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• ffmpeg showwaves - Change color of waveform on top of an image

  15 août 2020, par Grant SYNKOP

  I need help with ffmpeg.

  



  I wrote this code :

  



  @echo off  
for %%F in (*.opus *.ogg) do 
(  
  ffmpeg -y -i "%%F" -loop 1 -i "default.jpg" -filter_complex " 
 [0:a]showwaves=s=2560x1440:mode=cline:r=30,colorkey=0x000000:0.01:0.1,format=yuva420p[v];
[1:v][v]overlay[outv]" -map "[outv]" -pix_fmt yuv420p -map 0:a -vcodec libvpx-vp9 -lossless 1 -speed 8 -acodec copy -shortest "%%~nF.webm" 
)


  



  What it does is that for each .opus or .ogg audio file, it'll output a video with a default.jpg background image (which is completely white) and a waveform on top of it, with the audio playing.
Problem is, I would change the color of the waveform to black, but I don't understand how colorkey works even after reading the documentation...

  



  Basically, I want to obtain something like this (but the waveform being in black) : https://www.youtube.com/watch?v=k9arneFijG8

  



  Thanks in advance.

  


• How to get Continuous live streaming without buffering in azure media player using FFMPEG(Latency is not a issue) ?

  29 août 2019, par vinay

  I am streaming from the ip camera which uses RTSP protocol and ingesting the feed to RTMP(to Azure media server) using the following command

  ffmpeg command : ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp ://CloudAppUser:admin@192.168.8.145/MediaInput/h264/stream_1 -vcodec libx264 -t 12:00:00 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp ://channel1-cloudstream-inso.channel.media.azure.net:1934/live/980b582afc12e421b85b4jifd8e8662b/df

  I am able to watch the stream but it is buffering once in every 30 seconds , and I want to know the reason behind this buffering

  Please any one change this command , so that it should not buffer

  I am executing this command from my terminal

  I would like to watch my live stream in azure media player without any buffering and latency below 1 minute is not an issue

• How to run ffmpeg command from the client side ?

  12 janvier 2017, par Debraj Biswas

  I am trying to make an online examination portal. When students start the exam, their webcam will start automatically and record the stream live and store in the server. Invigilators will either watch the students live or they can watch the saved live streams later.

  After many research on various technologies I came across this link. It uses Node JS with websockets and ffmpeg. I ran the ffmpeg command and it streamed the live video successfully.

  But the problem is, in order to live stream, the students have to have ffmpeg installed in their system and they should run the command directly from the terminal. So how can I change this ? The students will live stream from their browser, because this is a web portal. If we put this command in a PHP script, then the command will run at the server side. But client side command should run in this case. How can I run command from client side ?

  Any suggestions will be helpful.