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• Why can’t VLC go in to fullscreen mode ?

  31 mai 2017, par matiastofteby

  I’m working on a Matlab application that uses a VLC class to control a VLC-instance. One of the features is to set the VLC player to fullscreen. This feature works perfectly fine.

  The VLC player is downloaded from Matlab’s File Exchange : https://se.mathworks.com/matlabcentral/fileexchange/56215-vlc (Thanks a lot Léa Strobino)

  However, one particular clip insists on resizing the player to a smaller size.
  I have done some research and it turns out that this is a common problem in some VLC versions.

  Normal workarounds are to uncheck the “adapt interface to video size” (something like that) and to check the “Fullscreen” box.
  This ought to make the player open in fullscreen and not resize the screen to video size. The video still resizes the player to a smaller size.

  All the specs of the clips are the same : Same file extension (.vob), formats and were made the same way (I did some video trimming and such using ffmpeg – but the same way every time).

  I have noticed one difference and that is that this particular video has a lower Data and bitrate ( 1000-1500kbps) where as the others are higher (<4000kbps). Also when showing the properties of the clip the frame height and width are blank as opposed to the others that have specific values.

  This should however not have an effect of the fullscreen command from Matlab called after loading the video into the playlist. The command has no effect on this video, but does on all other.

  It is possible to set the player to fullscreen manually by clicking the window, so it is not caused by some restriction in the video not allowing it to fullscreen.

  Why does the video refuse to go in to fullscreen ?

  Hope somebody is able to help.

• How to apply zoompan filter on GIF using FFMPEG

  21 juin 2021, par Pradeep Kumar

  I am creating a video using images with audio length using FFMPEG. In which i have following inputs a background image, a overlay gif, text overlay png file and a watermark png image. I want to add a zoom in out animation effect on overlay.gif file. The animation effect is working fine But the GIF is not working as expected, it is showing as an image. This is working fine with the jpeg/png file. How can i achieve this so GIF is working as expected ?

  &#xA;

  I am using below command.
  &#xA;This command also change the shape of the GIF.

  &#xA;

  ffmpeg -loop,1,-i,background.jpg,-ignore_loop,0,-i,overlayfirst.gif,-loop,1,-i,textOverlay.png,-i,watermark.png,-i,audio.mp3,-filter_complex,[1]scale=493:493,zoompan=z='if(lte(mod(on,60),10),zoom+0.0020,zoom-0.0020)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=200:s=493x493,geq=lum='p(X,Y)':a='st(1,pow(min(W/2,H/2),2))+st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),ld(1)),255,0)',rotate=0.06*PI*t:c=black@0.0:ow='hypot(iw,ih)':oh=ow[b];[2]scale=375:375,rotate=0.06*PI*t:c=black@0.0:ow='hypot(iw,ih)':oh=ow[pic2];[3]scale=100:50[watermark];[0:v][b]overlay=(W-w)/2:(H-h)/2[over1],[over1][pic2]overlay=(W-w)/2:(H-h)/2[pic3],[pic3][watermark]overlay=(W-120):(H-60),scale=830:830,format=yuv420p,-ss,00:00:00,-to,00:00:07,-c:v,mpeg4,-b:a,3M,-c:a,aac,-b:a,192k,-q:v,1,-shortest,output.mp4


  &#xA;

  I also checked this link&#xA;
  &#xA;Please help me. Thanks in advance

  &#xA;

• Revision b6a41802c4 : Simplify select_tx_mode() The function is called only once, right after all sta

  13 août 2014, par Yaowu Xu

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

  
  
  Simplify select_tx_mode()

  The function is called only once, right after all stats counters are
  reset to 0. Therefore all the computations have zero effect on return
  values. This commmit to removed those effectless code.

  Change-Id : I50d27c0802547921fa36c60aa4bd92d76247f595