FFmpeg音视频录制(Windows)

查看本地设备

使用命令ffmpeg -list_devices true -f dshow -i dummy可以列出本地设备

PS C:\Users\18763> ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version 5.1.2-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-shared --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[dshow @ 000001380ceaeac0] "USB Camera" (video)
[dshow @ 000001380ceaeac0]   Alternative name "@device_pnp_\\?\usb#vid_0c45&pid_2183&mi_00#8&26823c6e&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000001380ceaeac0] "screen-capture-recorder" (video)
[dshow @ 000001380ceaeac0]   Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA69364-2C8A-4AE6-A561-56E4B5044439}"
[dshow @ 000001380ceaeac0] "OBS Virtual Camera" (none)
[dshow @ 000001380ceaeac0]   Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{A3FCE0F5-3493-419F-958A-ABA1250EC20B}"
[dshow @ 000001380ceaeac0] "麦克风 (USB 2.0 Camera)" (audio)
[dshow @ 000001380ceaeac0]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{EF64B6BA-652B-4401-843C-9C02877A4AD7}"
[dshow @ 000001380ceaeac0] "virtual-audio-capturer" (audio)
[dshow @ 000001380ceaeac0]   Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E146464-DB61-4309-AFA1-3578E927E935}"
[dshow @ 000001380ceaeac0] "Microphone (High Definition Audio Device)" (audio)
[dshow @ 000001380ceaeac0]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{312192E1-41F6-4E2A-90B7-F830CEB3ABBE}"
dummy: Immediate exit requested

录制视频

录制桌面

FFmpeg调用的是screen-capture-recorder来进行录制的，因此在执行下面的命令之前需要先安装软件screen-capture-recorder-to-video-windows-free

ffmpeg -f dshow -i video="screen-capture-recorder" desktop-out.mp4

录制摄像头

录制所使用的摄像头设备是USB Camera,需要根据自己电脑列出的设备进行更换

ffmpeg -f dshow -i video="USB Camera" video-camera-out.flv

录制声音

录制系统声音

使用virtual-audio-capturer进行录制的

 ffmpeg -f dshow -i audio="virtual-audio-capturer" system-audio-out.aac

同时录制系统声音+麦克风声音

ffmpeg -f dshow -i audio="麦克风 (USB 2.0 Camera)" -f dshow -i audio="virtual-audio-capturer" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 system-out2.aac

命令参数说明

• -f dshow -i audio="麦克风 (USB 2.0 Camera)" 采集第一个音频输入源,即USB麦克风。

• -f dshow -i audio="virtual-audio-capturer" 采集第二个音频输入源,即虚拟音频设备。

• -filter_complex amix=inputs=2:duration=first:dropout_transition=2 使用amix过滤器进行音频混音,将两个音频输入源混合到一起。

  inputs=2表示两个输入源

  duration=first表示采样时长取第一输入源

  dropout_transition=2表示两输入信号间断时的过渡时间

• system-out2.aac 将混音后的音频输出到文件名为system-out2.aac的AAC文件中。

同时录制视频和声音

ffmpeg -f dshow -i audio="virtual-audio-capturer" -f dshow -i audio="麦克风 (USB 2.0 Camera)" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 -f dshow -i video="screen-capture-recorder"  av-out.mp4