Animating drifter trajectories

Trajan supports animating trajectory datasets using a builder pattern. Start with ds.traj.animate(), chain configuration methods, then call .show() to display interactively or .save() to write a file.

import logging
import numpy as np
import xarray as xr
import coloredlogs
import trajan as ta

coloredlogs.install(level=logging.DEBUG, logger=logging.getLogger('trajan'))

Load the Barents Sea drifter dataset, drop short gaps and grid to 6-hourly.

ds = xr.open_dataset(ta.DATA_DIR + 'barents.nc')

ds = ds.traj.drop_where(ds.traj.time_to_next() < np.timedelta64(5, 'm'))
ds = ds.traj.gridtime('6h')
speed = ds.traj.speed()

2026-07-21 14:51:24 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:24 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting time-variable for "obs"..
2026-07-21 14:51:24 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: obs, detected time-variable: time.
2026-07-21 14:51:24 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Ragged trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting time-variable for "obs"..
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: obs, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Ragged trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting time-variable for "obs"..
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: obs, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Ragged trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: time, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Orthogonal trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting time-variable for "obs"..
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: obs, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Ragged trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: time, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Orthogonal trajectory dataset
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detecting trajectory dimension
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected obs-dim: time, detected time-variable: time.
2026-07-21 14:51:25 runnervm3jd5f trajan.accessor[2874] DEBUG Detected Orthogonal trajectory dataset

Basic animation — just call .animate() and .show(). The title shows the current timestamp automatically.

ds.traj.animate().set_title('Barents Sea drifters').show()

2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG Setting up new plot object.
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.plot[2874] DEBUG Creating new figure and axes..
2026-07-21 14:51:25 runnervm3jd5f trajan.animation[2874] DEBUG Dataset is already regularly gridded, skipping gridtime
2026-07-21 14:51:25 runnervm3jd5f trajan.animation[2874] DEBUG Building animation: 192 frames
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:51:25 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..

Once Loop Reflect

Colour particles by drift speed. Pass the DataArray directly to color_by — no need to add it to the dataset.

(ds.traj.animate()
    .color_by(speed, cmap='plasma', vmin=0, vmax=1,
              label='Speed  [m/s]')
    .set_title('Drifter speed')
    .show())

2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.plot[2874] DEBUG Creating new figure and axes..
2026-07-21 14:52:05 runnervm3jd5f trajan.animation[2874] DEBUG Dataset is already regularly gridded, skipping gridtime
2026-07-21 14:52:05 runnervm3jd5f trajan.animation[2874] DEBUG Building animation: 192 frames
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:05 runnervm3jd5f matplotlib.colorbar[2874] DEBUG locator: <matplotlib.ticker.AutoLocator object at 0x7f5586fe68d0>

Once Loop Reflect

Show static trajectory lines in the background so the full path of each drifter is always visible.

(ds.traj.animate()
    .color_by(speed, cmap='plasma', vmin=0, vmax=1,
              label='Speed  [m/s]')
    .show_trajectories(alpha=0.15)
    .set_title('Speed with trajectory history')
    .show())

2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.plot[2874] DEBUG Creating new figure and axes..
2026-07-21 14:52:48 runnervm3jd5f trajan.animation[2874] DEBUG Dataset is already regularly gridded, skipping gridtime
2026-07-21 14:52:48 runnervm3jd5f trajan.animation[2874] DEBUG Building animation: 192 frames
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.plot[2874] DEBUG Plotting lines
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.plot[2874] DEBUG axes already set up
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:52:48 runnervm3jd5f matplotlib.colorbar[2874] DEBUG locator: <matplotlib.ticker.AutoLocator object at 0x7f559415a3c0>

Once Loop Reflect

Save the animation to an MP4 file (faster and smaller than GIF).

