ffmpeg better mpeg-2

REF: http://superuser.com/questions/835871/how-to-make-an-mpeg2-video-file-with-the-highest-quality-possible-using-ffmpeg

You have a few options if you want to stick with MPEG-2:

1. Increase the bitrate.

2. Use a specific quality setting. Change -b:v … to -qscale:v 2. The number here ranges from 1 to 31 and higher means lower quality. There's no point going beyond 4 or 5. If you don't care for the bitrate start with 2 and see if that works for you.