tw68 fails with motion package running more than 4 cameras on 8 channel card

Hi,

This is an updated version of a posting made a couple of weeks ago after some more testing.

I am running a Motion 3.2.12 CCTV system on Lubuntu 14.04 and 15.10 with an 8 channel tw68 card. I have 6 camera attached. When I activate more that 4 threads in motion CCTV application one or more threads continually timeout. With any 4 cameras of the 6 cameras active it seems stable.

I have been running this system with 6 camera on Lubuntu 12.10 for over 3 years without a problem.

On Lubuntu 14.04 LTS

******************* apt-cache showpkg motion *******************
a
Package: motion
Versions:
3.2.12-4 (/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_trusty_universe_binary-amd64_Packages) (/var/lib/dpkg/status)
Description Language:
File:
/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_trusty_universe_binary-amd64_Packages

                  MD5: 95691a2891ad329d51433cc29defc924
 Description Language: en
                 File: 
/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_trusty_universe_i18n_Translation-en
                  MD5: 95691a2891ad329d51433cc29defc924

Reverse Depends:
motion:i386,motion
Dependencies:
3.2.12-4 - libavcodec54 (18 6:9.1-1) libavcodec-extra-54 (2 6:9.11) libavformat54 (2 6:9.1-1) libavutil52 (2 6:9.1-1) libc6 (2 2.15) libjpeg8 (2 8c) libmysqlclient18 (2 5.5.24+dfsg-1) libpq5 (0 (null)) debconf (18 0.5) debconf-2.0 (0 (null)) adduser (0 (null)) debconf (0 (null)) mysql-client (0 (null)) postgresql-client (0 (null)) ffmpeg (0 (null)) motion:i386 (0 (null)) Provides:
3.2.12-4 -
Reverse Provides:

******************* sudo modinfo tw68 *******************

filename: /lib/modules/3.19.0-49-generic/kernel/drivers/media/pci/tw68/tw68.ko
license:        GPL
author:         Hans Verkuil <[email protected]>
author:         William M. Brack
description:    v4l2 driver module for tw6800 based video capture cards
srcversion:     FB3C913977198E340B58A2E
depends: videobuf2-core,videodev,videobuf2-dma-sg,v4l2-common
intree:         Y
vermagic:       3.19.0-49-generic SMP mod_unload modversions
signer:         Magrathea: Glacier signing key
sig_key: A9:32:DC:23:78:95:A4:4D:39:59:BF:91:A3:56:6A:20:EE:21:1F:37
sig_hashalgo:   sha512
parm:           latency:pci latency timer (int)
parm:           video_nr:video device number (array of int)
parm:           card:card type (array of int)

Here are the syslog messages for motion after shutting it down with 4 threads and restarting with 5 threads

