Have you benchmark the ffmpeg during the runtime to check where is the bottleneck ?
On Thu, Oct 10, 2019 at 10:11 AM Karan Singh <karanveersingh5...@gmail.com> wrote: > 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://220.127.116.11/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://18.104.22.168/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 <karanveersingh5...@gmail.com> > wrote: > > > > The nginx server, how many workers are running? > > > > 1024 workers running > > > > On Tue, Oct 8, 2019 at 12:14 PM Ted Park <kumowoon1...@gmail.com> 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@example.com > >> https://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> > >> To unsubscribe, visit link above, or email > >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > > > > > _______________________________________________ > ffmpeg-user mailing list > firstname.lastname@example.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list email@example.com https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".