FFMPEG音频未录制

debugcn 发表于 Dev

邦西

我在Ubuntu上用FFMPEG录制声音时遇到一些问题。

ffmpeg -v verbose -f x11grab -y -r 60 -s 1920x1080 -i :0.0 -vcodec mpeg4 -f alsa -i pulse -ar 44100 -acodec libmp3lame -ab 192k -ac 2 output.mp4 -qscale 0

视频可以完美播放，并且文件大小很小，但是没有声音输出。

用户名

默认设置？

在这里，Kubuntu 13.10-ffmpeg 2.1.4

此处的默认值为PulseAudion控件：“内置音频模拟立体声”，并且捕获的声音不存在。

我需要将Alsa Capture更改为内置音频模拟立体声的监视器。然后捕捉到声音。

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此处的演练：

a）启动pavucontrol

PulseAudio音量控制或pavucontrol为：

:~$ apt-cache show pavucontrol

Package: pavucontrol

Priority: optional

Section: universe/sound
...

Description: PulseAudio Volume Control

 PulseAudio, previously known as Polypaudio, is a sound server for POSIX and
 WIN32 systems. It is a drop in replacement for the ESD sound server with
 much better latency, mixing/re-sampling quality and overall architecture.
 .
 PulseAudio Volume Control (pavucontrol) is a simple GTK+ based volume
 control tool (mixer) for the PulseAudio sound server. In contrast to
 classic mixer tools this one allows you to control both the volume of
 hardware devices and of each playback stream separately. It also allows
 you to redirect a playback stream to another output device without
 interrupting playback.

Homepage: http://0pointer.de/lennart/projects/pavucontrol/

b）启动ffmpeg脚本

c）选择一个音源

在这里，pavucontrol具有以下选项：

在此处输入图片说明