Feb 14 17:18:03 AJS2 motion: [0] httpd Closing
Feb 14 17:18:03 AJS2 motion: [0] httpd thread exit
Feb 14 17:18:04 AJS2 motion: [4] Calling vid_close() from motion_cleanup
Feb 14 17:18:04 AJS2 motion: [4] Closing video device /dev/video5
Feb 14 17:18:04 AJS2 motion: [2] Calling vid_close() from motion_cleanup
Feb 14 17:18:04 AJS2 motion: [2] Closing video device /dev/video3
Feb 14 17:18:04 AJS2 motion: [1] Calling vid_close() from motion_cleanup
Feb 14 17:18:04 AJS2 motion: [1] Closing video device /dev/video1
Feb 14 17:18:04 AJS2 motion: [3] Calling vid_close() from motion_cleanup
Feb 14 17:18:04 AJS2 motion: [3] Closing video device /dev/video4
Feb 14 17:18:05 AJS2 motion: [0] Motion terminating
Feb 14 17:18:05 AJS2 motion: [0] Removed process id file (pid file).
Feb 14 17:18:07 AJS2 motion: [0] Processing thread 0 - config file /etc/motion/motion.conf
Feb 14 17:18:07 AJS2 motion: [0] Unknown config option "destination"
Feb 14 17:18:07 AJS2 motion: [0] Processing config file /etc/motion/thread0.conf
Feb 14 17:18:07 AJS2 motion: [0] Processing config file /etc/motion/thread1.conf
Feb 14 17:18:07 AJS2 motion: [0] Processing config file /etc/motion/thread3.conf
Feb 14 17:18:07 AJS2 motion: [0] Processing config file /etc/motion/thread4.conf
Feb 14 17:18:07 AJS2 motion: [0] Processing config file /etc/motion/thread5.conf
Feb 14 17:18:07 AJS2 motion: [0] Motion 3.2.12 Started
Feb 14 17:18:07 AJS2 motion: [0] Created process id file /var/run/motion/motion.pid. Process ID is 30807
Feb 14 17:18:07 AJS2 motion: [0] Motion running as daemon process
Feb 14 17:18:07 AJS2 motion: [0] ffmpeg LIBAVCODEC_BUILD 3547904 LIBAVFORMAT_BUILD 3544067
Feb 14 17:18:07 AJS2 motion: [0] Thread 1 is from /etc/motion/thread0.conf
Feb 14 17:18:07 AJS2 motion: [0] Thread 2 is from /etc/motion/thread1.conf
Feb 14 17:18:07 AJS2 motion: [0] Thread 3 is from /etc/motion/thread3.conf
Feb 14 17:18:07 AJS2 motion: [0] Thread 4 is from /etc/motion/thread4.conf
Feb 14 17:18:07 AJS2 motion: [0] Thread 5 is from /etc/motion/thread5.conf
Feb 14 17:18:07 AJS2 motion: [1] Thread 1 started
Feb 14 17:18:07 AJS2 motion: [1] cap.driver: "tw68"
Feb 14 17:18:07 AJS2 motion: [1] cap.card: "Techwell Capture Card"
Feb 14 17:18:07 AJS2 motion: [1] cap.bus_info: "PCI:0000:02:04.0"
Feb 14 17:18:07 AJS2 motion: [1] cap.capabilities=0x85200001
Feb 14 17:18:07 AJS2 motion: [1] - VIDEO_CAPTURE
Feb 14 17:18:07 AJS2 motion: [1] - READWRITE
Feb 14 17:18:07 AJS2 motion: [1] - STREAMING
Feb 14 17:18:07 AJS2 motion: [1] Test palette UYVY (720x576)
Feb 14 17:18:07 AJS2 motion: [1] Using palette UYVY (720x576) bytesperlines 1440 sizeimage 829440 colorspace 00000001
Feb 14 17:18:07 AJS2 motion: [1] found control 0x00980900, "Brightness", range -128,127
Feb 14 17:18:07 AJS2 motion: [1] #011"Brightness", default 20, current 20
Feb 14 17:18:07 AJS2 motion: [1] found control 0x00980901, "Contrast", range 0,255
Feb 14 17:18:07 AJS2 motion: [1] #011"Contrast", default 100, current 100
Feb 14 17:18:07 AJS2 motion: [1] found control 0x00980902, "Saturation", range 0,255
Feb 14 17:18:07 AJS2 motion: [1] #011"Saturation", default 128, current 128
Feb 14 17:18:07 AJS2 motion: [1] found control 0x00980903, "Hue", range -128,127
Feb 14 17:18:07 AJS2 motion: [1] #011"Hue", default 0, current 0
Feb 14 17:18:07 AJS2 motion: [4] Thread 4 started
Feb 14 17:18:07 AJS2 motion: [5] Thread 5 started
Feb 14 17:18:07 AJS2 motion: [0] motion-httpd/3.2.12 running, accepting connections
Feb 14 17:18:07 AJS2 motion: [0] motion-httpd: waiting for data on port TCP 8888
Feb 14 17:18:07 AJS2 motion: [3] Thread 3 started
Feb 14 17:18:07 AJS2 motion: [2] Thread 2 started
Feb 14 17:18:07 AJS2 motion: [1] mmap information:
