/[amv]/amv.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 13 - (show annotations)
Fri Jul 20 16:55:33 2007 UTC (16 years, 8 months ago) by dpavlin
File MIME type: text/plain
File size: 14109 byte(s)
tables from cmt-4.0 -- also non-working :-(
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
13 use strict;
14
15 use Data::Dump qw/dump/;
16 use Carp qw/confess/;
17 use File::Path;
18
19 my $dump = 0;
20 my $debug = 0;
21
22 my $path = shift @ARGV || die "usage: $0 movie.amv\n";
23
24 my $dump_dir = '/tmp/dump/';
25 rmtree $dump_dir if -e $dump_dir;
26 mkpath $dump_dir || die "can't create $dump_dir: $!";
27
28 open(my $fh, '<', $path) || die "can't open $path: $!";
29
30 # offset in file
31 my $o = 0;
32
33 # shared data hash
34 my $d;
35
36 sub hex_dump {
37 return unless $dump;
38
39 my ( $bytes, $offset ) = @_;
40 return unless $bytes;
41
42 my $old_o;
43 if (defined($offset)) {
44 $old_o = $o;
45 $o = $offset;
46 }
47
48 my $ascii = $bytes;
49 $ascii =~ s/\W/./gs;
50 my $hex = uc( unpack('h*', $bytes) );
51 $hex =~ s/(..)/$1 /g;
52 # calculate number of characters for offset
53 #my $d = length( sprintf("%x",length($bytes)) );
54 my $d = 4;
55 my $prefix = '#.';
56 while ( $hex =~ s/^((?:\w\w\s){1,16})// ) {
57 printf "$prefix %0${d}x | %-48s| %s\n", $o, $1, substr( $ascii, 0, 16 );
58 $prefix = '##';
59 if ( length($ascii) >= 16 ) {
60 $ascii = substr( $ascii, 16 );
61 $o += 16;
62 } else {
63 $o += length($ascii);
64 last;
65 }
66 }
67
68 $o = $old_o if $old_o;
69 }
70
71 sub x {
72 my ($len,$format) = @_;
73
74 my $bytes;
75 read($fh, $bytes, $len);
76
77 my $r_len = length($bytes);
78 confess "read $r_len bytes, expected $len" if $len != $r_len;
79
80 hex_dump( $bytes );
81
82 if ( $bytes eq 'AMV_END_' ) {
83 warn "> end of file marker AMV_END_\n";
84 $d->{eof}++;
85 return;
86 }
87
88 if ( $format ) {
89 my @data = unpack($format, $bytes);
90 warn "## unpacked = ",dump(@data),"\n" if $debug;
91 return @data;
92 } else {
93 return $bytes;
94 }
95 }
96
97 sub next_part {
98 my ( $expected_part, $expected_len, $skip ) = @_;
99 my ( $part, $len ) = x(8,'A4V');
100 return unless $len;
101 confess "not $expected_part but $part" if $expected_part ne $part;
102 if ( $expected_len ) {
103 confess "expected $expected_len bytes for $part got $len" if $len != $expected_len;
104 }
105 printf "<< %s - %d 0x%x bytes\n", $part, $len, $len;
106 x($len) if $skip;
107 return $len;
108 }
109
110 sub huffman {
111
112 # JPEG DHT Segment for YCrCb omitted from MJPG data
113 return
114 "\xFF\xC4\x01\xA2" .
115 "\x00\x00\x01\x05\x01\x01\x01\x01\x01\x01\x00\x00\x00\x00\x00" .
116 "\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x01" .
117 "\x00\x03\x01\x01\x01\x01\x01\x01\x01\x01\x01\x00\x00\x00\x00" .
118 "\x00\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x10\x00" .
119 "\x02\x01\x03\x03\x02\x04\x03\x05\x05\x04\x04\x00\x00\x01\x7D" .
120 "\x01\x02\x03\x00\x04\x11\x05\x12\x21\x31\x41\x06\x13\x51\x61" .
121 "\x07\x22\x71\x14\x32\x81\x91\xA1\x08\x23\x42\xB1\xC1\x15\x52" .
122 "\xD1\xF0\x24\x33\x62\x72\x82\x09\x0A\x16\x17\x18\x19\x1A\x25" .
123 "\x26\x27\x28\x29\x2A\x34\x35\x36\x37\x38\x39\x3A\x43\x44\x45" .
124 "\x46\x47\x48\x49\x4A\x53\x54\x55\x56\x57\x58\x59\x5A\x63\x64" .
125 "\x65\x66\x67\x68\x69\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x83" .
126 "\x84\x85\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96\x97\x98\x99" .
