I am trying to record my Skype calls using ffmpeg. I need to record audio (pulseaudio) & video (X). But it seems that it is a bit tricky...
For audio recording I want to use my Scarlet 2i4 audio interface that is listed as device number 10 in pulseaudio:
ziga@ziga-laptop:~$ pactl list short cards
2 alsa_card.pci-0000_00_1b.0 module-alsa-card.c
10 alsa_card.usb-Focusrite_Scarlett_2i4_USB-00 module-alsa-card.c
~$ pactl list short sinks
16 alsa_output.usb-Focusrite_Scarlett_2i4_USB-00.analog-surround-40 module-alsa-card.c s32le 4ch 44100Hz SUSPENDED
~$ pactl list short sources
24 alsa_output.usb-Focusrite_Scarlett_2i4_USB-00.analog-surround-40.monitor module-alsa-card.c s32le 4ch 44100HzSUSPENDED
25 alsa_input.usb-Focusrite_Scarlett_2i4_USB-00.analog-stereo module-alsa-card.c s32le 2ch 44100Hz IDLE
From this I can see that my desired card is a device 10 so I structured my ffmpeg command like this:
ffmpeg \
-f x11grab -s 1920x1080 -probesize 17M -r 30 -i :0.0+0+0 \
-f pulse -ac 2 -device 10 \
-output.mkv
哪里：
- 第二行指定所有视频输入参数（已测试并工作）
- 第三行指定所有音频参数（不起作用）
但是当我执行命令时，我得到了错误：
Output #0, pulse, to 'output.mkv':
Output file #0 does not contain any stream
有谁知道为什么吗？如何录制Skype声音？
