ffmpeg 录屏 screen capture recorder

ffmpeg在Linux下用X11grab进行屏幕录像,在Windows下用DirectShow滤镜

首先需要安装一个软件,screen capture recorder

编译好的下载地址是:

http://sourceforge.net/projects/screencapturer/

源码地址是:

https://github.com/rdp/screen-capture-recorder-to-video-windows-free

安装完了之后,在命令行执行:

ffmpeg -list_devices true -f dshow -i dummy

系统输出大致如下:

[dshow @ 002db420] DirectShow video devices
[dshow @ 002db420]  "screen-capture-recorder"
[dshow @ 002db420] DirectShow audio devices
[dshow @ 002db420]  "virtual-audio-capturer"

ffmpeg已经可以捕获到DirectShow视频设备,和音频设备了.

"screen-capture-recorder" 这个就是桌面捕获设备,如果电脑上连有摄像头,也会列出来.

"virtual-audio-capturer" 这个是音频捕获设备

然后就可以用FFMPEG来进行录像了

ffmpeg -f dshow -i video="screen-capture-recorder" -f dshow -i audio="virtual-audio-capturer" -pix_fmt yuv420p -vcodec libx264 -acodec libvo_aacenc -s 1280x720 -r 25 -q 10 -ar 44100 -ac 2 -tune zerolatency -preset ultrafast -f mpegts - | ffmpeg -f mpegts -i - -c copy -bsf:a aac_adtstoasc -f flv temp.flv