小编Mil*_*lad的帖子

如何使用ffmpeg将视频从H.264(高4:4:4配置文件)转换为H.264(主配置文件)？

我不能用这个命令做到这一点:ffmpeg -i 1/25359.mp4 -profile:v main out.mp4.

那会返回一个错误:

...
That'd return an error:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1/25359.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.40.101
  Duration: 00:00:06.08, start: 0.000000, bitrate: 1059 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 351x297, 1057 kb/s, 12.50 fps, 12.50 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility …

如何让Google No CAPTCHA reCAPTCHA成为必填字段？
我的意思是,我想用HTML或JavaScript检查它.