Feb 14 17:18:07 AJS2 motion: [1] frames=4
Feb 14 17:18:07 AJS2 motion: [1] 0 length=829440
Feb 14 17:18:07 AJS2 motion: [1] 1 length=829440
Feb 14 17:18:07 AJS2 motion: [1] 2 length=829440
Feb 14 17:18:07 AJS2 motion: [1] 3 length=829440
Feb 14 17:18:07 AJS2 motion: [1] Resizing pre_capture buffer to 1 items
Feb 14 17:18:07 AJS2 motion: [4] cap.driver: "tw68"
Feb 14 17:18:07 AJS2 motion: [4] cap.card: "Techwell Capture Card"
Feb 14 17:18:07 AJS2 motion: [4] cap.bus_info: "PCI:0000:02:05.0"
Feb 14 17:18:07 AJS2 motion: [4] cap.capabilities=0x85200001
Feb 14 17:18:07 AJS2 motion: [4] - VIDEO_CAPTURE
Feb 14 17:18:07 AJS2 motion: [4] - READWRITE
Feb 14 17:18:07 AJS2 motion: [4] - STREAMING
Feb 14 17:18:07 AJS2 motion: [4] Test palette UYVY (720x576)
Feb 14 17:18:07 AJS2 motion: [4] Using palette UYVY (720x576) bytesperlines 1440 sizeimage 829440 colorspace 00000001
Feb 14 17:18:07 AJS2 motion: [4] found control 0x00980900, "Brightness", range -128,127
Feb 14 17:18:07 AJS2 motion: [4] #011"Brightness", default 20, current 20
Feb 14 17:18:07 AJS2 motion: [4] found control 0x00980901, "Contrast", range 0,255
Feb 14 17:18:07 AJS2 motion: [4] #011"Contrast", default 100, current 100
Feb 14 17:18:07 AJS2 motion: [4] found control 0x00980902, "Saturation", range 0,255
Feb 14 17:18:07 AJS2 motion: [4] #011"Saturation", default 128, current 128
Feb 14 17:18:07 AJS2 motion: [4] found control 0x00980903, "Hue", range -128,127
Feb 14 17:18:07 AJS2 motion: [4] #011"Hue", default 0, current 0
Feb 14 17:18:07 AJS2 motion: [4] mmap information:
Feb 14 17:18:07 AJS2 motion: [4] frames=4
Feb 14 17:18:07 AJS2 motion: [4] 0 length=829440
Feb 14 17:18:07 AJS2 motion: [4] 1 length=829440
Feb 14 17:18:07 AJS2 motion: [4] 2 length=829440
Feb 14 17:18:07 AJS2 motion: [4] 3 length=829440
Feb 14 17:18:07 AJS2 motion: [4] Resizing pre_capture buffer to 1 items
Feb 14 17:18:07 AJS2 motion: [5] cap.driver: "tw68"
Feb 14 17:18:07 AJS2 motion: [5] cap.card: "Techwell Capture Card"
Feb 14 17:18:07 AJS2 motion: [5] cap.bus_info: "PCI:0000:02:05.1"
Feb 14 17:18:07 AJS2 motion: [5] cap.capabilities=0x85200001
Feb 14 17:18:07 AJS2 motion: [5] - VIDEO_CAPTURE
Feb 14 17:18:07 AJS2 motion: [5] - READWRITE
Feb 14 17:18:07 AJS2 motion: [5] - STREAMING
Feb 14 17:18:07 AJS2 motion: [5] Test palette UYVY (720x576)
Feb 14 17:18:07 AJS2 motion: [5] Using palette UYVY (720x576) bytesperlines 1440 sizeimage 829440 colorspace 00000001
Feb 14 17:18:07 AJS2 motion: [5] found control 0x00980900, "Brightness", range -128,127
Feb 14 17:18:07 AJS2 motion: [5] #011"Brightness", default 20, current 20
Feb 14 17:18:07 AJS2 motion: [5] found control 0x00980901, "Contrast", range 0,255
Feb 14 17:18:07 AJS2 motion: [5] #011"Contrast", default 100, current 100
Feb 14 17:18:07 AJS2 motion: [5] found control 0x00980902, "Saturation", range 0,255
Feb 14 17:18:07 AJS2 motion: [5] #011"Saturation", default 128, current 128
Feb 14 17:18:07 AJS2 motion: [5] found control 0x00980903, "Hue", range -128,127
Feb 14 17:18:07 AJS2 motion: [5] #011"Hue", default 0, current 0
Feb 14 17:18:07 AJS2 motion: [5] mmap information:
Feb 14 17:18:07 AJS2 motion: [5] frames=4
Feb 14 17:18:07 AJS2 motion: [5] 0 length=829440
Feb 14 17:18:07 AJS2 motion: [5] 1 length=829440
Feb 14 17:18:07 AJS2 motion: [5] 2 length=829440
Feb 14 17:18:07 AJS2 motion: [5] 3 length=829440
Feb 14 17:18:07 AJS2 motion: [5] Resizing pre_capture buffer to 1 items
Feb 14 17:18:07 AJS2 motion: [3] cap.driver: "tw68"
Feb 14 17:18:07 AJS2 motion: [3] cap.card: "Techwell Capture Card"
Feb 14 17:18:07 AJS2 motion: [3] cap.bus_info: "PCI:0000:02:04.3"
Feb 14 17:18:07 AJS2 motion: [3] cap.capabilities=0x85200001
