我从系统声音中录制的任何内容的输出都使用portaudioorparec的音量非常低。
从这个答案中-49dB看到的最大音量。ffmpeg -i video.avi -af "volumedetect" -vn -sn -dn -f null /dev/null
我发现问题是这样的
这是的输出
pactl list sources
Source #0
State: SUSPENDED
Name: alsa_output.pci-0000_00_1f.3.analog-stereo.monitor
Description: Monitor of Built-in Audio Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 48000Hz
Channel Map: front-left,front-right
Owner Module: 6
Mute: no
Volume: front-left: 9995 / 15% / -49.00 dB, front-right: 9995 / 15% / -49.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor of Sink: alsa_output.pci-0000_00_1f.3.analog-stereo
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY
Properties:
device.description = "Monitor of Built-in Audio Analog Stereo"
device.class = "monitor"
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xd52b0000 irq 132"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1f.3"
sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "9d71"
device.form_factor = "internal"
device.string = "0"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
Formats:
pcm
...
正如你所看到front-left: 9995 / 15% / -49.00 dB, front-right: 9995 / 15% / -49.00 dB的，我需要它们都被100%我尝试过pactl set-sink-vloume 0 100%，但它什么也没做。
我也试过https://askubuntu.com/a/1206159/971923。
将左右都更改为 a 的命令是100%什么？
我也没有看到那些alsamixer。
使用 Ubuntu 20.04
我相信操作系统与这个问题无关（我要求一个特定于 pactl 或相关软件（如 alsamixer）的命令）。