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• aacpsy : Add energy spread for each band

  26 juin 2015, par Rostislav Pehlivanov

  aacpsy : Add energy spread for each band
  This commit adds the energy spread to the struct for each band and removes 2 unused fields.
  
  distortion and perceptual_weight were not referenced in any file nor were they set to any value,
  
  so it was safe to remove them. The energy spread is currently only used in the aac psy model.
  
  It’s defined as being proportional to the tonality of each band.
  Reviewed-by : Claudio Freire <klaussfreire@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/aacpsy.c
  • [DH] libavcodec/psymodel.h

• Paperclip AV Transcoder not working on remote server

  16 juin 2016, par zreitano

  I am able to upload videos locally. The videos are processed using paperclip and all the meta data is saved correctly, as well. When I tried to upload a video using our remote server, I received the error :

  Av::UnableToDetect (Unable to detect any supported library)

  I have installed ffmpeg using LinuxBrew. It says everything is installed correctly (checking which brew and which ffmpeg, as well as checking if the gem is appropriately installed).

  When I have styling in my model for the video (which is what enables the meta information to be stored and to have control over how the video is uploaded) it doesn’t work remotely.

  has_attached_file :video, path: "/posts/:id/:style.:extension",
  
    :styles => {
  
      :medium => { :geometry => "493x877", :format => 'flv' },
  
      :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 },
  
      # :mobile => {:geometry => "640X480", :format => 'mp4', :streaming => true}
  
    }, :processors => [:transcoder]

  However, when I remove this from my model and have :

  has_attached_file :video, path: "/posts/:id/:style.:extension"

  The video is uploaded to S3 (without the data or styling that I need).

  Any help would be greatly appreciated. I think AV is having trouble finding ffmpeg but I am not sure why or how to go about fixing it. Thanks in advance for any advice.

• Converting png images series to webm with transparent white background from Daz3d

  25 août 2015, par James

  I’m trying to make a webm video with a transparent background from a Daz3D model.
  My process is export png image series with transparent background from Daz3D, use ffmpeg to convert png series to webm video.
  This was working well in Daz3D 4.6.

  But in Daz3D 4.8 the exported background is black instead of white, so when converted to webm is ok on Chrome as has the transparency, but on Firefox is black and has a halo (as Firefox does not support transparency so displays background).

  So I’m looking for a solution with Daz3D, or tools like ImageMagik.
  I almost got it with ImageMagik,

  convert -alpha extract *.png mask.png
  
  mogrify -flatten talk*.png
  
  for /f %x in ('dir /s /b blink*.png') do @composite -compose CopyOpacity mask-0.png %x %x

  But for some reason the final webm has a white background not transparent ...
  Some more info here,

  http://www.daz3d.com/forums/discussion/61237/daz3d-4-8-png-background-is-black

  and here,

  http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28214

  >
  Doh, okay I figured it out. My images were good, but I somehow have two different versions of ffmpeg on my computer and was using the wrong one that doesn’t seem to support transparency.

  Now it is working.

  My only issue is the last shell line,

  for /f %x in (’dir /s /b blink*.png’) do @composite -compose CopyOpacity mask-0.png %x %x

  This only uses mask-0.png, instead of mask-1 for blink01.png, mask-2 for blink02.png etc.