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• Push RTSP over HTTP

  27 juin 2017, par Type11

  I need to make an emulator of cameras we have streaming to a video recording platform we created.

  The camera I am trying to emulate makes use of RTSP over http (well https but we can ignore that for now) which is somewhat normal but it doesn’t do the pull variety it does a push (we give the camera a url and it starts pushing to the video recording server).

  I have been using ffmpeg which has an rstp over http implementation but it is the pull kind where you take the client and give it a url to pull from.

  I have hacked around and gotten it to send an http GET as expected with the right headers we expect in it which our server uses and recognizes then it times out before streaming anything which makes sense as I think it is waiting for our server to send something.

  I could keep going down this path but I wanted to know if anyone else had run into this and if there was any prebuilt java, c, or c++ library that does anything like this I could start from ? I have searched around but most everything appears to be for a pull model.

  this is a capture of what the camera is sending (there is more but it is just more of the video stream below). this is the full tcp conversation.

  RTSP/1.0 200 OK
  Host : 192.168.1.9
  User-Agent : RS/E060660C84EB
  Content-Type : application/octet-stream
  X-SDP : 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
  X-Precapture : 8
  Authorization : Basic QXZ3R3VhbXpRcG15eUx3anlGYlZQS1ZCL2hoc1prWXltVVo0Q3cwb2FHaWZSWlBrNmhSRkVySFZoUkoxSG9lVjo2SWZTQ3VyYVRVT0FoU2RmVkJLdDBnQUFBQUFBQUFBQUFBQUFBQUFBQUFBaVNyTFFzK2tJNEVISVB5ZG9aL1Vu

  $...........}..|.....?.....a..@.P..    ..c.0.....<.>H ......Zas...AQZ...:.?W..A..q2..~.C..4.7....H’....*.....6 ?...........K.k.q...S.e+[g.......o... ..C1_[....N..........?.q.9.s..>..Gk.........[....&....n ;c..0c....#.A...9
  ......q...]...B...W.....8."....[..\c(..?Z.F !. 9. ..e...

  %..0.p2.h.0.,.'g.Rf.\s......@j. .....0.............H.V
.K{EL
M.ig..;i...PS..?..~HR..?ID>....T.Ie.m....
.....!..hBk..P-uX.V&...^<.ab....s....|.#.z...e..O+.{.!.0code>b..Q._d...z.......l.

  ...

  Any help on a library that might send a stream like this would be appreciated.

• Merge selected separate video's and put the variable into a ffmpeg merge command

  28 juin 2017, par Fearhunter

  I am using the following method to cut a stream in pieces and save mp4 files on my harddisk.

  Method :

   public Process SliceStream()
  
          {
  
              var url = model.Url;
  
              var cuttime = model.Cuttime;
  
              var output = model.OutputPath;
  
  
  
              return Process.Start(new ProcessStartInfo
  
                  {
  
                      FileName = "ffmpeg.exe",
  
                      Arguments = $"-i \"{url}\" -c copy -flags +global_header -f segment -segment_time \"{cuttime}\" -segment_format_options movflags=+faststart -reset_timestamps 1 \"{output}\"",
  
                      UseShellExecute = false,
  
                      RedirectStandardOutput = true
  
                  }); 
  
  
  
          }

  The var variables are the user’s inputs on the front-end. This method is working fine.

  Now I have the separate video files loaded in a list on the front end. I want to merge this videos files into one. I was looking to the following link :

  Concatenate two mp4 files using ffmpeg

  I see there a 3 ways to merge my seperate video files. What is the best way to merge my video’s ? I was thinking about to this scenario :

  1 : the user select te video’s he wants to merge
  2 : the user click on the button merge
  3 : this array variable I can use into the ffmpeg command in reverse order

  ffmpeg -i '{reversed array input}' -codec copy output

• How can I reencode a video to match another's codec exactly ?

  24 janvier 2020, par Stephen Schrauger

  When I’m on vacation, I usually use our camcorder to record videos. Since they’re all the same format, I can use ffmpeg to concat them into one large, smooth video without re-encoding.

  However, sometimes I will use a phone or other camera to record a video (if the camcorder ran out of space/battery or was left at a hotel).

  I’d like to determine the codec, framerate, etc used by my camcorder and use those parameters to convert the phone vidoes into the same format. That way, I will be able to concatonate all the videos without re-encoding the camcorder videos.

  Using ffprobe, I found my camcorder has this encoding :

    Input #0, mpegts, from 'camcorderfile.MTS':
  
    Duration: 00:00:09.54, start: 1.936367, bitrate: 24761 kb/s
  
    Program 1 
  
      Stream #0:0[0x1011]: Video: h264 (High) (HDPR / 0x52504448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
  
      Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080

  The phone (iPhone 5s) encoding is :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mov.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2017-01-02T03:04:05.000000Z
  
      com.apple.quicktime.location.ISO6709: +12.3456-789.0123+456.789/
  
      com.apple.quicktime.make: Apple
  
      com.apple.quicktime.model: iPhone 5s
  
      com.apple.quicktime.software: 10.2.1
  
      com.apple.quicktime.creationdate: 2017-01-02T03:04:05-0700
  
    Duration: 00:00:14.38, start: 0.000000, bitrate: 11940 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 11865 kb/s, 29.98 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
        encoder         : H.264
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
      Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
      Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler

  I’m presuming that ffmpeg will automatically take any acceptable video format, and that I only need to figure out the output settings. I think I need to use -s 1920x1080 and -pix_fmt yuv420p for the output, but what other flags do I need in order to make the phone video into the same encoding as the camcorder video ?

  Can I get some pointers as to how I can translate the ffprobe output into the flags I need to give to ffmpeg ?

  Edit : Added the entire Input #0 for both media files.