html5 video tag codecs attribute

Question

I am trying to specify a specific video/audio codec in the video tag using

Answer 1

You can use MP4Box tool to find out codec strings in RFC6381 format. Still you have to join them with commas.

You can use this command:

MP4Box -info big.mp4 2>&1 | grep RFC6381 | awk '{print $4}' | paste -sd , -