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• How to convert date format of text in m3u8 file ? [closed]

  30 décembre 2020, par Rekabet Kurumu

  I have a Flussonic media server. I'm transcoding RTMP into HLS and must edit the M3U8 file.

  


  Problem :
How to change the date part of a name in segments of an .m3u8 file ?

  


  If stream name is "sample" output will be foo.com/stream.m3u8 this is perfect. but inside m3u8 file outout looking like this

  


  #EXTM3U
#EXT-X-TARGETDURATION:5
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:20633
#EXT-X-PROGRAM-DATE-TIME:2020-12-30T11:15:07Z
#EXTINF:5.000,
2020/12/30/11/15/07-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9
#EXTINF:5.000,
2020/12/30/11/15/12-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9
#EXTINF:5.000,
2020/12/30/11/15/17-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9


  


  output lookin 2020/12/30/11/15/ like this. i want this part will be microtime or time.

  


  For example :

  


  1609326905-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9
1609327050-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9
1609329450-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9


  


  is it possible ?

  


• ffplay : how does it calculate the fps for playback ?

  21 octobre 2020, par Daniel

  I'm trying to playback a live media (h264) which is produced by a hardware encoder.

  


  The actual desired FPS on the encoder is set to 20, and when checking the logs of the encoder it prints "FPS statistics" every minute :

  


  2020-10-21 17:26:54.787 [  info] video_stream_thread(),video chn 0, fps: 19.989270
2020-10-21 17:27:54.836 [  info] video_stream_thread(),video chn 0, fps: 19.989270
2020-10-21 17:28:54.837 [  info] video_stream_thread(),video chn 0, fps: 20.005924
2020-10-21 17:29:54.837 [  info] video_stream_thread(),video chn 0, fps: 19.989270
2020-10-21 17:30:54.888 [  info] video_stream_thread(),video chn 0, fps: 19.989274
2020-10-21 17:31:54.918 [  info] video_stream_thread(),video chn 0, fps: 19.989264


  


  You can see it's varying, but not too much around 20.

  


  Question1 : Is this normal ? Or it should be exactly 20 every time ? To avoid confusion : I'd like to know if by the standard of H264, can this be accepted as a valid stream or this violates some
rule ?

  


  I'm trying to playback this stream with ffplay :

  


  $ ffplay rtsp://this_stream
Input #0, rtsp, from 'xyz'
  Metadata:
    title           : 
    comment         : substream
  Duration: N/A, start: 0.040000, bitrate: N/A
    Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 640x360, 25 fps, 25 tbr, 90k tbn, 180k tbc


  


  The thing is that ffplay thinks this is a stream with 25fps. And it also plays 25 frames each sec, causing the stream to stall and buffer in every few seconds.

  


  I believe the fps is calculated by some pts/dts values in the stream itself, and it's not hardcoded. Am I wrong here ?

  


  If I'm not wrong, why does ffplay thinks this stream runs at 25fps, whereas it only runs at (around) 20 ?

  


• Delay and quality drop in video streaming

  14 mai 2018, par user61455

  I have simple program :

  #include <iostream>                                                          
  
  #include <opencv2></opencv2>opencv.hpp>                                                
  
  #include <vector>                                      
  
  using namespace cv;                                                          
  
  int main() {                                                                 
  
      VideoCapture cap(0);
  
      Mat frame;                                                               
  
      std::ios::sync_with_stdio(false);                                        
  
      while (cap.read(frame)) {                                                
  
          for (size_t i = 0; i &lt; frame.dataend - frame.datastart; i++) 
  
             std::cout &lt;&lt; frame.data[i];                                   
  
      }                                                                        
  
      return 0;                                                                
  
  }
  
  </vector></iostream>

  And I am streaming the images using following command :

  ./a.out | ffmpeg -f rawvideo -pixel_format bgr24 -video_size 1280x720 -re -framerate 10 -i - -b:v 1M -f flv rtmp://127.0.0.1:8080/instream/stream

  In client PC I am seeing the video as follows :

  ffplay rtmp://x.x.x.x:8080/instream/stream

  My aim is to see the live feed from the camera on client PC. But on client PC there is an delay of 3 seconds and the quality of the video is also bad. Also there is frame drop. What could be the reason for the same ?