Hi Team Any update on this?
i am struggling with live streaming of 4k videos with or without GPU. My question before describing my issue is what is number of 4k videos that can transcoded and live streamed using below configuration . 1 X R740xd dell system - configuration is 2 socket , 88 core processors with 256 GB of RAM- (ubuntu 18.04.02 OS ) + Tesla T4 GPU + Nginix & RTMP Transcoding and streaming all happening in one system , viewing of stream is in windows system with vlc player . Below is the first command I was trying , the issue is that the video live streaming runs perfectly with 6 simultaneous streams of 4k but when the 7th stream starts , all goes bad and fps start dropping [ Its with CPU ] . The only thing i notice is more CPU utilization and that could be reason of FPS drop ffmpeg -re -i Stranger09.mkv -c:v libx264 -b:v 50M -preset ultrafast -tune zerolatency -b:a 128k -s 4096x2160 -bufsize 5M -x264opts keyint=500 -g 60 -pix_fmt yuv420p -f flv rtmp://194.167.137.11/live-test/Strange09_4k Some guys on IRC channel recommended me to omit / edit below mentioned parameters but still its not working Remove -tune zerolatency keyint=500 -g 60 , both are same so does use it together need to limit thread by adding -thread x I tried using GPU to scale up the simultaneous streaming but it also going bad after 6 streams , below is the command . Here I can see less CPU utilization , like 20% , 80% is still free but GPU is 100% stressed . fmpeg -hwaccel_device 1 -hwaccel cuvid -re -i Stranger02.mkv -c:v h264_nvenc -preset fast -b:v 10M -bufsize 20M -x264opts keyint=500 -pix_fmt yuv420p -f flv rtmp://194.167.137.11/live-test/Strange02_4k I tried using GPU + CPU as 80% CPU is free after 100% GPU utilization but I cannot run more than 7 simultaneous streams . Please help me with correct usage of FFMPEG to scale up the 4k videos . My end goal is to achieve 1Gbps read/writes on storage media. Network is not in picture as transcoding and streaming all running on 1 server . On Wed, Oct 9, 2019 at 10:47 AM Karan Singh <[email protected]> wrote: > > The nginx server, how many workers are running? > > 1024 workers running > > On Tue, Oct 8, 2019 at 12:14 PM Ted Park <[email protected]> wrote: > >> > Is there any other issue that is causing problems in running more >> number of >> > simoultaneus streams ? >> >> The nginx server, how many workers are running? >> _______________________________________________ >> ffmpeg-user mailing list >> [email protected] >> https://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> [email protected] with subject "unsubscribe". > > _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
