（音视频学习笔记）：ffmpeg命令音视频录制

• 【说明】课程学习地址：https://ke.qq.com/course/468797

目录

ffmpeg命令视频录制

音视频录制

查看视频录制的可选参数

查看音频设备可选参数

指定参数录制音视频

ffmpeg命令视频录制

• ①安装dshow软件 Screen Capturer Recorder，
  • 项目地址：https://sourceforge.net/projects/screencapturer/files/
• ②查看可用设备名字：

 ffmpeg  -list_devices true -f dshow -i dummy

• ③输入命令：DirectShow video devices (some may be both video and audio devices)
  • "Integrated Webcam" //笔记本摄像头
  • "screen-capture-recorder"
• ④输入命令：DirectShow audio devices
  • "麦克风(Realtek Audio)"
  • "virtual-audio-capturer"

音视频录制

【录制视频（默认参数）】

• 桌面：

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

• 摄像头：

ffmpeg -f dshow -i video="Integrated Webcam" -y v-out2.flv (要根据自己摄像头名称)

【录制声音（默认参数）】

• 系统声音：

ffmpeg -f dshow -i audio="virtual-audio-cap

• 系统+麦克风声音：

ffmpeg -f dshow -i audio="麦克风 (Realtek Audio)" \
-f dshow -i audio="virtual-audio-capturer" -filter_complex \
amix=inputs=2:duration=first:dropout_transition=2 a-out2.aac

【同时录制声音和视频（默认参数）】

ffmpeg -f dshow -i audio="麦克风 (Realtek Audio)" \
-f dshow -i audio="virtualaudio-capturer" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 \
-f dshow -i video="screen-capture-recorder" -y av-out.flv

查看视频录制的可选参数

• 命令：

ffmpeg -f dshow -list_options true -i video="screen-capture-recorder"

[dshow @ 02f0d6c0] DirectShow video device options (from video devices)
[dshow @ 02f0d6c0] Pin "Capture" (alternative pin name "1")
[dshow @ 02f0d6c0] pixel_format=bgr0 min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=bgr0 min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=bgr24 min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=rgb555le min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=rgb555le min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=rgb8 min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 02f0d6c0] pixel_format=yuv420p min s=1x1 fps=0.02 max s=1920x1080 fps=30

查看音频设备可选参数

ffmpeg -f dshow -list_options true -i audio="virtual-audio-capturer“

[dshow @ 05a2d6c0] DirectShow audio only device options (from audio devices)
[dshow @ 05a2d6c0] Pin "Capture Virtual Audio Pin" (alternative pin name "1")
[dshow @ 05a2d6c0] min ch=2 bits=16 rate= 48000 max ch=2 bits=16 rate= 48000

ffmpeg -f dshow -list_options true -i audio="麦克风 (Realtek Audio)

指定参数录制音视频

fmpeg -f dshow -i audio="麦克风 (Realtek Audio)" \
-f dshow -i audio="virtual-audio-capturer" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 \
-f dshow -video_size 1920x1080 -framerate 15 -pixel_format yuv420p -i video="screen-capturerecorder" -vcodec h264_qsv -b:v 3M -y av-out.flv

• 加上 -r 15

ffmpeg -f dshow -i audio="麦克风 (Realtek Audio)" \
-f dshow -i audio="virtual-audio-capturer" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 \
-f dshow -i video="screen-capture-recorder" -vcodec h264_qsv -b:v 3M -r 15 -y avout2.mp4

• 加上 -framerate 15 -pixel_format yuv420p

ffmpeg -f dshow -i audio="麦克风 (Realtek Audio)" \
-f dshow -i audio="virtual-audio-capturer" -filter_complex amix=inputs=2:duration=first:dropout_transition=2 \
-f dshow -framerate 15 -pixel_format yuv420p -i video="screen-capture-recorder" -vcodec
h264_qsv -b:v 3M -r 15 -y av-out3.mp4