FFmpeg 命令：从入门到精通 | ffmpeg 命令视频录制

FFmpeg 命令：从入门到精通 | ffmpeg 命令视频录制

本节主要介绍了ffmpeg 命令进行音视频录制的方法，并列举了一些例子。

安装软件：Screen Capturer Recorder

项目地址：on screen capture recorder to video free Files

安装最新版本：

安装软件：

查看可用设备名字

完成安装后，我们可以在命令行输入以下命令查看电脑的可用设备名字：

ffmpeg -list_devices true -f dshow -i dummy

输出以下结果：

[dshow @ 000001e3fded3800] "Integrated Camera" (video)
[dshow @ 000001e3fded3800]   Alternative name "@device_pnp_\\?\usb#vid_13d3&pid_56a6&mi_00#6&1c1093a4&1&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000001e3fded3800] "screen-capture-recorder" (video)
[dshow @ 000001e3fded3800]   Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA69364-2C8A-4AE6-A561-56E4B5044439}"
[dshow @ 000001e3fded3800] "OBS Virtual Camera" (video)
[dshow @ 000001e3fded3800]   Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{A3FCE0F5-3493-419F-958A-ABA1250EC20B}"
[dshow @ 000001e3fded3800] "麦克风 (Realtek(R) Audio)" (audio)
[dshow @ 000001e3fded3800]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{E35D34C8-3763-4470-BDFF-5999B6DB4347}"
[dshow @ 000001e3fded3800] "virtual-audio-capturer" (audio)
[dshow @ 000001e3fded3800]   Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E146464-DB61-4309-AFA1-3578E927E935}"
[dshow @ 000001e3fded3800] "立体声混音 (Realtek(R) Audio)" (audio)
[dshow @ 000001e3fded3800]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{159589C7-204D-4C6C-8804-B576E8B7DC6C}"
dummy: Immediate exit requested

其中：

• “Integrated Camera”：笔记本摄像头
• “screen-capture-recorder”：录制桌面的设备
• “麦克风 (Realtek® Audio)”：麦克风
• “virtual-audio-capturer”：录制系统声音的设备

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 Camera" -y v-out2.flv

注：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-capturer" a-out.aac

注：Ctrl + C 退出录制。

系统 + 麦克风声音：

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

注：要根据自己麦克风名称。

同时录制系统 + 麦克风声音和视频（默认参数）

ffmpeg -f dshow -i audio="麦克风 (Realtek(R) 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"  -y av-out.flv

查看视频录制的可选参数

查看 screen-capture-recorder 相关参数：

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

输出：

[dshow @ 0000023f4f3a3740] DirectShow video device options (from video devices)
[dshow @ 0000023f4f3a3740]  Pin "Capture" (alternative pin name "1")
[dshow @ 0000023f4f3a3740]   pixel_format=bgr0  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=bgr0  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=bgr24  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=rgb555le  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=rgb555le  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=rgb8  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740]   pixel_format=yuv420p  min s=1x1 fps=0.02 max s=1920x1080 fps=30
[dshow @ 0000023f4f3a3740] Could not find output pin from video capture device.
video=screen-capture-recorder: I/O error

查看音频录制的可选参数

查看 virtual-audio-capturer 相关参数：

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

输出：

[dshow @ 0000024b7e113740] DirectShow audio only device options (from audio devices)
[dshow @ 0000024b7e113740]  Pin "Capture Virtual Audio Pin" (alternative pin name "1")
[dshow @ 0000024b7e113740]   ch= 2, bits=16, rate= 48000
audio=virtual-audio-capturer: Immediate exit requested

查看 麦克风 (Realtek(R) Audio) 相关参数：

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

输出：

[dshow @ 00000260768b3700] DirectShow audio only device options (from audio devices)
[dshow @ 00000260768b3700]  Pin "Capture" (alternative pin name "Capture")
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 44100Last message repeated 1 times
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 44100
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 32000
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 32000
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 22050
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 22050
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 11025
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 11025
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate=  8000
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate=  8000
[dshow @ 00000260768b3700]   ch= 2, bits= 8, rate= 44100
[dshow @ 00000260768b3700]   ch= 1, bits= 8, rate= 44100
[dshow @ 00000260768b3700]   ch= 2, bits= 8, rate= 22050
[dshow @ 00000260768b3700]   ch= 1, bits= 8, rate= 22050
[dshow @ 00000260768b3700]   ch= 2, bits= 8, rate= 11025
[dshow @ 00000260768b3700]   ch= 1, bits= 8, rate= 11025
[dshow @ 00000260768b3700]   ch= 2, bits= 8, rate=  8000
[dshow @ 00000260768b3700]   ch= 1, bits= 8, rate=  8000
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 48000
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 48000
[dshow @ 00000260768b3700]   ch= 2, bits=16, rate= 96000
[dshow @ 00000260768b3700]   ch= 1, bits=16, rate= 96000
audio=麦克风 (Realtek(R) Audio): Immediate exit requested

指定参数录制音视频

ffmpeg -f dshow -i audio="麦克风 (Realtek(R) 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-capture-recorder" -vcodec h264_qsv  -b:v 3M  -y av-out.flv

ffmpeg -f dshow -i audio="麦克风 (Realtek(R) 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 av-out2.mp4

ffmpeg -f dshow -i audio="麦克风 (Realtek(R) 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

参数：

• -video_size：视频大小
• -vcodec：视频编码格式
• -framerate：视频帧率
• -pixel_format：视频像素格式
• -b:v：视频码率
• -r：帧率