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ffmpeg how to encode first then use it for another output
10 août 2017, par mahdi ghI’m trying to capture screen with gdigrab and combine int with a sound and then send it on my decklink sdi device.
here is my code to capture :
ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i title="Play" -f dshow -i audio="CABLE Output (VB-Audio Virtual Cable)" -af aresample=resampler=soxr -ar 48000 -acodec pcm_s16le -ac 2 -c:v libx264 -qp 0 -preset ultrafast "output.avi"
here is my code for output to ffmpeg :
ffmpeg -i output.avi -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)"
this way it works, but when I combine these two arguments to send the output to decklink card on the fly, ffmpeg stops working. here is the combination code :
ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i title="Play" -f dshow -i audio="CABLE Output (VB-Audio Virtual Cable)" -af aresample=resampler=soxr -ar 48000 -acodec pcm_s16le -ac 2 -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)"
I have tried so many different combinations but no luck. it works only if i store it on a file then use that file as input. Is there a way to tell ffmpeg to use the result of first command as input of second command ?
Thanks
Update :
Here is log report :ffmpeg started on 2017-08-08 at 12:26:36
Report written to "ffmpeg-20170808-122636.log"
Command line:
ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i "title=Play" -c:v rawvideo -f dshow -i "audio=CABLE Output (VB-Audio Virtual Cable)" -af "aresample=resampler=soxr" -ar 48000 -acodec pcm_s16le -ac 2 -map 0:v:0 -map 1:a:0 -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)" -report
ffmpeg version N-71608-ga924b83 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 23.101 / 54. 23.101
libavcodec 56. 35.101 / 56. 35.101
libavformat 56. 30.100 / 56. 30.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 14.100 / 5. 14.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Splitting the commandline.
Reading option '-framerate' ... matched as AVOption 'framerate' with argument '25'.
Reading option '-thread_queue_size' ... matched as option 'thread_queue_size' (set the maximum number of queued packets from the demuxer) with argument '512'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'gdigrab'.
Reading option '-i' ... matched as input file with argument 'title=Play'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'rawvideo'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
Reading option '-i' ... matched as input file with argument 'audio=CABLE Output (VB-Audio Virtual Cable)'.
Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'aresample=resampler=soxr'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '48000'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'pcm_s16le'.
Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '2'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:v:0'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '1:a:0'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'decklink'.
Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'uyvy422'.
Reading option 'DeckLink SDI (2)' ... matched as output file.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file title=Play.
Applying option thread_queue_size (set the maximum number of queued packets from the demuxer) with argument 512.
Applying option f (force format) with argument gdigrab.
Successfully parsed a group of options.
Opening an input file: title=Play.
[gdigrab @ 0000000002d3f2a0] Found window Play, capturing 720x576x32 at (0,0)
[gdigrab @ 0000000002d3f2a0] Cursor pos (588,602) -> (-271,597)
[gdigrab @ 0000000002d3f2a0] All info found
Input #0, gdigrab, from 'title=Play':
Duration: N/A, start: 1502178996.958615, bitrate: 331786 kb/s
Stream #0:0, 1, 1/1000000: Video: bmp, bgra, 720x576, 331786 kb/s, 25 tbr, 1000k tbn, 25 tbc
Successfully opened the file.
Parsing a group of options: input file audio=CABLE Output (VB-Audio Virtual Cable).
Applying option c:v (codec name) with argument rawvideo.
Applying option f (force format) with argument dshow.
Successfully parsed a group of options.
Opening an input file: audio=CABLE Output (VB-Audio Virtual Cable).
[dshow @ 0000000002d3c340] Selecting pin Capture on audio only
dshow passing through packet of type audio size 88200 timestamp 111632750000 orig timestamp 111632750000
[dshow @ 0000000002d3c340] All info found
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, dshow, from 'audio=CABLE Output (VB-Audio Virtual Cable)':
Duration: N/A, start: 11163.275000, bitrate: 1411 kb/s
Stream #1:0, 1, 1/10000000: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
Successfully opened the file.
Parsing a group of options: output file DeckLink SDI (2).
Applying option af (set audio filters) with argument aresample=resampler=soxr.
Applying option ar (set audio sampling rate (in Hz)) with argument 48000.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument pcm_s16le.
Applying option ac (set number of audio channels) with argument 2.
Applying option map (set input stream mapping) with argument 0:v:0.
Applying option map (set input stream mapping) with argument 1:a:0.
Applying option f (force format) with argument decklink.
Applying option pix_fmt (set pixel format) with argument uyvy422.
Successfully parsed a group of options.
Opening an output file: DeckLink SDI (2).
Successfully opened the file.
detected 2 logical cores
