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• upload video on local host

  20 avril 2017, par chan jack

  when i upload video on local host have error #Unable to detect any supported library#

  @internal_information = InternalInformation.new(internal_information_params)

  if @internal_information.update(internal_information_params)

  respond_to do |format|

  this is my code below

  Model

  class InternalInformation < ApplicationRecord
  
    has_attached_file :video , styles: {
  
                                        :medium => { :geometry => "640x480", :format => 'mp4' },
  
                                        :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
  
                                    }, :processors => [:transcoder]
  
    validates_attachment_content_type :video, content_type: /\Avideo\/.*\Z/
  
  end

  Controller

  def create
  
  @internal_information = InternalInformation.new(internal_information_params)
  
  
  
  respond_to do |format|
  
    if @internal_information.save
  
      format.html { redirect_to @internal_information, notice: 'Internal information was successfully created.' }
  
      format.json { render :show, status: :created, location: @internal_information }
  
    else
  
      format.html { render :new }
  
      format.json { render json: @internal_information.errors, status: :unprocessable_entity }
  
        end
  
      end
  
    end
  
  
  
    # PATCH/PUT /internal_informations/1
  
    # PATCH/PUT /internal_informations/1.json
  
    def update
  
  respond_to do |format|
  
    if @internal_information.update(internal_information_params)
  
      format.html { redirect_to @internal_information, notice: 'Internal information was successfully updated.' }
  
      format.json { render :show, status: :ok, location: @internal_information }
  
    else
  
      format.html { render :edit }
  
      format.json { render json: @internal_information.errors, status: :unprocessable_entity }
  
        end
  
      end
  
    end

  Show

  <%= javascript_include_tag 'swfobject' %>
  
  <p>&lt;%= notice %></p>
  
  
  
  <p>
  
    <strong>Title:</strong>
  
    &lt;%= @internal_information.Title %>
  
  </p>
  
  
  
  <p>
  
    &lt;%= video_player({:file => @internal_information.video.url(:medium), :image => @internal_information.video.url(:thumb)}) %>
  
  </p>
  
  
  
  &lt;%= link_to 'Edit', edit_internal_information_path(@internal_information) %> |
  
  &lt;%= link_to 'Back', internal_informations_path %>

• How to use FFmpeg compression methods in our own C project ?

  29 février 2016, par Sir DrinksCoffeeALot

  I’m currently working on compressing video data on one port and sending it to another port where the data will be decompressed. I would like to try LZW compression method. I’m using pretty old and outdated FFmpeg build (only .h, .lib, .dll files). Problem is that i don’t have any headers to include to get access to LZW encoder and decoder.

  Idea is to open video file, split it into frames, compress them using one of the methods and send them to some remote location where they will be decompressed and concencated into video file.

• Embedding SMPTE 336M KLV data into video

  8 décembre 2023, par Mateo

  I have a drone video in .MP4 format, and an accompanying log file containing various timecoded data, e.g. GPS location, altitude.

  



  I need to embed the data into the video in the SMPTE 336M (KLV Data Encoding Protocol Using Key-Length-Value) standard format.

  



  I've successfully extracted KLV data from a MPEG2-TS file using FFMPEG and a parser in Node.

  



  Now I need to go the other way : to generate KLV data from my log file and insert it into the relevant video. How this is done ?