Recherche avancée

Sur d’autres sites (11085)

• error - lottie to mp4 using puppeteer-lottie

  24 mars 2020, par Christian Lopez

  I have installed puppeteer-lottie and ffmpeg, but when I trying to use the await renderLottie function I got an error on the terminal "UnhandledPromiseRejectionWarning : ArgumentError : Expected number fps to be positive, got 0"

  here is how I use puppeteer :

  app.get("/video", (req, res) => {
  
  
  
    async function start() {
  
      await renderLottie({
  
          path: 'public/newData.json',
  
          output: 'public/example.mp4',
  
          height: 1920
  
        });
  
      }
  
    start();
  
  
  
    res.send("donwload your video");
  
  });

  this is the error :

  (node:3464) UnhandledPromiseRejectionWarning: ArgumentError: Expected number `fps` to be positive, got 0

  any suggestions ?

• Output file not specified [closed]

  16 mai 2024, par Rich Madrid

  I have been messing around with ffmpeg working on basic mkv to mp4 conversions the last couple of days on my Mac and Windows computers. Mac was easier buy my windows desktop has a much faster OS so I wanted to do some conversions on it tonight. Got ffmpeg installed and working.

  


  After having some issues with the command prompt not finding the directory, I solved that with the following basic code to convert an mkv file to an mp4 for me :

  


  ffmpeg -i "C:\Users\Computer\videos\decade.mkv" "C:\Users\Computer\Videos\RJ videos\Complete\decade.mp4"


  


  I moved on to wanting to scale up an mkv to 1080p and use a yadif filter. I couldn’t find an adequate way to do this so I used a portion of the command that worked on my Mac last night, and stuffed it into the command for windows and I got an error code “at least one output file must be specified” after using the following command :

  


  ffmpeg -i "C:\Users\Computer\videos\decade.mkv" -vf "yadif=1,scale=1440x1080:flags=lanczos,setsar=1" -c:v libx264 -crf 21
-c:a aac -b:a 128k -ar 48k "C:\Users\Computer\Videos\RJ videos\Complete\decade.mp4"


  


  What am I doing wrong ?

  


• How to stream an image during specific seconds with ffmpeg ?

  14 juillet 2021, par Alex Rypun

  I need to stream an image to RTMP destination for 20 seconds.
I use AWS medialive + mediapackage for streaming.
I'm trying to do it using different framerates (-r) by command :

  


  ffmpeg -loop 1 -r 30 -t 20 -i ./stream_stub.jpg -vcodec libx264 -f flv rtmp://mystream


  


  but the real stream time is from 8 to 14 seconds (depending on framerate).

  


  If I create a video file the duration is 20 seconds (as expected) regardless of framerate :

  


  ffmpeg -loop 1 -r 30 -t 20 -i ./stream_stub.jpg -vcodec libx264 -f flv out.mp4


  


  But for live streaming, I can't reach the expected behavior.

  


  What I'm doing wrong ? And what framerate should I use for a single still image (as I understand 1 fps should be ok) ?