127 "\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xB2\xB3\xB4\xB5\xB6" .
128 "\xB7\xB8\xB9\xBA\xC2\xC3\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xD2\xD3" .
129 "\xD4\xD5\xD6\xD7\xD8\xD9\xDA\xE1\xE2\xE3\xE4\xE5\xE6\xE7\xE8" .
130 "\xE9\xEA\xF1\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA\x11\x00\x02" .
131 "\x01\x02\x04\x04\x03\x04\x07\x05\x04\x04\x00\x01\x02\x77\x00" .
132 "\x01\x02\x03\x11\x04\x05\x21\x31\x06\x12\x41\x51\x07\x61\x71" .
133 "\x13\x22\x32\x81\x08\x14\x42\x91\xA1\xB1\xC1\x09\x23\x33\x52" .
134 "\xF0\x15\x62\x72\xD1\x0A\x16\x24\x34\xE1\x25\xF1\x17\x18\x19" .
135 "\x1A\x26\x27\x28\x29\x2A\x35\x36\x37\x38\x39\x3A\x43\x44\x45" .
136 "\x46\x47\x48\x49\x4A\x53\x54\x55\x56\x57\x58\x59\x5A\x63\x64" .
137 "\x65\x66\x67\x68\x69\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x82" .
138 "\x83\x84\x85\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96\x97\x98" .
139 "\x99\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xB2\xB3\xB4\xB5" .
140 "\xB6\xB7\xB8\xB9\xBA\xC2\xC3\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xD2" .
141 "\xD3\xD4\xD5\xD6\xD7\xD8\xD9\xDA\xE2\xE3\xE4\xE5\xE6\xE7\xE8" .
142 "\xE9\xEA\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA";
143
144 }
145
146 sub mkjpg {
147 my ($path,$data) = @_;
148 open(my $fh, '>', $path) || die "can't create $path: $!";
149
150 confess "no SOI marker in data" if substr($data,0,2) ne "\xFF\xD8";
151 $data = substr($data,2);
152
153 my $header =
154 "\xFF\xD8". # Start of Image (SOI) marker
155 #------------------------------------------------------------------
156 "\xFF\xE0". # JFIF marker
157 pack("nZ5CCCnnCC",
158 16, # length
159 'JFIF', # identifier
160 1,1, # version
161 0, # units (none)
162 1,1, # X,Y density
163 0,0, # X,Y thumbnail
164 ).
165 #------------------------------------------------------------------
166 "\xFF\xC0". # Start of frame
167 pack("ncnncc9",
168 17, # len
169 8, # sample precision in bits
170 120,160, # X,Y size
171 3, # number of components
172 1,0x21,0, # Component ID, H+V sampling factors, Quantization table number
173 2,0x11,1,
174 3,0x11,1,
175 ).
176 #------------------------------------------------------------------
177 "\xFF\xDB". # Define Quantization table marker
178 "\x00\x84". # len
179 "\x00". # 8 bit values, (byte) table 0
180 "\x10\x0B\x0C\x0E\x0C".
181 "\x0A\x10\x0E\x0D\x0E".
182 "\x12\x11\x10\x13\x18".
183 "\x28\x1A\x18\x16\x16".
184 "\x18\x31\x23\x25\x1D".
185 "\x28\x3A\x33\x3D\x3C".
186 "\x39\x33\x38\x37\x40".
187 "\x48\x5C\x4E\x40\x44".
188 "\x57\x45\x37\x38\x50".
189 "\x6D\x51\x57\x5F\x62".
190 "\x67\x68\x67\x3E\x4D".
191 "\x71\x79\x70\x64\x78".
192 "\x5C\x65\x67\x63".
193 "\x01". # 8 bit values, (byte) table 1
194 "\x11\x12\x12\x18\x15".
195 "\x18\x2F\x1A\x1A\x2F".
196 "\x63\x42\x38\x42\x63".
197 "\x63\x63\x63\x63\x63".
198 "\x63\x63\x63\x63\x63".
199 "\x63\x63\x63\x63\x63".
200 "\x63\x63\x63\x63\x63".
201 "\x63\x63\x63\x63\x63".
202 "\x63\x63\x63\x63\x63".
203 "\x63\x63\x63\x63\x63".
204 "\x63\x63\x63\x63\x63".
205 "\x63\x63\x63\x63\x63".
206 "\x63\x63\x63\x63".