Feb 14 17:18:07 AJS2 motion: [3] - VIDEO_CAPTURE
Feb 14 17:18:07 AJS2 motion: [3] - READWRITE
Feb 14 17:18:07 AJS2 motion: [3] - STREAMING
Feb 14 17:18:07 AJS2 motion: [3] Test palette UYVY (720x576)
Feb 14 17:18:07 AJS2 motion: [3] Using palette UYVY (720x576) bytesperlines 1440 sizeimage 829440 colorspace 00000001
Feb 14 17:18:07 AJS2 motion: [3] found control 0x00980900, "Brightness", range -128,127
Feb 14 17:18:07 AJS2 motion: [3] #011"Brightness", default 20, current 20
Feb 14 17:18:07 AJS2 motion: [3] found control 0x00980901, "Contrast", range 0,255
Feb 14 17:18:07 AJS2 motion: [3] #011"Contrast", default 100, current 100
Feb 14 17:18:07 AJS2 motion: [3] found control 0x00980902, "Saturation", range 0,255
Feb 14 17:18:07 AJS2 motion: [3] #011"Saturation", default 128, current 128
Feb 14 17:18:07 AJS2 motion: [3] found control 0x00980903, "Hue", range -128,127
Feb 14 17:18:07 AJS2 motion: [3] #011"Hue", default 0, current 0
Feb 14 17:18:07 AJS2 motion: [3] mmap information:
Feb 14 17:18:07 AJS2 motion: [3] frames=4
Feb 14 17:18:07 AJS2 motion: [3] 0 length=829440
Feb 14 17:18:07 AJS2 motion: [3] 1 length=829440
Feb 14 17:18:07 AJS2 motion: [3] 2 length=829440
Feb 14 17:18:07 AJS2 motion: [3] 3 length=829440
Feb 14 17:18:07 AJS2 motion: [3] Resizing pre_capture buffer to 1 items
Feb 14 17:18:07 AJS2 motion: [2] cap.driver: "tw68"
Feb 14 17:18:07 AJS2 motion: [2] cap.card: "Techwell Capture Card"
Feb 14 17:18:07 AJS2 motion: [2] cap.bus_info: "PCI:0000:02:04.1"
Feb 14 17:18:07 AJS2 motion: [2] cap.capabilities=0x85200001
Feb 14 17:18:07 AJS2 motion: [2] - VIDEO_CAPTURE
Feb 14 17:18:07 AJS2 motion: [2] - READWRITE
Feb 14 17:18:07 AJS2 motion: [2] - STREAMING
Feb 14 17:18:07 AJS2 motion: [2] Test palette UYVY (720x576)
Feb 14 17:18:07 AJS2 motion: [2] Using palette UYVY (720x576) bytesperlines 1440 sizeimage 829440 colorspace 00000001
Feb 14 17:18:07 AJS2 motion: [2] found control 0x00980900, "Brightness", range -128,127
Feb 14 17:18:07 AJS2 motion: [2] #011"Brightness", default 20, current 20
Feb 14 17:18:07 AJS2 motion: [2] found control 0x00980901, "Contrast", range 0,255
Feb 14 17:18:07 AJS2 motion: [2] #011"Contrast", default 100, current 100
Feb 14 17:18:07 AJS2 motion: [2] found control 0x00980902, "Saturation", range 0,255
Feb 14 17:18:07 AJS2 motion: [2] #011"Saturation", default 128, current 128
Feb 14 17:18:07 AJS2 motion: [2] found control 0x00980903, "Hue", range -128,127
Feb 14 17:18:07 AJS2 motion: [2] #011"Hue", default 0, current 0
Feb 14 17:18:07 AJS2 motion: [2] mmap information:
Feb 14 17:18:07 AJS2 motion: [2] frames=4
Feb 14 17:18:07 AJS2 motion: [2] 0 length=829440
Feb 14 17:18:07 AJS2 motion: [2] 1 length=829440
Feb 14 17:18:07 AJS2 motion: [2] 2 length=829440
Feb 14 17:18:07 AJS2 motion: [2] 3 length=829440
Feb 14 17:18:07 AJS2 motion: [2] Resizing pre_capture buffer to 1 items
Feb 14 17:18:07 AJS2 motion: [4] Started stream webcam server in port 8094
Feb 14 17:18:07 AJS2 motion: [4] Resizing pre_capture buffer to 21 items
Feb 14 17:18:07 AJS2 motion: [1] Started stream webcam server in port 8090
Feb 14 17:18:07 AJS2 motion: [3] Started stream webcam server in port 8093
Feb 14 17:18:07 AJS2 motion: [3] Resizing pre_capture buffer to 21 items
Feb 14 17:18:07 AJS2 motion: [1] Resizing pre_capture buffer to 21 items
Feb 14 17:18:07 AJS2 motion: [2] Started stream webcam server in port 8091
Feb 14 17:18:07 AJS2 motion: [2] Resizing pre_capture buffer to 21 items
Feb 14 17:18:07 AJS2 motion: [5] Started stream webcam server in port 8095
Feb 14 17:18:07 AJS2 motion: [5] Resizing pre_capture buffer to 21 items
Feb 14 17:18:54 AJS2 motion: [0] Thread 1 - Watchdog timeout, trying to do a graceful restart