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'video_size' to value '720x576'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'pix_fmt' to value '30'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'time_base' to value '1/1000000'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'frame_rate' to value '25/1'
[graph 0 input from stream 0:0 @ 0000000002dd7ea0] w:720 h:576 pixfmt:bgra tb:1/1000000 fr:25/1 sar:0/1 sws_param:flags=2
[format @ 0000000002d3df00] compat: called with args=[uyvy422]
[format @ 0000000002d3df00] Setting 'pix_fmts' to value 'uyvy422'
[auto-inserted scaler 0 @ 0000000002d44ca0] Setting 'flags' to value '0x4'
[auto-inserted scaler 0 @ 0000000002d44ca0] w:iw h:ih flags:'0x4' interl:0
[format @ 0000000002d3df00] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 0000000002e586c0] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
[auto-inserted scaler 0 @ 0000000002d44ca0] w:720 h:576 fmt:bgra sar:0/1 -> w:720 h:576 fmt:uyvy422 sar:0/1 flags:0x4
[Parsed_aresample_0 @ 0000000002d513a0] Setting 'resampler' to value 'soxr'
[graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'time_base' to value '1/44100'
[graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'sample_rate' to value '44100'
[graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'sample_fmt' to value 's16'
[graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'channel_layout' to value '0x3'
[graph 1 input from stream 1:0 @ 0000000002d51460] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
[audio format for output stream 0:1 @ 0000000002d51520] Setting 'sample_fmts' to value 's16'
[audio format for output stream 0:1 @ 0000000002d51520] Setting 'sample_rates' to value '48000'
[audio format for output stream 0:1 @ 0000000002d51520] Setting 'channel_layouts' to value '0x3'
[AVFilterGraph @ 0000000002d4d0c0] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
[Parsed_aresample_0 @ 0000000002d513a0] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
dshow passing through packet of type audio size 88200 timestamp 111637810000 orig timestamp 111637810000
[decklink @ 0000000002dd6a00] Found Decklink mode 720 x 576 with rate 25.00(i)
Output #0, decklink, to 'DeckLink SDI (2)':
Metadata:
encoder : Lavf56.30.100
Stream #0:0, 0, 1/25: Video: rawvideo (UYVY / 0x59565955), uyvy422, 720x576, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc56.35.101 rawvideo
Stream #0:1, 0, 1/48000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Metadata:
encoder : Lavc56.35.101 pcm_s16le
Stream mapping:
Stream #0:0 -> #0:0 (bmp (native) -> rawvideo (native))
Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
Cliping frame in rate conversion by 0.000008
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Encoder did not produce proper pts, making some up.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
*** 40 dup!
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 1.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 2.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 3.
[decklink @ 0000000002dd6a00] Buffered video frames: 4.
[decklink @ 0000000002dd6a00] Buffered video frames: 5.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 6.
[decklink @ 0000000002dd6a00] Buffered video frames: 7.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 8.
[decklink @ 0000000002dd6a00] Buffered video frames: 9.
[decklink @ 0000000002dd6a00] Buffered video frames: 10.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 11.
[decklink @ 0000000002dd6a00] Buffered video frames: 12.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 13.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
dshow passing through packet of type audio size 88200 timestamp 111642810000 orig timestamp 111642810000
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 14.
[decklink @ 0000000002dd6a00] Ending audio preroll.
[decklink @ 0000000002dd6a00] Starting scheduled playback.
[decklink @ 0000000002dd6a00] Buffered video frames: 15.
[decklink @ 0000000002dd6a00] Buffered video frames: 16.
[decklink @ 0000000002dd6a00] Buffered video frames: 17.
[decklink @ 0000000002dd6a00] Buffered video frames: 18.
[decklink @ 0000000002dd6a00] Buffered video frames: 19.
[decklink @ 0000000002dd6a00] Buffered video frames: 20.
[decklink @ 0000000002dd6a00] Buffered video frames: 21.
[decklink @ 0000000002dd6a00] Buffered video frames: 22.
[decklink @ 0000000002dd6a00] Buffered video frames: 23.
[decklink @ 0000000002dd6a00] Buffered video frames: 24.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[decklink @ 0000000002dd6a00] Buffered video frames: 24.
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
frame= 42 fps=0.0 q=0.0 size=N/A time=00:00:01.68 bitrate=N/A dup=40 drop=0
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
dshow passing through packet of type audio size 88200 timestamp 111647710000 orig timestamp 111647710000
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
[gdigrab @ 0000000002d3f2a0] Cursor pos (814,496) -> (-45,491)
[gdigrab @ 0000000002d3f2a0] Cursor pos (814,496) -> (-45,491)
[gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
[gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
[gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
[gdigrab @ 0000000002d3f2a0] Cursor pos (806,497) -> (-53,492) -
Why X.Org's X Server has stopped working on Google Colab ?
20 février 2021, par RahulI am Using X server for the virtual screen on Google Colab and capturing that screen with ffmpeg to record it and live stream it to twitch. (for the reinforcement learning project)




