https://archive.mpi.nl/tla/elan https://archive.mpi.nl/tla/elan This is almost certainly overkill for what you're looking for since it's really intended for re

https://archive.mpi.nl/tla/elan https://archive.mpi.nl/tla/elan This is almost certainly overkill for what you're looking for since it's really intended for researchers (think linguistic transcriptions etc), but any kind of annotation goes really, even if you're only tagging whenever the color green is visible in a video or the sound of a rooster in an audio recording. Format is XML: https://www.mpi.nl/tools/elan/EAF_Annotation_Format_3.0_and_ELAN.pdf https://www.mpi.nl/tools/elan/EAF_Annotation_Format_3.0_and_... There's a python library for parsing outside of ELAN: https://github.com/dopefishh/pympi https://github.com/dopefishh/pympi