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问题[compression](computer)

Martin Hope
jamieburchell
Asked: 2025-03-05 03:16:09 +0800 CST
  • 7

为什么“另存为JPG”12 (Maximum)设置生成的文件大小比“在 Photoshop 中导出JPG”设置生成的文件大小要小？100%

保存后，我对这两幅图像进行了jpegtran渐进式无损压缩，这意味着两幅图像都应该在最佳无损压缩方面实现标准化：

JPG（导出）于100%=4.33 MB

JPG（保存为）12（最大）=4.15 MB

Photoshop 26.4.1 (Windows 11)

现在我发现我在设置中不知不觉地启用了“使用旧版‘导出为’”选项，这导致了大小差异。取消选中该选项并以高质量导出7与使用“另存为”以高质量导出相比，12在通过 jpegtran 运行后，生成的文件大小相同。

compression
Martin Hope
user2386843
Asked: 2024-11-21 05:26:10 +0800 CST
  • 5

我想知道是否由于取消正在进行的压缩操作，我可能永久删除了我的文件。WinRAR 是在所有文件存档后删除还是逐行删除？还是确认已完成整个存档然后继续删除。

要点：

  • 文件太多，无法手动检查

  • 我在 WinRAR Windows GUI 中选中了存档后删除原始文件的复选框，

  • 在删除模式下检查删除文件

compression
Martin Hope
Nino van Hooff
Asked: 2022-12-30 05:28:22 +0800 CST
  • 5

我想创建一个将由低功耗 cpu 解压缩的 zip 文件

Deflate 压缩会减小文件大小，但会增加解压缩时间。

zip 命令本身似乎对压缩是否值得进行了一些分析。请注意，对于某些文件，store使用 (no-compression)，而对于其他文件，使用deflate(compression)。

当我分析输出时，我发现大约 25% 的文件压缩率小于 10%。假设这个轻微压缩的文件需要大量的 cpu 时间来解压缩，这对我来说是不值得的。

我可以告诉zip它只deflate用于至少可以压缩 20% 的文件吗？

我正在使用zip与 Mac 捆绑在一起的命令。如果需要，愿意安装额外的免费软件。

$ zip -v
Copyright (c) 1990-2008 Info-ZIP - Type 'zip "-L"' for software license.
This is Zip 3.0 (July 5th 2008), by Info-ZIP.
$  zip -FSr GravityExpress.pdx.zip ./GravityExpress.pd

