Recherche avancée

Sur d’autres sites (10641)

• FFMPEG works too slowly

  11 avril 2015, par Niklas Tampier Holmgren

  i’m currently working on a visual studio c++ project, now i must receive an stream from a Raspberry pi, i’m actually using ffmpeg, the problem is it works to slow in computer side, here is the code i’m using in rapsberry pi :

  ffserver -f /etc/ffserver.conf & ffmpeg -v 2 -r 20 -s 640x480 -f v4l2 -i /dev/video0 http://localhost:8090/webcam.ffm

  and in computer side :

  void Display(){
  
  
  
  
  
  //open the video stream and make sure it's opened
  
  if (!cap.open(videoStreamAddress)) {
  
      std::cout << "Error opening video stream or file" << std::endl;
  
  
  
  }
  
  
  
  
  
  for (;;) {
  
      if (!cap.read(frame)) {
  
          std::cout << "No frame" << std::endl;
  
          cv::waitKey(1);
  
      }
  
      cv::imshow("Output Window", frame);
  
      if (cv::waitKey(1) >= 0) break;
  
  }

  }

  Any idea what could be happens ? i have a good Ethernet connection (i’m using it to stream)

• Stream MP4 using FFMPEG on remote VLC

  8 novembre 2016, par Satish

  I’m trying to stream a MP4 file from my Embedded device and play it in the VLC in my laptop. My H/W setup look like below

  --------------                ------------------      
  
  |  Board     |     Ethernet   | Window Laptop  |
  
  | (Android N)|----------------|     VLC        | 
  
  | 192.168.1.5|                |  192.168.1.2   |  
  
  |   ffmpeg   |                |----------------|
  
  |------------|  

  I’m trying to issue ffmpeg command from board side and it look like below

  Embedded board ---
  ./ffmpeg -re -i vid.mp4 -vcodec copy -an -f rtp rtp ://192.168.1.2:1234 -vn -acodec copy -f rtp rtp ://192.168.1.2:1234

  On Laptop VLC side my sdp file look like below

  v=0
  
  o=- 453271780569021 453271780586833 IN IP4 /192.168.1.5
  
  s=Unnamed
  
  i=N/A
  
  c=IN IP4 /192.168.1.2
  
  t=0 0
  
  a=recvonly
  
  m=video 1234 RTP/AVP 96
  
  a=rtpmap:96 H264/90000

  I don’t see any stream on VLC side. I believe there is something wrong command which I couldn’t figured yet. Please let me know if anyone knows how I can achieve this. By the way the video file is not limited to MP4 format , i’m open for any file format.

  Thanks, Satish

• FFmpeg - H264 encoder could not find a valid device and can't configure encoder in openwrt

  2 avril 2023, par Sajid Ehsan

  i have configured openwrt in raspberry pi 3 b+. ip camera is connected with raspberry pi via ethernet . i am trying to record it streaming in filesystem of raspberry pi. for that i installed ffmpeg in openwrt. and used this command :

  


  ffmpeg -i rtsp://${username}:${password}@${ip}/0/av0 -c:a aac -c:v copy -map 0 -f segment -strftime 1 -segment_time 300 -segment_format mp4 -reset_timestamps 1 "/recordings/file.mp4"


  


  but i am getting this error :

  


  [h264_v4l2m2m @ 0x444410] Could not find a valid device 
[h264_v4l2m2m @ 0x444410] can't configure decoder
[rtsp @ 0x7fb796d320] Failed to open codec in avformat_find_stream_info 
[h264_v4l2m2m @ 0x444410] Could not find a valid device 
[h264_v4l2m2m @ 0x444410] can't configure decoder


  


  how i can fix this error