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• Why can't curl download the ffmpeg-2.7.tar.bz2 ?

  12 juin 2015, par Jerikc XIONG

  I’m working on OS X Yosemite 10.10.2. I want to use curl command to download the ffmpeg-2.7.tar.bz2 as following :

  curl -O http://ffmpeg.org/releases/ffmpeg-2.7.tar.bz2

  It can’t work.

  However it works fine with other url.

  The message as following when add the —verbose option :

  $ curl --verbose -O http://ffmpeg.org/releases/ffmpeg-2.7.tar.bz2
  
  * Hostname was NOT found in DNS cache
  
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
  
                                   Dload  Upload   Total   Spent    Left  Speed
  
    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*   Trying 192.190.173.55...
  
    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* Connected to ffmpeg.org (192.190.173.55) port 80 (#0)
  
  > GET /releases/ffmpeg-2.7.tar.bz2 HTTP/1.1
  
  > User-Agent: curl/7.37.1
  
  > Host: ffmpeg.org
  
  > Accept: */*
  
  > 
  
  * HTTP 1.0, assume close after body
  
  < HTTP/1.0 302 Found
  
  < Location: http://211.167.105.70:80/1Q2W3E4R5T6Y7U8I9O0P1Z2X3C4V5B/ffmpeg.org/releases/ffmpeg-2.7.tar.bz2
  
  < Connection: Close
  
  < 
  
  { [data not shown]
  
    0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
  
  * Closing connection 0

  Where did I go wrong ?

  PS :

  $ curl --version
  
  curl 7.37.1 (x86_64-apple-darwin14.0) libcurl/7.37.1 SecureTransport zlib/1.2.5
  
  Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp smtp smtps telnet tftp 
  
  Features: AsynchDNS GSS-Negotiate IPv6 Largefile NTLM NTLM_WB SSL libz 

• avformat/mux : Allow muxers to set custom min timestamp

  31 août 2022, par Andreas Rheinhardt

  avformat/mux : Allow muxers to set custom min timestamp
  Matroska requires pts to be >= 0 with a slight exception :
  
  It has a mechanism to deal with codec delay, i.e. with
  
  the data added at the beginning that does not correspond
  
  to actual input data and should be discarded by the player.
  
  Only the audio actually intended to be output needs to have
  
  a timestamp >= 0.
  
  In order to avoid unnecessary timestamp shifting, this patch
  
  allows muxers to inform the shifting code about this so that
  
  it can take it into account.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/internal.h
  • [DH] libavformat/mux.c

• 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