  adding: GravityExpress.pdx/ (stored 0%)
  adding: GravityExpress.pdx/music/ (stored 0%)
  adding: GravityExpress.pdx/music/StrangeStuff.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/Escape_Gravity_Express.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/SmoothAndCool.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/scifiNights.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/HomeStretch.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/UpBeat.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/AUTO.mp3 (deflated 2%)
  adding: GravityExpress.pdx/music/the-countdown.mp3 (deflated 2%)
  adding: GravityExpress.pdx/SystemAssets/ (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/card.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/wrapping-pattern.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImage.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/card-pressed.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/ (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/9.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/8.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/10.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/5.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/4.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/6.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/7.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/3.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/2.pdi (stored 0%)
  adding: GravityExpress.pdx/SystemAssets/launchImages/1.pdi (stored 0%)
  adding: GravityExpress.pdx/video/ (stored 0%)
  adding: GravityExpress.pdx/video/director_impact_imminent_2.json (deflated 15%)
  adding: GravityExpress.pdx/video/congratulations.mp3 (deflated 2%)
  adding: GravityExpress.pdx/video/director_other_way_2.mp3 (deflated 3%)
  adding: GravityExpress.pdx/video/director_intro_2.mp3 (deflated 3%)
  adding: GravityExpress.pdx/video/director_t_minus_ten.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/orientation.pdv (deflated 0%)
  adding: GravityExpress.pdx/video/director_airlock_clear_2.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/director_open_airlock_3.mp3 (deflated 3%)
  adding: GravityExpress.pdx/video/director_airlock_clear_2.json (deflated 37%)
  adding: GravityExpress.pdx/video/director_open_airlock_3.json (deflated 47%)
  adding: GravityExpress.pdx/video/director_impact_imminent_2.mp3 (deflated 3%)
  adding: GravityExpress.pdx/video/director_intro_2.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/director_other_way_2.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/congratulations.pdv (deflated 0%)
  adding: GravityExpress.pdx/video/director_impact_imminent_2.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/director_open_airlock_3.pdv (deflated 1%)
  adding: GravityExpress.pdx/video/director_airlock_clear_2.mp3 (deflated 3%)
  adding: GravityExpress.pdx/video/orientation.mp3 (deflated 2%)
  adding: GravityExpress.pdx/video/director_t_minus_ten.mp3 (deflated 4%)
  adding: GravityExpress.pdx/video/director_intro_2.json (deflated 47%)
  adding: GravityExpress.pdx/video/director_t_minus_ten.json (stored 0%)
  adding: GravityExpress.pdx/video/congratulations.json (deflated 45%)
  adding: GravityExpress.pdx/video/director_other_way_2.json (deflated 15%)
  adding: GravityExpress.pdx/video/orientation.json (deflated 52%)
  adding: GravityExpress.pdx/main.pdz (deflated 0%)
  adding: GravityExpress.pdx/images/ (stored 0%)
  adding: GravityExpress.pdx/images/sprite_playdate.pdi (deflated 1%)
  adding: GravityExpress.pdx/images/credits-qr.pdi (stored 0%)
  adding: GravityExpress.pdx/images/launch_control_crank.pdt (stored 0%)
  adding: GravityExpress.pdx/images/card_info_icon.pdi (deflated 7%)
  adding: GravityExpress.pdx/images/checkpoint_banner.pdi (stored 0%)
  adding: GravityExpress.pdx/images/rocket_ship_burn_start.pdt (stored 0%)
  adding: GravityExpress.pdx/images/start_background.pdi (stored 0%)
  adding: GravityExpress.pdx/images/launch_control_button.pdt (stored 0%)
  adding: GravityExpress.pdx/images/logo.pdi (stored 0%)
  adding: GravityExpress.pdx/images/level_thumbs.pdt (stored 0%)
  adding: GravityExpress.pdx/images/rocket_ship_burn.pdt (stored 0%)
  adding: GravityExpress.pdx/images/asteroid_surface.pdi (stored 0%)
  adding: GravityExpress.pdx/images/rocket_ship.pdi (stored 0%)
  adding: GravityExpress.pdx/images/sprite_classic.pdi (stored 0%)
  adding: GravityExpress.pdx/images/launch_tower.pdi (stored 0%)
  adding: GravityExpress.pdx/images/bricks_playdate.pdi (stored 0%)
  adding: GravityExpress.pdx/images/launch_control_room.pdi (deflated 0%)
  adding: GravityExpress.pdx/images/tooltips/ (stored 0%)
  adding: GravityExpress.pdx/images/tooltips/tooltips.pdt (deflated 5%)
  adding: GravityExpress.pdx/images/launch_control_battery_monitor.pdi (stored 0%)
  adding: GravityExpress.pdx/images/bricks_classic.pdi (stored 0%)
  adding: GravityExpress.pdx/images/level-select/ (stored 0%)
  adding: GravityExpress.pdx/images/level-select/connector.pdi (deflated 6%)
  adding: GravityExpress.pdx/images/level-select/a_button.pdt (stored 0%)
  adding: GravityExpress.pdx/images/level-select/d_pad.pdt (stored 0%)
  adding: GravityExpress.pdx/images/level-select/console.pdi (stored 0%)
  adding: GravityExpress.pdx/images/level-select/challenge_bg.pdi (stored 0%)
  adding: GravityExpress.pdx/images/level-select/large_challenge_icons.pdt (stored 0%)
  adding: GravityExpress.pdx/lua/ (stored 0%)
  adding: GravityExpress.pdx/lua/settings/ (stored 0%)
