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• ffmpeg flv to flv conversion compress

  23 avril 2013, par leon

  I am using ClipBucket. I have set up ffmpeg environment, I can convert avi, wmv files to FLV video files without any problem, but now I am trying to convert a FLV video file to FLV video file with different video quality. However, there is error in the conversion. Can someone help me please ?

  Logs :

  Preparing file...
  Unknown file details - Unable to get video details using FFMPEG

  Converting Video
  Conversion Command : /usr/local/bin/ffmpeg -i /home/myspace86/myspace86.com/files/conversion_queue/136667418894906.flv -f flv -vcodec libx264 -r 30 -vf 'movie=/home/myspace86/public_html/player_logo.png [watermark] ; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]' -ab 320000 /home/myspace86/myspace86.com/files/videos/136667418894906.flv 2> /home/myspace86/myspace86.com/files/temp/136667424191b8e.tmp

  Conversion Details

  ffmpeg version N-52385-g6d7ec4f Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Apr 22 2013 16:08:27 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-54)
  
  configuration: --prefix=/usr/local --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libx264 --enable-libxvid
  
  libavutil 52. 27.100 / 52. 27.100
  
  libavcodec 55. 5.100 / 55. 5.100
  
  libavformat 55. 3.100 / 55. 3.100
  
  libavdevice 55. 0.100 / 55. 0.100
  
  libavfilter 3. 60.101 / 3. 60.101
  
  libswscale 2. 2.100 / 2. 2.100
  
  libswresample 0. 17.102 / 0. 17.102
  
  libpostproc 52. 3.100 / 52. 3.100
  
  Input #0, flv, from '/home/myspace86/myspace86.com/files/conversion_queue/136667418894906.flv':
  
  Metadata:
  
  metadatacreator : Yet Another Metadata Injector for FLV - Version 1.4
  
  hasKeyframes : true
  
  hasVideo : true
  
  hasAudio : true
  
  hasMetadata : true
  
  canSeekToEnd : false
  
  datasize : 40992128
  
  videosize : 37546219
  
  audiosize : 3247153
  
  lasttimestamp : 728
  
  lastkeyframetimestamp: 727
  
  lastkeyframelocation: 40978250
  
  Duration: 00:12:08.16, start: 0.000000, bitrate: 450 kb/s
  
  Stream #0:0: Video: vp6f, yuv420p, 648x459, 409 kb/s, 29.97 tbr, 1k tbn, 1k tbc
  
  Stream #0:1: Audio: mp3, 22050 Hz, mono, s16p, 32 kb/s
  
  [libx264 @ 0x146d900] height not divisible by 2 (648x459)
  
  Output #0, flv, to '/home/myspace86/myspace86.com/files/videos/136667418894906.flv':
  
  Metadata:
  
  metadatacreator : Yet Another Metadata Injector for FLV - Version 1.4
  
  hasKeyframes : true
  
  hasVideo : true
  
  hasAudio : true
  
  hasMetadata : true
  
  canSeekToEnd : false
  
  datasize : 40992128
  
  videosize : 37546219
  
  audiosize : 3247153
  
  lasttimestamp : 728
  
  lastkeyframetimestamp: 727
  
  lastkeyframelocation: 40978250
  
  Stream #0:0: Video: h264, yuv420p, 648x459, q=-1--1, 90k tbn, 30 tbc
  
  Stream #0:1: Audio: none, 22050 Hz, mono, s16p
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (vp6f -> libx264)
  
  Stream #0:1 -> #0:1 (mp3 -> libmp3lame)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  
  
  
  
  Unknown file details - Unable to get output video details using FFMPEG 
  
  
  
  
  
  Time Took : 0.3056 seconds
  
  
  
  conversion_status : completed

• Carrierwave and FFMPEG saving to 2 destinations - Rails, Fog, S3

  20 avril 2013, par dodgerogers747

  I have a video model, which uses Carrierwave, Fog, FFMPEG and S3 to handle video files. I have a method in my video model that takes a screenshot before the video is saved to S3. Both Video and screenshot are saved to S3 using 2 Carrierwave Uploader classes, Image_uploader and video_uploader with the video being saved to the Video.file column and screenshot saved at the Video.screenshot.

