ffmpeg -f x11grab -video_size 1920x1080 -i :0 output.mp4
ffmpeg -f x11grab -video_size 1920x1080 -i :0 output.mp4
ffmpeg version 4.1.7 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04)
configuration: --disable-static --enable-shared
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
[x11grab @ 0x55e93e579740] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0':
Duration: N/A, start: 1632986648.181873, bitrate: N/A
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc
File 'output.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf58.20.100
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1920x1080, q=2-31, 200 kb/s, 29.97 fps, 30k tbn, 29.97 tbc
Metadata:
encoder : Lavc58.35.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 894 fps= 44 q=31.0 Lsize= 7757kB time=00:00:29.79 bitrate=2132.5kbits/s dup=292 drop=290 speed=1.46x
video:7752kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.060582%
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