func write() {
m, _ := mp4.Open("/Users/Xieran/Desktop/a.mp4")
fmt.Println(m.W, m.H)
pkts := m.ReadDur(20)
m2, _ := mp4.Create("/tmp/out.mp4")
fmt.Println(len(pkts))
for _, p := range pkts {
fmt.Println(p)
m2.Write(p)
}
m2.Close()
}
func read() {
m, err := mp4.Open("/tmp/out.mp4")
mp4.LogLevel(0)
fmt.Println(m.W)
}