Alexey Khit
42 lines
2.2 KiB
Markdown
42 lines
2.2 KiB
Markdown
## Devices Windows
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```
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>ffmpeg -hide_banner -f dshow -list_options true -i video="VMware Virtual USB Video Device"
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[dshow @ 0000025695e52900] DirectShow video device options (from video devices)
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[dshow @ 0000025695e52900] Pin "Record" (alternative pin name "0")
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[dshow @ 0000025695e52900] pixel_format=yuyv422 min s=1280x720 fps=1 max s=1280x720 fps=10
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[dshow @ 0000025695e52900] pixel_format=yuyv422 min s=1280x720 fps=1 max s=1280x720 fps=10 (tv, bt470bg/bt709/unknown, topleft)
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[dshow @ 0000025695e52900] pixel_format=nv12 min s=1280x720 fps=1 max s=1280x720 fps=23
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[dshow @ 0000025695e52900] pixel_format=nv12 min s=1280x720 fps=1 max s=1280x720 fps=23 (tv, bt470bg/bt709/unknown, topleft)
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```
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## Devices Mac
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```
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% ./ffmpeg -hide_banner -f avfoundation -list_devices true -i ""
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[AVFoundation indev @ 0x7f8b1f504d80] AVFoundation video devices:
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[AVFoundation indev @ 0x7f8b1f504d80] [0] FaceTime HD Camera
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[AVFoundation indev @ 0x7f8b1f504d80] [1] Capture screen 0
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[AVFoundation indev @ 0x7f8b1f504d80] AVFoundation audio devices:
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[AVFoundation indev @ 0x7f8b1f504d80] [0] Soundflower (2ch)
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[AVFoundation indev @ 0x7f8b1f504d80] [1] Built-in Microphone
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[AVFoundation indev @ 0x7f8b1f504d80] [2] Soundflower (64ch)
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```
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## Devices Linux
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```
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# ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
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[video4linux2,v4l2 @ 0x7f7de7c58bc0] Raw : yuyv422 : YUYV 4:2:2 : 640x480 160x120 176x144 320x176 320x240 352x288 432x240 544x288 640x360 752x416 800x448 800x600 864x480 960x544 960x720 1024x576 1184x656 1280x720 1280x960
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[video4linux2,v4l2 @ 0x7f7de7c58bc0] Compressed: mjpeg : Motion-JPEG : 640x480 160x120 176x144 320x176 320x240 352x288 432x240 544x288 640x360 752x416 800x448 800x600 864x480 960x544 960x720 1024x576 1184x656 1280x720 1280x960
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```
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## Useful links
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- https://superuser.com/questions/564402/explanation-of-x264-tune
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- https://stackoverflow.com/questions/33624016/why-sliced-thread-affect-so-much-on-realtime-encoding-using-ffmpeg-x264
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- https://codec.fandom.com/ru/wiki/X264_-_описание_ключей_кодирования
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- https://html5test.com/
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- https://trac.ffmpeg.org/wiki/Capture/Webcam
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- https://trac.ffmpeg.org/wiki/DirectShow
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