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• WebM on the web

  23 mai 2010, par Basil Gohar — Software, Updates, flumotion, gstreamer, mpeg-la, ogg, vp8, webm, xiph

  News & developments about WebM are coming too fast to cover all of them, but it’s definitely encouraging to see that the free software world (as well as some other surprising, but welcome, players) has unequivocally embraced WebM as the … Read more (...)

• How to use pathinfo in php ?

  10 juin 2019, par flash

  I am working on a php code as shown below on which Line#A prints the following array (shown below php code). My code doesn’t seems to go inside switch statement. I am not sure why.

  I added print_r($parts) at Line A in order to print the value of $parts.

  php code :

  <?php
  
      if (!empty($_POST['id']))
  
      {
  
      for($i=0; $i / Line A
  
      switch ($parts['extension'])
  
      {
  
      echo "Hello World";                 // Line B
  
      case 'mp4' :
  
      $filePath = $src_dir . DS . $f;
  
      system('ffmpeg -i ' . $filePath . ' -map 0:2 -ac 1 ' . $destination_dir . DS . $parts['filename'] . '.mp3', $result);
  
      }
  
      }
  
      }
  
      }
  
  ?>

  Output (Line#A) :

  Array 
  
  (
  
      [dirname]  => .
  
      [basename] => hello.mp4
  
      [extension] => mp4
  
      [filename] => hello
  
  )

  I have used echo "Hello World" at Line B but for some reasons, its not getting printed and throwing 500 internal server error on console.

  Problem Statement :

  I am wondering what changes I should make in the php code so that it goes inside switch statement.

• Cannot display a decoded video frame on Raylib

  20 décembre 2024, par gabriel_tiso

  I'm trying to explore libav and raylib just to understand how audio and video work, and also to learn how to build nice interfaces using the raylib project. I've implemented a simple struct capable of decoding audio and video frames. When a video frame appears, I convert it to the RGBA format, which packs the values into 32bpp. This is the setup :

  


      if (av_image_alloc((uint8_t **)media->dst_frame->data,
                       media->dst_frame->linesize, media->ctxs[0]->width,
                       media->ctxs[0]->height, AV_PIX_FMT_RGBA, 1) < 0) {
        fprintf(stderr, "Failed to setup dest image\n");
        return -1;
    }

    media->sws_ctx = sws_getContext(
        media->ctxs[0]->width, media->ctxs[0]->height, media->ctxs[0]->pix_fmt,
        media->ctxs[0]->width, media->ctxs[0]->height, AV_PIX_FMT_RGBA,
        SWS_BILINEAR, NULL, NULL, 0);

    // Later on, in the decode function:
    int ret = sws_scale(media->sws_ctx, media->frame->data,
                            media->frame->linesize, 0, media->frame->height,
                            media->dst_frame->data, media->dst_frame->linesize);



  


  In the main file, I init raylib, and setup the necessary steps to load the texture (here I'm trying to fetch the first video frame in order to show the user a preview of the video, later on I plan to reset the stream to allow a correct playback routine). I think the format of the image is right.

  


      Image previewImage =
        GenImageColor(videoArea.width, videoArea.height, BLACK);
    // I assume this makes the formats compatible
    ImageFormat(&previewImage, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8);

    Texture2D videoTexture = LoadTextureFromImage(previewImage);
    UnloadImage(previewImage);


  


  
        if (!state->has_media) {
            DrawText("Drop a video file here!", videoArea.x + 10,
                     videoArea.y + 10, 20, GRAY);
        } else {
            if (state->first_frame) {
                do {
                    decode_packet(state->media);
                } while (!is_frame_video(state->media));

                UpdateTexture(videoTexture, state->media->dst_frame->data[0]);

                state->first_frame = 0;
            }
        }

        DrawTexture(videoTexture, videoArea.x, videoArea.y, WHITE);


  


  Anyway, this is what I get when a mp4 file is dropped :


  


  It seems like an alignment issue maybe ? Can someone point me in the right direction in order to correctly solve this problem ?