ffmpeg conversion
./ffmpeg -i video_in.avi -acodec aac -ac 2 -strict experimental -ab 160k -s 624x352 -vcodec libx264 -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 video_out_file.mp4