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• Recorded & uploaded video from iphone device won't play in iphone

  11 juin 2019, par Sohil Chamadia

  I am facing an issue regarding :

  Recording video from iphone and uploading that video on my application(Develop in Wordpress Framework) then the video uploaded won’t play in iphone devices.

  This issue occurs only when I "Record video from iphone and then uploading that video into the application".If I upload existing video from iphone device then video will be played and it’s working fine. So please help to resolve this issue.I have used "FFmpeg library" to reduce the size of video.

  Below is the code which i have used to play video :

  <video preload="auto" width="320" height="240" controls=""><source src="abc.mp4" type="video/mp4">Your browser does not support the video tag.</source></video>

  When i click on video to play it then video is not play and cross sign is shown over the play button.Below i have attached screenshot of it :
  

• ffmpeg take screenshots from mp4 at specific frames

  7 mars 2024, par GhostOrder

  I want to store some frames from an mp4 as jpg files, I should be able to specify which frames I want, all this in one command line.

  


  Looking in SO I found this answer, it seems to be the way but in my case it is storing just one frame, this is my command which is almost the same as the linked answer :

  


  ffmpeg -i <mp4 that="that" contains="contains" video="video" stream="stream"> \&#xA; -vf select=&#x27;eq(n\,0)&#x2B;eq(n\,94740)&#x2B;eq(n\,297570)&#x2B;eq(n\,507570)&#x2B;eq(n\,728970)&#x2B;eq(n\,947460)\eq(n\,1116420)&#x27;\&#xA; -fps_mode:0 vfr ./ss_%02d.jpg&#xA;</mp4>

  


  So the frames I want to store as jpg's are : 0, 94740, 297570 and so on, but ffmpeg only saves the first one (the frame 0), this is the response I always get (I removed the default ffmpeg output part for brevity but I can add it if you think is necessary) :

  


  frame=    1 fps=0.4 q=4.9 Lsize=N/A time=00:00:01.66 bitrate=N/A speed=0.65x


  


  the video have a duration of 00:11:40.97 and I've calculated those frames using the formula

  


  (minutes * 60 + seconds) * frame rate (which is 30).


  


  What I'm missing here ?

  


• @ffmpeg/ffmpeg : Uncaught (in promise) ReferenceError : SharedArrayBuffer is not defined

  19 mai 2022, par Flobbinhood

  I have a small react app with a node.js backend (monorepo). The client is using @ffmpeg/ffmpeg, and all works fine locally, but when deployed to Heroku I'm getting the error ReferenceError: SharedArrayBuffer is not defined. This happens when I run ffmpeg.load(). Note that I am only using ffmpeg on the client in the React app.

  


  What I have done so far :

  


  

  • Ensured that my deployed app is using https

  


  • Added these lines in setupProxy.js in app.use (located in the client directory). See this answer for context

  


  


  response.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
response.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');


  


  

  • Registered for an origin trial with chrome. This actually worked, but I'd prefer a more permanent solution that works across browsers.

  


  • Tested debugging crossOriginIsolated, and verifying that it is true locally but false on my deployed site.

  


  


  It seems like something is wrong with my Cross-Origin config, or maybe it's just not being applied. Any help would be appreciated.