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Failed to open /dev/video0 using hauppauge PVR250
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Author:  graysky [ Sun Aug 05, 2018 12:33 pm ]
Post subject:  Failed to open /dev/video0 using hauppauge PVR250

Firstly, I am not running LH, just a plain Arch Linux box. My goal is to use an old PVR-250 card and an old VCR to digitize some very old VHS content as I did when I was running LH. I'd like to do it using my existing Arch install, but if the hardware is supported under LH, I can probably scare up an old HDD and put LH on it.

What I did on Arch: installed v4l-utils and, from the AUR, ivtv-utils (which seems to supply the needed firmware) but the kernel seems unable to initialize the card:

# dmesg | grep -i 'video\|ivtv'
[    0.234056] ACPI: Added _OSI(Linux-Dell-Video)
[    0.288644] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[    2.430862] Linux video capture interface: v2.00
[    2.465557] ivtv: Start initialization, version 1.4.3
[    2.465588] ivtv0: Initializing card 0
[    2.465590] ivtv0: Autodetected Hauppauge card (cx23416 based)
[    2.465877] ivtv0: Cannot request encoder memory region.
[    2.465914] ivtv0: Error -5 on initialization
[    2.465935] ivtv: probe of 0000:06:00.0 failed with error -5
[    2.465948] ivtv: End initialization
[    2.720489] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[    2.720597] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5

Unsurprising given the age of the hardware, googling on the errors gave outdated advice. Does anyone have some expertise with this type of hardware?

In the past, when I had this working under LH, I could simply have an old VCR hooked up via coax cable, and could digitize the content like this:
% v4l2-ctl --set-input=5
% cat /dev/video0 >capture.mpg

Since the hardware is not initialized, it's no surprise that a simple query errors out:
# v4l2-ctl --all
Failed to open /dev/video0: No such file or directory

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