Need To Reboot Computer To Use

[pasjrwoctx]

Ok so Everytime I go to use gphoto2 so that I can stream my camera to obs, I have to reboot my computer first, and then if I stop streaming and take a break, in order to start again, I have to reboot again, other wise I get this before I have to reboot.

pasjrwoctx@philip-alienware18:~$ gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec rawvideo -pix_fmt yuv420p -threads 8 -f v4l2 /dev/video0
Capturing preview frames as movie to 'stdout'. Press Ctrl-C to abort.
ffmpeg version 5.1.2-3ubuntu1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12 (Ubuntu 12.2.0-14ubuntu2)
configuration: --prefix=/usr --extra-version=3ubuntu1 --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
[mjpeg @ 0x562572d0e380] Format mjpeg detected only with low score of 25, misdetection possible!
Input #0, mjpeg, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 640x424, 25 tbr, 1200k tbn
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> rawvideo (native))
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d37e80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d607c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d88ec0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572db15c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572dd9cc0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e02800] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e2b140] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e53c80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d37e80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e69cc0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e000c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d4de40] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d76440] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d9f8c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e45080] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e1fc40] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d37e80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e31c00] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d4f2c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d646c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e1d040] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572defd80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572da0000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e45fc0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d37e80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e31c00] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d4fa00] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572d64b00] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e1db40] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572defd80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572da1440] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x562572d29900] [swscaler @ 0x562572e475c0] deprecated pixel format used, make sure you did set range correctly
[video4linux2,v4l2 @ 0x562572d10d80] ioctl(VIDIOC_G_FMT): Invalid argument
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Conversion failed!

Here is the results from --debug --debug-logfile=debug.log

0.000082 main (2): ALWAYS INCLUDE THE FOLLOWING LINES WHEN SENDING DEBUG MESSAGES TO THE MAILING LIST:
0.000108 main (2): gphoto2 2.5.28
0.000125 main (2): gphoto2 has been compiled with the following options:
0.000128 main (2): + gcc (C compiler used)
0.000132 main (2): + popt (mandatory, for handling command-line parameters)
0.000135 main (2): + exif (for displaying EXIF information)
0.000138 main (2): + cdk (for accessing configuration options)
0.000141 main (2): + aa (for displaying live previews)
0.000144 main (2): + jpeg (for displaying live previews in JPEG format)
0.000148 main (2): + readline (for easy navigation in the shell)
0.000160 main (2): libgphoto2 2.5.30
0.000164 main (2): libgphoto2 has been compiled with the following options:
0.000167 main (2): + standard camlib set (ax203 canon digigr8 dimagev directory docupen jl2005a jl2005c kodak_dc240 lumix mars pentax ptp2 ricoh_g3 sierra sonix sq905 st2205 topfield tp6801)
0.000174 main (2): + gcc (C compiler used)
0.000177 main (2): + no ltdl (for portable loading of camlibs)
0.000180 main (2): + EXIF (for special handling of EXIF files)
0.000185 main (2): libgphoto2_port 0.12.1
0.000189 main (2): libgphoto2_port has been compiled with the following options:
0.000192 main (2): + iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi
0.000195 main (2): + gcc (C compiler used)
0.000198 main (2): + no ltdl (for portable loading of iolibs)
0.000202 main (2): + EXIF (for vusb)
0.000205 main (2): + USB (libusb1, for USB cameras)
0.000208 main (2): + serial (for serial cameras)
0.000211 main (2): + no resmgr (serial port access and locking)
0.000214 main (2): + no ttylock (serial port locking)
0.000218 main (2): + no lockdev (serial port locking)
0.000221 main (2): CAMLIBS env var not set, using compile-time default instead
0.000224 main (2): IOLIBS env var not set, using compile-time default instead
0.000228 main (2): invoked with following arguments:
0.000231 main (2): --debug
0.000235 main (2): --debug-logfile=debug.log
0.000246 load_settings (2): Creating gphoto config directory ('/home/pasjrwoctx/.gphoto')
0.000272 load_settings (2): Loading settings from file '/home/pasjrwoctx/.gphoto/settings'.
0.000349 gp_camera_free (2): Freeing camera...
0.000354 gp_port_free (2): Freeing port...
0.000370 gp_filesystem_reset (2): resetting filesystem
0.000374 gp_filesystem_lru_clear (2): Clearing fscache LRU list...
0.000377 gp_filesystem_lru_clear (2): fscache LRU list already empty
0.000381 delete_all_folders (2): Internally deleting all folders from '/'...
0.000384 lookup_folder (2): Lookup folder '/'...
0.000388 lookup_folder (2): Found! / is 0x55abf0608940
0.000391 recurse_delete_folder (2): Recurse delete folder 0x55abf0608940//
0.000395 delete_all_files (2): Delete all files in folder 0x55abf0608940//

Any help would be great, Its a real bummer and pain to have to stop everything to reboot just to us gphoto2

[pasjrwoctx]

Ok so I just found out that if I do the following,
sudo modprobe -r v4l2loopback
sudo modprobe v4l2loopback
sudo depmod -a

everything works, but I have to do that every freaking time. Any ideas why?

[msmeissn]

(depmod -a is not needed above)

Your workaround seems to show it gets stuck somewhere in the v4l2loopback driver in the kernel. Perhaps they fixed this in a newer v4l2loopback version.