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

  29 septembre 2022, 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.

  


  # 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
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


  


• Download RTSP recording content between two dates and times, or from start seconds to end seconds

  23 septembre 2022, par holt2

  I need to download from an RTSP link the content recorded on an IP camera from a start and end date and time. It would also be valid to be able to download it from X seconds of start of the recording to seconds of end.

  


  With this ffmpeg command I download the recording content from the RTSP link only from the beginning of the recording content, with the duration in seconds passed by the -t parameter :

  


  ffmpeg -rtsp_transport tcp -i  -r 30 -t <seconds> -y -vf scale=800:-1 -c:v libx264 -crf 20 -preset fast -c:a aac -strict experimental -b:a 192k -ac 2 /path/to/video/filename.mp4&#xA;</seconds>

  


  I tried to download with ffmpeg the content using temporary media fragment URIs (https://www.w3.org/2008/WebVideo/Fragments/wiki/UA_Server_RTSP_Communication#.281.29_Temporal_Media_Fragment_URIs) but it doesn't do it correctly :

  


  ffmpeg -rtsp_transport tcp -i #t=10,20 -r 30 -y -vf scale=800:-1 -c:v libx264 -crf 20 -preset fast -c:a aac -strict experimental -b:a 192k -ac 2 -ss 19:09:13 -t 5 /path/to/video/filename.mp4


  


  I have also tried with ffmpeg to use the -ss parameter to try to extract the recording from a specific hour, minute and second (https://trac.ffmpeg.org/wiki/Seeking) but when running it gets stuck, it does not advance :

  


  ffmpeg -rtsp_transport tcp -i  -r 30 -y -vf scale=800:-1 -c:v libx264 -crf 20 -preset fast -c:a aac -strict experimental -b:a 192k -ac 2 -ss 19:09:13 -t <seconds> /path/to/video/filename.mp4&#xA;</seconds>

  


  In case it's helpful, to get the RTSP link, I'm using the ONVIF protocol with a NodeJS library (https://github.com/agsh/onvif). I have also reviewed the ONVIF documentation available but have not found a way to download recorded content between start and end dates and times.

  


  Do you know how to download from an RTSP link the content recorded on an IP camera from a start date and time and end date, or download it from X seconds of recording start to seconds of end ?

  


  I am also open to use other tools or commands that can do this.

  


• Download SAMPLE-AES-CTR encrypted m3u8

  16 septembre 2022, par Kadir

  I searched but couldn't find a solution How can I download this video ?

  


  https://vod-l3c-eu-east-2.media.dssott.com/ps01/disney/8e61fbd9-80fb-44f0-8108-c67ca45942cc/r/composite_400k_CENC_CTR_FHD_SDR_4e79c2dc-8f22-4a07-ad09-ba0251f79b55_9cf2df75-4260-4820-ada6-f953579ffbb8.m3u8

  


  #EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:9
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PROGRAM-DATE-TIME:2019-01-01T00:00:00.000Z
#EXT-X-DATERANGE:ID="pod_0",START-DATE="2019-01-01T00:00:00.000Z",DURATION=3.000000001,X-START-OFFSET="0.0"
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed",KEYFORMATVERSIONS="1",URI="data:text/plain;base64,AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAABISEB5U5uPKPk0WpO7hIRwr3JI="
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="com.microsoft.playready",KEYFORMATVERSIONS="1",URI="data:text/plain;charset=UTF-16;base64,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"
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="PRMNAGRA",KEYFORMATVERSIONS="1",URI="data:text/plain;base64,eyJrZXktaWQiOiIxZTU0ZTZlMy1jYTNlLTRkMTYtYTRlZS1lMTIxMWMyYmRjOTIiLCJlbWkiOiJjdHIiLCJwcm0iOiJleUpqYjI1MFpXNTBTV1FpT2lKamRISWlMQ0pyWlhsSlpDSTZJakZsTlRSbE5tVXpMV05oTTJVdE5HUXhOaTFoTkdWbExXVXhNakV4WXpKaVpHTTVNaUo5In0="
#EXT-X-MAP:URI="b890e39d-85ff-425b-9a45-c3ca1f3dd423/10c8-BUMPER/02/2400K/map.mp4"
#EXTINF:3.000000001,
b890e39d-85ff-425b-9a45-c3ca1f3dd423/10c8-BUMPER/02/2400K/00/00/00_000.mp4
#EXT-X-DISCONTINUITY
#EXT-X-DATERANGE:ID="pod_1",START-DATE="2019-01-01T00:00:03.000Z",DURATION=2122.000000001,X-START-OFFSET="3.000000001"
#EXT-X-MAP:URI="a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/4250K/map.mp4"
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/00_000.mp4
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/08_000.mp4
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/16_000.mp4