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• FFMpeg slide text from right to left an leave from left to right after x seconds

  13 août 2018, par Marco van 't Klooster

  I’m trying to slide a text inside my video from right to left and leaving the video after 13 seconds.
  The text has to stay there for 13 seconds and the leave in the opposite direction the video.

  Right now I’m using the following command :
  ffmpeg -i Pool\ scores.m4v -vf "[in]drawtext=fontfile=/usr/share/fonts/truetype/msttcorefonts/Arial.ttf:fontsize=40:fontcolor=white:x=900:y=570:text='Marco':enable='between(t,11,24)' [out]" -c:v libx264 scrolling.m4v

  So the text Marco have to be at x=900 and y=570. Thats also the coordinate where the text have to leave from.

  The idea is to create a pool score board where the video is auto generated with dynamic text. In this image there is an example of what the animation have to look like. I’ve to retime it tom match the same speed.
  See example

  Thanks in advance !!

• Suggestions on moving textures in system ram to gpu in DirectX ?

  11 février 2014, par OddlyOrdinary

  I've used FFMPEG to decode a 1080p 60fps video and have a pool of ready texture color information. Stored as just an uint8_t array. I've managed to create ID3D102D textures and update them with the color information, but my performance varies from 45-65fps.

  For reference this is a test application where I'm attempting to draw the video on a mesh. There are no other objects being processed by DirectX or my application.

  My original implementation involved me getting the pixel information from the pool of decoded video frames, using a simple Dynamic texture2d, mapping/memcopying/unmapping. The memcopy was very expensive at about 20% of my runtime.

  I've changed to decoding the video straight to a pool of D3D10_USAGE_DYNAMIC/D3D10_CPU_ACCESS_WRITE textures, and I'm able to always have textures ready before each update loop. I then have a Texture2D applied to the mesh that I'm updating with

  ID3D10Texture2D* decodedFrame = mDecoder->GetFrame();
  
  if(decodedFrontFrame){
  
      //ID3D10Device* device;
  
      device->CopyResource(mTexture, decodedFrame );
  
  }

  From my understanding CopyResource should be faster but I don't see a noticeable difference. My questions are, is there a better way ? Also for textures created with D3D10_USAGE_DYNAMIC, is there a way to tell DirectX that I intend to use it on the gpu the next frame ?

  The last thing I can think of would be decoding to a D3D10_USAGE_DEFAULT, but I don't know how I would create it using existing pixel information in system ram. Suggestions would be greatly appreciated, Thanks !

• Revision 101376 : v1.1.16 : une constante _FULLTEXT_MAX_RESULTS_JOINTURES pour augmenter ...

  28 décembre 2016, par tcharlss@… — Log

  v1.1.16 : une constante _FULLTEXT_MAX_RESULTS_JOINTURES pour augmenter le nombre de résultats provenant de chaque jointure.
  Par défaut c’est limité à 100, ce qui peut exclure certains résultats pertinents.