Recherche avancée

Sur d’autres sites (12602)

• download video fragment by size usnig ffmpeg

  6 mars 2023, par Ivan Dobryaev

  Suppose I have some video url. I want to download video fragment by size (equal time intervals may have different sizes).

  


  I have some different ways :

  


  


  1. The best one. Get list of start and finish time points for each fragment (without download full video). For example : [(0, 15, 10Mb), (15, 40, 10Mb), etc]

     


  


  2. Parallel download each fragment with size 10Mb

     


  


  


• How to upload a transcoded file to s3 and create a link to download it

  23 août 2016, par Dotun Longe

  I want to download a video after my module "creates" it by combining a picture and audio file. The output goes to my tmp folder. This works, but I don’t know how to access it.

  My method is to create another Paperclip attachment called "converted" and the module responsible for transcoding should also be responsible for uploading the converted video to a bucket, where I can then access it via @upload.converted.url.

  I have no idea how to go about this, and my eyes hurt from searching. If you have a better way for me to be able to download the transcoded video without this option, I will be open to it.

  Module -> videocreatingproccessor.rb :

   require 'streamio-ffmpeg'
  
   require 'fileutils'
  
  
  
   module VideoCreatingProcessor
  
  
  
   def self.convert_to_video (path_to_audio_file, path_to_image_file)
  
   movie = FFMPEG::Movie.new(path_to_audio_file)
  
   options = {video_codec: "libx264", frame_rate: 60, resolution: "960x720",
  
         x264_vprofile: "high", x264_preset: "slow", pixel_format: "720p",
  
         audio_codec: "libfaac", audio_bitrate: 32, audio_sample_rate: 44100, audio_channels: 2,
  
         threads: 2}
  
    woptions = { watermark: path_to_image_file, resolution: "960x720", watermark_filter: { padding_x: 10, padding_y: 10 } }
  
  
  
   movie.transcode("tmp/output.mp4",woptions ,options )
  
   end

  uploads_controller.rb :

   class UploadsController < ApplicationController
  
   before_action :set_upload, only: [:show, :edit, :update, :destroy]
  
  
  
   def index
  
   @uploads = Upload.all
  
   end
  
  
  
   def paudioaddress
  
   "https:" + @upload.audio.url
  
   end
  
  
  
   def pimageaddress
  
   "https:" + @upload.image.url
  
    end
  
  
  
    def show
  
    require "video_creating_processor"
  
    newvideo =    VideoCreatingProcessor.convert_to_video(paudioaddress,pimageaddress)
  
    end
  
  
  
    ....
  
    end

• How to download .m3u8 parts separately ?

  21 mars 2023, par Jon Freynik

  My google skills are failing me this morning - I can only seem to find how to download the full .m3u8 listings file.

  


  Using the following ffmpeg command works to download and concat all the video files into 1.

  


  ffmpeg -i "http://example.com/chunklist.m3u8" -codec copy file.ts

  


  Is there a similar command to download each chunk separately ? - So the resulting files would be : chunk1.ts, chunk2.ts, etc.