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Everything on Frame Relay Notes, organised by topic.

Format Basics

• Burned-In vs Soft Subtitles: Tracks and Sidecars — Burned-in subtitles are part of the video image; soft subtitles remain separately selectable when the playback system supports them.
• Convert Video Without Quality Loss: What Is Possible — Video conversion avoids image-quality loss only when compatible compressed streams can be copied into a new container without re-encoding, a process…
• Pixel Aspect Ratio vs Display Aspect Ratio Explained — Pixel aspect ratio describes the shape used to display one pixel; display aspect ratio describes the width-to-height shape of the whole picture.
• Variable vs Constant Frame Rate: Which to Use — Constant frame rate (CFR) gives every frame the same display interval, while variable frame rate (VFR) allows intervals to change.

Compression Workflows

• How to Reduce Video File Size: A Decision Guide — Reduce video file size by defining the delivery requirements, preserving the original, and testing a representative clip.