fuck NAT.

IPv4 Internet of today

I wonder whether 2025 will be the year of IPv6.

I miss 90s and dialup as then you could actually speak to another computer no strings attached...

In some ways Internet was more advanced in tech back then ;-)