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• FFmpeg youtube livestreaming [closed]

  23 janvier 2024, par T1WT

  I'm developing a project for streaming on YouTube. I use Python + ffpeg in the code. I haven’t been able to fix the problem for a month now - after a while (from 6 to 20 hours) buffering begins. In the command I use -c copy. But after this time, I came to the conclusion that most likely the buffering (namely, the stream gradually drops from speed x1 to speed x0.9 and below) is due to the disk. My server has SATA. Moreover, the problem is that the disk reaches 100% active time. And around this time the flow speed begins to drop. Moreover, the total read/write speed is only 20MB/sec. How to fix it ? Thanks for your help, I really can't stand it anymore.

  


  I’ll say right away that the potential of the project is great, now there are only 50 streams on YouTube, but then there may be more than 10,000.

  


  I tried a lot but settled on the SATA drive and

  


• Chess game video generator

  11 septembre 2017, par samara-casa

  I don’t have a specific technical question, I rather would like to hear advices on how to come around so the task will be implemented in the most elegant way.
  Can’t think on a solution that will satisfy me in terms of "elegance".

  I would like to create automatic video generator of chess games.
  You give it the moves in PGN format, maybe some configurable options as seconds between moves or audio track and it will eventually output a video file of the game.

  What is the correct way to get into it ? Is there software or tools that can help me with this ? What libraries to use ? Ideas ?

• Record audio from specific Xvfb session on Centos

  18 août 2017, par boygiandi

  I’m trying to record audio from firefox in a Xvfb session. I installed pulseaudio server and I can record audio. But when I have more than 1 Xvfb session, the audio get mixed. How can I start 2 ffmpeg process and record 2 Xvfb sessions separate ?

  The ffmpeg command look like this

  ffmpeg -f pulse -i default -r 30 -framerate 5 -f x11grab -i :xxx -c:v libx264 -x264-params keyint=60 -bufsize 500k -c:a aac -ar 44100 -b:a 128k -f flv ...

  Then I tried to create virtual audio device

  pacmd load-module module-null-sink sink_name=MySink

  pacmd load-module module-loopback sink=MySink

  Set this device as default input/output audio

  pacmd set-default-source "MySink.monitor"

  pacmd set-default-sink "MySink"

  I hope that when I start Xvfb session + firefox, it’ll play audio on this device as default and ffmpeg’ll also get audio from there. The ffmpeg command now become

  ffmpeg -f pulse -i MySink.monitor -r 30 -framerate 5 -f x11grab -i :xxx -c:v libx264 -x264-params keyint=60 -bufsize 500k -c:a aac -ar 44100 -b:a 128k -f flv ...

  But what I get is noise or ffmpeg error 100 buffers queued in out_0_1, something may be wrong. What did I do wrong ?

  And as I know, firefox 54 doesn’t support alsa anymore, so we only can use pulseaudio.