[FFmpeg-user] hi, problem after install ffmpeg on my mac

[cali cali]

Hi, I have a problem. 
I installed ffmpeg on my mac to convert to webm and do a test. 
The test went well. The problem is that now on my mac when I try to use vlc or quicktime to watch a video, 
they no longer play audio. 
I have audio on my computer if I watch a YouTube video, but if I try to see it from my files on my computer, 
I don't have audio ....? any suggestions? 

Let me tell you what I did to convert the file:

ffmpeg -i video.mp4 -c vp9 -b:v 0 -crf 41 newvideo.webm

so perhaps you can tell me how to solve this?
 thanks in advance.
juan