Recherche avancée

Sur d’autres sites (6379)

• How to extract orientation information from MOV videos created on the iPhone using ffmeg, ruby or objectivec ?

  5 octobre 2014, par Sid

  After surfing through tons of documentation on the web it seems that the iPhone always shoots the video at a 480x360 aspect ratio and applies a transformation matrix on the video track. (480x360 may change but its always the same for a given device)

  Here is a way of modifying the ffmpeg source within a iOS project and accessing the matrix http://www.seqoy.com/correct-orientation-for-iphone-recorded-movies-with-ffmpeg/

  Here is a cleaner way of finding the transformation matrix in iOS-4
  how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

  How can the orientation of the video be extracted in either of the options below -
  
   iOS 3.2
  
   ffmpeg (through the command line server side)
  
   ruby
  

  Any help will be appreciated.

• FFMPEG - Concat videos with audio not working

  9 février 2019, par S.T

  i have a command that takes 2 movies, each one needs to be 2-3 times in a loop, and then show them in one video side by side.
  my problem is that the loop is not working, i see the movies side by side (with both audio) which is great but only one time each movie, not in a loop. the concat command is not working...
  the Command is :

     ffmpeg -i in1 -i in2  -filter_complex, \
  
     "[0:v:0][0:a:0][0:v:0][0:a:0]concat=n=2:v=1:a=1[concat1v][concat1a];\
  
     [concat1v]fifo,pad=width=iw+20:height=ih+20:x=10:y=10:color=green[a];\
  
     [1:v:0][1:a:0][1:v:0][1:a:0][1:v:0][1:a:0]concat=n=3:v=1:a=1[concat2v] 
  
     [concat2a];\
  
     [concat2v]fifo,pad=width=iw+20:height=ih+20:x=10:y=10:color=red[b];\
  
     [a][b]hstack=inputs=2[video];\
  
     [concat1a][concat2a]amerge=inputs=2,pan=stereo|FLcode>

  the log is at
  https://pastebin.com/iy4n2MFZ

• Revision 32453 : on renomme xcache en memoization, puisque c’est de ca qu’il s’agit ...

  29 octobre 2009, par fil@… — Log

  on renomme xcache en memoization, puisque c’est de ca qu’il s’agit  http://fr.wikipedia.org/wiki/Memoization (merci a Thomas Sutton)
  le memo filecache.inc se limite a 16^{4 fichiers, ce qui fait qu’il n’y a plus besoin de garbage collector}