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|
#!/usr/bin/perl
# pic2mpg: Convert picture files to MPEG still frames
#
# Converts either a single picture file or all files in a
# given directory (recursively) to MPEG still frames.
#
# See the README file for copyright information and how to reach the author.
#
# $Id: pic2mpg 4.1 2017/10/06 14:42:18 kls Exp $
use File::Path;
use File::Spec;
use Getopt::Std;
use Image::ExifTool qw(:Public);
$Usage = qq{
Usage: $0 [options] picture-dir mpeg-dir
$0 [options] picture-file mpeg-file
Options: -f Force conversion
-h print Help
-o percent overscan in percent
-s size Screen size (WIDTHxHEIGHT, default is 1920x1080)
-v num Verbose (0=none, 1=list files, 2=detailed)
-x dir[,...] eXclude the given directories
};
getopts("fho:s:v:x:") || die $Usage;
die $Usage if $opt_h;
$Force = $opt_f;
$Overscan = $opt_o || 0;
$Size = $opt_s || "1920x1080";
$Verbose = $opt_v;
@Exclude = split(',', $opt_x || "");
$ListFiles = $Verbose >= 1;
$Detailed = $Verbose >= 2;
# Supported picture types:
%PICTYPES = (
bmp => 1,
gif => 1,
jpeg => 1,
jpg => 1,
png => 1,
pnm => 1,
tif => 1,
tiff => 1,
);
# Command options:
die "$0: missing parameter\n" unless $ARGV[0] && $ARGV[1];
die "$0: file or directory not found: $ARGV[0]\n" unless -e $ARGV[0];
die "$0: source and destination must be different\n" if $ARGV[0] eq $ARGV[1];
$Extent = $Size;
if ($Overscan > 0) {
my ($x, $y) = $Size =~ /(.*)x(.*)/;
my $r = (100 + $Overscan) / 100;
$x = int($x * $r + 0.5);
$y = int($y * $r + 0.5);
$Extent = "${x}x$y";
}
# Convert a single file:
if (-f $ARGV[0]) {
die "$0: mixed file and directory ('$ARGV[0]' <-> '$ARGV[1]')\n" unless !-e $ARGV[1] || -f $ARGV[1];
ConvertFile($ARGV[0], $ARGV[1]);
exit;
}
die "$0: mixed directory and file ('$ARGV[0]' <-> '$ARGV[1]')\n" unless !-e $ARGV[1] || -d $ARGV[1];
$PICDIR = File::Spec->rel2abs($ARGV[0]);
$MPGDIR = File::Spec->rel2abs($ARGV[1]);
# Convert pictures to mpegs:
chdir($PICDIR) || die "$PICDIR: $!\n";
@Pictures = `find -type f | sort`;
chomp(@Pictures);
PIC:
for $pic (@Pictures) {
for (@Exclude) {
next PIC if ($pic =~ /\/$_\//);
}
my $mpg = "$MPGDIR/$pic.mpg";
if ($Force || !-e $mpg || -M $mpg > -M $pic) {
(my $dir = $mpg) =~ s/\/[^\/]*$//;
mkpath($dir);
ConvertFile($pic, $mpg);
}
}
# Remove mpegs without pictures:
chdir($MPGDIR) || die "$MPGDIR: $!\n";
@Mpegs = `find -type f`;
chomp(@Mpegs);
for $mpg (@Mpegs) {
my $pic = "$PICDIR/$mpg";
$pic =~ s/\.mpg$//;
if (!-e $pic) {
print "removing $mpg\n";
unlink($mpg);
}
}
# Remove empty directories:
chdir($MPGDIR) || die "$MPGDIR: $!\n";
for ($i = 0; $i < 10; $i++) { # dirs might become empty when removing empty subdirs
@Dirs = `find -type d -empty`;
chomp(@Dirs);
last unless @Dirs;
for $dir (@Dirs) {
$dir = EscapeMeta($dir);
print "removing $dir\n";
Exec("rm -rf $dir");
}
}
# Actual file conversion:
sub ConvertFile
{
my ($Pict, $Mpeg) = @_;
(my $Type) = lc($Pict) =~ /\.([^\.]*)$/;
return if (!defined $PICTYPES{$Type});
my $Exif = ImageInfo($Pict);
my $Orientation = $$Exif{"Orientation"};
my ($Degrees) = $Orientation =~ /Rotate ([0-9]+)/;
my $Rotate = ($Degrees == 90) ? "transpose=clock" : ($Degrees == 180) ? "hflip,vflip" : ($Degrees == 270) ? "transpose=cclock" : "";
$Rotate .= ',' if ($Rotate);
my $Background = '#000000@1';
print "orientation = '$Orientation' -> rotation = $Rotate\n" if ($Detailed);
$Pict = EscapeMeta($Pict);
$Mpeg = EscapeMeta($Mpeg);
print "$Pict -> $Mpeg $Rotate\n" if $ListFiles;
my $Cmd = "ffmpeg -i $Pict -vf '${Rotate}scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:$Background' -c:v libx264 -pix_fmt yuv420p -f mpegts -y $Mpeg "
. ($Detailed ? "" : "2>/dev/null");
Exec($Cmd);
$Cmd = "touch -r $Pict $Mpeg";
Exec($Cmd);
}
sub EscapeMeta
{
my $META = ' !"#$%&\'()*;<>?[\\]`{|}~';
my $s = shift;
$s =~ s/([$META])/\\$1/g;
return $s;
}
sub Exec
{
my $Cmd = shift;
print "==> '$Cmd'\n" if ($Verbose);
!system($Cmd) || die "$Cmd: $!\n";
}
|
