Adobe 65018518 User Guide - Page 430

Troubleshooting video, SWF application authoring guidelines, About SWF application guidelines

Page 430 highlights

USING FLASH CS4 PROFESSIONAL 425 Best practices Video keyframes are different from keyframes in Flash. Each keyframe is a frame that draws when the video is compressed, so the more frequent your keyframes are the better quality the footage is. More keyframes also mean a larger file size. If you choose 30, a video keyframe draws every 30 frames. If you choose 15, the quality is higher because a keyframe draws ever 15 frames and the pixels in your footage are more accurate to the original. • Reduce noise. Noise (scattered pixels in your footage) increases file size. Reduce noise using your video editor, to reduce the video file size. Using more solid colors in your video reduces its file size. When you put FLV files on a server, they use the video/x-flv FLV mime type. If you have difficulty viewing FLV files after you upload your files, check that this mime type is set on your server. FLV files are binary, and some applications that you build might require that the application/octet-stream subtype is also set. For more information on the Flash Player specifications, see www.adobe.com/go/flashfileformat. Troubleshooting video You can create an application and then encounter problems after you upload it to your server. • Check that your Flash Player version is correct. For example, if you encoded your files using On2 codec, you need Flash Player 8 or later installed for the browsers you use to view your Flash content. Note: For Flash Player and FLV compatibility, see About using FLV video in Learning ActionScript 2.0 in Adobe Flash. • Check that your server supports the FLV mime type. For more information on FLV files on a server, see Configuring your server for FLV files in Learning ActionScript 2.0 in Adobe Flash. • Check security guidelines. If you load FLV files from another server, make sure that you have the proper files or code in place to load from that external server. For information on policy files, see Server-side policy files for permitting access to data in Learning ActionScript 2.0 in Adobe Flash. For information about loading and security, see Understanding security in Learning ActionScript 2.0 in Adobe Flash. • Check your target paths to your video are correct. If you use relative paths (such as /video/water.flv), try using absolute paths (such as http://www.helpexamples.com/flash/video/water.flv). If your application doesn't work as a relative path, but does work as an absolute path, correct the relative path. SWF application authoring guidelines About SWF application guidelines The best way to create Flash applications depends on the application you create and the technology that you are using to build the application. Updated 5 March 2009

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385
  • 386
  • 387
  • 388
  • 389
  • 390
  • 391
  • 392
  • 393
  • 394
  • 395
  • 396
  • 397
  • 398
  • 399
  • 400
  • 401
  • 402
  • 403
  • 404
  • 405
  • 406
  • 407
  • 408
  • 409
  • 410
  • 411
  • 412
  • 413
  • 414
  • 415
  • 416
  • 417
  • 418
  • 419
  • 420
  • 421
  • 422
  • 423
  • 424
  • 425
  • 426
  • 427
  • 428
  • 429
  • 430
  • 431
  • 432
  • 433
  • 434
  • 435
  • 436
  • 437
  • 438
  • 439
  • 440
  • 441
  • 442
  • 443
  • 444
  • 445
  • 446
  • 447
  • 448
  • 449
  • 450
  • 451
  • 452
  • 453
  • 454
  • 455
  • 456
  • 457
  • 458
  • 459
  • 460
  • 461
  • 462
  • 463
  • 464
  • 465
  • 466
  • 467
  • 468
  • 469
  • 470
  • 471
  • 472
  • 473
  • 474

425
USING FLASH CS4 PROFESSIONAL
Best practices
Video keyframes are different from keyframes in Flash. Each keyframe is a frame that draws when the video is
compressed, so the more frequent your keyframes are the better quality the footage is. More keyframes also mean
a larger file size. If you choose 30, a video keyframe draws every 30 frames. If you choose 15, the quality is higher
because a keyframe draws ever 15 frames and the pixels in your footage are more accurate to the original.
Reduce noise.
Noise (scattered pixels in your footage) increases file size. Reduce noise using your video editor, to reduce the video
file size. Using more solid colors in your video reduces its file size.
When you put FLV files on a server, they use the
video/x-flv FLV mime type
. If you have difficulty viewing FLV
files after you upload your files, check that this mime type is set on your server. FLV files are binary, and some
applications that you build might require that the
application/octet-stream
subtype is also set. For more
information on the Flash Player specifications, see
www.adobe.com/go/flashfileformat
.
Troubleshooting video
You can create an application and then encounter problems after you upload it to your server.
Check that your Flash Player version is correct.
For example, if you encoded your files using On2 codec, you need Flash Player 8 or later installed for the browsers
you use to view your Flash content.
Note:
For Flash Player and FLV compatibility, see About using FLV video in Learning ActionScript 2.0 in Adobe
Flash.
Check that your server supports the FLV mime type. For more information on FLV files on a server, see
Configuring your server for FLV files in
Learning ActionScript 2.0 in Adobe Flash
.
Check security guidelines.
If you load FLV files from another server, make sure that you have the proper files or code in place to load from
that external server. For information on policy files, see Server-side policy files for permitting access to data in
Learning ActionScript 2.0 in Adobe Flash
. For information about loading and security, see Understanding security
in
Learning ActionScript 2.0 in Adobe Flash
.
Check your target paths to your video are correct. If you use relative paths (such as /video/water.flv), try using
absolute paths (such as http://www.helpexamples.com/flash/video/water.flv). If your application doesn’t work as a
relative path, but does work as an absolute path, correct the relative path.
SWF application authoring guidelines
About SWF application guidelines
The best way to create Flash applications depends on the application you create and the technology that you are using
to build the application.
Updated 5 March 2009