The above process was completely working till my last use of my Colab notebook (on mid-January 2021), but now (on 19th February 2021) I am using the same notebook and the streaming code has stopped working.




I am adding config and log file data below. (I have never seen these files before because it was working, now it's not so I don't have any idea what wrong)


The config file stored at
/etc/X11/xorg.conf
have the following data :

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 418.67

Section "ServerLayout"
 Identifier "Layout0"
 Screen 0 "Screen0"
 InputDevice "Keyboard0" "CoreKeyboard"
 InputDevice "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"
 # generated from default
 Identifier "Mouse0"
 Driver "mouse"
 Option "Protocol" "auto"
 Option "Device" "/dev/mouse"
 Option "Emulate3Buttons" "no"
 Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
 # generated from default
 Identifier "Keyboard0"
 Driver "kbd"
EndSection

Section "Monitor"
 Identifier "Monitor0"
 VendorName "Unknown"
 ModelName "Unknown"
 HorizSync 28.0 - 33.0
 VertRefresh 43.0 - 72.0
 Option "DPMS"
EndSection

Section "Device"
 Identifier "Device0"
 Driver "nvidia"
 VendorName "NVIDIA Corporation"
 BoardName "Tesla T4"
 BusID "PCI:0:4:0"
 MatchSeat "seat-1"
EndSection

Section "Screen"
 Identifier "Screen0"
 Device "Device0"
 Monitor "Monitor0"
 DefaultDepth 24
 Option "AllowEmptyInitialConfiguration" "True"
 SubSection "Display"
 Virtual 1920 1080
 Depth 24
 EndSubSection
EndSection



The log file stored at
/var/log/Xorg.0.log
have the following data :

