ffmpeg -i audio.aac -i ch2.h264 -acodec copy -vcodec copy -f mpegts out.ts
ffmpeg -rtsp_transport tcp -i rtsp://fuck.com/fuck/fuck -c copy -f flv rtmp://shit.com/shit/shit
./ffmpeg -y -err_detect ignore_err -i "rtmp://uplive.b0.upaiyun.com/live/loading timeout=10" -f image2 -vframes 1 a.jpg
./ffmpeg -y -err_detect ignore_err -i "rtmp://uplive.b0.upaiyun.com/live/loading live=1 timeout=10" -f image2 -vframes 1 a.jpg