打开上传助手，选择视频，填写接收平台显示的大小上限；有时长要求时，再填写时长上限。选择保留的片段，或主动开启加速。处理后检查实测 MP4 大小、时长和播放效果，再通过“分享”自行提交或保存。App 不连接学校账户，也不会代为提交。

请使用采用 H.264 或受支持 HEVC 编码的标准 MOV/MP4。视频压缩最高支持 60 帧和受支持的单声道／立体声 AAC 音轨。上传助手与转 MP4 会生成 H.264 视频，有声音时生成 AAC 音频，最长边不超过 1920 像素、30 帧。HDR 转 SDR 需要你确认。

首版不承诺支持 ProRes、Log、空间视频、字幕、透明视频和复杂轨道。无法处理时会说明原因，并保留原片。

图片工具支持普通静态 HEIC／HEIF、JPG 和 PNG，导出 JPG 或 PNG，并按长边等比缩小。JPG 可自定义 10–20,000 KB 目标；为了达到限制，可能同时降低画质与尺寸。PNG 保留透明区域，转 JPG 时透明区域使用白底。

动态图和空间照片不支持，实况照片只处理静态部分。超过 2400 万输出像素需选择较小尺寸；默认 2048 像素设置可处理普通 4800 万像素照片。目标无法达到时会给出提示，不会把超限文件标成成功。

原码流整理不重新编码画面，但只适用于受支持的完整素材，而且可能只能少量缩小或无法变小。高质量、均衡、目标大小、缩图和变速都可能改变画质。导出前可先预览；请以实际结果判断是否适合你。

导出会生成新副本，不会自动删除原片。先完整查看结果，保存到相册或文件并确认可用，再决定是否移除原片。原片和新副本可能同时占用空间；照片“最近删除”、iCloud 优化存储和 App 工作副本，也会影响手机剩余容量。

视频结果在“记录”中查看。图片工具会保留最新结果及先前图片输出；旧图片输出可在图片历史中手动移除，这不会删除相册原图。移除 App 内副本或在系统中删除 App 前，请把重要结果保存到相册或文件。

单文件照片视频处理、预览、保存、分享、变速和最多 3 段拼接，不限导出次数免费使用。Pro 一次购买，解锁批量分别压缩视频及超过 3 段的视频拼接；无订阅。购买前显示所在地区的实际价格。

已购用户可使用购买时的 Apple 账户，在“设置”或 Pro 页面点击“恢复购买”。此过程可能需要联网；待批准的购买需等 Apple 确认后解锁。退款请通过 Apple 购买支持申请；退款或权益撤销不会删除已经导出的文件。

处理时保持 App 打开，并留出足够工作空间。使用 iCloud 素材时，需要下载所选原件；可在导入进度旁取消。取消后迟到的下载结果不会继续导入。也可尝试提高大小上限，或选择更小的图片尺寸。iOS 会限制后台运行时间；处理失败不会覆盖原文件。

Open the upload helper, choose a video and enter the limit shown by the receiving service. Add a duration limit if needed. Choose a trim range or explicitly enable faster playback. Check the measured MP4 size, duration and playback, then share or save it yourself. VideoSlim does not connect to your school account or submit files for you.

Use standard MOV/MP4 with H.264 or supported HEVC encoding. Video compression supports up to 60 fps and supported mono/stereo AAC audio. The upload helper and MP4 tool create H.264 video, with AAC audio when audio is present, up to 1920 pixels on the longest edge and 30 fps. HDR-to-SDR conversion requires your confirmation.

ProRes, Log, spatial video, subtitles, transparent video and complex tracks are outside the first release’s promised scope. Unsupported media produces an explanation and your original is kept.

Photo tools handle ordinary static HEIC/HEIF, JPG and PNG. Export JPG or PNG and reduce the longest edge while keeping proportions. JPG targets can range from 10 to 20,000 KB; meeting a limit may reduce both quality and dimensions. PNG preserves transparency; JPG puts transparent areas on white.

Animated images and spatial photos are unsupported. Live Photos are processed as still images. Output over 24 megapixels needs a smaller export size; the default 2048-pixel setting can process ordinary 48-megapixel photos. An unreachable limit produces an explanation, not a successful result above the limit.

Original-stream repackaging does not re-encode the picture. It only works with supported complete media and may save little or no space. High-quality, balanced and target-size encoding, resizing and speed changes can affect quality. Preview and review the actual result to decide whether it suits your needs.

Export creates a new copy without automatically deleting the original. Review the whole result, save it to Photos or Files, and check that it is usable before deciding whether to remove an original. Both copies can temporarily use space. Photos’ Recently Deleted, iCloud optimization and app working files also affect available storage.

Video results appear in History. Photo tools retain the latest result and previous photo outputs. Older photo outputs can be removed manually from photo history without deleting the original in Photos. Save important results to Photos or Files before removing app copies or choosing Delete App in iOS.

Single-file photo and video tools, previews, saving, sharing, speed changes and joining up to three clips are free with no export-count limit. Pro is a one-time purchase for batch compression into separate video files and joining more than three clips. There is no subscription. Your actual local price appears before purchase.

Use the Apple Account that made the purchase and choose Restore Purchases in Settings or on the Pro page. Internet access may be needed. Pending purchases unlock after Apple confirms them. Request refunds through Apple’s purchase support. A refund or revocation does not delete files you have already exported.

Keep the app open during processing and allow enough working space. Selected iCloud originals need to download; use Cancel beside the import progress if needed. A late download result will not continue importing after cancellation. You can also try a higher size limit or a smaller image size. iOS limits background execution time. Failed processing does not overwrite your source.