On Lubuntu 15.10

I installed Lubuntu 15.10 on a new partition (not an upgrade) but the problem remains exactly the same.

Motion was updated to a later git version.

******************* apt-cache showpkg motion *******************

Package: motion
Versions:
3.2.12+git20140228-7 (/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_wily_universe_binary-amd64_Packages) (/var/lib/dpkg/status)
Description Language:
File:
/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_wily_universe_binary-amd64_Packages

                  MD5: 2699ebee3b63a553c62f7f823c1643ca
 Description Language: en
                 File: 
/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_wily_universe_i18n_Translation-en
                  MD5: 2699ebee3b63a553c62f7f823c1643ca

******************* sudo modinfo tw68 *******************

filename: /lib/modules/4.2.0-16-generic/kernel/drivers/media/pci/tw68/tw68.ko
license:        GPL
author:         Hans Verkuil <[email protected]>
author:         William M. Brack
description:    v4l2 driver module for tw6800 based video capture cards
srcversion:     1C0BD6DEE4DE378750B9124
depends:        videobuf2-core,videodev,videobuf2-dma-sg,v4l2-common
intree:         Y
vermagic:       4.2.0-16-generic SMP mod_unload modversions
signer:         Build time autogenerated kernel key
sig_key: 6A:1C:9C:21:F0:4A:B8:6F:D1:D7:CE:D6:CA:11:35:40:FC:8E:35:B6
sig_hashalgo:   sha512
parm:           latency:pci latency timer (int)
parm:           video_nr:video device number (array of int)
parm:           card:card type (array of int)

The 15.10 system ran with 4 cameras working fine for 24 hours. I then added the 5th and it causes one camera to fail.

