bug report on CDN/FFmpeg_patches/0001-Add-SVT-HEVC-FLV-support-on-FFmpeg.patch

In the function flv_write_packet(AVFormatContext *s, AVPacket *pkt), the following code was added which will causes decoding errors (because the header info should not be write to every frame, it just need to be write at the beginning)：
+        } else {
+            flv_write_codec_header(s, par, pkt->dts);