SaveFrame guide
Video resolution, bitrate, codecs, and real source quality
Resolution is only one part of quality. Two 1080p files can look very different because of bitrate, codec efficiency, frame rate, and previous re-encoding.
What resolution tells you
Labels such as 720p and 1080p roughly describe vertical pixel count. More pixels can retain more detail only when the original source contains that detail and receives enough bitrate. Placing a 480p picture inside a 1080p frame does not make it Full HD.
SaveFrame reports the dimensions observed by the extractor and never invents a 4K label for a smaller source.
How bitrate affects the image
Bitrate is the amount of data available per second. Very low bitrate can create blocks, smear fast movement, and flatten dark areas. Higher bitrate can retain detail but increases size; codec efficiency also matters.
A newer codec may deliver comparable quality with fewer bits than an older codec, so file size or bitrate alone is not a complete comparison.
Frame rate and motion
A 60 FPS source contains more frames than 30 FPS and may look smoother for games or sports. If the camera captured only 30 FPS, generating extra frames does not restore real motion. Platforms may also change frame rate during upload processing.
Choosing a practical download
Choose Best available when preserving the strongest observed source matters more than size. Use a 720p or 1080p cap for compatibility and bandwidth control. Inspect actual dimensions and size instead of relying on a marketing label.
When variants share the same resolution, the option with a suitable bitrate and a codec supported by your device is often the practical choice.