Thanks so much for the help. Not sure why but when I try to upgrade ffmpeg using the ppa as you suggested I get:
ffmpeg is already the newest version (7:4.4.2-0ubuntu0.22.04.1+esm5). however if I check with "ffmpeg -version " I get : ffmpeg version 4.4.2-0ubuntu0.22.04.1+esm5 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04) There is no 7 showing up in the version number, though maybe I already have the newest version installed? On Thu, Nov 7, 2024 at 6:37 PM Ferdi Scholten <fe...@sttc-nlp.nl> wrote: > I'm using Ubuntu 22.04 and ffmpeg version 4.4.2-0 > > I'm capturing 3 rtsp streams as shown at the bottom . > > Stream A resolution is 1600x1200 > > Stream B and Stream C resolution is 384x192 . > > Stream A and B are coming from one device (ip address) and Stream C is > > coming from a second device (ip address) > > > > When I start Stream A and capture it with the command below I get a cpu > > usage of around 90% using the top command. If I then start stream B > > simultaneously it shows about 25% cpu usage in another ffmpeg instance. > > > > Then with the other 2 streams running I start Stream C and it shows about > > 90% cpu usage. > > > > If I start Stream B on it's own it shows 90% cpu usage. > > > > In other words it doesn't seem to matter what the resolution of the video > > coming in is but rather which stream starts first that determines the cpu > > usage. Does it matter that Stream A an B are coming from the same ip > > address and that explains why the second stream uses less cpu? My > > expectation is that Stream B and C would have the same cpu usage since > they > > are the same resolution just coming from different devices. Can anyone > > explain what I see as strange behaviour. Stream commands follow. > > > > > > Stream A: ffmpeg -f rtsp -irtsp://192.168.35.243:8086/?camera=world -f > > v4l2 /dev/video2 > > > > Stream B: ffmpeg -f rtsp -irtsp://192.168.35.243:8086/?camera=eyes -vf > > format=yuv420p -f v4l2 /dev/video3 > > > > Stream C: ffmpeg -f rtsp -irtsp://192.168.35.247:8086/?camera=eyes -vf > > format=yuv420p -f v4l2 /dev/video5 > > > > Thanks, > > Jim > > _______________________________________________ > > > Does this also happen if you use a less antique version of ffmpeg? > Either a static build or build it from git master or use a ppa? were at > version 7.1 now. > Current versions are much better in using multiple threads and there > have been numerous changes to internal code to improve the resource usage. > > for ease of use this ppa delivers ffmpeg 7.1 for ubuntu 22.04 > https://ubuntuhandbook.org/index.php/2024/04/ffmpeg-7-0-ppa-ubuntu/ > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.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 ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