207 #------------------------------------------------------------------
208 # huffman("\x00"). # 0 DC
209 # huffman("\x01"). # 1 DC
210 # huffman("\x10"). # 0 AC
211 # huffman("\x11"). # 1 AC
212 #------------------------------------------------------------------
213 # Define huffman table (section B.2.4.1)
214 "\xFF\xC4". # Marker
215 "\x00\x1F". # Length (31 bytes)
216 "\x00". # DC, (byte) table 0
217 "\x00\x01\x05\x01\x01".
218 "\x01\x01\x01\x01\x00".
219 "\x00\x00\x00\x00\x00".
220 "\x00\x00\x01\x02\x03".
221 "\x04\x05\x06\x07\x08".
222 "\x09\x0A\x0B".
223 # Define huffman table (section B.2.4.1)
224 "\xFF\xC4". # Marker
225 "\x00\xB5". # Length (181 bytes)
226 "\x10". # AC, (byte) table 0
227 "\x00\x02\x01\x03\x03".
228 "\x02\x04\x03\x05\x05".
229 "\x04\x04\x00\x00\x01".
230 "\x7D\x01\x02\x03\x00".
231 "\x04\x11\x05\x12\x21".
232 "\x31\x41\x06\x13\x51".
233 "\x61\x07\x22\x71\x14".
234 "\x32\x81\x91\xA1\x08".
235 "\x23\x42\xB1\xC1\x15".
236 "\x52\xD1\xF0\x24\x33".
237 "\x62\x72\x82\x09\x0A".
238 "\x16\x17\x18\x19\x1A".
239 "\x25\x26\x27\x28\x29".
240 "\x2A\x34\x35\x36\x37".
241 "\x38\x39\x3A\x43\x44".
242 "\x45\x46\x47\x48\x49".
243 "\x4A\x53\x54\x55\x56".
244 "\x57\x58\x59\x5A\x63".
245 "\x64\x65\x66\x67\x68".
246 "\x69\x6A\x73\x74\x75".
247 "\x76\x77\x78\x79\x7A".
248 "\x83\x84\x85\x86\x87".
249 "\x88\x89\x8A\x92\x93".
250 "\x94\x95\x96\x97\x98".
251 "\x99\x9A\xA2\xA3\xA4".
252 "\xA5\xA6\xA7\xA8\xA9".
253 "\xAA\xB2\xB3\xB4\xB5".
254 "\xB6\xB7\xB8\xB9\xBA".
255 "\xC2\xC3\xC4\xC5\xC6".
256 "\xC7\xC8\xC9\xCA\xD2".
257 "\xD3\xD4\xD5\xD6\xD7".
258 "\xD8\xD9\xDA\xE1\xE2".
259 "\xE3\xE4\xE5\xE6\xE7".
260 "\xE8\xE9\xEA\xF1\xF2".
261 "\xF3\xF4\xF5\xF6\xF7".
262 "\xF8\xF9\xFA".
263 # Define huffman table (section B.2.4.1)
264 "\xFF\xC4". # Marker
265 "\x00\x1F". # Length (31 bytes)
266 "\x01". # DC, (byte) table 1
267 "\x00\x03\x01\x01\x01".
268 "\x01\x01\x01\x01\x01".
269 "\x01\x00\x00\x00\x00".
270 "\x00\x00\x01\x02\x03".
271 "\x04\x05\x06\x07\x08".
272 "\x09\x0A\x0B".
273 # Define huffman table (section B.2.4.1)
274 "\xFF\xC4". # Marker
275 "\x00\xB5". # Length (181 bytes)
276 "\x11". # AC, (byte) table 1
277 "\x00\x02\x01\x02\x04".
278 "\x04\x03\x04\x07\x05".
279 "\x04\x04\x00\x01\x02".
280 "\x77\x00\x01\x02\x03".
281 "\x11\x04\x05\x21\x31".
282 "\x06\x12\x41\x51\x07".
283 "\x61\x71\x13\x22\x32".
284 "\x81\x08\x14\x42\x91".
285 "\xA1\xB1\xC1\x09\x23".
286 "\x33\x52\xF0\x15\x62".
287 "\x72\xD1\x0A\x16\x24".
288 "\x34\xE1\x25\xF1\x17".
289 "\x18\x19\x1A\x26\x27".
290 "\x28\x29\x2A\x35\x36".
291 "\x37\x38\x39\x3A\x43".
292 "\x44\x45\x46\x47\x48".
293 "\x49\x4A\x53\x54\x55".
294 "\x56\x57\x58\x59\x5A".
295 "\x63\x64\x65\x66\x67".
296 "\x68\x69\x6A\x73\x74".
297 "\x75\x76\x77\x78\x79".
298 "\x7A\x82\x83\x84\x85".
299 "\x86\x87\x88\x89\x8A".
