create unwrap script

Author: valterm

Scripts/Miscellaneous/Unwrap_video/README.md

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+# unwrap.py
+
+Unwraps a video into a flattened texture using ffmpeg.
+
+### Prerequisites
+```pip3 install pillow```
+ffmpeg, available from [here.](https://ffmpeg.org)
+
+### How to run the script
+Move the videos you want unwrapped into the media directory, then run:
+```python3 unwrap.py```
+
+### Screenshot/GIF showing the sample use of the script
+Example video is located in media.
+
+This might not look like much, but with better source videos the unwrapped picture will be more meaningful too.
+![result](/media/IMG_6610.MOV_unwrapped.jpeg)
+
+## *Author Name*
+<!--Remove the below lines and add yours -->
+Made with ♥ by [valterm](github.com/valterm)

Scripts/Miscellaneous/Unwrap_video/media/IMG_6610.MOV

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+Pillow==8.0.1

Scripts/Miscellaneous/Unwrap_video/media/IMG_6610.MOV_unwrapped.jpeg

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+from PIL import Image
+import glob, os, subprocess
+
+#process each video in media folder
+for video in glob.glob('media/*'):
+    #only process videos, ignore generated images
+    if not 'jpeg' in video:
+        #get video resolution
+        result = subprocess.run(['ffprobe', '-v', 'error', '-select_streams', 'v:0', '-show_entries', 'stream=width,height', '-of', 'csv=s=,:p=0', video], stdout=subprocess.PIPE)
+        resolution = result.stdout.decode('utf-8')
+        height,width = resolution.split(',')                
+        height = int(height)
+        width = int(width)
+
+        #from each frame of the video, grab the center pixels and store them temporarily
+        os.system('ffmpeg -i ' + video +' -filter:v "crop=2:' + str(height) + ':' + str(width/2) + ':1" -q:v 1 tmp/images-%04d.jpeg')
+        
+        #define the series of images to be processed from the temp images
+        series = glob.glob("tmp/*.jpeg")
+        #the composite will be as wide as the number of images
+        image_size = (len(series), height)
+        #Create empty image
+        composite = Image.new("RGB", image_size)
+        pix_col = 0
+
+        #loop through the images and fill the composite
+        for tmp_img in series:
+            file, ext = os.path.splitext(tmp_img)
+            image = Image.open(tmp_img)
+            image_strip = image.crop( (0, 0, 1, height) )
+            composite.paste(image_strip, (pix_col, 0))
+            #pix_col is used to keep track of where the 'building' of the image is, from left to right by pixels
+            pix_col += 1
+            image.close()
+            os.remove(tmp_img)
+
+        #save composite
+        composite.save(video + '_unwrapped.jpeg', 'JPEG')
+