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• how to us google ML kit Selfie segmentation in flutter to overlay segmented user on top of chosen image or video ? [closed]

  4 avril 2024, par Amr

  I'm working on implementing a virtual background feature using the Google ML Kit selfie segmentation Flutter plugin. The goal is to separate the user from the background live from the camera feed, overlay the user on a chosen image or video, and then create a new video combining these elements.

  


  Currently, I'm successfully obtaining the mask using the plugin. However, I'm concerned about performance issues if I directly copy pixels to achieve the overlay effect, especially in real-time scenarios.

  


  I'm looking for alternative approaches or best practices to efficiently achieve this functionality without sacrificing performance. Any insights or suggestions on how to approach this would be greatly appreciated.

  


  I thought about using ffmpeg but not sure how to take the user pixels from the camera feed, I am not a flutter developer so not sure how to do so.

  


• Transloadit : How can I replace audio track of a given video ?

  1er septembre 2014, par Stan Wiechers

  I am having trouble forming the steps that would replace/set the audio track of an mp4. Here is my code :

   require "open-uri"
  
   transloadit = Transloadit.new(:key => ENV['TRANSLOADIT_AUTH_KEY'],:secret => ENV['TRANSLOADIT_AUTH_SECRET'])
  
   video_encode = transloadit.step('video_encode', '/video/encode', use: ":original",ffmpeg_stack: "v2.0.0", ffmpeg: { i: "http://www.stephaniequinn.com/Music/Allegro%20from%20Duet%20in%20C%...;", map:"1:0", vcodec:"copy", acodec:"copy"}) 
  
   store = transloadit.step('store', '/s3/store', :key => ENV['S3_ACCESS_KEY'], :secret => ENV['S3_SECRET_ACCESS_KEY'], :bucket => ENV['S3_BUCKET'])
  
   assembly = transloadit.assembly(:steps => [ video_encode, store ] )
  
   response = assembly.submit! open('http://techslides.com/demos/sample-videos/small.mp4')

  I am getting this message :

   'Unable to find a suitable output format'

  Could someone tell me how parametrize ffmpeg and transloadit to set the audio track of a given mp4 ? I tried many variations without any luck.

• How to tell from a media file if it's a video or an audio ? [duplicate]

  25 février 2021, par Random Name

  I have some files - audio and video files - stored in an aws s3 bucket, which can have different containers and stuff, and I would like to send them to the aws mediaConvert(MC). My issue is that I need to know whenever the file is an audio or a video file, because I need to configure the MC accordingly. The main app on the server is php based, but this information might not be that interesting.

  


  I have ffmpeg, and I already use ffprobe to get the file duration, however I can't tell from the returning data if it's a video or audio-only file. And in an another question someone said that maybe I can get this info by using the ffmpeg, but as far as I know that requires me to download the file from the s3 to the server.
There is also an s3 function that I can use to get the header of a specific object, which contains the mime type of the file, however this sometimes returns as audio/mpeg for video files, which then configures the MC incorrectly.

  


  I could also check the error message from the first job create of MC, which then tells me about the issue, and I can resend the file with the correct configuration, but then the job is marked as failed with error, which doesn't feel right to do.

  


  So my question is ; what would be the best approach to tell from a media file if it's a video or audio only ? It's possible that ffmpeg or ffprobe can do it remotely, but I just don't know the tools deeply enough, so I'm not entirely sure that it can only work in that way I described it.