  This all works as intended, however, FFMPEG also saves a copy of the screenshot to the rails filesystem, "Rails.root/file_is_saved_here". For now I have FFMPEG saving this file into the Rails.root/public/uploads folder along with the tmp files created by Carrierwave.

  How can I get one screenshot saved to S3 without the second being saved on the filesystem ?

  Commit & trace data and

  Running transcoding...
  
  /opt/local/bin/ffmpeg -y -i /Users/me/rails_projects/teebox_network/public/uploads/tmp/200/14_jan_2013_hk.mov -ss 3 -vframes 1 -f image2 /Users/garyrogers/rails_projects/teebox_network/public/uploads/14_jan_2013_hk.mov_screenshot.png
  
  
  
  Transcoding of /Users/me/rails_projects/teebox_network/public/uploads/tmp/200/14_jan_2013_hk.mov to /Users/garyrogers/rails_projects/teebox_network/public/uploads/14_jan_2013_hk.mov_screenshot.png succeeded
  
  
  
  Started POST "/videos" for 127.0.0.1 at 2013-04-19 17:03:07 -0700
  
  Processing by VideosController#create as */*
  
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"DjFIu3971GxKYJzjDFu7LaBx85iOHPa5HzO6PLdSW+8=", "video"=>{"user_id"=>"5", "file"=>#quicktime\r\n", @tempfile=#var/folders/1g/d9qbm7_s0_5fcljtvzysp1gc0000gn/T/RackMultipart20130419-751-19kisab>>}}
  
    User Load (0.5ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 5 LIMIT 1
  
     (0.2ms)  BEGIN
  
    SQL (14.9ms)  INSERT INTO `videos` (`created_at`, `file`, `question_id`, `screenshot`, `updated_at`, `user_id`) VALUES ('2013-04-20 00:03:20', '14_jan_2013_hk.mov', NULL, '14_jan_2013_hk.mov_screenshot.png', '2013-04-20 00:03:20', 5)

  video.rb

  class Video < ActiveRecord::Base
  
  
  
    attr_accessible :user_id, :question_id, :file
  
    belongs_to :question
  
    belongs_to :user
  
  
  
    default_scope order('created_at DESC')
  
  
  
    before_save :take_screenshot
  
  
  
    mount_uploader :file, VideoUploader
  
    mount_uploader :screenshot, ImageUploader
  
  
  
    def to_param
  
      "#{id} - #{File.basename(self.file.path)}".parameterize
  
    end
  
  
  
    private 
  
  
  
    def take_screenshot
  
      FFMPEG.ffmpeg_binary = '/opt/local/bin/ffmpeg'
  
      movie = FFMPEG::Movie.new(self.file.current_path)
  
      self.screenshot = movie.screenshot("#{Rails.root}/public/uploads/#{File.basename(self.file.path)}_screenshot.png", seek_time: 3 )
  
    end
  
  end

  image_uploader class

  class ImageUploader < CarrierWave::Uploader::Base
  
  
  
     include Sprockets::Helpers::RailsHelper
  
     include Sprockets::Helpers::IsolatedHelper
  
  
  
    storage :fog
  
  
  
    process resize_and_pad: [270, 135, '#000']
  
  
  
    def store_dir
  
      "uploads/#{model.class.to_s.underscore}_screenshots/#{mounted_as}_images/#{model.id}"
  
    end
  
  
  
    def extension_white_list
  
      %w(png jpg)
  
      # %w(ogg ogv 3gp mp4 m4v webm mov)
  
    end

  Video uploader class

  class VideoUploader < CarrierWave::Uploader::Base
  
  
  
     include Sprockets::Helpers::RailsHelper
  
     include Sprockets::Helpers::IsolatedHelper
  
  
  
    storage :fog
  
  
  
   def store_dir
  
      "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  
    end
  
  
  
    def extension_white_list
  
      %w(ogg ogv 3gp mp4 m4v webm mov m2v 3g2)
  
      # %w(ogg ogv 3gp mp4 m4v webm mov)
  
    end

• x264_encoder_encode() how to watch function body ?

  25 février 2016, par ULTRANj

  I’m working with VLC player source code (GitHub link) and I need to study how the function x264_encoder_encode() in codec h.264 works. This function is used in file x264.c but i couldn’t find it’s body and decloration. Where can I see it ?