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帕武控制

tag-icon • tag-icon audio ffmpeg
帕武控制

我想在我的 ffmpeg cli 中添加音频

ffmpeg -framerate 25 -video_size 1920x1080 -f x11grab -i :0.0 -vf format=yuv420p http://localhost:8080/feed.ffm

编辑

arecord -l

**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC883 Analog [ALC883 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 2: ALC883 Alt Analog [ALC883 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

这是 -L

arecord -L

default
    Playback/recording through the PulseAudio sound server
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
sysdefault:CARD=Intel
    HDA Intel, ALC883 Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Front speakers
dmix:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Direct sample mixing device
dmix:CARD=Intel,DEV=2
    HDA Intel, ALC883 Alt Analog
    Direct sample mixing device
dsnoop:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Direct sample snooping device
dsnoop:CARD=Intel,DEV=2
    HDA Intel, ALC883 Alt Analog
    Direct sample snooping device
hw:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Direct hardware device without any conversions
hw:CARD=Intel,DEV=2
    HDA Intel, ALC883 Alt Analog
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Hardware device with all software conversions
plughw:CARD=Intel,DEV=2
    HDA Intel, ALC883 Alt Analog
    Hardware device with all software conversions

答案1

您必须提供音频输入。假设您想要桌面/“您听到的”/“立体声混音”声音，最简单的方法是使用 pavucontrol 选择要录制的内容，然后使用PulseAudio 输入在ffmpeg。

帕武控制

看使用 ffmpeg 捕获桌面音频以使用 pavucontrol。

或者使用pactl list sources

如果您不想使用 pavucontrol，请使用以下命令列出音频源pactl list sources：

$ pactl list sources | grep monitor
        Name: alsa_output.pci-0000_01_00.1.hdmi-stereo-extra1.monitor
                device.class = "monitor"
        Name: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
                device.class = "monitor"

然后运行ffmpeg：

ffmpeg -framerate 25 -video_size 1920x1080 -f x11grab -i :0.0 -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -c:v libx264 -c:a aac -vf format=yuv420p http://localhost:8080/feed.ffm

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