Commits on May 9, 2019

1. fix: Use image/jpeg as MIME type for canvas.toBlob …

   The default MIME type for `canvas.toBlob(..)` is `image/png`[0], however, when exporting video assets (e.g. to the Pascal VOC format), the file extension is `.jpg` for each frame, resulting in a mismatch between extension and MIME type, which can cause issues in your data pipeline.
   
   Verified with `PIL` (`image = PIL.Image.open(encoded_image_io)`, `image.format`), and `exiftool` below:
   ```
   $ exiftool /data/Test-PascalVOC-export/JPEGImages/IMG_4926.MOV#t=0.066667.jpg
   ExifTool Version Number         : 11.30
   File Name                       : IMG_4926.MOV#t=0.066667.jpg
   Directory                       : /data/Test-PascalVOC-export/JPEGImages
   File Size                       : 2.5 MB
   File Modification Date/Time     : 2019:05:03 16:35:29+02:00
   File Access Date/Time           : 2019:05:03 18:19:43+02:00
   File Inode Change Date/Time     : 2019:05:03 16:35:29+02:00
   File Permissions                : rw-r--r--
   File Type                       : PNG
   File Type Extension             : png
   MIME Type                       : image/png
   Image Width                     : 1080
   Image Height                    : 1440
   Bit Depth                       : 8
   Color Type                      : RGB with Alpha
   Compression                     : Deflate/Inflate
   Filter                          : Adaptive
   Interlace                       : Noninterlaced
   Image Size                      : 1080x1440
   Megapixels                      : 1.6
   ```
   
   This pull request explicitly sets the MIME type to `image/jpeg` with full quality (1.0).
   
   [0] https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob#Parameters

   

   mloenow authored May 9, 2019
   Configuration menu

   • View commit details
   • Copy full SHA for c87be36
   • Browse repository at this point

   Copy the full SHA

   c87be36 View commit details

   Browse the repository at this point in the history