h264_amf miss SPS and PPS

[evenstar]

I am developing a software involve H264 encode using ffmpeg, recently. When i use h264_qsv and h264_nvenc, everything is ok. But i found the stream encoded by h264_amf, the SPS and PPS only contained by first GOP. I wonder whether i missing set some parameter?

[Hellopoplar]

if you set AV_CODEC_FLAG_GLOBAL_HEADER, the sps/pps will only output once (no repeated headers)