Not working ffmpeg output

[info] ffmpeg started on 2019-09-16 at 10:59:04
Report written to "ffmpeg-20190916-105904.log"
Command line:
ffmpeg -y -f x11grab -s wuxga -r 5 -i :1 -c:v h264_v4l2m2m output.avi -loglevel repeat+level+debug -report
[info] ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
[info]   built with gcc 7 (SUSE Linux)
[info]   configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --docdir=/usr/share/doc/packages/ffmpeg --extra-cflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection' --optflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection' --enable-pic --disable-stripping --enable-shared --disable-static --enable-runtime-cpudetect --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape
[info]   libavutil      56. 14.100 / 56. 14.100
[info]   libavcodec     58. 18.100 / 58. 18.100
[info]   libavformat    58. 12.100 / 58. 12.100
[info]   libavdevice    58.  3.100 / 58.  3.100
[info]   libavfilter     7. 16.100 /  7. 16.100
[info]   libswscale      5.  1.100 /  5.  1.100
[info]   libswresample   3.  1.100 /  3.  1.100
[debug] Splitting the commandline.
[debug] Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
[debug] Reading option '-f' ... matched as option 'f' (force format) with argument 'x11grab'.
[debug] Reading option '-s' ... matched as option 's' (set frame size (WxH or abbreviation)) with argument 'wuxga'.
[debug] Reading option '-r' ... matched as option 'r' (set frame rate (Hz value, fraction or abbreviation)) with argument '5'.
[debug] Reading option '-i' ... matched as input url with argument ':1'.
[debug] Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'h264_v4l2m2m'.
[debug] Reading option 'output.avi' ... matched as output url.
[debug] Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'repeat+level+debug'.
[debug] Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
[debug] Finished splitting the commandline.
[debug] Parsing a group of options: global .
[debug] Applying option y (overwrite output files) with argument 1.
[debug] Applying option loglevel (set logging level) with argument repeat+level+debug.
[debug] Applying option report (generate a report) with argument 1.
[debug] Successfully parsed a group of options.
[debug] Parsing a group of options: input url :1.
[debug] Applying option f (force format) with argument x11grab.
[debug] Applying option s (set frame size (WxH or abbreviation)) with argument wuxga.
[debug] Applying option r (set frame rate (Hz value, fraction or abbreviation)) with argument 5.
[debug] Successfully parsed a group of options.
[debug] Opening an input file: :1.
[x11grab @ 0x5605d58b2a40] [debug] Probe buffer size limit of 5000000 bytes reached
[x11grab @ 0x5605d58b2a40] [warning] Stream #0: not enough frames to estimate rate; consider increasing probesize
[info] Input #0, x11grab, from ':1':
[info]   Duration: N/A, start: 1568631544.692377, bitrate: N/A
[info]     Stream #0:0, 1, 1/1000000: Video: rawvideo, 1 reference frame (BGR[0] / 0x524742), bgr0, 1920x1200, 0/1, 5 fps, 1000k tbr, 1000k tbn, 1000k tbc
[debug] Successfully opened the file.
[debug] Parsing a group of options: output url output.avi.
[debug] Applying option c:v (codec name) with argument h264_v4l2m2m.
[debug] Successfully parsed a group of options.
[debug] Opening an output file: output.avi.
[file @ 0x5605d58c1000] [debug] Setting default whitelist 'file,crypto'
[debug] Successfully opened the file.
[info] Stream mapping:
[info]   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_v4l2m2m))
[info] Press [q] to stop, [?] for help
[debug] cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[rawvideo @ 0x5605d58be380] [debug] PACKET SIZE: 9216000, STRIDE: 7680
[debug] detected 8 logical cores
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'video_size' to value '1920x1200'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'pix_fmt' to value '123'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'time_base' to value '1/5'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [debug] Setting 'frame_rate' to value '5/1'
[graph 0 input from stream 0:0 @ 0x5605d58c3b00] [verbose] w:1920 h:1200 pixfmt:bgr0 tb:1/5 fr:5/1 sar:0/1 sws_param:flags=2
[AVFilterGraph @ 0x5605d58c2c80] [debug] query_formats: 3 queried, 2 merged, 0 already done, 0 delayed
[h264_v4l2m2m @ 0x5605d58c0100] [error] Could not find a valid device
[h264_v4l2m2m @ 0x5605d58c0100] [error] can't configure encoder
[error] Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
[AVIOContext @ 0x5605d58c1280] [debug] Statistics: 0 seeks, 0 writeouts
[info] Conversion failed!