From ffe1f69dcb8d98356599086af7e60dbffcf9e018 Mon Sep 17 00:00:00 2001
From: "Alan J. Pippin" <alan@pippins.net>
Date: Fri, 18 Nov 2011 15:51:08 -0700
Subject: [PATCH] Various bug fixes and improvements. Added some helper/utility
 scripts.

---
 make_mkv            |  7 +++++--
 merge_videos_by_day |  2 +-
 mkv2mp4             | 12 ++++++++++++
 mkv_extract_chapter | 14 ++++++++++++++
 organize_videos     |  2 +-
 remove_bad_header   | 13 +++++++++++++
 6 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100755 mkv2mp4
 create mode 100644 mkv_extract_chapter
 create mode 100755 remove_bad_header

diff --git a/make_mkv b/make_mkv
index bfbaa11..45ffb75 100755
--- a/make_mkv
+++ b/make_mkv
@@ -118,8 +118,11 @@ foreach my $video (sort{$videos{$a} <=> $videos{$b}} keys %videos) {
 print "$cmd\n";
 if(! defined $opt_s) { 
     my $errno = system("$cmd");
-    if($errno > 0) { $errno = $errno - 255; }
-    if($errno > 1) { die "-E- mkvmerge encountered some errors with exit code $errno\n"; }
+    $errno = $errno >> 8;
+    if($errno > 1) {
+	unlink "$opt_o";
+	die "-E- mkvmerge encountered some errors with exit code $errno\n";
+    }
 }
 
 # Remove the temporary file used for the chapter generation
diff --git a/merge_videos_by_day b/merge_videos_by_day
index f8a5a9e..cd98040 100755
--- a/merge_videos_by_day
+++ b/merge_videos_by_day
@@ -174,7 +174,7 @@ foreach $video (sort keys %videos) {
     } else {
 	# Create the merged video
 	my $errno = system("$cmd");
-	if($errno > 0) { $errno = $errno - 255; }
+	$errno = $errno >> 8;
 	if($errno) { die "-E- make_mkv encountered some errors with exit code $errno\n"; }
 	# Fix the permissions
 	system("chown $owner \"$video\"");
diff --git a/mkv2mp4 b/mkv2mp4
new file mode 100755
index 0000000..463c3d3
--- /dev/null
+++ b/mkv2mp4
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# step 1: convert the mkv to mpg ; many mkv files do not directly get converted to mp4
+mencoder "$1" -ovc lavc -lavcopts vcodec=mpeg1video -aid 0 -oac pcm -o delete_me.mpg
+
+# step 2: convert the mpg file to mp4
+mencoder -of lavf -lavfopts format=mp4 -oac lavc -ovc lavc -lavcopts \
+aglobal=1:vglobal=1:acodec=libfaac:vcodec=mpeg4:abitrate=128:vbitrate=640:keyint=250:mbd=1:vqmax=10:lmax=10:turbo  -af lavcresample=44100 \
+-vf harddup,scale=640:-3 "delete_me.mpg" -o "$1.mp4"
+
+# step 3: delete the temporary huge sized mpg file 
+rm "delete_me.mpg"
diff --git a/mkv_extract_chapter b/mkv_extract_chapter
new file mode 100644
index 0000000..2aa4c54
--- /dev/null
+++ b/mkv_extract_chapter
@@ -0,0 +1,14 @@
+
+# MOV:
+# Video: h264 (avc1 / 0x31637661) 
+# Audio: pcm_s16le
+ffmpeg -ss 00:00:00.000 -t 00:00:38.299 -i 2010-12-04.000.mkv -map 0 -vcodec copy -acodec copy test.mov
+
+# MTS:
+# Video: h264 (High)
+# Audio: ac3 
+
+# MP4:
+# Video: h264 (Baseline) (avc1 / 0x31637661)
+# Audio: aac (mp4a / 0x6134706D)
+
diff --git a/organize_videos b/organize_videos
index d0c7458..539c2c1 100755
--- a/organize_videos
+++ b/organize_videos
@@ -137,7 +137,7 @@ my $merge_opts = "";
 if(defined $opt_t) { $merge_opts .= "-t "; }
 if(defined $opt_r) { $merge_opts .= "-r "; }
 $errno=system("$merge_videos_by_day -s \"$srcpathname\" $merge_opts");
-if($errno > 0) { $errno = $errno - 255; }
+$errno = $errno >> 8;
 if($errno) { die "-E- $merge_videos_by_day encountered some errors with exit code $errno\n"; }
 
 # Copy the videos over to the destination path
diff --git a/remove_bad_header b/remove_bad_header
new file mode 100755
index 0000000..dc85d9b
--- /dev/null
+++ b/remove_bad_header
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+echo "-> Removing bad header on $*"
+
+ffmpeg -ss 2 -i $* -map 0 -acodec copy -vcodec copy new.$*
+
+if [[ $? == 0 ]]; then
+  mv new.$* $*
+else
+  echo "-E- Unable to remove the bad header"
+  rm new.$*
+fi
+
-- 
2.34.1