  adding: GravityExpress.pdx/lua/settings/SettingsViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/settings/SettingsScreen.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/settings/Options.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/gameView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/bricksView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/input/ (stored 0%)
  adding: GravityExpress.pdx/lua/gameViewModel.pdz (deflated 1%)
  adding: GravityExpress.pdx/lua/gameInputs.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/start/ (stored 0%)
  adding: GravityExpress.pdx/lua/start/startView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/start/startScreen.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/start/startViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/game-explosion/ (stored 0%)
  adding: GravityExpress.pdx/lua/game-explosion/GameExplosion.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/game-explosion/GameExplosionScreen.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/CamController.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/drawUtil.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/unittests.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/specialsViewModel.pdz (deflated 0%)
  adding: GravityExpress.pdx/lua/common/ (stored 0%)
  adding: GravityExpress.pdx/lua/common/PlanePhysicsViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/common/tooltip.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/gameScreen.pdz (deflated 0%)
  adding: GravityExpress.pdx/lua/game-over/ (stored 0%)
  adding: GravityExpress.pdx/lua/game-over/GameOverView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/game-over/GameOverScreen.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/game-over/GameOverViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/gameHUD.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/video-player/ (stored 0%)
  adding: GravityExpress.pdx/lua/video-player/VideoPlayerView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/video-player/VideoTimebase.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/video-player/VideoPlayerScreen.pdz (deflated 1%)
  adding: GravityExpress.pdx/lua/video-player/VideoViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/video-player/VideoPlayerViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/credits/ (stored 0%)
  adding: GravityExpress.pdx/lua/credits/CreditsScreen.pdz (deflated 0%)
  adding: GravityExpress.pdx/lua/credits/Credits.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/credits/CreditsViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/credits/CreditsView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/end-game/ (stored 0%)
  adding: GravityExpress.pdx/lua/end-game/EndGameViewModel.pdz (deflated 1%)
  adding: GravityExpress.pdx/lua/end-game/FlyToCreditsView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/end-game/FlyToCreditsScreen.pdz (deflated 2%)
  adding: GravityExpress.pdx/lua/end-game/EndGameView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/end-game/FlyToCreditsViewModel.pdz (deflated 1%)
  adding: GravityExpress.pdx/lua/end-game/EndGameScreen.pdz (deflated 1%)
  adding: GravityExpress.pdx/lua/specialsView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/level-select/ (stored 0%)
  adding: GravityExpress.pdx/lua/level-select/levelSelectView.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/level-select/levelSelectScreen.pdz (deflated 0%)
  adding: GravityExpress.pdx/lua/level-select/lockAnimation.pdz (stored 0%)
  adding: GravityExpress.pdx/lua/level-select/levelSelectViewModel.pdz (stored 0%)
  adding: GravityExpress.pdx/libs/ (stored 0%)
  adding: GravityExpress.pdx/sounds/ (stored 0%)
  adding: GravityExpress.pdx/sounds/pickup.pda (deflated 17%)
  adding: GravityExpress.pdx/sounds/thrust.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/rocket_engine_loop.pda (deflated 81%)
  adding: GravityExpress.pdx/sounds/barrier.pda (deflated 26%)
  adding: GravityExpress.pdx/sounds/unlock_denied.pda (deflated 26%)
  adding: GravityExpress.pdx/sounds/conveyor_belt.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/key.pda (deflated 17%)
  adding: GravityExpress.pdx/sounds/dump.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/hollow-swish-airy-short.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/extra_cargo.pda (deflated 8%)
  adding: GravityExpress.pdx/sounds/classic/ (stored 0%)
  adding: GravityExpress.pdx/sounds/classic/pickup.pda (deflated 18%)
  adding: GravityExpress.pdx/sounds/classic/key.pda (deflated 17%)
  adding: GravityExpress.pdx/sounds/classic/dump.pda (deflated 21%)
  adding: GravityExpress.pdx/sounds/classic/extra.pda (deflated 12%)
  adding: GravityExpress.pdx/sounds/classic/fuel.pda (deflated 10%)
  adding: GravityExpress.pdx/sounds/fuel.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/electronic_hum.pda (deflated 52%)
  adding: GravityExpress.pdx/sounds/hollow-swish-airy-short-reverse.pda (deflated 17%)
  adding: GravityExpress.pdx/sounds/blower.pda (deflated 11%)
  adding: GravityExpress.pdx/sounds/extra_turbo.pda (deflated 8%)
  adding: GravityExpress.pdx/sounds/landing.pda (deflated 22%)
  adding: GravityExpress.pdx/sounds/ui_cancel.pda (deflated 31%)
  adding: GravityExpress.pdx/sounds/launch_control_click.pda (deflated 85%)
  adding: GravityExpress.pdx/sounds/rocket_engine_stop.pda (deflated 12%)
  adding: GravityExpress.pdx/sounds/unlock.pda (deflated 10%)
  adding: GravityExpress.pdx/sounds/ui_confirm.pda (deflated 31%)
  adding: GravityExpress.pdx/sounds/extra_life.pda (deflated 10%)