[ 464.605] 
X.Org X Server 1.19.6
Release Date: 2017-12-20
[ 464.605] X Protocol Version 11, Revision 0
[ 464.605] Build Operating System: Linux 4.15.0-124-generic x86_64 Ubuntu
[ 464.605] Current Operating System: Linux 9d3fe3949671 4.19.112+ #1 SMP Thu Jul 23 08:00:38 PDT 2020 x86_64
[ 464.605] Kernel command line: BOOT_IMAGE=/syslinux/vmlinuz.A init=/usr/lib/systemd/systemd boot=local rootwait ro noresume noswap loglevel=7 noinitrd console=ttyS0 security=apparmor virtio_net.napi_tx=1 systemd.unified_cgroup_hierarchy=false systemd.legacy_systemd_cgroup_controller=false csm.disabled=1 dm_verity.error_behavior=3 dm_verity.max_bios=-1 dm_verity.dev_wait=1 i915.modeset=1 cros_efi loadpin.enabled=0 root=/dev/dm-0 "dm=1 vroot none ro 1,0 4077568 verity payload=PARTUUID=555BDB75-CBD7-CD4A-B24E-29B13D7AC0DF hashtree=PARTUUID=555BDB75-CBD7-CD4A-B24E-29B13D7AC0DF hashstart=4077568 alg=sha256 root_hexdigest=42104d547ac104fb7061529e78f53e4f3e8c3d3cbb040dc6e0f84aad68491347 salt=9dc7f3acc4e2ce65be16356e960c2b21b51a917fa31d2e891fd295490c991e41" mitigations=off
[ 464.605] Build Date: 30 November 2020 08:01:56PM
[ 464.605] xorg-server 2:1.19.6-1ubuntu4.8 (For technical support please see http://www.ubuntu.com/support) 
[ 464.605] Current version of pixman: 0.34.0
[ 464.605] Before reporting problems, check http://wiki.x.org
 to make sure that you have the latest version.
[ 464.605] Markers: (--) probed, (**) from config file, (==) default setting,
 (++) from command line, (!!) notice, (II) informational,
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 464.605] (==) Log file: "/var/log/Xorg.0.log", Time: Sat Feb 20 03:10:44 2021
[ 464.606] (==) Using config file: "/etc/X11/xorg.conf"
[ 464.606] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 464.607] (==) ServerLayout "Layout0"
[ 464.607] (**) |-->Screen "Screen0" (0)
[ 464.607] (**) | |-->Monitor "Monitor0"
[ 464.607] (**) | |-->Device "Device0"
[ 464.607] (**) |-->Input Device "Keyboard0"
[ 464.607] (**) |-->Input Device "Mouse0"
[ 464.607] (==) Automatically adding devices
[ 464.607] (==) Automatically enabling devices
[ 464.607] (==) Automatically adding GPU devices
[ 464.607] (==) Automatically binding GPU devices
[ 464.607] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 464.607] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (WW) The directory "/usr/share/fonts/X11/Type1" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 464.607] Entry deleted from font path.
[ 464.607] (==) FontPath set to:
 /usr/share/fonts/X11/misc,
 built-ins
[ 464.607] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 464.607] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.
[ 464.607] (WW) Disabling Keyboard0
[ 464.607] (WW) Disabling Mouse0
[ 464.607] (II) Loader magic: 0x556eb77b8020
[ 464.607] (II) Module ABI versions:
[ 464.607] X.Org ANSI C Emulation: 0.4
[ 464.607] X.Org Video Driver: 23.0
[ 464.607] X.Org XInput driver : 24.1
[ 464.607] X.Org Server Extension : 10.0
[ 464.607] (EE) dbus-core: error connecting to system bus: org.freedesktop.DBus.Error.FileNotFound (Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory)
[ 464.609] (--) PCI: (0:0:4:0) 10de:1eb8:10de:12a2 rev 161, Mem @ 0xc0000000/16777216, 0x380000000/268435456, 0x390000000/33554432
[ 464.609] (II) no primary bus or device found
[ 464.609] (II) LoadModule: "glx"
[ 464.609] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 464.610] (II) Module glx: vendor="X.Org Foundation"
[ 464.610] compiled for 1.19.6, module version = 1.0.0
[ 464.610] ABI class: X.Org Server Extension, version 10.0
[ 464.610] (II) LoadModule: "nvidia"
[ 464.610] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 464.610] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 464.610] compiled for 4.0.2, module version = 1.0.0
[ 464.610] Module class: X.Org Video Driver
[ 464.610] (II) NVIDIA dlloader X Driver 418.67 Sat Apr 6 02:51:17 CDT 2019
[ 464.610] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 464.610] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[ 464.610] (II) Loading sub module "fb"
[ 464.610] (II) LoadModule: "fb"
