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• ffmpeg stream : only video, no audio (twitch livestream)

  24 mai 2023, par Sam Leurs

  I have the following ffmpeg command in node.js to stream to a twitch livestream.

  


  Please note that the code is simplified.

  


  const ffmpeg = require('ffmpeg-static');

const cmd = `${ffmpeg} \
-stream_loop -1 \
-re \
-f mp4 \
-i ${argv.v} \
-stream_loop -1 \
-re \
-f mp3 \
-i ${argv.a} \
-c:a libmp3lame \
-c:v libx264 \
-b:a 128k \
-b:v 4500k \
-ar 44100 \
-ac 2 \
-preset veryfast \
-pix_fmt yuv420p \
-f flv ${url}`;

const stream = exec(cmd);


  


  It's an mp4-file of 5 seconds and an mp3-file of 15 minutes. It should be an infinite stream.

  


  The video works and is looped as expected, but the audio isn't playing. If I add the audio directly to the video (with a video editor) and stream the file, the audio at twitch works.

  


  I had it working a few hours ago but after changing the command it does not work anymore. I was thinking I was blocked by twitch. It's a royalty free number generated by AI, so not a known pop song which could be blocked by twitch (if that's even possible).

  


  Does someone know the solution ?

  


• ffmpeg copy video in video with a specific time

  13 février 2017, par Alkl

  Im new in this topic (beginner) and Im german... So it’s a bit difficult to find the correct words...

  I’ll try to explain what I’ve done and what I want to do :

  1. Extract video area from the original video converted in PRORES codec :

     ffmpeg.exe -i test.mkv -ss 00:06:21.99 -t 00:00:01.94 -async 1 -strict -2 -c:v prores_ks -pix_fmt yuva444p10le -profile:v 4444 -bits_per_mb 8000 -s 1920x1080 cut_video.mov

  2. Edit the cut in After Effects

  3. Convert the PRORES in Matroska

     ffmpeg.exe -i "C :\Users\Alex\Desktop\ffmpeg-20170202-08b0981-win64-static\bin\cut_video\cut_video.mov" -vcodec ffv1 -acodec pcm_s16le temp.mkv

  4. Replace the video area in the originale video file at the time 00:06:21.99...

  I spend 4 hours for the two commands...
  So I despair at the fourth step. Is it possible ? Can you help me ?

  I made a picture, so you can understand better what Im doing... : http://i.imgur.com/HqlNxzW.jpg

  Best regards from germany,

  Alex

• RTSP to RTMP using FFMPEG on Raspberry Pi to YouTube Livestream ends prematurely (and sometimes doesn't start)

  12 mars 2021, par user203875

  I have been running a program from my raspberry pi 4 that converts a RTSP network camera feed to RTMP for YouTube. The stream used to run non-stop every day. I didn't have to do anything. I have a program in place that would restart if the feed died.

  


  Nothing has changed with that program in 2 years. About a month ago, the feed stopped working. I just started into trying to figure out why. Maybe someone has some ideas on what is going on ?

  


  In order for me to start the feed, I must also start a studio.youtube.com browser session showing the feed information. If that web page is up and running, the live stream will start. While I can't say for certain that it NEVER starts without this session running, it seems that way.

  


  Usually the stream lasts for an hour or two. Rarely more than four hours.

  


  When I start up a studio.youtube.com session after the stream dies the "Dimiss" or "Edit in Studio" message is on the page. I have to hit "dismiss" before I can start up the stream again.

  


  Is there a solution to this ?

  


  Again, my program didn't change, so I'm at a loss for what I can do to fix this.