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• FFMPEG - Streaming GoPro4 to RSTP

  20 mai 2017, par Winged

  Greeting !
  I’m planning to capture a realtime streaming video from GoPro4 and load it into TouchDesigner in order to use this footage in a projection mapping project.

  So far I was able to play GoPro4 stream using ffplay doing as follows :
  1. Host GoPro4 WiFi hotspot.
  2. Connect a laptop WiFi to GoPro4’s hotspot.
  3. Restart GoPro stream service by opening ’http://10.5.5.9/gp/gpControl/execute?p1=gpStream&c1=restart’ in s browser.
  4. Run ffplay command in order to open ffplay stream video window : ’ffplay -an -fflags nobuffer -f:v mpegts -probesize 8192 rtp ://10.5.5.9:8554’

  The next step I opt to make it to re-stream this signal into RTSP protocol so TouchDesigner could receive this signal.

  And here is my question - how to re-stream this input to RTSP ?

• Can ffmpeg resume reading from a pipe after interruption ?

  30 juin 2017, par T Kilney

  I couldn’t decide whether this was superuser, SO or video production so my apologies if you think I got it wrong.

  I’ve got a number of different video streams from various inputs on the computer (some are via WiFi, some RTMP etc) and I have got them all transcoded into raw h264 frames.

  Now I want to output them to an RTMP stream. For example, I will set camera1 to output to a named pipe called CAM01. I can get ffmpeg to read from the pipe, but the problem comes when I want to switch cameras. I was hoping that killing the camera1 output to the pipe, and then starting a new process that output camera2 to the same CAM01 pipe would let ffmpeg pick up the stream, however it hangs on the last frame it received before I killed the first camera.

  However, if camera1’s output is interrupted for some reason (say, the wireless connection to it drops out) then FFmpeg has no problem picking up the stream when the picture comes back.

  Basically, is there a way to get ffmpeg to keep reading from the pipe even when it’s temporarily interrupted, or is what I’m trying to do simply not possible this way ?

  I’m a bit of a noob with named pipes, so please excuse my potential ignorance.
  The command I’m currently using (note that for now it generates audio because I haven’t got audio sorted yet)

  ffmpeg -re -ar 44100 -ac 2 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero -f h264 -i CAM01 -vcodec copy -acodec aac -ab 128k -g 120 -strict experimental -f flv "my_rtmp_URL"

  If it matters, the CAM01 pipe basically just contains raw h264 frames (like you get out of raspivid)

  TIA !

  EDIT : Forgot to say, I’m on Linux Mint

• Stream RTSP from ONVIF general camera to Youtube

  4 septembre 2017, par Samul

  I have a wifi camera that uses RTSP/ONVIF protocol and after reading FFMPEG docs and some threads at Google I am trying to broadcast the stream to Youtube. So I started a broadcast at youtube and in my computer in ffmpeg I executed this command :

  ffmpeg -f lavfi -i anullsrc -rtsp_transport udp -i rtsp://200.193.21.176:6002/onvif1 -tune zerolatency -vcodec libx264 -t 12:00:00 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://x.rtmp.youtube.com/live2/private_key

  The command above looks like it’s correct cause it ouputs constantly something like this :

  

  The problem is that at YOUTUBE it still says I am offline. Why ?