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• Fill patterns

  26 avril 2008, par Mikko Koppanen — Imagick, PHP stuff

  My work life has been quite busy lately and I haven’t had a chance to sit down and blog. I have been touring around London and some parts of the northern England consulting and organizing some training here and there. Luckily I have had the chance to do some work on Imagick and the 2.2.0 beta release is getting closer. The internal structure was completely restructured and broken down into several smaller files. During this time Imagick was adapted to follow the PHP Coding Standards more closely. Still a work in progress

  I committed slightly modified version of this example to PHP Manual http://uk.php.net/manual/en/imagick.examples.php page a few days ago. The example illustrates using an image as a part of a named fill pattern. The fill pattern is used to annotate text but the named pattern could also be used to fill any shapes that allow fill to be specified (include circles, ellipses, rectangles, polygons etc etc). The code itself is pretty straight forward : Read the image, create the pattern and use the pattern as a fill.

  The ice formations image is from http://www.photoeverywhere.co.uk/west/winterholiday/slides/iceformations5679.htm.

  php

  < view plain text >

  1. < ?php
  2.  
  3. /* Create a new imagick object */
  4. $im = new Imagick( ’iceformations5679.JPG’ ) ;
  5.  
  6. /* Create imagickdraw object */
  7. $draw = new ImagickDraw() ;
  8.  
  9. /* Start a new pattern called "ice" */
  10. $draw->pushPattern( ’ice’ , 0 , 0 , 50 , 50 ) ;
  11.  
  12. /* Composite the image on the pattern */
  13. $draw->composite( Imagick: :COMPOSITE_OVER, 0, 0, 50, 50, $im ) ;
  14.  
  15. /* Close the pattern */
  16. $draw->popPattern() ;
  17.  
  18. /* Use the pattern called "ice" as the fill */
  19. $draw->setFillPatternURL( ’#ice’ ) ;
  20.  
  21. /* Set font size to 52 */
  22. $draw->setFontSize( 52 ) ;
  23.  
  24. /* Annotate some text */
  25. $draw->annotation( 5, 50, "Hello World !" ) ;
  26.  
  27. /* Create a new canvas and white image */
  28. $canvas = new Imagick() ;
  29. $canvas->newImage( 310, 70, "white" ) ;
  30.  
  31. /* Add black border around the resulting image */
  32. $canvas->borderImage( ’black’, 1, 1 ) ;
  33.  
  34. /* Draw the ImagickDraw on to the canvas */
  35. $canvas->drawImage( $draw ) ;
  36.  
  37. /* Set the format to PNG */
  38. $canvas->setImageFormat( ’png’ ) ;
  39.  
  40. /* Output the image */
  41. header( "Content-Type : image/png" ) ;
  42. echo $canvas ;
  43.  ?>

  And the result is here :

  

• Revision 4f660cc018 : Modified mode skip functionality. A previous speed feature skipped modes not us

  5 septembre 2013, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  Modified mode skip functionality.

  A previous speed feature skipped modes not used in earlier
  partitions but this not longer worked as intended following
  changes to the partition coding order and in conjunction
  with some other speed features (Especially speed 2 and above).

  This modified mode skip feature sets a mask after the first X
  modes have been tested in each partition depending on the
  reference frame of the current best case.

  This patch also makes some changes to the order modes are
  tested to fit better with this skip functionality.

  Initial testing suggests speed and rd hit count improvements
  of up to 20% at speed 1. Quality results. (derf -1.9%, std hd +0.23%).

  Change-Id : Idd8efa656cbc0c28f06d09690984c1f18b1115e1

• ffmpeg created video from images does not play in jwplayer

  10 septembre 2013, par user2281222

  I have created a video from images with ffmpeg. Created video plays fine in my local machine with vlc. But it does not play in jwplayer/any web player.

  Commands used :

  ffmpeg -f image2 -r 1/4 -i image_%d.png -c:v libx264 -pix_fmt yuv420p -vf fps=fps=30 int_video.mp4
  
  
  
  ffmpeg -i int_video.mp4 -c:v libx264 -b:v 500k -pix_fmt yuv420p final.mp4"

  Information about the create video is as below :

          General
  
          Complete name                    : /home/oodles/git/picdeo/web-app/uservideos/admin/z4/username_admin__s3vidname_z4.mp4
  
          Format                           : MPEG-4
  
          Format profile                   : Base Media
  
          Codec ID                         : isom
  
          File size                        : 691 KiB
  
          Duration                         : 20s 34ms
  
          Overall bit rate                 : 282 Kbps
  
          Writing application              : Lavf55.12.100
  
  
  
          Video
  
          ID                               : 1
  
          Format                           : AVC
  
          Format/Info                      : Advanced Video Codec
  
          Format profile                   : High@L3.0
  
          Format settings, CABAC           : Yes
  
          Format settings, ReFrames        : 4 frames
  
          Codec ID                         : avc1
  
          Codec ID/Info                    : Advanced Video Coding
  
          Duration                         : 20s 34ms
  
          Bit rate                         : 279 Kbps
  
          Nominal bit rate                 : 500 Kbps
  
          Width                            : 480 pixels
  
          Height                           : 360 pixels
  
          Display aspect ratio             : 4:3
  
          Frame rate mode                  : Constant
  
          Frame rate                       : 30.000 fps
  
          Color space                      : YUV
  
          Chroma subsampling               : 4:2:0
  
          Bit depth                        : 8 bits
  
          Scan type                        : Progressive
  
          Bits/(Pixel*Frame)               : 0.054
  
          Stream size                      : 683 KiB (99%)
  
          Writing library                  : x264 core 135 r2 f0c1c53
  
          Encoding settings                : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=1 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=500 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

  How can I use ffmpeg to create a video that works in jwplayer ?