From 0090bf85738fedac38caee78768b5c51fe65c46c Mon Sep 17 00:00:00 2001
From: Mikael Finstad <finstaden@gmail.com>
Date: Wed, 29 Mar 2017 21:01:14 +0200
Subject: [PATCH] Don't try to seek when no duration

Also don't allow cuttin without a valid start/end (yes i removed this earlier)

https://github.com/mifi/lossless-cut/issues/10#issuecomment-290183019
---
 src/renderer.jsx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/renderer.jsx b/src/renderer.jsx
index 7e70273a..94dd24e2 100644
--- a/src/renderer.jsx
+++ b/src/renderer.jsx
@@ -20,6 +20,8 @@ function getVideo() {
 
 function seekAbs(val) {
   const video = getVideo();
+  if (val == null || isNaN(val)) return;
+
   let outVal = val;
   if (outVal < 0) outVal = 0;
   if (outVal > video.duration) outVal = video.duration;
@@ -230,6 +232,9 @@ class App extends React.Component {
     const cutStartTime = this.state.cutStartTime;
     const cutEndTime = this.state.cutEndTime;
     const filePath = this.state.filePath;
+    if (cutStartTime === undefined || cutEndTime === undefined) {
+      return alert('Please select both start and end time');
+    }
     if (cutStartTime >= cutEndTime) {
       return alert('Start time must be before end time');
     }