从youtube下载视频并转换为MP4

screenshotvideo

def screenshotvideo(url,interval,id,fullduration,title,quality):
    interval = int(interval)
    parsed_t = isodate.parse_duration(fullduration)
    durationseconds=parsed_t.total_seconds()
    iterat=int(durationseconds/int(interval))
    for i in range(0,iterat):
        print(str(id))
        print(str(i))
        print(str(i*interval))
        part(url,time.strftime('%H:%M:%S',time.gmtime(int(i*interval))),"00:00:01",title+"-"+str(id),quality)

部分

def part(url,starttime,duration,name,quality):
    f = os.popen("ffmpeg $(youtube-dl -f "+quality+" -g '"+url+"' | sed 's/.*/-ss "+starttime+" -i &/') -t "+duration+" -c copy "+name+".mp4")
    now = f.read()
    print(now)
    f = os.popen("ffmpeg -i "+name+".mp4 -ss 00:00:00 -vframes 1 "+name+".jpg")
    now = f.read()
    print(now)
    f = os.popen("rm -rf "+name+".mp4")
    now = f.read()
    print(now)

所以我在第一个ffmpeg命令中得到了以下错误

[mp4 @ 0x55d537f64240] Could not find tag for codec vp8 in stream #0,codec not currently supported in container.

Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument