| 1 |
#!/usr/bin/perl -w |
| 2 |
|
| 3 |
# amv.pl |
| 4 |
# |
| 5 |
# 07/19/07 19:21:39 CEST Dobrica Pavlinusic <dpavlin@rot13.org> |
| 6 |
# |
| 7 |
# Various useful links used to produce this: |
| 8 |
# http://www.moviecodec.com/topics/15431p1.html |
| 9 |
# http://en.wikipedia.org/wiki/RIFF_(File_format) |
| 10 |
# http://www.obrador.com/essentialjpeg/HeaderInfo.htm |
| 11 |
# http://lists.helixcommunity.org/pipermail/datatype-dev/2005-January/001886.html |
| 12 |
# http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm |
| 13 |
|
| 14 |
use strict; |
| 15 |
|
| 16 |
use Data::Dump qw/dump/; |
| 17 |
use Carp qw/confess/; |
| 18 |
use File::Path; |
| 19 |
use Getopt::Long; |
| 20 |
|
| 21 |
my $dump_amv = 0; |
| 22 |
my $dump_video = 0; |
| 23 |
my $dump_jpeg = 0; |
| 24 |
my $dump_audio = 0; |
| 25 |
my $debug = 0; |
| 26 |
my $verbose = 0; |
| 27 |
my $dump_dir = '/tmp/dump/'; |
| 28 |
my $dump_avi = "dump.avi"; |
| 29 |
my $no_jpeg_header = 0; |
| 30 |
my $jpeg_q = 100; |
| 31 |
my $jpegtran; |
| 32 |
|
| 33 |
GetOptions( |
| 34 |
"dump-amv!" => \$dump_amv, |
| 35 |
"dump-video!" => \$dump_video, |
| 36 |
"dump-jpeg!" => \$dump_jpeg, |
| 37 |
"dump-audio!" => \$dump_audio, |
| 38 |
"debug!" => \$debug, |
| 39 |
"dump-dir=s" => \$dump_dir, |
| 40 |
"no-jpeg-headers!" => \$no_jpeg_header, |
| 41 |
"jpegtran=s" => \$jpegtran, |
| 42 |
"verbose!" => \$verbose, |
| 43 |
); |
| 44 |
|
| 45 |
my $path = shift @ARGV || die "usage: $0 movie.amv\n"; |
| 46 |
|
| 47 |
# by default, flip frames |
| 48 |
#$jpegtran = '-flip vertical' unless defined($jpegtran); |
| 49 |
|
| 50 |
rmtree $dump_dir if -e $dump_dir; |
| 51 |
mkpath $dump_dir || die "can't create $dump_dir: $!"; |
| 52 |
|
| 53 |
open(my $fh, '<', $path) || die "can't open $path: $!"; |
| 54 |
|
| 55 |
# offset in file |
| 56 |
my $o = 0; |
| 57 |
|
| 58 |
# shared data hash |
| 59 |
my $d; |
| 60 |
|
| 61 |
sub hex_dump { |
| 62 |
my ( $bytes, $offset ) = @_; |
| 63 |
return unless $bytes; |
| 64 |
|
| 65 |
my $old_o; |
| 66 |
if (defined($offset)) { |
| 67 |
$old_o = $o; |
| 68 |
$o = $offset; |
| 69 |
} |
| 70 |
|
| 71 |
my $ascii = $bytes; |
| 72 |
$ascii =~ s/\W/./gs; |
| 73 |
my $hex = uc( unpack('h*', $bytes) ); |
| 74 |
$hex =~ s/(..)/$1 /g; |
| 75 |
# calculate number of characters for offset |
| 76 |
#my $d = length( sprintf("%x",length($bytes)) ); |
| 77 |
my $d = 4; |
| 78 |
my $prefix = '#.'; |
| 79 |
while ( $hex =~ s/^((?:\w\w\s){1,16})// ) { |
| 80 |
printf "$prefix %0${d}x | %-48s| %s\n", $o, $1, substr( $ascii, 0, 16 ); |
| 81 |
$prefix = '##'; |
| 82 |
if ( length($ascii) >= 16 ) { |
| 83 |
$ascii = substr( $ascii, 16 ); |
| 84 |
$o += 16; |
| 85 |
} else { |
| 86 |
$o += length($ascii); |
| 87 |
last; |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
$o = $old_o if $old_o; |
| 92 |
} |
| 93 |
|
| 94 |
sub x { |
| 95 |
my ($len,$format) = @_; |
| 96 |
|
| 97 |
my $bytes; |
| 98 |
read($fh, $bytes, $len); |
| 99 |
|
| 100 |
my $r_len = length($bytes); |
| 101 |
confess "read $r_len bytes, expected $len" if $len != $r_len; |
| 102 |
|
| 103 |
if ( $dump_amv ) { |
| 104 |
print "## raw $len bytes\n"; |
| 105 |
hex_dump( $bytes ); |
| 106 |
} |
| 107 |
|
| 108 |
if ( $bytes eq 'AMV_END_' ) { |
| 109 |
print "> end of file marker AMV_END_\n" if $dump_video; |
| 110 |
$d->{eof}++; |
| 111 |
return; |
| 112 |
} |
| 113 |
|
| 114 |
if ( $format ) { |
| 115 |
my @data = unpack($format, $bytes); |
| 116 |
print "## unpacked = ",dump(@data),"\n" if $debug; |
| 117 |
return @data; |
| 118 |
} else { |
| 119 |
return $bytes; |
| 120 |
} |
| 121 |
} |
| 122 |
|
| 123 |
sub next_part { |
| 124 |
my ( $expected_part, $expected_len, $skip ) = @_; |
| 125 |
my ( $part, $len ) = x(8,'A4V'); |
| 126 |
return unless $len; |
| 127 |
confess "not $expected_part but $part" if $expected_part ne $part; |
| 128 |
if ( $expected_len ) { |
| 129 |
confess "expected $expected_len bytes for $part got $len" if $len != $expected_len; |
| 130 |
} |
| 131 |
printf "## next_part %s - %d 0x%x bytes\n", $part, $len, $len if $debug; |
| 132 |
x($len) if $skip; |
| 133 |
return $len; |
| 134 |
} |
| 135 |
|
| 136 |
sub quality { |
| 137 |
my @table = @_; |
| 138 |
die "quantization matrice needs to have 64 bytes!" if $#table != 63; |
| 139 |
|
| 140 |
my $in = join('', map { chr($_) } @table ); |
| 141 |
my $out; |
| 142 |
|
| 143 |
foreach my $t ( @table ) { |
| 144 |
$t = int( ( $t * $jpeg_q ) / 100 ); |
| 145 |
$t = 255 if $t > 255; |
| 146 |
$out .= chr($t); |
| 147 |
} |
| 148 |
|
| 149 |
if ( $dump_video ) { |
| 150 |
print "## quantization table original\n"; |
| 151 |
hex_dump( $in ); |
| 152 |
print "## quantization table for $jpeg_q %\n"; |
| 153 |
hex_dump( $out ); |
| 154 |
} |
| 155 |
|
| 156 |
return $out; |
| 157 |
} |
| 158 |
|
| 159 |
sub mp3_frame { |
| 160 |
my $frame = join('', |
| 161 |
# Frame sync (all bits set) |
| 162 |
1 x 11 . |
| 163 |
# MPEG Audio version ID |
| 164 |
# 00 - MPEG Version 2.5 (unofficial) |
| 165 |
# 01 - reserved |
| 166 |
# 10 - MPEG Version 2 (ISO/IEC 13818-3) |
| 167 |
# 11 - MPEG Version 1 (ISO/IEC 11172-3) |
| 168 |
1,0, |
| 169 |
# Layer description |
| 170 |
# 00 - reserved |
| 171 |
# 01 - Layer III |
| 172 |
# 10 - Layer II |
| 173 |
# 11 - Layer I |
| 174 |
0,1, |
| 175 |
# Protection bit |
| 176 |
# 0 - Protected by CRC (16bit crc follows header) |
| 177 |
# 1 - Not protected |
| 178 |
0, |
| 179 |
# Bitrate index |
| 180 |
0,0,0,0, |
| 181 |
# Sampling rate frequency index (22050) |
| 182 |
0,0, |
| 183 |
# Padding bit |
| 184 |
# 0 - frame is not padded |
| 185 |
# 1 - frame is padded with one extra slot |
| 186 |
0, |
| 187 |
# Private bit |
| 188 |
0, |
| 189 |
# Channel Mode |
| 190 |
# 00 - Stereo |
| 191 |
# 01 - Joint stereo (Stereo) |
| 192 |
# 10 - Dual channel (2 mono channels) |
| 193 |
# 11 - Single channel (Mono) |
| 194 |
1,1, |
| 195 |
# Mode extension (Only if Joint stereo) |
| 196 |
0,0, |
| 197 |
# Copyright |
| 198 |
0, |
| 199 |
# Original |
| 200 |
0, |
| 201 |
# Emphasis |
| 202 |
# 00 - none |
| 203 |
# 01 - 50/15 ms |
| 204 |
# 10 - reserved |
| 205 |
# 11 - CCIT J.17 |
| 206 |
0,0, |
| 207 |
); |
| 208 |
|
| 209 |
die "frame must have 32 bits, not ", length($frame), " for $frame" if length($frame) != 32; |
| 210 |
|
| 211 |
my $bits = pack("b32", $frame); |
| 212 |
|
| 213 |
die "packed bits must be 4 bytes, not $bits" if length($bits) != 4; |
| 214 |
|
| 215 |
my $t = $frame; |
| 216 |
$t =~ s/(.{8})/$1 /g; |
| 217 |
warn "## mp3 frame frame = $t\n"; |
| 218 |
|
| 219 |
return $bits; |
| 220 |
} |
| 221 |
|
| 222 |
my @subframes; |
| 223 |
my $frame_nr = 1; |
| 224 |
|
| 225 |
# how many subframes to join into single frame? |
| 226 |
my $join_subframes = 0; |
| 227 |
|
| 228 |
sub mkjpg { |
| 229 |
my ($data) = @_; |
| 230 |
|
| 231 |
confess "no SOI marker in data" if substr($data,0,2) ne "\xFF\xD8"; |
| 232 |
confess "no EOI marker in data" if substr($data,-2,2) ne "\xFF\xD9"; |
| 233 |
$data = substr($data,2,-2); |
| 234 |
|
| 235 |
if ( $#subframes < ( $join_subframes - 1 ) ) { |
| 236 |
push @subframes, $data; |
| 237 |
print "## saved $frame_nr/", $#subframes + 1, " subframe of ", length($data), " bytes\n" if $debug; |
| 238 |
return; |
| 239 |
} |
| 240 |
|
| 241 |
my $w = $d->{amvh}->{width} || die "no width?"; |
| 242 |
my $h = $d->{amvh}->{height} || confess "no height?"; |
| 243 |
|
| 244 |
my $header = |
| 245 |
# Start of Image (SOI) marker |
| 246 |
"\xFF\xD8". |
| 247 |
# JFIF marker |
| 248 |
"\xFF\xE0". |
| 249 |
pack("nZ5CCCnnCC", |
| 250 |
16, # length |
| 251 |
'JFIF', # identifier (JFIF) |
| 252 |
1,1, # version |
| 253 |
0, # units (none) |
| 254 |
1,1, # X,Y density |
| 255 |
0,0, # X,Y thumbnail |
| 256 |
). |
| 257 |
"\xFF\xFE". |
| 258 |
"\x00\x3CCREATOR: amv dumper (compat. IJG JPEG v62), quality = 100\n". |
| 259 |
# quantization table (quaility=100%) |
| 260 |
"\xFF\xDB". |
| 261 |
"\x00\x43". |
| 262 |
# 8 bit values, table 1 |
| 263 |
"\x00". |
| 264 |
quality( |
| 265 |
0x10, 0x0B, 0x0C, 0x0E, 0x0C, 0x0A, 0x10, 0x0E, |
| 266 |
0x0D, 0x0E, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28, |
| 267 |
0x1A, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25, |
| 268 |
0x1D, 0x28, 0x3A, 0x33, 0x3D, 0x3C, 0x39, 0x33, |
| 269 |
0x38, 0x37, 0x40, 0x48, 0x5C, 0x4E, 0x40, 0x44, |
| 270 |
0x57, 0x45, 0x37, 0x38, 0x50, 0x6D, 0x51, 0x57, |
| 271 |
0x5F, 0x62, 0x67, 0x68, 0x67, 0x3E, 0x4D, 0x71, |
| 272 |
0x79, 0x70, 0x64, 0x78, 0x5C, 0x65, 0x67, 0x63, |
| 273 |
). |
| 274 |
"\xFF\xDB". |
| 275 |
"\x00\x43". |
| 276 |
# 8 bit values, table 1 |
| 277 |
"\x01". |
| 278 |
quality( |
| 279 |
0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2F, 0x1A, |
| 280 |
0x1A, 0x2F, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63, |
| 281 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 282 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 283 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 284 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 285 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 286 |
0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
| 287 |
). |
| 288 |
# start of frame |
| 289 |
"\xFF\xC0". |
| 290 |
pack("ncnncc9", |
| 291 |
17, # len |
| 292 |
8, # sample precision in bits |
| 293 |
$h,$w, # X,Y size |
| 294 |
3, # number of components |
| 295 |
1,0x22,0, # Component ID, H+V sampling factors, Quantization table number |
| 296 |
2,0x11,1, |
| 297 |
3,0x11,1, |
| 298 |
). |
| 299 |
# Define huffman table (section B.2.4.1) |
| 300 |
"\xFF\xC4". # Marker |
| 301 |
"\x00\x1F". # Length (31 bytes) |
| 302 |
"\x00". # DC luminance, table 0 |
| 303 |
"\x00\x01\x05\x01\x01\x01\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00". |
| 304 |
"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B". |
| 305 |
# Define huffman table (section B.2.4.1) |
| 306 |
"\xFF\xC4". # Marker |
| 307 |
"\x00\xB5". # Length (181 bytes) |
| 308 |
"\x10". # AC luminance, table 0 |
| 309 |
"\x00\x02\x01\x03\x03\x02\x04\x03\x05\x05\x04\x04\x00\x00\x01\x7D". |
| 310 |
"\x01\x02\x03\x00\x04\x11\x05\x12". |
| 311 |
"\x21\x31\x41\x06\x13\x51\x61\x07\x22\x71\x14\x32". |
| 312 |
"\x81\x91\xA1\x08\x23\x42\xB1\xC1\x15\x52\xD1\xF0". |
| 313 |
"\x24\x33\x62\x72\x82\x09\x0A\x16\x17\x18\x19\x1A". |
| 314 |
"\x25\x26\x27\x28\x29\x2A\x34\x35\x36\x37\x38\x39". |
| 315 |
"\x3A\x43\x44\x45\x46\x47\x48\x49\x4A\x53\x54\x55". |
| 316 |
"\x56\x57\x58\x59\x5A\x63\x64\x65\x66\x67\x68\x69". |
| 317 |
"\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x83\x84\x85". |
| 318 |
"\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96\x97\x98". |
| 319 |
"\x99\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xB2". |
| 320 |
"\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xC2\xC3\xC4\xC5". |
| 321 |
"\xC6\xC7\xC8\xC9\xCA\xD2\xD3\xD4\xD5\xD6\xD7\xD8". |
| 322 |
"\xD9\xDA\xE1\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9\xEA". |
| 323 |
"\xF1\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA". |
| 324 |
# Define huffman table (section B.2.4.1) |
| 325 |
"\xFF\xC4". # Marker |
| 326 |
"\x00\x1F". # Length (31 bytes) |
| 327 |
"\x01". # DC chrominance, table 1 |
| 328 |
"\x00\x03\x01\x01\x01\x01\x01\x01\x01\x01\x01\x00". |
| 329 |
"\x00\x00\x00\x00". |
| 330 |
"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B". |
| 331 |
#/* Define huffman table (section B.2.4.1) */ |
| 332 |
"\xFF\xC4". # Marker |
| 333 |
"\x00\xB5". # Length (181 bytes) |
| 334 |
"\x11". # AC chrominance, table 1 |
| 335 |
"\x00\x02\x01\x02\x04\x04\x03\x04\x07\x05\x04\x04". |
| 336 |
"\x00\x01\x02\x77". |
| 337 |
"\x00\x01\x02\x03\x11\x04\x05\x21". |
| 338 |
"\x31\x06\x12\x41\x51\x07\x61\x71\x13\x22\x32\x81". |
| 339 |
"\x08\x14\x42\x91\xA1\xB1\xC1\x09\x23\x33\x52\xF0". |
| 340 |
"\x15\x62\x72\xD1\x0A\x16\x24\x34\xE1\x25\xF1\x17". |
| 341 |
"\x18\x19\x1A\x26\x27\x28\x29\x2A\x35\x36\x37\x38". |
| 342 |
"\x39\x3A\x43\x44\x45\x46\x47\x48\x49\x4A\x53\x54". |
| 343 |
"\x55\x56\x57\x58\x59\x5A\x63\x64\x65\x66\x67\x68". |
| 344 |
"\x69\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x82\x83". |
| 345 |
"\x84\x85\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96". |
| 346 |
"\x97\x98\x99\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9". |
| 347 |
"\xAA\xB2\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xC2\xC3". |
| 348 |
"\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xD2\xD3\xD4\xD5\xD6". |
| 349 |
"\xD7\xD8\xD9\xDA\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9". |
| 350 |
"\xEA\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA". |
| 351 |
# Start of Scan marker |
| 352 |
"\xFF\xDA". |
| 353 |
pack("nC10", |
| 354 |
12, # length |
| 355 |
3, # number of components |
| 356 |
1,0x00, # Scan 1: use DC/AC huff tables 0/0 |
| 357 |
2,0x11, # Scan 2: use DC/AC huff tables 1/1 |
| 358 |
3,0x11, # Scan 3: use DC/AC huff tables 1/1 |
| 359 |
0,0x3f, # Ss, Se |
| 360 |
0, # Ah, Ai (not used) |
| 361 |
); |
| 362 |
|
| 363 |
if ( $dump_jpeg ) { |
| 364 |
print "## created JPEG header...\n"; |
| 365 |
hex_dump( $header, 0 ); |
| 366 |
} |
| 367 |
|
| 368 |
my $frame = join('', @subframes ) . $data; |
| 369 |
@subframes = (); |
| 370 |
|
| 371 |
my $path = sprintf("$dump_dir/%04d.jpg", $frame_nr ); |
| 372 |
|
| 373 |
my $fh; |
| 374 |
if ( $jpegtran ) { |
| 375 |
open($fh, '|-', "jpegtran $jpegtran > $path") || die "can't create $path: $!"; |
| 376 |
} else { |
| 377 |
open($fh, '>', $path) || die "can't create $path: $!"; |
| 378 |
} |
| 379 |
|
| 380 |
if ( ! $no_jpeg_header ) { |
| 381 |
print $fh $header . $frame . "\xFF\xD9" || die "can't write jpeg $path: $!"; |
| 382 |
} else { |
| 383 |
print $fh $frame || die "can't write raw jpeg $path: $!"; |
| 384 |
} |
| 385 |
close $fh || die "can't close $path: $!"; |
| 386 |
print ">> created $frame_nr ", $no_jpeg_header ? 'raw' : '', " jpeg $path ", -s $path, " bytes\n" if $verbose; |
| 387 |
} |
| 388 |
|
| 389 |
my ( $riff, $amv ) = x(12, 'Z4x4Z4'); |
| 390 |
die "$path not RIFF but $riff" if $riff ne 'RIFF'; |
| 391 |
die "$path not AMV but $amv" if $amv ne 'AMV '; |
| 392 |
|
| 393 |
my $apath = "$dump_dir/audio.wav"; |
| 394 |
open(my $audio_fh, '>', $apath) || die "can't open audio file $apath: $!"; |
| 395 |
|
| 396 |
print $audio_fh pack 'a4Va4a4VvvVVv4', ( |
| 397 |
# header 'RIFF', size |
| 398 |
'RIFF',-1, |
| 399 |
# type: 'WAVE' |
| 400 |
'WAVE', |
| 401 |
'fmt ',0x14, |
| 402 |
# format: DVI (IMA) ADPCM Wave Type |
| 403 |
0x11, |
| 404 |
# channels |
| 405 |
1, |
| 406 |
# samples/sec |
| 407 |
22050, |
| 408 |
# avg. bytes/sec (for esimation) |
| 409 |
11567, |
| 410 |
# block align (size of block) |
| 411 |
0x800, |
| 412 |
# bits per sample (mono data) |
| 413 |
4, |
| 414 |
# cbSize (ADPCM with 7 soefficient pairs) |
| 415 |
2, |
| 416 |
# nSamplesPerBlock |
| 417 |
# (((nBlockAlign - (7 * nChannels)) * 8) / (wBitsPerSample * nChannels)) + 2 |
| 418 |
0x0ff9, |
| 419 |
); |
| 420 |
|
| 421 |
print $audio_fh pack 'a4VVa4V', ( |
| 422 |
# time length of the data in samples |
| 423 |
'fact',4, |
| 424 |
220500, |
| 425 |
# |
| 426 |
'data',-1, |
| 427 |
); |
| 428 |
|
| 429 |
my $riff_header_len = tell($audio_fh); |
| 430 |
|
| 431 |
while ( ! defined($d->{eof}) ) { |
| 432 |
my ( $list, $name ) = x(12,'A4x4A4'); |
| 433 |
die "not LIST but $list" if $list ne 'LIST'; |
| 434 |
print "< $list * $name\n" if $verbose; |
| 435 |
|
| 436 |
if ( $name eq 'hdrl' ) { |
| 437 |
|
| 438 |
my $len = next_part( 'amvh', hex(38) ); |
| 439 |
|
| 440 |
my @names = ( qw/ms_per_frame width height fps ss mm hh/ ); |
| 441 |
my $h; |
| 442 |
map { |
| 443 |
my $v = $_; |
| 444 |
my $n = shift @names || die "no more names?"; |
| 445 |
$h->{$n} = $v; |
| 446 |
} x($len, 'Vx28VVVx8CCv'); |
| 447 |
|
| 448 |
printf "## %s %d*%d %s fps (%d ms/frame) %02d:%02d:%02d\n", |
| 449 |
$path, |
| 450 |
$h->{width}, $h->{height}, $h->{fps}, $h->{ms_per_frame}, |
| 451 |
$h->{hh}, $h->{mm}, $h->{ss}; |
| 452 |
|
| 453 |
$d->{amvh} = $h; |
| 454 |
|
| 455 |
} elsif ( $name eq 'strl' ) { |
| 456 |
|
| 457 |
next_part( 'strh', 0, 1 ); |
| 458 |
next_part( 'strf', 0, 1 ); |
| 459 |
|
| 460 |
} elsif ( $name eq 'movi' ) { |
| 461 |
|
| 462 |
while (1) { |
| 463 |
my $frame = $d->{movi}++; |
| 464 |
|
| 465 |
my $len = next_part( '00dc' ); |
| 466 |
last unless $len; |
| 467 |
printf "<< %s 00dc - part %d jpeg %d 0x%x bytes\n", $name, $frame, $len, $len if $verbose; |
| 468 |
mkjpg( x($len) ); |
| 469 |
|
| 470 |
$len = next_part( '01wb' ); |
| 471 |
printf "<< %s 01wb - part %d audio %d 0x%x bytes\n", $name, $frame, $len, $len if $verbose; |
| 472 |
|
| 473 |
my $audio_frame = x( $len ); |
| 474 |
|
| 475 |
if ( $dump_audio ) { |
| 476 |
printf "#### dumping audio frame %d 0x%x bytes\n", length($audio_frame), length($audio_frame); |
| 477 |
hex_dump( $audio_frame ); |
| 478 |
} |
| 479 |
|
| 480 |
# remove 8 bytes of something |
| 481 |
$audio_frame = substr( $audio_frame, 8 ); |
| 482 |
|
| 483 |
if ( length($audio_frame) % 2 == 0 ) { |
| 484 |
print "#### even sized frame!"; |
| 485 |
# $audio_frame = substr( $audio_frame, 0, -1 ); |
| 486 |
} |
| 487 |
|
| 488 |
# print $audio_fh mp3_frame; |
| 489 |
print $audio_fh $audio_frame || die "can't write audio frame in $apath: $!"; |
| 490 |
|
| 491 |
$frame_nr++; |
| 492 |
}; |
| 493 |
|
| 494 |
} else { |
| 495 |
die "unknown $list $name"; |
| 496 |
} |
| 497 |
} |
| 498 |
|
| 499 |
my $cmd = "ffmpeg -i $dump_dir/%04d.jpg -r 16 -y $dump_avi"; |
| 500 |
system($cmd) == 0 || die "can't convert frames to avi using $cmd: $!"; |
| 501 |
|
| 502 |
my $size = tell($audio_fh); |
| 503 |
warn "## wav file size: $size\n"; |
| 504 |
|
| 505 |
seek( $audio_fh, 4, 0 ); |
| 506 |
print $audio_fh pack("V", $size - 8); |
| 507 |
seek( $audio_fh, $riff_header_len - 4, 0 ); |
| 508 |
print $audio_fh pack("V", $size - $riff_header_len); |
| 509 |
|
| 510 |
close($audio_fh) || die "can't close audio file $apath: $!"; |
| 511 |
|
| 512 |
print ">>>> created $frame_nr frames $dump_avi ", -s $dump_avi, " and $apath ", -s $apath, "\n"; |
Parent Directory
| 
Revision Log