I hope this is the proper forum to post this. The more relevant lists of years ago are no longer active:
https://www.linuxtv.org/lists.php I'm trying to get these Lorex SR AIS color cameras, that are supposedly capable of 1024 x 768 max and 728 x 488 NTSC, to work with a bluecherry TW-220-8 board, identified by lshw as: Intersil Techwell TW6816 multimedia video controller Rev 10. The driver (tw68): The first suspicious thing is that the board is apparently not detected by the kernel, or not identified as matching what the tw58 driver supports. Before a manual modprobe -v tw68 lshw marks all the devices as UNCLAIMED: *-multimedia:0 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4 bus info: pci@0000:03:04.0 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3201c00-e3201fff *-multimedia:1 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.1 bus info: pci@0000:03:04.1 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3201800-e3201bff *-multimedia:2 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.2 bus info: pci@0000:03:04.2 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3201400-e32017ff *-multimedia:3 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.3 bus info: pci@0000:03:04.3 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3201000-e32013ff *-multimedia:4 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.4 bus info: pci@0000:03:04.4 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202380-e32023ff *-multimedia:5 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.5 bus info: pci@0000:03:04.5 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202300-e320237f *-multimedia:6 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.6 bus info: pci@0000:03:04.6 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202280-e32022ff *-multimedia:7 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.7 bus info: pci@0000:03:04.7 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202200-e320227f *-multimedia:8 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5 bus info: pci@0000:03:05.0 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3200c00-e3200fff *-multimedia:9 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.1 bus info: pci@0000:03:05.1 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3200800-e3200bff *-multimedia:10 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.2 bus info: pci@0000:03:05.2 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3200400-e32007ff *-multimedia:11 UNCLAIMED description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.3 bus info: pci@0000:03:05.3 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3200000-e32003ff *-multimedia:12 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.4 bus info: pci@0000:03:05.4 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202180-e32021ff *-multimedia:13 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.5 bus info: pci@0000:03:05.5 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202100-e320217f *-multimedia:14 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.6 bus info: pci@0000:03:05.6 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202080-e32020ff *-multimedia:15 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.7 bus info: pci@0000:03:05.7 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202000-e320207f After a manual modprobe installation, devices /dev/video[0-7] are created crw-rw----+ 1 root video 81, 0 Jun 3 14:19 /dev/video0 crw-rw----+ 1 root video 81, 1 Jun 3 14:19 /dev/video1 crw-rw----+ 1 root video 81, 2 Jun 3 14:19 /dev/video2 crw-rw----+ 1 root video 81, 3 Jun 3 14:19 /dev/video3 crw-rw----+ 1 root video 81, 4 Jun 3 14:19 /dev/video4 crw-rw----+ 1 root video 81, 5 Jun 3 14:19 /dev/video5 crw-rw----+ 1 root video 81, 6 Jun 3 14:19 /dev/video6 crw-rw----+ 1 root video 81, 7 Jun 3 14:19 /dev/video7 and lshw now identifies the video interfaces: *-multimedia:0 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4 bus info: pci@0000:03:04.0 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:16 memory:e3201c00-e3201fff *-multimedia:1 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.1 bus info: pci@0000:03:04.1 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:16 memory:e3201800-e3201bff *-multimedia:2 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.2 bus info: pci@0000:03:04.2 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:16 memory:e3201400-e32017ff *-multimedia:3 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.3 bus info: pci@0000:03:04.3 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:16 memory:e3201000-e32013ff *-multimedia:4 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.4 bus info: pci@0000:03:04.4 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202380-e32023ff *-multimedia:5 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.5 bus info: pci@0000:03:04.5 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202300-e320237f *-multimedia:6 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.6 bus info: pci@0000:03:04.6 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202280-e32022ff *-multimedia:7 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 4.7 bus info: pci@0000:03:04.7 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202200-e320227f *-multimedia:8 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5 bus info: pci@0000:03:05.0 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:17 memory:e3200c00-e3200fff *-multimedia:9 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.1 bus info: pci@0000:03:05.1 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:17 memory:e3200800-e3200bff *-multimedia:10 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.2 bus info: pci@0000:03:05.2 