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• FFMPEG - Watermark in Random Position

  13 octobre 2018, par gbvisconti

  I need to make a watermark in my video with the following loop :

  1. Appear in a random position on the video.
  2. Fade out after 3 seconds.
  3. Appear again after random seconds.

  I have read documentation and also found a forum with similar solution, that is almost what I need.

  ffmpeg -i video.mp4 -c:v libx264 -preset veryfast -crf 23 -tune zerolatency -vendor ap10 -pix_fmt yuv420p -filter:v drawtext=fontfile=arial.ttf:text='WatermarkTextHere':fontcolor=black@0.5:fontsize=16:x=if(eq(mod(n\,200)\,0)\,sin(random(1))*w\,x):y=if(eq(mod(n\,200)\,0)\,sin(random(1))*h\,y) -c:a copy outvideo2.mp4

  I don’t know how to adapt correctly yet.

  EDIT

  After some hours I managed to get this. It fades in and out, but is not really random. The logo.png only appears mostly in upper left area of the video. How to make it appear more random in any area of the video ?

  ffmpeg -i input.mp4 -loop 1 -i logo.png -filter_complex "[1]trim=0:30,fade=in:st=0:d=1:alpha=1,fade=out:st=9:d=1:alpha=1,loop=999:750:0,setpts=N/25/TB[w];[0][w]overlay=shortest=1:x=if(eq(mod(n\,200)\,0)\,sin(random(1))*w\,x):y=if(eq(mod(n\,200)\,0)\,sin(random(1))*h\,y)" output.mp4

• Powershell Job Memory Consumption Issue

  14 juillet 2016, par Matt Wall

  I’ve been struggling with this for a week now and have exhausted all the methods and options I have found online. I am hoping someone here will be able to help me out with this.

  I am using powershell to start 8 jobs, each job running FFmpeg to stream a 7 minute file to a remote RTMP server. This is pulling from a file on the disk and each job uses a different file. The command is in a do while loop so that it is constantly restreaming.

  This is causing the shell I launched the jobs from to accumulate a massive amount of memory, consuming all that it can. In 24 hours it consumed 30 of the 32 GB of my server.

  Here is my launch code, any help would be appreciated.

  start-job -Name v6 -scriptblock {
  
  do { $d = $true; $f = Invoke-Expression -Command "ffmpeg -re -i `"C:\Shares\Matthew\180p_3000k.mp4`" -vcodec copy -acodec copy -f flv -y rtmp://<ip>/<appname>/<streamname>"; $f = $null }
  
  while ($d = $true)
  
  </streamname></appname></ip>

  }

  I’ve tried to receive the jobs and pipe it to out-null, I’ve tried setting $f to $null before starting the do while loop, and some other things I found online but to no avail. Thanks everyone for your time !

• ffmpeg muxing after 1,5hours overhead libtwolame mpegts

  19 février 2024, par destmaster

  Im' running ffmpeg to encode live audio and send through spi interface using these command :

  


  ffmpeg -y -hide_banner -nostats -thread_queue_size 1024 -i /tmp/inpipe -osr 48000 -c:a libtwolame -b:a 160k -minrate 160k -maxrate 160k -bufsize 160k -mode stereo -mpegts_transport_stream_id 1 -mpegts_original_network_id 1 -mpegts_service_id 1 -mpegts_service_type digital_radio -pcr_period 20 -metadata service_name="-" -metadata service_provider="-" -mpegts_start_pid 769 -mpegts_pmt_start_pid 257 -muxrate 256k -mpegts_flags 'system_b' -mpegts_flags 'nit' -f mpegts pipe:1 | cat > /dev/spidev4.0


  


  After about 1,5 hours I obtain these error and ffmpeg stops to work

  


  size=  174763kB time=01:33:12.39 bitrate= 256.0kbits/s speed=   1x    
video:0kB audio:109227kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 59.999962%


  


  I'm obtain the error always after the same amount of time and size. What can be the reason ?