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• How to capture video of VIEW in android

  18 novembre 2015, par Mayur R. Amipara

  we can take screen-shot of particular VIEW programmatically in android same way i want to capture video of VIEW , is that possible ?

  i successfully run third party library ffmpeg but it doesn’t provide such functionality.

  Another way i tried it by taking so many screenshot of view each-second and combine it with ffmpeg , but it is to expensive and taking soooooo much time.

  FINAL QUESTIONS :

  i want to add text that is animating on video, any idea todo this ?

  currently get idea that i can animating textview in layout above video is playing in activity and capture that part of screen programatically, but i fail !

  iphone have functionality for adding text overlay with animation and it is called by AVComposition in iPhone. so, Android have such type of any functions or method ?... googled it for 5 days but not getting any result !

  sorry for my bad english, any point to suggest or any idea that how can i achieve this ?

• avcodec/huffman : replace qsort with AV_QSORT

  23 octobre 2015, par Ganesh Ajjanagadde

  avcodec/huffman : replace qsort with AV_QSORT
  ff_huff_build_tree uses qsort underneath. AV_QSORT is substantially
  
  faster due to the inlining of the comparison callback. Furthermore, this
  
  code is reasonably performance critical, since in e.g the fraps codec,
  
  ff_huff_build_tree is called on every frame. This routine is also called
  
  in vp6 on every frame in some circumstances.
  Sample benchmark (x86-64, Haswell, GNU/Linux), vp6 from FATE :
  
  vp6 (old) :
  
    78930 decicycles in qsort,       1 runs,      0 skips
  
    45330 decicycles in qsort,       2 runs,      0 skips
  
    27825 decicycles in qsort,       4 runs,      0 skips
  
    17471 decicycles in qsort,       8 runs,      0 skips
  
    12296 decicycles in qsort,      16 runs,      0 skips
  
     9554 decicycles in qsort,      32 runs,      0 skips
  
     8404 decicycles in qsort,      64 runs,      0 skips
  
     7405 decicycles in qsort,     128 runs,      0 skips
  
     6740 decicycles in qsort,     256 runs,      0 skips
  
     7540 decicycles in qsort,     512 runs,      0 skips
  
     9498 decicycles in qsort,    1024 runs,      0 skips
  
     9938 decicycles in qsort,    2048 runs,      0 skips
  
     8043 decicycles in qsort,    4095 runs,      1 skips
  vp6 (new) :
  
    15880 decicycles in qsort,       1 runs,      0 skips
  
    10730 decicycles in qsort,       2 runs,      0 skips
  
    10155 decicycles in qsort,       4 runs,      0 skips
  
     7805 decicycles in qsort,       8 runs,      0 skips
  
     6883 decicycles in qsort,      16 runs,      0 skips
  
     6305 decicycles in qsort,      32 runs,      0 skips
  
     5854 decicycles in qsort,      64 runs,      0 skips
  
     5152 decicycles in qsort,     128 runs,      0 skips
  
     4452 decicycles in qsort,     256 runs,      0 skips
  
     4161 decicycles in qsort,     511 runs,      1 skips
  
     4081 decicycles in qsort,    1023 runs,      1 skips
  
     4072 decicycles in qsort,    2047 runs,      1 skips
  
     4004 decicycles in qsort,    4095 runs,      1 skips
  Reviewed-by : Timothy Gu <timothygu99@gmail.com>
  
  Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
  

  • [DH] libavcodec/huffman.c

• fmmpeg with windows file with random names

  15 juin 2022, par slimguat

  I have in Windows system some jpg files with this file name style :

  


  fixedname_xxxnumber_randomtext.jpg


  


  I want to use ffmpeg library to generate animation based on these images, but I don't know how to put it with that random part at the end, the only thing I can do is to remove manually all that random text and create a script like in this example.

  


  ffmpeg -start_number 100 -framerate 10 -i fixedname_%%03d.jpg


  


  is there any way to add a symbol like * to just take whatever comes after the order ?