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• (FFMPEG Error)Real-time buffer [USB cam's name] too full or near too full

  9 juin 2020, par ZzangWoo

  I am doing project about making rtsp stream of my USB Camera.
And my project environment is 
- OS : windows server 2019
- CPU : AMD Ryzen 7 3700X
- RAM : 64GB
- GPU : NVIDIA GeForce RTX 2070 SUPER

  



  My project goal is to detect object with YOLO and show original cam video, detected video to client. So I need to change my USB Camera to RTSP Stream. But I had an error below picture.
enter image description here

  



  And this is my command line.

  



  ffmpeg -re -f dshow -i video="JOYTRON HD20" -pix_fmt yuv420p -vsync 1 -threads 0 -vcodec libx264 -r 30 -g 60 -sc_threshold 0 -b:v 640k -bufsize 768k -maxrate 800k -preset veryfast -profile:v baseline -tune film -acodec aac -b:a 128k -ac 2 -ar 48000 -f rtsp rtsp ://localhost:8888/test

  



  I saw an answer that the problem is bandwidth. So I added parameter. It didnt help.

  



  I also added the -rtbufsize parameter and -thread_queue_size parameter. But it didnt help anything.

  



  What should I do ??

  


• Streaming Web cam real-time buffer [Toshiba Webcam] [video input] too full or near too full

  21 avril 2015, par esprittn

  I am trying to stream my webcam with audio from microphone of laptop(OS : windows 7 ) to nginx server (Compiled with rtmp module in CentOS 6.6 final) in same local network.
  From my laptop, I execute this command in CMD :

  ffmpeg -f dshow -i video="Toshiba Webcam" -f dshow -i audio="Microphone (Périphérique High D" -vf scale=1280:720 -vcodec libx264 -r 60.97 -acodec libvo_aacenc -ac 2 -ar 44100 -ab 128 -pix_fmt yuv420p -tune zerolatency -preset ultrafast -f flv "rtmp://172.16.40.162/dash/test"

  But I got this message :
  

  And I had about retard delay of 23 second when I open http://localhost:8080 ( I made the indx.html file of nginx with JWPlayer)

  So my questions are :

  How can I improve the ffmpeg cmd to avoid the errors of buffer too full ?

  How eliminate or reduce the latency ?

  Thanks for your help.

• What it the expected behavior when using the input Framerate option (in FFmpeg) when the input is a real-time camera device ?

  28 août 2023, par J.M.

  As far as I know, the use of the Framerate option should be used only on an input files (like sequence of images or perhaps a video file that don't have a defined PTS).

  



  However, if I run the command below on my web-cam, the video still streams fine (at least for a few hours from what I've checked till now). Why is that still works ? Should I expect that something will get wrong ? (maybe later, after a few hours or days of streaming)

  



  ffmpeg -framerate 30 -f v4l2 -copyts -i /dev/video0 -c:v libx264 -r 30 -f mpegts udp://192.168.10.199:1234


  



  EDIT :

  



  After running some more tests, it seems that when I'm running the command like this, the steam get stuck after a few hours :

  



  ffmpeg -framerate 30 -f v4l2 -copyts -i /dev/video0 -c:v libx264 -r 30 -f mpegts udp://192.168.10.199:1234


  



  However, if I run the command like this, it runs for days :

  



  ffmpeg -r 30 -f v4l2 -copyts -i /dev/video0 -c:v libx264 -r 30 -f mpegts udp://192.168.10.199:1234


  



  But I don't understand why...