commit 07be0313c9447bd3a214eb9ec76b1fd037baeb3e
author Chong Zhang <chz@google.com> Fri Feb 16 11:57:09 2018 -0800
committer Chong Zhang <chz@google.com> Thu Feb 22 18:51:54 2018 +0000
tree d953cc2be33c137637c8cdf43f3c2a8381f8eba2
parent f8149eb6ae50ac373731984c817b52f3deb63a67

MediaMuxer: clear file content when writing to existing file

bug: 73546869
Change-Id: I7f38ecef1035f1190effae38634d21a3a18cc09f

media/java/android/media/MediaMuxer.java

diff --git a/media/java/android/media/MediaMuxer.java b/media/java/android/media/MediaMuxer.java
index 02c71b2..205ce8d 100644
--- a/media/java/android/media/MediaMuxer.java
+++ b/media/java/android/media/MediaMuxer.java
@@ -328,6 +328,7 @@
         RandomAccessFile file = null;
         try {
             file = new RandomAccessFile(path, "rws");
+            file.setLength(0);
             FileDescriptor fd = file.getFD();
             setUpMediaMuxer(fd, format);
         } finally {