I config ingest model as the fllow
`vhost ingest.srs.com {

ingest livestream {

    enabled on;
  
    input {
        type stream;
        url rtsp://admin:pwd@ip/Streaming/Channels/101;
    }
    ffmpeg ./objs/ffmpeg/bin/ffmpeg;

    engine {
        
        enabled on;
        perfile {
            rtsp_transport tcp;
        }
        vcodec copy;
        acodec copy;           
        output rtmp://10.29.0.201/live/livestream1;
       
    }
}

}
`

Version
SRS 5.0.r3 windows install package

error log

[2025-06-24 20:00:07.131][WARN][576][uv4en812][11] Ingester: Ignore error, code=3028(FFmpegFork)(Failed to fork FFmpeg trancoder process) : ingester start : vfork process failed, cli=./objs/ffmpeg/bin/ffmpeg -loglevel info -re -i rtsp

I hope it can use ffmpeg rtsp_transport to rtmp by the ingest config . when it begin start srs service ,it can trans auto ,thanks .