  adding: GravityExpress.pdx/sounds/rocket_engine_start.pda (deflated 12%)
  adding: GravityExpress.pdx/sounds/explosion.pda (deflated 18%)
  adding: GravityExpress.pdx/pdxinfo (deflated 22%)
  adding: GravityExpress.pdx/levels/ (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL22.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL23.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL09.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL21.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL20.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL08.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL24.pdz (deflated 2%)
  adding: GravityExpress.pdx/levels/LEVEL18.pdz (deflated 0%)
  adding: GravityExpress.pdx/levels/LEVEL19.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL25.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL20.bin (deflated 65%)
  adding: GravityExpress.pdx/levels/LEVEL08.bin (deflated 60%)
  adding: GravityExpress.pdx/levels/LEVEL01.pdv (deflated 9%)
  adding: GravityExpress.pdx/levels/LEVEL15.pdv (deflated 6%)
  adding: GravityExpress.pdx/levels/LEVEL14.pdv (deflated 6%)
  adding: GravityExpress.pdx/levels/LEVEL09.bin (deflated 61%)
  adding: GravityExpress.pdx/levels/LEVEL21.bin (deflated 60%)
  adding: GravityExpress.pdx/levels/LEVEL23.bin (deflated 72%)
  adding: GravityExpress.pdx/levels/LEVEL16.pdv (deflated 17%)
  adding: GravityExpress.pdx/levels/LEVEL02.pdv (deflated 4%)
  adding: GravityExpress.pdx/levels/LEVEL03.pdv (deflated 11%)
  adding: GravityExpress.pdx/levels/LEVEL17.pdv (deflated 0%)
  adding: GravityExpress.pdx/levels/LEVEL22.bin (deflated 63%)
  adding: GravityExpress.pdx/levels/LEVEL13.pdv (deflated 4%)
  adding: GravityExpress.pdx/levels/LEVEL07.pdv (deflated 36%)
  adding: GravityExpress.pdx/levels/LEVEL06.pdv (deflated 38%)
  adding: GravityExpress.pdx/levels/LEVEL12.pdv (deflated 2%)
  adding: GravityExpress.pdx/levels/LEVEL19.bin (deflated 64%)
  adding: GravityExpress.pdx/levels/LEVEL25.bin (deflated 61%)
  adding: GravityExpress.pdx/levels/LEVEL04.pdv (deflated 19%)
  adding: GravityExpress.pdx/levels/LEVEL10.pdv (deflated 4%)
  adding: GravityExpress.pdx/levels/LEVEL11.pdv (deflated 9%)
  adding: GravityExpress.pdx/levels/LEVEL05.pdv (deflated 22%)
  adding: GravityExpress.pdx/levels/LEVEL24.bin (deflated 66%)
  adding: GravityExpress.pdx/levels/LEVEL18.bin (deflated 62%)
  adding: GravityExpress.pdx/levels/CREDITS.bin (deflated 56%)
  adding: GravityExpress.pdx/levels/README.md (deflated 21%)
  adding: GravityExpress.pdx/levels/LEVEL15.bin (deflated 55%)
  adding: GravityExpress.pdx/levels/LEVEL01.bin (deflated 62%)
  adding: GravityExpress.pdx/levels/LEVEL20.pdv (deflated 8%)
  adding: GravityExpress.pdx/levels/LEVEL08.pdv (deflated 4%)
  adding: GravityExpress.pdx/levels/LEVEL09.pdv (deflated 0%)
  adding: GravityExpress.pdx/levels/LEVEL21.pdv (deflated 5%)
  adding: GravityExpress.pdx/levels/LEVEL14.bin (deflated 64%)
  adding: GravityExpress.pdx/levels/LEVEL02.bin (deflated 63%)
  adding: GravityExpress.pdx/levels/LEVEL16.bin (deflated 61%)
  adding: GravityExpress.pdx/levels/LEVEL23.pdv (deflated 18%)
  adding: GravityExpress.pdx/levels/LEVEL22.pdv (deflated 0%)
  adding: GravityExpress.pdx/levels/LEVEL17.bin (deflated 62%)
  adding: GravityExpress.pdx/levels/LEVEL03.bin (deflated 66%)
  adding: GravityExpress.pdx/levels/LEVEL07.bin (deflated 59%)
  adding: GravityExpress.pdx/levels/LEVEL13.bin (deflated 59%)
  adding: GravityExpress.pdx/levels/LEVEL12.bin (deflated 65%)
  adding: GravityExpress.pdx/levels/LEVEL06.bin (deflated 87%)
  adding: GravityExpress.pdx/levels/LEVEL10.bin (deflated 88%)
  adding: GravityExpress.pdx/levels/LEVEL04.bin (deflated 68%)
  adding: GravityExpress.pdx/levels/LEVEL19.pdv (deflated 1%)
  adding: GravityExpress.pdx/levels/LEVEL25.pdv (deflated 4%)
  adding: GravityExpress.pdx/levels/LEVEL24.pdv (deflated 1%)
  adding: GravityExpress.pdx/levels/LEVEL18.pdv (deflated 3%)
  adding: GravityExpress.pdx/levels/LEVEL05.bin (deflated 62%)
  adding: GravityExpress.pdx/levels/LEVEL11.bin (deflated 61%)
  adding: GravityExpress.pdx/levels/LEVEL17.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL03.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL02.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL16.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL14.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/CREDITS.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL15.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL01.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL05.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL11.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL10.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL04.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL12.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL06.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL07.pdz (stored 0%)
  adding: GravityExpress.pdx/levels/LEVEL13.pdz (deflated 2%)
  adding: GravityExpress.pdx/fonts/ (stored 0%)
  adding: GravityExpress.pdx/fonts/digital-7-mono-20.pft (stored 0%)
  adding: GravityExpress.pdx/fonts/Edit Undo/ (stored 0%)
  adding: GravityExpress.pdx/fonts/Edit Undo/edit-undo.dot-brk-50.pft (stored 0%)
  adding: GravityExpress.pdx/fonts/Roobert/ (stored 0%)
  adding: GravityExpress.pdx/fonts/Roobert/Roobert-10-Bold.pft (stored 0%)
  adding: GravityExpress.pdx/fonts/Roobert/Roobert-9-Mono-Condensed.pft (stored 0%)
  adding: GravityExpress.pdx/fonts/abduction2002bold-20.pft (stored 0%)
compression
Martin Hope
Secret Discovery
Asked: 2022-10-27 18:24:11 +0800 CST
  • 6

