From 2f9b07c03d262f76114266afa5247a14692665fd Mon Sep 17 00:00:00 2001
From: j <0x006A@0x2620.org>
Date: Mon, 22 Jul 2013 09:26:22 +0200
Subject: [PATCH] improve frame extraction, #849

---
 pandora_client/extract.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pandora_client/extract.py b/pandora_client/extract.py
index a3a5504..ee44857 100644
--- a/pandora_client/extract.py
+++ b/pandora_client/extract.py
@@ -60,7 +60,12 @@ def frame(video, target, position):
     return r == 0
     '''
     #ffmpeg
-    cmd = [command('ffmpeg'), '-y', '-ss', str(position), '-i', video, '-an', '-vframes', '1', target]
+    pre = position - 2
+    if pre < 0:
+        pre = 0
+    else:
+        position = 2
+    cmd = [command('ffmpeg'), '-y', '-ss', str(pre), '-i', video, '-ss', str(position), '-an', '-vframes', '1', target]
     r = run_command(cmd)
     return r == 0