AV Sync Fix at Mac App Store analyse

AV Sync Fix helps you correct audio and video that are out of sync in video files (MOV, M4V, MP4). You can adjust synchronization easily by dragging on the timeline, or more precisely by entering values. The app fine-tunes playback information—such as media start time and duration—to bring audio and video back in sync. When saving, no re-encoding is performed. Only playback information is updated, so there is no loss in video or audio quality, and even long videos are processed quickly and smoothly. ■ Storage Requirements When you open a video file, the app creates a temporary working copy of the original. The app requires free storage space of more than twice the file size. Copying may take some time for large files, but it enables efficient adjustments and instant preview of results. The temporary copy is automatically deleted when the main window is closed or when you quit the app. ■ Supported Formats • QuickTime movie (.mov) • MP4 file (.mp4, .m4v) But the app cannot open/play the following files. • Files that QuickTime Player cannot open • Files that require conversion or additional codec components to open in QuickTime Player • DRM-protected files such as movies or TV shows downloaded from the iTunes Store or TV app • Fragmented MP4 ■ NOTE! Please make sure to back up your files before using this app, just in case an unexpected error occurs.