Hi, Here are the three commands used: ffmpeg -threads 0 -loglevel repeat+level+verbose -f lavfi -i testsrc2=s=1920x1080:r=30 -f lavfi -i sine -c:a aac -ar 48000 -b:a 64k -c:v libx264 -crf 18 -preset medium -tune zerolatency -pix_fmt yuv420p -f mpegts - > NUL1 ffmpeg -threads 0 -loglevel repeat+level+verbose -f lavfi -i testsrc2=s=1920x1080:r=30 -f lavfi -i sine -c:a aac -ar 48000 -b:a 64k -c:v libx264 -crf 18 -preset medium -tune zerolatency -pix_fmt yuv420p -f mpegts - > NUL2 ffmpeg -threads 0 -loglevel repeat+level+verbose -f lavfi -i testsrc2=s=1920x1080:r=30 -f lavfi -i sine -c:a aac -ar 48000 -b:a 64k -c:v libx264 -crf 18 -preset medium -tune zerolatency -pix_fmt yuv420p -f mpegts - > NUL3
All the presets are 'medium' now. And here are the outputs: [info] frame= 2222 fps= 25 q=17.0 size= 124402kB time=00:01:14.03 bitrate=13765.4kbits/s speed=0.835x [info] frame= 3441 fps= 19 q=18.0 size= 192778kB time=00:01:54.68 bitrate=13769.8kbits/s speed=0.631x [info] frame= 2632 fps= 17 q=18.0 size= 147456kB time=00:01:27.70 bitrate=13773.6kbits/s speed=0.582x Thanks for the note about tee muxer, I read that it can send output to multiple locations, but in my particular example I'm trying leverage a case when I have multiple sources to be streamed to different locations. The main question I have is - what if I want to stream to N different locations from one machine? If the quality of the output will be decreasing when each next process is starting, then it leaves me with running only one process on a machine? Sorry in case I'm missing something. Thanks -----Original Message----- From: ffmpeg-user <ffmpeg-user-boun...@ffmpeg.org> On Behalf Of Carl Eugen Hoyos Sent: Friday, March 12, 2021 9:59 AM To: FFmpeg user questions <ffmpeg-user@ffmpeg.org> Subject: Re: [FFmpeg-user] How to scale FFmpeg > Am 12.03.2021 um 08:27 schrieb <imalkev...@gmail.com> <imalkev...@gmail.com>: > > I'm trying to run the following command: When asking questions on this mailing list, please do not attach screenshots of your console output, instead post the command line you tested (without using the hidebanner option!) together with the complete, uncut console output. A few random comments: mpegts and mp4 are not the same things. You generally cannot request an FPS rate. When you use the x264 preset „slow“ do not expect it to work in real-time. There is a tee muxer and it is mentioned in the documentation. Carl Eugen _______________________________________________ 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".
