RTMP stream transcoding error, may I inquire where the issue lies?

[zubin999]

Transcoding configuration:

vhost zlpush.v4.xinmem.com {
transcode {
        enabled     on;
        ffmpeg      /usr/local/bin/ffmpeg;
        engine 720 {
            enabled         on;
            vcodec          libx264;
            vbitrate        1500;
            vwidth          1280;
            vheight         720;
            vthreads        12;
            vpreset         medium;
            vprofile        main;
            vparams {
            }
            acodec          libfdk_aac;
            aparams {
            }
            output          rtmp://127.0.0.1:[port]/[app]/[stream]_[engine]?vhost=[vhost];
        }
}

FFmpeg log:

process ppid=18219, cid=y0047375, pid=19886, in=0, out=1, err=2
process binary=/usr/local/bin/ffmpeg, cli: /usr/local/bin/ffmpeg -f flv -i rtmp://127.0.0.1:80/live?vhost=zlpush.v4.xinmem.com/5ae4d662c1834b02a2dbc0d632e9852b -vcodec libx264 -b:v 1500000 -s 1280x720 -aspect 1280:720 -threads 12 -profile:v main -preset medium -acodec libfdk_aac -f flv -y rtmp://127.0.0.1:80/live/5ae4d662c1834b02a2dbc0d632e9852b_720?vhost=zlpush.v4.xinmem.com 1 > ./objs/ffmpeg-encoder-zlpush.v4.xinmem.com-live-5ae4d662c1834b02a2dbc0d632e9852b-720.log 2 > ./objs/ffmpeg-encoder-zlpush.v4.xinmem.com-live-5ae4d662c1834b02a2dbc0d632e9852b-720.log
process actual cli: /usr/local/bin/ffmpeg -f flv -i rtmp://127.0.0.1:80/live?vhost=zlpush.v4.xinmem.com/5ae4d662c1834b02a2dbc0d632e9852b -vcodec libx264 -b:v 1500000 -s 1280x720 -aspect 1280:720 -threads 12 -profile:v main -preset medium -acodec libfdk_aac -f flv -y rtmp://127.0.0.1:80/live/5ae4d662c1834b02a2dbc0d632e9852b_720?vhost=zlpush.v4.xinmem.com
ffmpeg version n6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-libx264 --pkg-config='pkg-config --static'
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   4. 12.100 /  4. 12.100
  libpostproc    57.  3.100 / 57.  3.100
[rtmp @ 0x3b25f40] Cannot read RTMP handshake response
[in#0 @ 0x3b25400] Error opening input: End of file
Error opening input file rtmp://127.0.0.1:80/live?vhost=zlpush.v4.xinmem.com/5ae4d662c1834b02a2dbc0d632e9852b.
Error opening input files: End of file

TRANS_BY_GPT4