+ # Make a note of the video extension
+ my $video_ext = $video;
+ $video_ext =~ s/.*\.(\S+)$/$1/;
+
+ # Detect if the input file is interlaced or not.
+ # There is a bug in mkvmerge 5.0.1 and earlier where if the video content is 1080i, it doesn't mux it properly, and it stutters.
+ # The quick solution to this issue is to run the interlaced video file through ffmpeg and tell it to copy the video/audio streams to a mkv container.
+ # We will then merge this temporarily created mkv container into the final mkv container instead of the original interlaced video.
+ # http://ubuntuforums.org/showthread.php?t=1627194
+ # http://forum.doom9.org/showthread.php?t=155732&page=31
+
+ # This is the best way to detect if content is interlaced or progressive:
+ # http://www.aktau.be/2013/09/22/detecting-interlaced-video-with-ffmpeg/
+ my $progressive = 0;
+ my $detect_cmd = "$ffmpeg -filter:v idet -frames:v 100 -an -f rawvideo -y /dev/null -i \"$video\" 2>&1 | grep Parsed_idet";
+ if($opt_v) { print " $detect_cmd\n"; }
+ my $detect_output = `$detect_cmd`;
+ if($detect_output !~ /Progressive:0/) { $progressive = 1; }
+ if(!$progressive) {
+ my $video_mkv = $video;
+ print " Detected interlaced video content: $video\n";
+ # We don't need to do this anymore since it is not an issue with the new mkvmerge
+ if($video_ext !~ /mkv/i) {
+ $video_mkv =~ s/\.[^.]*$//; $video_mkv .= ".ffmpeg.mkv";
+ print " Re-muxing the interlaced video content as an mkv file: $video_mkv\n";
+ my $make_mkv_cmd = "$avconv -y -i \"$video\" -scodec copy -acodec copy -vcodec copy -f matroska \"$video_mkv\" >> \"$tmpfile\" 2>&1";
+ if($opt_v) { print " $make_mkv_cmd\n"; }
+ if(! defined $opt_s) {
+ my $errno = system("$make_mkv_cmd");
+ $errno = $errno >> 8;
+ if($errno > 1) {
+ unlink "$video_mkv";
+ die "-E- ffmpeg encountered some errors with exit code $errno\n";
+ }
+ }
+ # Push the name of our intermediate video file onto a list of files to delete on exit
+ push(@video_tmp_files, "$video_mkv");
+ # Update the name of our video file to equal the name of our new intermediate video file name
+ $video = $video_mkv;
+ }
+ } else {
+ print " Detected progressive video content: $video\n";
+ }
+
+ # Re-quantize or re-compress the input video to reduce the resulting output filesize
+ # This also gives us a chance to deinterlace the video as well
+ # Only re-quantize for .MTS videos
+ # We can re-compress any input video
+ if(((defined $opt_q) && ($video_ext =~ /mts/i)) || (defined $opt_z)) {
+
+ my $handbrake_options = "";
+
+ # Set our output video filename
+ my $video_mp4 = $video; $video_mp4 =~ s/\.[^.]*$//; $video_mp4 .= ".hb.mp4";
+
+ # Set our requantize factor accordingly
+ if(defined $opt_q) {
+ print " Re-quantizing input video content to: $video_mp4\n";
+ $handbrake_options = $handbrake_requantize_options;
+ if(!$progressive) { $handbrake_options = "-q $interlaced_requantize_quality"; }
+ else { $handbrake_options = "-q $progressive_requantize_quality"; }
+ };
+
+ # Set our recompress options accordingly
+ if(defined $opt_z) {
+ print " Re-compressing input video content to: $video_mp4\n";
+ $handbrake_options = $handbrake_recompress_options;
+ # We want our audio to be passed-through by default, so detect how the audio of the input is encoded, and tell handbrake to make the output match
+ if($opt_v) { print " $ffmpeg -i \"$video\" 2>&1 | grep \"Audio\" | sed -r -e 's/.*?Audio: (\\S+).*?/\\1/'\n"; }
+ $AUDIO_CODEC=`$ffmpeg -i "$video" 2>&1 | grep "Audio" | sed -r -e 's/.*?Audio: (\\S+).*?/\\1/'`; chomp($AUDIO_CODEC);
+ if($AUDIO_CODEC eq "") { die "-E- Unable to extract audio track encoding from input video file: $video\n"; }
+ $handbrake_options .= " -E copy:$AUDIO_CODEC";
+ }
+
+ # Set our de-interlace option accordingly
+ my $deinterlace_option = "";
+ if(!$progressive) { $deinterlace_option = "-d"; }
+
+ # Use HandBrake to requantize/recompress/deinterlace the input video
+ my $handbrake_cmd = "$handbrake $deinterlace_option $handbrake_options -i \"$video\" -o \"$video_mp4\" >> \"$tmpfile\" 2>&1";
+ if($opt_v) { print " $handbrake_cmd\n"; }
+ if(! defined $opt_s) {
+ my $errno = system("$handbrake_cmd");
+ $errno = $errno >> 8;
+ if($errno > 1) {
+ unlink "$video_mp4";
+ die "-E- handbrake encountered some errors with exit code $errno\n";
+ }
+ }
+
+ # Push the name of our intermediate video file onto a list of files to delete on exit
+ push(@video_tmp_files, "$video_mp4");
+ # Update the name of our video file to equal the name of our new intermediate video file name
+ $video = $video_mp4;
+ }
+
+ # Create our input file command line options for this video