Add video thumbnail serving

app.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # pilpil-client 0.1
 # abelliqueux <contact@arthus.net>
-from flask import Flask, flash, request, redirect, url_for
+from flask import Flask, flash, request, redirect, url_for, send_file
 from flask_httpauth import HTTPBasicAuth
 import gettext
 import os
@@ -32,6 +32,7 @@ HTTP_secret = str(app.config['DEFAULT']['auth'])
 debug = app.config['DEFAULT']['debug']
 useSSL = app.config['DEFAULT']['useSSL']
 rssi_signal = 0
+thumbnails_folder = "thumb"
 
 # HTTP upload settings
 app.config['UPLOAD_FOLDER'] = upload_folder
@@ -51,6 +52,7 @@ if useSSL:
 if debug:
     print(HTTP_url_scheme)
 
+
 @auth.verify_password
 def verify_password(username, password):
     '''
@@ -59,6 +61,7 @@ def verify_password(username, password):
     if username in users and check_password_hash(users.get(username), password):
         return username
 
+
 def allowed_ext(filename):
     '''
     Check if filename has an allowed extension.
@@ -69,6 +72,7 @@ def allowed_ext(filename):
         if filename.rsplit(".", 1)[-1] in media_exts:
             return True
 
+
 def XMLify(string, child_node_name="child"):
     '''
     '''
@@ -77,6 +81,7 @@ def XMLify(string, child_node_name="child"):
         print("<{0}><{1}>{2}</{1}></{0}>".format(root_element, child_node_name, string))
     return "<{0}><{1}>{2}</{1}></{0}>".format(root_element, child_node_name, string)
 
+
 def get_RSSI():
     '''
     Get wireless signal level to AP
@@ -90,6 +95,7 @@ def get_RSSI():
         print(rssi_signal)
     return XMLify(rssi_signal, child_node_name="rssi")
 
+
 def running_on_rpi():
     with open("/proc/cpuinfo", "r") as wl:
         for line in wl:
@@ -97,6 +103,7 @@ def running_on_rpi():
                 return True
     return False
 
+
 def led_init():
     '''
     Set ACT and PWR leds trigger and turn them off
@@ -106,6 +113,7 @@ def led_init():
     led_set(0, 0)
     led_set(1, 0)
 
+
 def led_set(led_id, state):
     '''
     Set led with id led_id to state.
@@ -114,6 +122,7 @@ def led_set(led_id, state):
     # state : 0 = off, 1 = on
     os.system("echo {} | sudo tee /sys/class/leds/led{}/brightness".format(str(state), str(led_id)))
 
+
 def blink_pi(n):
     '''
     Blink ACT and PWR leds altenatively n times to allow physical identification.
@@ -130,6 +139,7 @@ def blink_pi(n):
     led_set(1, 0)
     return "OK"
 
+
 def thread_blink():
     '''
     Blink leds as a thread to avoid blocking.
@@ -137,12 +147,13 @@ def thread_blink():
     th = threading.Thread(target=blink_pi, args=(16,))
     th.start()
 
+
 def list_media_files(folder):
     '''
     List files in folder which extension is allowed (exists in media_exts).
     '''
     if os.path.exists(folder):
-        files = os.listdir(folder);
+        files = os.listdir(folder)
         medias = []
         for fd in files:
             if len(fd.split('.')) > 1:
@@ -152,16 +163,25 @@ def list_media_files(folder):
     else:
         return []
 
+
+def generate_thumbnails():
+    media_files = list_media_files(upload_folder)
+    for media in media_files:
+        subprocess.call(['ffmpeg', '-i', upload_folder + "/" + media, '-q:v',  '30', '-s' , '160x120' , '-vf' , 'boxblur=2' , '-ss', '00:00:01.000', '-vframes', '1', thumbnails_folder + "/" + media + ".jpg", "-y"])
+
+
 @app.route("/")
 @auth.login_required
 def main():
     return _("Nothing to see here !")
 
+
 @app.route("/rssi")
 @auth.login_required
 def rssi():
     return get_RSSI()
 
+
 @app.route("/blink")
 @auth.login_required
 def blink():
@@ -169,6 +189,7 @@ def blink():
         thread_blink()
     return _("Blinkin")
 
+
 @app.route("/reboot")
 @auth.login_required
 def reboot():
@@ -176,6 +197,7 @@ def reboot():
     print(stdout)
     return _("Rebooting...")
 
+
 @app.route("/poweroff")
 @auth.login_required
 def shutdown():
@@ -185,6 +207,7 @@ def shutdown():
 
 # File upload
 
+
 @app.route('/upload', methods=['GET', 'POST'])
 @auth.login_required
 def upload_file(over_write=1):
@@ -211,7 +234,17 @@ def upload_file(over_write=1):
             return "File exists, skipping..."
     return "OK"
 
+
+
+@app.route("/thumb/<media>")
+@auth.login_required
+def get_thumbnail(media):
+    if media:
+        return send_file( thumbnails_folder + os.sep +  media + ".jpg", mimetype='image/jpg')
+    
+    
 if __name__ == '__main__':
+    generate_thumbnails()
     # Turn ACT and POW leds off on start
     if running_on_rpi():
         led_init()