300 "\x92\x93\x94\x95\x96".
301 "\x97\x98\x99\x9A\xA2".
302 "\xA3\xA4\xA5\xA6\xA7".
303 "\xA8\xA9\xAA\xB2\xB3".
304 "\xB4\xB5\xB6\xB7\xB8".
305 "\xB9\xBA\xC2\xC3\xC4".
306 "\xC5\xC6\xC7\xC8\xC9".
307 "\xCA\xD2\xD3\xD4\xD5".
308 "\xD6\xD7\xD8\xD9\xDA".
309 "\xE2\xE3\xE4\xE5\xE6".
310 "\xE7\xE8\xE9\xEA\xF2".
311 "\xF3\xF4\xF5\xF6\xF7".
312 "\xF8\xF9\xFA".
313 #------------------------------------------------------------------
314 "\xFF\xDA". # Start of Scan marker
315 pack("nC11",
316 12, # length
317 3, # number of components
318 1,0x00, # Scan 1: use DC/AC huff tables 0/0
319 2,0x11, # Scan 2: use DC/AC huff tables 1/1
320 3,0x11, # Scan 3: use DC/AC huff tables 1/1
321 0,0x3f, # Ss, Se
322 0, # Ah, Ai (not used)
323 );
324 #------------------------------------------------------------------
325
326 my $header =
327 # SOI
328 "\xFF\xD8".
329 # JFIF
330 "\xFF\xE0".
331 "\x00\x0e\x41\x56\x49\x31\x00\x00\x00\x00\x00\x00\x00\x00".
332 "\xff\xDD\x00\x04\x00\x00".
333 # quantization table
334 "\xFF\xDB".
335 "\x00\x43\x00\x21\x16\x18".
336 "\x1D\x18\x14\x21\x1D\x1B\x1D\x25".
337 "\x23\x21\x27\x31\x53\x36\x31\x2D".
338 "\x2D\x31\x65\x48\x4c\x3c\x53\x78".
339 "\x6a\x7e\x7c\x76\x6a\x74\x72\x85".
340 "\x95\xbf\xa2\x85\x8d\xb4\x8f\x72".
341 "\x74\xa6\xe2\xa8\xb4\xc5\xcb\xd6".
342 "\xd8\xd6\x80\xa0\xeb\xfb\xe8\xd0".
343 "\xf9\xbf\xd2\xd6\xcd".
344 # quantization table
345 "\xff\xdb".
346 "\x00\x43\x01\x23\x25\x25\x31\x2b\x31".
347 "\x61\x36\x36\x61\xcd\x89\x74\x89".
348 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
349 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
350 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
351 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
352 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
353 "\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd".
354 "\xcd\xcd".
355 # Define huffman table (section B.2.4.1)
356 "\xFF\xC4". # Marker
357 "\x00\x1F". # Length (31 bytes)
358 "\x00". # DC, table 0
359 "\x00\x01\x05\x01\x01\x01\x01\x01\x01\x00\x00\x00".
360 "\x00\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07".
361 "\x08\x09\x0A\x0B".
362 # Define huffman table (section B.2.4.1)
363 "\xFF\xC4". # Marker
364 "\x00\xB5". # Length (181 bytes)
365 "\x10". # AC, table 0
366 "\x00\x02\x01\x03\x03\x02\x04\x03\x05\x05\x04\x04".
367 "\x00\x00\x01\x7D\x01\x02\x03\x00\x04\x11\x05\x12".
368 "\x21\x31\x41\x06\x13\x51\x61\x07\x22\x71\x14\x32".
369 "\x81\x91\xA1\x08\x23\x42\xB1\xC1\x15\x52\xD1\xF0".
370 "\x24\x33\x62\x72\x82\x09\x0A\x16\x17\x18\x19\x1A".
371 "\x25\x26\x27\x28\x29\x2A\x34\x35\x36\x37\x38\x39".
372 "\x3A\x43\x44\x45\x46\x47\x48\x49\x4A\x53\x54\x55".
373 "\x56\x57\x58\x59\x5A\x63\x64\x65\x66\x67\x68\x69".
374 "\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x83\x84\x85".
375 "\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96\x97\x98".
376 "\x99\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xB2".
377 "\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xC2\xC3\xC4\xC5".
378 "\xC6\xC7\xC8\xC9\xCA\xD2\xD3\xD4\xD5\xD6\xD7\xD8".
379 "\xD9\xDA\xE1\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9\xEA".
380 "\xF1\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA".
381 # Define huffman table (section B.2.4.1)
382 "\xFF\xC4". # /* Marker */
383 "\x00\x1F". # /* Length (31 bytes) */
384 "\x01". #/* DC". table 1 */
385 "\x00\x03\x01\x01\x01\x01\x01\x01\x01\x01\x01\x00".
386 "\x00\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07".
387 "\x08\x09\x0A\x0B".
388 #/* Define huffman table (section B.2.4.1) */
389 "\xFF\xC4". # /* Marker */
390 "\x00\xB5". # /* Length (181 bytes) */
391 "\x11". #/* AC". table 1 */
392 "\x00\x02\x01\x02\x04\x04\x03\x04\x07\x05\x04\x04".
393 "\x00\x01\x02\x77\x00\x01\x02\x03\x11\x04\x05\x21".
394 "\x31\x06\x12\x41\x51\x07\x61\x71\x13\x22\x32\x81".
395 "\x08\x14\x42\x91\xA1\xB1\xC1\x09\x23\x33\x52\xF0".
396 "\x15\x62\x72\xD1\x0A\x16\x24\x34\xE1\x25\xF1\x17".
397 "\x18\x19\x1A\x26\x27\x28\x29\x2A\x35\x36\x37\x38".
398 "\x39\x3A\x43\x44\x45\x46\x47\x48\x49\x4A\x53\x54".
399 "\x55\x56\x57\x58\x59\x5A\x63\x64\x65\x66\x67\x68".
400 "\x69\x6A\x73\x74\x75\x76\x77\x78\x79\x7A\x82\x83".
401 "\x84\x85\x86\x87\x88\x89\x8A\x92\x93\x94\x95\x96".
402 "\x97\x98\x99\x9A\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9".
403 "\xAA\xB2\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xC2\xC3".
404 "\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xD2\xD3\xD4\xD5\xD6".
405 "\xD7\xD8\xD9\xDA\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9".
406 "\xEA\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA".
407 # start of frame
408 "\xff\xc0".
409 "\x00\x11\x08".
410 pack("nn", 120, 160).
411 "\x03\x01\x21\x00\x02\x11\x01\x03\x11\x01".
412 #
413 "\xff\xda".
414 "\x00\x0c\x03\x01\x00\x02\x11\x03\x11".
415 "\x00\x3f\x00";
416
417 if ( $dump ) {
418 warn "## created JPEG header...\n";
419 hex_dump( $header, 0 );
420 }
421
422 print $fh $header || die "can't write header into $path: $!";
423 print $fh $data || die "can't write frame into $path: $!";
424 close $fh || die "can't close $path: $!";
425 print ">> created $path ", -s $path, " bytes\n";
426 }
427
428 my ( $riff, $amv ) = x(12, 'Z4x4Z4');
429 die "$path not RIFF but $riff" if $riff ne 'RIFF';
430 die "$path not AMV but $amv" if $amv ne 'AMV ';
431
432 while ( ! defined($d->{eof}) ) {
433 my ( $list, $name ) = x(12,'A4x4A4');
434 die "not LIST but $list" if $list ne 'LIST';
435 print "< $list * $name\n";
436
437 if ( $name eq 'hdrl' ) {
438
439 my $len = next_part( 'amvh', hex(38) );
440
441 my @names = ( qw/ms_per_frame width height fps ss mm hh/ );
442 my $h;
443 map {
444 my $v = $_;
445 my $n = shift @names || die "no more names?";
446 $h->{$n} = $v;
447 } x($len, 'Vx28VVVx8CCv');
448
449 printf "## %s %d*%d %s fps (%d ms/frame) %02d:%02d:%02d\n",
450 $path,
451 $h->{width}, $h->{height}, $h->{fps}, $h->{ms_per_frame},
452 $h->{hh}, $h->{mm}, $h->{ss};
453
454 $d->{amvh} = $h;
455
456 } elsif ( $name eq 'strl' ) {
457
458 next_part( 'strh', 0, 1 );
459 next_part( 'strf', 0, 1 );
460
461 } elsif ( $name eq 'movi' ) {
462
463 while (1) {
464 my $frame = $d->{movi}++;
465
466 my $len = next_part( '00dc' );
467 last unless $len;
468 printf "<< %s 00dc - frame %d jpeg %d 0x%x bytes\n", $name, $frame, $len, $len;
469 mkjpg( sprintf("$dump_dir/%03d.jpg", $frame ), x($len) );
470
471 $len = next_part( '01wb', 0, 1 );
472 printf "<< %s 01wb - frame %d audio %d 0x%x bytes\n", $name, $frame, $len, $len;
473 };
474
475 } else {
476 die "unknown $list $name";
477 }
478 }

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