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• Revision 1306c1b09b : Masked Compound Inter Prediction The masked compound motion compensation has ma

  9 août 2013, par Yue Chen

  Changed Paths :
   Modify /configure

  
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_entropymode.h

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/common/vp9_reconinter.c

  
   Modify /vp9/common/vp9_reconinter.h

  
   Modify /vp9/common/vp9_rtcd_defs.sh

  
   Modify /vp9/common/vp9_sadmxn.h

  
   Modify /vp9/common/vp9_subpelvar.h

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/decoder/vp9_treereader.h

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_mcomp.c

  
   Modify /vp9/encoder/vp9_mcomp.h

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_ratectrl.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/encoder/vp9_sad_c.c

  
   Modify /vp9/encoder/vp9_subexp.c

  
   Modify /vp9/encoder/vp9_subexp.h

  
   Modify /vp9/encoder/vp9_variance.h

  
   Modify /vp9/encoder/vp9_variance_c.c

  
  
  Masked Compound Inter Prediction

  The masked compound motion compensation has mask types separating a
  block into wedges at specific angles and offsets. The mask is used to
  weight pixels from the first and second predictors to obtain the final
  predictor. The weighting is smooth near the partition boundaries but
  becomes a selecton farther away.

  Bit-rate reduction : +0.960%(derfraw300) +0.651%(stdhdraw250)

  Change-Id : I1327d22d3fc585b72ffa0e03abd90f3980f0876a

• video hosting with PHP api or PHP script for social network project

  17 avril 2014, par al404IT

  I have a project for a small social network where user can upload their videos, video should not be longer than 1 or 2 minutes but they need to be private and related to user that uploaded.

  Since uploaded video may be in many different format I have two options :

  • upload video and use ffmpeg to process them, can i find any PHP script that does that ? PROS I have my files on my server and I'm not dependent from third party CONS I guess is a real intensive task and I may need a quite good noting plan since the beginning of this project

  • use a video hosting service that provide API to upload and process video, i actually find vzaar.com that may seems to do what I need. PROS Scalable CONS I rely on third party for my contents

  since the project is a small social network it may be interesting this too opusphp.com, but i never user or read about

  can Vimeo PRO suite my needs ? Other suggestions ?
  In future it may be necessary to add a basic video editing function to trim uploaded video setting starting and ending point

• How to smoothly increase / decrease in zoom in and zoom out using ffmpeg in zoompan ?

  3 avril 2023, par dinesh indn

  I have created a new web application which functions as a screen recording tool.

  


  For instance, users can initiate the recording process, and once complete, they can proceed to the editing panel. Within the editing panel, there are various options available such as video zooming in and out based on duration, X and Y coordinates, etc.

  


  As a backend developer, I have utilized the FFmpeg library in Node.js. Although I have successfully implemented some of the zoom in and out functionalities, I am experiencing some difficulty in achieving smooth transitions.

  


  This is the command which I used for output video.

  


  ffmpeg -i input.mp4 -vf " zoompan=z='if(between(in_time,0,04),2,1)':d=1:x='iw/2-(iw/(zoom+0.01)/2)':y='ih/2-(ih/zoom/2)',zoompan=z='if(between(in_time,05,09),2,1)':d=1:x='iw/2-(iw/(zoom+0.01)/50)':y='ih/2-(ih/zoom/1)',zoompan=z='if(between(in_time,11,15),2,1)':d=1:x='iw/50-(iw/(zoom+0.01)/10)':y='ih/2-(ih/zoom/2)' ,zoompan=z='if(between(in_time,18,20),2,1)':d=1:x='iw/2-(iw/(zoom+0.01)/1)':y='ih/2-(ih/zoom/50)' ,zoompan=z='if(between(in_time,22,25),2,1)':d=1:x='iw/30-(iw/(zoom+0.01)/50)':y='ih/2-(ih/zoom/50)', zoompan=z='if(between(in_time,27,30),2,1)':d=1:x='iw/2-(iw/(zoom+0.01)/2)':y='ih/50-(ih/zoom/30)'" output.mp4

  


  Please find below the input video and the output video which I have processed :

  


  Input video : https://fidi-screen-records.s3.ap-south-1.amazonaws.com/videos/sam.mp4

  


  Output video : https://fidi-screen-records.s3.ap-south-1.amazonaws.com/finalVideos/1678798893088_24d034f7469b5e79_x3JT9w.mp4

  


  Ideally, I would like to achieve an output similar to the following video :

  


  Expected output video : https://twitter.com/mickeyxfriedman/status/1631360293564715008?s=46&t=LlV2Tx37C24-F4xCMdZuaA

  


  Could you help me to do smooth zoom in and out transition like the expected video which I shared ?
Do I need to add any packages ? or Do I have to make any changes in my coding ?