FFmpeg command: from beginner to proficient | ffmpeg command video recording

FFmpeg command: from beginner to proficient | ffmpeg command video recording

FFmpeg command: from beginner to proficient | ffmpeg command video recording

This section mainly introduces the method of audio and video recording using ffmpeg command, and lists some examples.

Installation software: Screen Capturer Recorder

Project address: on screen capture recorder to video free Files

Install the latest version:

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install software:

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View available device names

After completing the installation, we can enter the following command on the command line to view the available device names of the computer:

ffmpeg -list_devices true -f dshow -i dummy

Output the following results:

[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

in:

“Integrated Camera”: laptop camera
"screen-capture-recorder": device for recording the desktop
"Microphone (Realtek® Audio)": Microphone
"virtual-audio-capturer": device for recording system sound

Audio and video recording

Record video (default parameters)

desktop:

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

Camera:

ffmpeg -f dshow -i video="Integrated Camera" -y v-out2.flv

Note: It depends on your own camera name.

Record sound (default parameters)

System sound:

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

Note: Ctrl + C exits recording.

System + microphone sound:

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

Note: It depends on your own microphone name.

Record system + microphone sound and video simultaneously (default parameters)

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

View optional parameters for video recording

View screen-capture-recorder related parameters:

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

Output:

[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

View optional parameters for audio recording

View virtual-audio-capturer related parameters:

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

Output:

[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

View microphone (Realtek(R) Audio) related parameters:

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

Output:

[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= 44100
    Last 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

Record audio and video with specified parameters

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

parameter:

-video_size: video size
-vcodec: video encoding format
-framerate: video frame rate
-pixel_format: video pixel format
-b:v: video bit rate
-r: frame rate