[ 464.611] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 464.611] (II) Module fb: vendor="X.Org Foundation"
[ 464.611] compiled for 1.19.6, module version = 1.0.0
[ 464.611] ABI class: X.Org ANSI C Emulation, version 0.4
[ 464.611] (II) Loading sub module "wfb"
[ 464.611] (II) LoadModule: "wfb"
[ 464.611] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 464.611] (II) Module wfb: vendor="X.Org Foundation"
[ 464.611] compiled for 1.19.6, module version = 1.0.0
[ 464.611] ABI class: X.Org ANSI C Emulation, version 0.4
[ 464.611] (II) Loading sub module "ramdac"
[ 464.611] (II) LoadModule: "ramdac"
[ 464.611] (II) Module "ramdac" already built-in
[ 464.637] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[ 464.637] (EE) NVIDIA: system's kernel log for additional error messages and
[ 464.637] (EE) NVIDIA: consult the NVIDIA README for details.
[ 464.662] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[ 464.662] (EE) NVIDIA: system's kernel log for additional error messages and
[ 464.662] (EE) NVIDIA: consult the NVIDIA README for details.
[ 464.662] (EE) No devices detected.
[ 464.662] (==) Matched modesetting as autoconfigured driver 0
[ 464.662] (==) Matched fbdev as autoconfigured driver 1
[ 464.662] (==) Matched vesa as autoconfigured driver 2
[ 464.662] (==) Assigned the driver to the xf86ConfigLayout
[ 464.662] (II) LoadModule: "modesetting"
[ 464.662] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 464.663] (II) Module modesetting: vendor="X.Org Foundation"
[ 464.663] compiled for 1.19.6, module version = 1.19.6
[ 464.663] Module class: X.Org Video Driver
[ 464.663] ABI class: X.Org Video Driver, version 23.0
[ 464.663] (II) LoadModule: "fbdev"
[ 464.663] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 464.663] (II) Module fbdev: vendor="X.Org Foundation"
[ 464.663] compiled for 1.19.3, module version = 0.4.4
[ 464.663] Module class: X.Org Video Driver
[ 464.663] ABI class: X.Org Video Driver, version 23.0
[ 464.663] (II) LoadModule: "vesa"
[ 464.663] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 464.663] (II) Module vesa: vendor="X.Org Foundation"
[ 464.663] compiled for 1.19.3, module version = 2.3.4
[ 464.663] Module class: X.Org Video Driver
[ 464.663] ABI class: X.Org Video Driver, version 23.0
[ 464.663] (II) NVIDIA dlloader X Driver 418.67 Sat Apr 6 02:51:17 CDT 2019
[ 464.663] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 464.663] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 464.663] (II) FBDEV: driver for framebuffer: fbdev
[ 464.663] (II) VESA: driver for VESA chipsets: vesa
[ 464.663] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[ 464.663] (EE) open /dev/dri/card0: No such file or directory
[ 464.663] (WW) Falling back to old probe method for modesetting
[ 464.663] (EE) open /dev/dri/card0: No such file or directory
[ 464.663] (WW) Falling back to old probe method for fbdev
[ 464.663] (II) Loading sub module "fbdevhw"
[ 464.663] (II) LoadModule: "fbdevhw"
[ 464.663] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 464.663] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 464.663] compiled for 1.19.6, module version = 0.0.2
[ 464.663] ABI class: X.Org Video Driver, version 23.0
[ 464.664] (EE) open /dev/fb0: No such file or directory
[ 464.664] (WW) Falling back to old probe method for vesa
[ 464.664] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 464.664] (EE) Screen 0 deleted because of no matching config section.
[ 464.664] (II) UnloadModule: "modesetting"
[ 464.664] (EE) Device(s) detected, but none match those in the config file.
[ 464.664] (EE) 
Fatal server error:
[ 464.664] (EE) no screens found(EE) 
[ 464.664] (EE) 
Please consult the The X.Org Foundation support 
 at http://wiki.x.org
 for help. 
[ 464.664] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 464.664] (EE) 
[ 464.664] (EE) Server terminated with error (1). Closing log file.




I am using this github repo to setup the video-streamer


If anyone wants the colab notebook for the example then I will add it over here.


For this problem I am really not sure where to file an issue for this so that's why I am writing this here.


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