老师Windows下的cywin64怎么执行录制。ffmpeg我已经编译好了

Question

$ ./ffmpeg -f avfoundation -i 1 -r 30 out.yuv
ffmpeg version 4.0.2 Copyright © 2000-2018 the FFmpeg developers
built with gcc 7.4.0 (GCC)
configuration: --prefix=/usr/local/ffmpeg --enable-gpl --enable-small --arch=xmizations --enable-shared
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Unknown input format: 'avfoundation’

Antony@DESKTOP-4I1339S /usr/local/ffmpeg/bin
$ ./ffmpeg -f desktop -i 1 -r 30 out.yuv
ffmpeg version 4.0.2 Copyright © 2000-2018 the FFmpeg developers
built with gcc 7.4.0 (GCC)
configuration: --prefix=/usr/local/ffmpeg --enable-gpl --enable-small --arch=xmizations --enable-shared
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Unknown input format: 'desktop’

Answer 1

文川雪 2019-09-26 01:57:01

ffmpeg -f gdigrab  -i desktop out.mp4

Answer 2

李超 2019-09-08 17:56:24

你搜索一下ffmpeg,gdi 应该就找到答案了

• 文川雪 #1

  老师好，-f 不是用来指定format(格式)吗，为什么录制屏幕后面跟的是device(设备)。使用ffmpeg -h 查看后面是format,根据这个说明和见名知意的特点，有点不明白，反应不过来。望说明一下，谢谢

• 文川雪 #2

  -formats
  Show available formats (including devices).
  -f fmt (input/output)
  Force input or output file format. The format is normally auto detected for input files and guessed from the file extension for output files, so this option is not needed in most cases.
  官网文档