Adding in video image template tag.

src/optimizations/templatetags/assets.py

@@ -10,6 +10,7 @@
 from optimizations.javascriptcache import default_javascript_cache
 from optimizations.stylesheetcache import default_stylesheet_cache
 from optimizations.templatetags import simple_tag, inclusion_tag, assignment_tag
+from optimizations.videocache import default_video_cache, PROPORTIONAL as VIDEO_PROPORTIONAL, JPEG_FORMAT, VideoError
 
 
 register = template.Library()
@@ -59,6 +60,25 @@ def img(src, width=None, height=None, method=PROPORTIONAL, alt="", **attrs):
     return params
 
 
+@inclusion_tag(register, "assets/img.html")
+@assignment_tag(register, name="get_video_img")
+def video_img(src, width, height, method=VIDEO_PROPORTIONAL, alt="", **attrs):
+    """Renders an image tag from the given video."""
+    params = {
+        "alt": alt,
+        "attrs": attrs,
+        "width": width,
+        "height": height,
+    }
+    try:
+        url = default_video_cache.get_url(src, width, height, method, format=JPEG_FORMAT)
+    except VideoError:
+        asset = AdaptiveAsset(src)
+        url = asset.get_url(),
+    params["url"] = url
+    return params
+
+
 def is_url(s):
     """Checks if the given string is a URL."""
     if not isinstance(s, basestring):

src/optimizations/videocache.py

@@ -187,7 +187,7 @@ def __init__(self, asset_cache=default_asset_cache):
         """Initializes the video cache."""
         self._asset_cache = asset_cache
 
-    def get_video(self, asset, width=None, height=None, method=PAD, format=MP4_FORMAT, offset=None):
+    def _get_video_asset(self, asset, width=None, height=None, method=PAD, format=MP4_FORMAT, offset=None):
         """
         Returns a processed video from the given video.
         """
@@ -210,7 +210,15 @@ def get_video(self, asset, width=None, height=None, method=PAD, format=MP4_FORMA
         # Adapt the asset.
         asset = AdaptiveAsset(asset)
         # Create the video.
-        return self._asset_cache.get_path(VideoAsset(asset, width, height, method, format, offset), force_save=True)
+        return VideoAsset(asset, width, height, method, format, offset)
+
+    def get_path(self, *args, **kwargs):
+        """Returns the path of the given video asset."""
+        return self._asset_cache.get_path(self._get_video_asset(*args, **kwargs), force_save=True)
+
+    def get_url(self, *args, **kwargs):
+        """Returns the URL of the given video asset."""
+        return self._asset_cache.get_url(self._get_video_asset(*args, **kwargs), force_save=True)
 
 
 # The default video cache.