Here is an extract from the motion.log when recycled

[1] [NTC] [VID] [Feb 29 19:31:37] vid_v4lx_start: Using V4L2
[1] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 1 items
[4] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream testing : IPV4 addr: 0.0.0.0 port: 8094
[4] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream Bound : IPV4 addr: 0.0.0.0 port: 8094
[4] [NTC] [ALL] [Feb 29 19:31:37] motion_init: Started motion-stream server in port 8094 auth Disabled
[4] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 21 items
[2] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream testing : IPV4 addr: 0.0.0.0 port: 8092
[2] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream Bound : IPV4 addr: 0.0.0.0 port: 8092
[2] [NTC] [ALL] [Feb 29 19:31:37] motion_init: Started motion-stream server in port 8092 auth Disabled
[2] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 3 items
[3] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream testing : IPV4 addr: 0.0.0.0 port: 8093
[3] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream Bound : IPV4 addr: 0.0.0.0 port: 8093
[3] [NTC] [ALL] [Feb 29 19:31:37] motion_init: Started motion-stream server in port 8093 auth Disabled
[3] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 21 items
[1] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream testing : IPV4 addr: 0.0.0.0 port: 8090
[1] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream Bound : IPV4 addr: 0.0.0.0 port: 8090
[1] [NTC] [ALL] [Feb 29 19:31:37] motion_init: Started motion-stream server in port 8090 auth Disabled
[1] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 21 items
[5] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream testing : IPV4 addr: 0.0.0.0 port: 8095
[5] [NTC] [STR] [Feb 29 19:31:37] http_bindsock: motion-stream Bound : IPV4 addr: 0.0.0.0 port: 8095
[5] [NTC] [ALL] [Feb 29 19:31:37] motion_init: Started motion-stream server in port 8095 auth Disabled
[5] [NTC] [ALL] [Feb 29 19:31:37] image_ring_resize: Resizing pre_capture buffer to 21 items
[0] [ERR] [ALL] [Feb 29 19:32:09] main: Thread 1 - Watchdog timeout, trying to do a graceful restart <---- failure
[2] [NTC] [EVT] [Feb 29 19:32:09] event_new_video FPS 2
[2] [NTC] [EVT] [Feb 29 19:32:09] event_newfile: File of type 8 saved to: /AJS2/AJS2_Data10/CCTV/201602/29/19/MD-2-0229-193209.avi
[2] [NTC] [ALL] [Feb 29 19:32:09] motion_detected: Motion detected - starting event 1
[0] [ERR] [ALL] [Feb 29 19:33:09] main: Thread 1 - Watchdog timeout, did NOT restart graceful,killing it!
[0] [NTC] [STR] [Feb 29 19:33:09] stream_stop: Closing motion-stream listen socket & active motion-stream sockets
[0] [NTC] [STR] [Feb 29 19:33:09] stream_stop: Closed motion-stream listen socket & active motion-stream sockets
[0] [NTC] [VID] [Feb 29 19:33:09] vid_close: Closing video device /dev/video0
[1] [ERR] [VID] [Feb 29 19:33:09] v4l2_next: VIDIOC_DQBUF: Invalid argument
[0] [NTC] [ALL] [Feb 29 19:33:10] main: Motion thread 1 restart
[1] [NTC] [ALL] [Feb 29 19:33:10] motion_init: Thread 1 started , motion detection Enabled
[1] [NTC] [VID] [Feb 29 19:33:10] vid_v4lx_start: Using videodevice /dev/video0 and input -1
[1] [NTC] [VID] [Feb 29 19:33:10] v4l2_get_capability:
------------------------

Does anyone have any suggestions?

Thanks,
Tony.

Nothing has changed in the driver code for ages, so I think it is unlikely that that is the reason.

Try to capture using qv4l2, one qv4l2 instance for each channel. If that works fine, then it is definitely not a driver/kernel issue. If that fails, then let me know and I can take a look.

Regards,

Hans