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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
For combining subs with videos, you could use Handbrake https://handbrake.fr/
Aegisub is a popular subtitle editor: https://github.com/Aegisub/Aegisub/releases/tag/v3.2.2 (I believe there are newer forks available but the official release as worked fine for me)
A lot of times, Chinese videos will have subtitles hardcoded in them. I've worked on a Python library that can extract these using OCR which should save some time when it comes to getting the proper timings: https://github.com/oliverfei/videocr-PaddleOCR
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.