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• arm : vp9itxfm16 : Avoid reloading the idct32 coefficients

  24 février 2017, par Martin Storsjö

  arm : vp9itxfm16 : Avoid reloading the idct32 coefficients
  Keep the idct32 coefficients in narrow form in q6-q7, and idct16
  
  coefficients in lengthened 32 bit form in q0-q3. Avoid clobbering
  
  q0-q3 in the pass1 function, and squeeze the idct16 coefficients
  
  into q0-q1 in the pass2 function to avoid reloading them.
  The idct16 coefficients are clobbered and reloaded within idct32_odd
  
  though, since that turns out to be faster than narrowing them and
  
  swapping them into q6-q7.
  Before :                            Cortex       A7        A8        A9      A53
  
  vp9_inv_dct_dct_32x32_sub4_add_10_neon :    22653.8   18268.4   19598.0  14079.0
  
  vp9_inv_dct_dct_32x32_sub32_add_10_neon :   37699.0   38665.2   32542.3  24472.2
  
  After :
  
  vp9_inv_dct_dct_32x32_sub4_add_10_neon :    22270.8   18159.3   19531.0  13865.0
  
  vp9_inv_dct_dct_32x32_sub32_add_10_neon :   37523.3   37731.6   32181.7  24071.2
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/arm/vp9itxfm_16bpp_neon.S

• Playing large AVI files online with subtitles

  3 mai 2012, par Tareq

  I need a way to play a relatively large avi files (1+ GB) on the web with their subtitles, I have searched a lot for this, the only thing that I came up with was a normal embed without controls and it requires specific browser or application to show controls or even play.

  I have a large number of files (12 TB) so converting these files to mp4 would take ages not to mention having to miss with quality of audio or video.

  Is there a way that allows me to play these online along with their subtitls or should I convert these to MP4 ? I have tried to convert a file to MP4 and it didn't play either apparently it hits the browser limits or something (I tried playing it using flowplayer).

  I was considering a solution like red5, but as I found out it doesn't support avi either.

  I used this command to convert the mp4

  ffmpeg -y -i $file.avi -vcodec copy -acodec copy -copyts -f mp4 $file.mp4

  It toke relatively long time to get converted, if you have a better command or a solution that will work for playing the avis without converting, Please be my guest.

• PHP ffmpeg not found

  17 décembre 2020, par heisenberg

  so I already browse all the forum but I still get error "sh : 1 : /usr/bin/ffmpeg : not found".
If I run ffmpeg from terminal it works just fine and can do convert video without problem, but if I use PHP exec or shell_exec, the return always ffmpeg not found.

  


  this is my code :

  


  $cmd = "/usr/bin/ffmpeg";

$run = exec($cmd." -i 'linkvideo.m3u8' -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 /test_stream/newfile.mp4 2>&1");

var_dump($run);


  


  if I run which ffmpeg or whereis ffmpeg from terminal it will return /usr/bin/ffmpeg, but if I exec('which ffmpeg') from my code it will return ffmpeg not found. I already chown and chmod the ffmpeg to grant rwx, i tried move ffmpeg to /usr/local/bin still same result. If i run whoami from terminal it will show root but if from my code using exec('whoami') it will show www-data so maybe I miss something about the user but I also already tried to chown ffmpeg from root to www-data still the result is ffmpeg not found, maybe anyone can help, I'm using codeigniter and already install ffmpeg in server using sudo apt-get ffmpeg, thanks before !