mwilcoxson/selfimprovingvisiontoactionmodelswebsitevideos

Episode videos for the project website

These are videos made for the website's episode viewers from the evaluation episode videos in hwryu/mirror_diamond_eval. The website's episode viewers play them so the browser never has to stream and decode a full-rate video at 16 times its normal pace, and so the video plan and the execution can never drift apart.

The raw_4x and raw_16x folders hold sped-up copies of each execution. The side and stack folders hold the plan and the execution in one video, at 1x and as _4x and _16x copies. In side the plan sits to the left of the execution (1280x360), and in stack it sits above it (640x720). The plan is the right half of the plan_idm video below its 20 px label row, stretched back to 640x360. In the Diamond episodes it is one frame behind the execution, because the recording starts one frame before the first executed step, and in BASALT the two are aligned.

Each file mirrors a source path. For example, active_idm/raw/07.mp4 has copies at active_idm/raw_4x/07.mp4 and active_idm/raw_16x/07.mp4, and its combined videos are active_idm/side/07.mp4, active_idm/side_4x/07.mp4 and so on. The older plan_idm_4x and plan_idm_16x copies are no longer used by the site.

A k-times copy keeps every k-th frame of the source at the source's 20 fps (frame n of the copy is frame k·n of the source), so time t in the copy is time k·t in the episode. Videos are H.264 (libx264, CRF 23; preset slow for the execution copies and medium for the combined videos) with a keyframe every 2 seconds, +faststart, and no audio. They were built from source revision efacff62f69be8367c448b1c13ee21869f56ece2.

The raw_auto, side_auto and stack_auto folders hold each Diamond episode fast-forwarded for the viewer's Auto speed, paced as the website's survival clips are: 1x from 3 s before to 1 s after the first time the agent gets, crafts or places each thing, around each death (2.5 s before, 1.5 s after) up to the last of those, from 6 s before to 4 s after the last, and over the first 1.5 s; 32x otherwise, the speed eased in and out in log space over 60 source frames outside the 1x stretches. They run at 40 fps (1x shows each frame twice) to the end of the episode. auto/07.json is the time map of raw_auto/07.mp4 and its side_auto and stack_auto siblings: map holds [clip frame, episode frame] knots (linear between them, within half a frame of the true map), speed the speed label from each clip time on. Oracle episodes have no plan, so only raw_auto. They are built by worker_auto.py.

The frag folder holds the same videos (every raw, raw_4x, raw_16x, side* and stack* file the site plays, the _auto clips too, including the 1x executions from the source dataset) as fragmented MP4s, so the site can stream them piece by piece. frag/active_idm/raw_4x/07.mp4 is active_idm/raw_4x/07.mp4 remuxed without re-encoding into one fragment per keyframe, with an empty moov and a global sidx index right after it (ffmpeg -movflags +frag_keyframe+empty_moov+default_base_moof+global_sidx), so the whole header is a few kilobytes.