1. What is XAVC
Video compression formats developed by Sony
- Introduced in 2012
- Feature: support HD up to 4K and beyond. Can handle 60fps and 10bit/12bit color depth
- Use H264 as compression codec but optimize for professional use
H264: released in 2003, support up to 4K
H265: released in 2013, targeted to next generation of video, including 8K and HDR
2. What is Intra/Long GOP
Different ways frames are compressed
- Intra: each frame is compressed individually without referencing other frames
- Higher quality
- Better for editing
- Larger file size
- Long GOP: a group of successive frame is compressed using both intra and inter frame tech
- 3 kind frames
- I frame: Intra frame, self-contained and not based on other frame
- P frame: Predictive frame, hold only the changes from previous frame
- B frame: Bidirectional frame: hold the difference between current frame and preceding and following frame, most compressed type
- Smaller file size
- Artifacts in high-motion scenes
- More complex encoding process
- 3 kind frames
B frame is X% previous frame and Y% next frame
I B B P B B P B B P …
- 1 I-frame
- 3 P-frames
- 11 B-frames
3. What is S-Cinetone
Color Profile developed by Sony.
- Designed to provide filmic look
Key attributes
- Filmic tonal reproduction
- High dynamic range
- Instant usable footage
- Dynamic enough for post-production
4. What is OTC and Rx
OTC: over the counter
- Can be purchased without a prescription
- Include pain relievers or acetaminophen for cold and flu
Rx: Prescription
- Require a prescription from a licensed health care provider
- Only be obtained from pharmacies
Why Rx
- Eye of Horus
- Latin ‘recipe’ means ‘take’