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:17 memory:e3200400-e32007ff *-multimedia:11 description: Multimedia video controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.3 bus info: pci@0000:03:05.3 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=tw68 latency=32 maxlatency=72 mingnt=32 resources: irq:17 memory:e3200000-e32003ff *-multimedia:12 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.4 bus info: pci@0000:03:05.4 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202180-e32021ff *-multimedia:13 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.5 bus info: pci@0000:03:05.5 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202100-e320217f *-multimedia:14 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.6 bus info: pci@0000:03:05.6 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202080-e32020ff *-multimedia:15 UNCLAIMED description: Multimedia controller product: TW6816 multimedia video controller vendor: Intersil Techwell physical id: 5.7 bus info: pci@0000:03:05.7 version: 10 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: latency=32 maxlatency=72 mingnt=32 resources: memory:e3202000-e320207f This page: https://cateee.net/lkddb/web-lkddb/VIDEO_TW68.html seems to imply that this board is supported. I understand that only the video interfaces are supported, all the "UNCLAIMED" devices are for audio. Still, I have plugged in 4 cameras at a time in the 4 blue coax plugs, labeled VID 1-4, and the 4 green coax plugs, labeled VID 1-4. and no image shows up when running ffplay or vlc, on any of the video[0-7] interfaces. I hope it's just the lack of the proper option. Ffplay shows this, and no image. Just a black window. $ ffplay /dev/video0 ffplay version 5.1.4-0+deb12u1 Copyright (c) 2003-2023 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14) configuration: --prefix=/usr --extra-version=0+deb12u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared libavutil 57. 28.100 / 57. 28.100 libavcodec 59. 37.100 / 59. 37.100 libavformat 59. 27.100 / 59. 27.100 libavdevice 59. 7.100 / 59. 7.100 libavfilter 8. 44.100 / 8. 44.100 libswscale 6. 7.100 / 6. 7.100 libswresample 4. 7.100 / 4. 7.100 libpostproc 56. 6.100 / 56. 6.100 Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B f=0/0 Duration: N/A, start: 628.838851, bitrate: 165888 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 165888 kb/s, 25 fps, 25 tbr, 1000k tbn 700.82 M-V: -0.008 fd= 1 aq= 0KB vq= 810KB sq= 0B f=0/0 Apparently ffplay can't make sense of the video data being sent from the cameras. I Have tried this with 3 lorex cameras and one old AT&T video conferencing camera, just to make sure it's not something unique to the lorex cameras. The system load goes up in a manner consistent with processing analog/NTSC video at 25 fps. Vlc returns this error: deinterlace filter error: unknown or incompatible deinterlace mode "x" for packed format I have no idea what option I need to set or unset to correct this error . Any ideas? is there something peculiar to this board that makes it not supported by this driver? I'd be willing to help debug the driver if this is the case. I have installed the source code, but I'm hoping it's just a matter of setting the proper option. Any suggestions welcome. I would really like to be able to use all these cameras and board. Is anyone out there using this video capture card under linux? Thanks. Augustine For completeness, here's the output of lspci -v 03:04.0 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3201c00 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:04.1 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3201800 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:04.2 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3201400 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:04.3 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3201000 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:04.4 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202380 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:04.5 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202300 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:04.6 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202280 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:04.7 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Broadcom / LSI TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202200 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:05.0 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3200c00 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:05.1 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3200800 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:05.2 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3200400 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:05.3 Multimedia video controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3200000 (32-bit, non-prefetchable) [size=1K] Capabilities: [44] Power Management version 2 03:05.4 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202180 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:05.5 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202100 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:05.6 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202080 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2 03:05.7 Multimedia controller: Intersil Techwell TW6816 multimedia video controller (rev 10) Subsystem: Kolter Electronic TW6816 multimedia video controller Flags: bus master, fast Back2Back, 66MHz, medium devsel, latency 32, IRQ 9 Memory at e3202000 (32-bit, non-prefetchable) [size=128] Capabilities: [44] Power Management version 2
