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• Live video ffmpeg latency using RTMP

  24 mars 2014, par bisc8

  I have a video stream that I want to broadcast via RTMP.

  I'm using ffmpeg to do so, with the following command :

  ffmpeg -i http://192.168.1.77:18000/stream.flv -c copy -f flv rtmp://localhost/myapp/mystream

  As far as I know, transcoding the video stream would introduce some latency. So my question is : is it possible that I am introducing latency in the output stream by using this ffmpeg command (copy) ?

  ---

  Side note :
  I'm trying to redirect my live video stream to a nginx-server in order to broadcast it (via RTMP) for several jwplayers. So far I got a delay of 1 second and some frames and I am wondering if it is possible to reduce it.

• Add movflags to top of mp4 file without using ffmpeg for a live RTSP stream

  15 avril 2021, par Nidheesh V

  Update :
I have a video player in browser which plays mp4 videos though websocket. The player only supports mp4 file. When i checked normal mp4 fiels does not play in the player, a mp4 file with a "moovflags faststart " will only play on that player. For a allready stored file , this will work properly.
But In case of an livestream(RTSP), using ffmpeg will only work once the RTSP connection has terminated since the "moovflags faststart " flags will work once a connection has terminated properly.
Hope the above statements makes more sense.
Due to this behavior, am checking if there is any way to get the moovflasg at first or something

  


  I am having RTSP live source and i need it to convert the RTSP to a mp4 file which has moov flags in the begining of the file.
I have checked with openrtsp to take a mp4 dump of the rtsp, but it only adds moov flags and other info on the footer of the mp4(onlky when openrtsp has closes the rtsp stream).
Ffmpeg has " -movflags faststart" to move the footer info to the header of the mp4 container.
Since i am having a RTSP live source, the video data will be comming back to back and there wont be any termination. The above ffmpeg command only works once the rtsp stream has terminated.

  


  Is there any way we can make a mp4 container which contains the mp4 footer info present in the header itself so that i can use it for a live source ?

  


  EDIT #1
I have video player which plays mp4 video files , it only support playback of a recorded mp4 file which is createtd using "-movflags faststart" , normal mp4 files does not play in that.
This is the player
https://github.com/sonysuqin/WasmVideoPlayer.
Since i am tryng to stream live video to the player, its not possible to use movflags faststart.

  


• ffmpeg:Unable to broadcast to live stream from webcam

  13 mai 2020, par gbenga ogunbule

  I have this code that I believe should be able to grab from webcam and broadcast a live stream i.e. Users will be able to watch or stream live what there admin is doing at that moment in time.

  



  I have this code for it

  



  C:\Apache24\htdocs\v­ideo\assets\ffmpeg\b­in>ffmpeg -f dshow -i video="HP Webcam" -c:v libx264 -preset ultrafast -tune zerolatency -r 10 -async 1 -c:a libmp3lame -b:a 24k -ar 22050 -bsf:v h264_mp4toannexb -maxrate 750k -bufsize 3000k -f mpegt s C:\Apache24\htdocs\v­ideo\assets\uploads\­videos\en.mp4


  



  Also notice I use the absolute path mpegt s C:\Apache24\htdocs\v­ideo\assets\uploads\­videos\en.mp4 instead localhost/video/assets/uploads/videos/en.mp4 and the reason is because, when I use the latter, it is recording the video into the folder where I run the command.

  



  And this is the HTML code I wrote for it.

  



  <video width="320" height="240" controls="controls">&#xA;  <source src="assets/uploads/videos/en.mp4" type="video/mp4">&#xA;Your browser does not support the video tag.&#xA;</source></video>&#xA;

  



  How do I online streaming using ffmpeg