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• H.264 is patented. What happens when developing a commercial app in Android using H264 codec in ffmpeg ? [closed]

  26 mai 2013, par user1914692

  H.264 is patented.

  In countries where patents on software algorithms are upheld, vendors
  and commercial users of products that use H.264/AVC are expected to
  pay patent licensing royalties for the patented technology[14] that
  their products use.

  What happens when developing a commercial app in Android using H264 codec in ffmpeg ?

  Here there are two situations :
  (1) decode online video stream, and display it.

  (2) encode contents to a video file using H.264.

  [Update :]
  From what I googled, here are some simple pieces of information :
  (1) decode : free
  (2) encode : H.264 encoded internet video that is free to end users will never be charged royalties.
  On August 26, 2010 MPEG LA announced that H.264 encoded internet video that is free to end users will never be charged royalties. See Wiki H.264
  (3) encode : for other situations except the one in (2), I guess it might be for commercial use.

  For more, see Ref : "Know your rights : H.264, patent licensing, and you" 2010/05/04

• ffplay - how to have video and audio waveform [duplicate]

  19 février 2018, par francis

  This question already has an answer here :

  • ffplay / ffmpeg setup table with audio and video filters
    
    1 answer
    

  I’ve been trying out various commands trying to figure out how to have a stack of video and audio waveform according to : https://trac.ffmpeg.org/wiki/FancyFilteringExamples#waveform

  Video only :

  ffplay -i abc.mp4 -vf "split[a][b];[a]waveform=e=1,split=1[c];[c]crop=in_w:16:0:0,lutyuv=y=val:v=180[high]; [b][high]vstack=2"

  Audio only :

  ffplay -f lavfi 'amovie=april.flac,asplit=2[out1][a]; [a]showwaves=s=640x240[waves]; [waves] vstack[out0]'

  But there isn’t any that combines and shows the top half as video and bottom half as the audio waveform. Is it possible ?

• Revision 35677 : ajout d’un parametre optionnel "retour" au formulaire spipicious

  27 février 2010, par brunobergot@… — Log

  ajout d’un parametre optionnel "retour" au formulaire spipicious