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diff --git a/compile_json.js b/compile_json.js
new file mode 100644 (file)
index 0000000..eec3843
--- /dev/null
+++ b/compile_json.js
@@ -0,0 +1,22 @@
+var ids = require('./prelinger_identifiers.json'); ids = ids.identifiers;
+var thumbs = require('./prelinger_thumbs.json');
+
+var output = { "clips" : [] };
+
+for (var i = 0; i < ids.length; i++) {
+  var id = ids[i];
+  for (var j = 0; j < thumbs.length; j++) {
+    var n = thumbs[j].match("/" + id + "/");
+    if (n && n.length > 0) {
+      var thumbnail = thumbs[j].split('?')[0];
+      output.clips.push({
+        "id" : id,
+        "url" : "http://archive.org/details/" + id,
+        "thumbnail" : thumbnail,
+        }
+      );
+    }
+  }
+}
+
+console.log(JSON.stringify(output));

diff --git a/convert_gifs_to_static.py b/convert_gifs_to_static.py
new file mode 100644 (file)
index 0000000..f575e69
--- /dev/null
+++ b/convert_gifs_to_static.py
@@ -0,0 +1,74 @@
+# import json
+# import os
+# from pprint import pprint
+# json_data = open('prelinger.json')
+
+# data = json.load(json_data)
+# #pprint(data)
+
+# for clip in data['clips']:
+#     thumb = clip['thumbnail'].rpartition('?')[0]
+#     print thumb
+#     os.system('cd gifs/prelinger/; curl -O ' + thumb)
+
+# json_data.close()
+
+# convert gifs/prelinger/0540_1935_Pontiac_Advertising_R2_13_38_44_00_3mb.gif[3] -coalesce out.gif
+# convert gifs/prelinger/0540_Spain_in_Revolt_R3_13_00_52_20_3mb.gif -format "%[scenes]" info: | tail -n 1
+
+import os
+src_path="gifs/prelinger/"
+dest_path="gifs/prelinger_static/"
+dirList=os.listdir(src_path)
+
+def main():
+    # count = 0;
+    for f in dirList:
+        # if (count > 10) :
+        #     exit()
+        # count += 1
+        if (f == '.DS_Store'):
+            continue
+
+        gif = f
+
+        print gif
+        numFrames = get_gif_num_frames(src_path + gif);
+        if (numFrames):
+            if (numFrames > 2):
+                staticFrame = numFrames / 2;
+            else:
+                staticFrame = 0;
+            os.system('convert ' + src_path + gif + '[' + str(staticFrame) + '] -coalesce ' + dest_path + gif)
+
+class GIFError(Exception): pass
+def get_gif_num_frames(filename):
+    frames = 0
+    with open(filename, 'rb') as f:
+        if f.read(6) not in ('GIF87a', 'GIF89a'):
+            raise GIFError(filename + ' not a valid GIF file')
+        f.seek(4, 1)
+        def skip_color_table(flags):
+            if flags & 0x80: f.seek(3 << ((flags & 7) + 1), 1)
+        flags = ord(f.read(1))
+        f.seek(2, 1)
+        skip_color_table(flags)
+        while True:
+            block = f.read(1)
+            if block == ';': break
+            if block == '!': f.seek(1, 1)
+            elif block == ',':
+                frames += 1
+                f.seek(8, 1)
+                skip_color_table(ord(f.read(1)))
+                f.seek(1, 1)
+            else: raise GIFError('unknown block type')
+            while True:
+                l = ord(f.read(1))
+                if not l: break
+                f.seek(l, 1)
+    return frames
+
+
+if __name__ == "__main__":
+    main()