v0.6

Added support for ffv1 lossless encoding and set it as the default format. After testing, its compression ratio is higher than PNG.

v0.5

Added SpO2 and HR synchronized recording.
Fixed the subtle delay in BVP signal, which had a fixed delay of about 0.03s~0.035s (approximately 1 frame time) in previous versions.

v0.4

publish

Update README.md