在我使用命令“zip -eq file.zip /folder”使用密码压缩我的文件夹之前。现在我用正确的密码解压缩文件，但总是显示“密码错误”。我也尝试使用 PassFab 进行检查，但很奇怪。它注意到我的 zip 文件未加密并且没有密码。任何人都面临这个问题或任何想法？在此处输入图像描述

passwords compression
Martin Hope
Alan H.
Asked: 2022-10-06 11:38:21 +0800 CST
  • 5

我有一个大约 150KB 的动画 PNG。它是 24 帧。如果我通过 ImageOptim 或 Squash 等典型的 PNG 优化器运行它，它会变成 3KB 和一帧的非动画 PNG。

我很确定动画 PNG 可以/应该远小于 150KB，但我不知道有任何工具可以优化动画 PNG。你？

出于我的目的，该工具应该可以在 Mac 上或在线上运行。

compression png
Martin Hope
William Torkington
Asked: 2022-06-24 22:04:59 +0800 CST
  • 6

语境

这是我的 StackOverflow 问题的重新发布，该问题被错误地提出，因为它与编程无关。

我在 OverTheWire 上玩 Bandit，第十三关需要在不知道文件扩展名的情况下解压缩各种压缩文件格式。为此，我一直在将 hexdump 与Gary Kessler 网站上的文件签名进行比较。

然而，我注意到的是十六进制签名向后出现。例如，以这个gz, tgz gzip存档文件为例：

0000000 8b1f 0808 5006 5eb4 0302 6164 6174 2e32
0000010 6962 006e 3d01 c202 42fd 685a 3139 5941
0000020 5326 8e59 1c4f 00c8 1e00 ff7f f9fb da7f
...

8b1f 0808与Gary Kessler 的网站所显示的相比，签名是向后的：

1F 8B 08        .‹. GZ, TGZ         GZIP archive file
                        VLT         VLC Player Skin file

问题

为什么签名是反的？1F 8B 08与8b1f 0808。遇到的第一个文件是存档文件的 hexdump data.txt，并且具有正确的签名1f8b 0808（使用 找到head data.txt），它与签名完全一致。但是，当我xxd -r data.txt | hexdump再次跑步时8b1f 0808。

对我的 StackOverflow 问题的评论似乎表明它与大/小字节序有关，并将我指向代表分组的-g1标志。xxd

这确实提供了正确的输出，但我不明白分组是什么或它是如何工作的。

linux compression
Martin Hope
JBantha
Asked: 2022-02-17 18:29:28 +0800 CST
  • 4

我们在一个文件夹中有数千个文件，运行它的软件现在允许从压缩文件夹中读取，但每个压缩文件夹只有 1 个大文件

是否有任何软件可以让我们只选择主文件夹自动单独压缩它们？

我们已经尝试过流行的压缩软件（k zip、g zip、7 zip、win rar），也许有一个我们刚刚错过的选项，所以如果你也可以提供一些说明，那就太好了

谢谢

（不用说免费会更好）

compression zip