Why do iPhone videos have blurry edges on TV?

if videos captured on an iPhone 14 appear to have blurry edges, the issue could depend on multiple factors. Here's an expanded breakdown of possible influences:

1. Capture Conditions
   1. Device Used: Ensure the video was genuinely captured with the iPhone 14. If another device was used, it might have different capabilities affecting quality.
   2. Environment:
      1. Lighting: Low-light conditions can cause noise or reduced sharpness, particularly around edges, as the camera may struggle to focus properly.
      2. Motion: If the subject or the camera was moving while recording, it might introduce blur due to motion.
   3. Settings on iPhone 14:
      1. Focus: Improper focus during recording can result in blurred edges.
      2. Resolution and Frame Rate: Videos recorded at a lower resolution (e.g., 1080p instead of 4K) or frame rate might appear less sharp.
      3. Lens Choice: If the ultra-wide lens was used, distortion or edge blurriness could occur due to the lens characteristics.
2. Playback Device
   1. TV Model: Some TVs may not process video content optimally, especially if they lack advanced upscaling features.
   2. Resolution: Playing a video captured in 4K on a TV with a lower resolution (e.g., 1080p) can lead to loss of detail and sharpness.
   3. Aspect Ratio: If the video's aspect ratio doesn't match the TV's, resizing or stretching could distort the image.
3. Post-Processing and Transfer
   1. Compression: If the video was shared or transferred using apps or services that compress media (e.g., messaging apps), the quality might degrade.
   2. Editing: Any post-processing, like cropping or applying filters, might introduce artifacts or affect sharpness.

Suggestions:

To pinpoint the cause:

• Test Playback: Try playing the video on the iPhone, a computer, and the TV. If the blurriness is consistent, it's likely due to capture settings or conditions.
• Review Camera Settings: Ensure optimal settings were used on the iPhone 14 (e.g., 4K at 60fps, proper focus, and good lighting).
• Inspect the TV Settings: Check if the TV’s picture settings (sharpness, upscaling, etc.) are optimized for video playback.
• Test with Other Videos: Compare with other videos captured on the same device to rule out hardware issues.