(ds.traj.animate()
    .color_by(speed, cmap='plasma', vmin=0, vmax=1,
              label='Speed  [m/s]')
    .show_trajectories(alpha=0.2)
    .set_title('Barents Sea drifters')
    .set_fps(10)
    .save('barents_drifters.mp4'))

2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.plot[2874] DEBUG Creating new figure and axes..
2026-07-21 14:53:34 runnervm3jd5f trajan.animation[2874] DEBUG Dataset is already regularly gridded, skipping gridtime
2026-07-21 14:53:34 runnervm3jd5f trajan.animation[2874] DEBUG Building animation: 192 frames
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.plot[2874] DEBUG Plotting lines
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.plot[2874] DEBUG axes already set up
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f trajan.traj[2874] DEBUG No grid-mapping specified, checking if coordinates are lon/lat..
2026-07-21 14:53:34 runnervm3jd5f matplotlib.colorbar[2874] DEBUG locator: <matplotlib.ticker.AutoLocator object at 0x7f5586fc19a0>
2026-07-21 14:53:34 runnervm3jd5f trajan.animation[2874] DEBUG Saving 192 frames to barents_drifters.mp4
2026-07-21 14:53:34 runnervm3jd5f trajan.animation[2874] INFO Saving animation to barents_drifters.mp4..

Saving barents_drifters.mp4:   0%|          | 0/192 [00:00<?, ?frame/s]2026-07-21 14:53:34 runnervm3jd5f matplotlib.animation[2874] INFO Animation.save using <class 'matplotlib.animation.FFMpegWriter'>
2026-07-21 14:53:34 runnervm3jd5f matplotlib.animation[2874] DEBUG frame size in pixels is 1090 x 1100
2026-07-21 14:53:34 runnervm3jd5f matplotlib.animation[2874] INFO MovieWriter._run: running command: ffmpeg -f rawvideo -vcodec rawvideo -s 1090x1100 -pix_fmt rgba -framerate 10 -i pipe: -vcodec libx264 -b 1800k -profile:v baseline -vf 'crop=trunc(iw/2)*2:trunc(ih/2)*2' -pix_fmt yuv420p -an -y barents_drifters.mp4

Saving barents_drifters.mp4:   1%|          | 1/192 [00:00<00:41,  4.65frame/s]2026-07-21 14:53:34 runnervm3jd5f matplotlib.animation[2874] DEBUG MovieWriter.grab_frame: Grabbing frame.

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2026-07-21 14:54:50 runnervm3jd5f matplotlib.animation[2874] DEBUG MovieWriter stderr:
ffmpeg version 8.1.2 Copyright (c) 2000-2026 the FFmpeg developers
  built with gcc 14.3.0 (conda-forge gcc 14.3.0-19)
  configuration: --prefix=/home/runner/micromamba/envs/trajan --cc=/home/conda/feedstock_root/build_artifacts/ffmpeg_1783096293470/_build_env/bin/x86_64-conda-linux-gnu-cc --cxx=/home/conda/feedstock_root/build_artifacts/ffmpeg_1783096293470/_build_env/bin/x86_64-conda-linux-gnu-c++ --nm=x86_64-conda-linux-gnu-nm --ar=x86_64-conda-linux-gnu-ar --disable-doc --enable-openssl --enable-demuxer=dash --enable-hardcoded-tables --enable-libfreetype --enable-libharfbuzz --enable-libfontconfig --enable-libopenh264 --enable-libdav1d --disable-gnutls --enable-libvpx --enable-libass --enable-libplacebo --enable-pthreads --enable-alsa --enable-libpulse --enable-libvpl --enable-vaapi --enable-libopenvino --enable-gpl --enable-libx264 --enable-libx265 --enable-libmp3lame --enable-libaom --enable-libsvtav1 --enable-libxml2 --enable-pic --enable-shared --disable-static --enable-version3 --enable-zlib --enable-libvorbis --enable-libopus --enable-librsvg --enable-libjxl --enable-libwebp --enable-ffplay --enable-vulkan --enable-libshaderc --pkg-config=/home/conda/feedstock_root/build_artifacts/ffmpeg_1783096293470/_build_env/bin/pkg-config
  libavutil      60. 26.102 / 60. 26.102
  libavcodec     62. 28.102 / 62. 28.102
  libavformat    62. 12.102 / 62. 12.102
  libavdevice    62.  3.102 / 62.  3.102
  libavfilter    11. 14.102 / 11. 14.102
  libswscale      9.  5.102 /  9.  5.102
  libswresample   6.  3.102 /  6.  3.102
Input #0, rawvideo, from 'pipe:':
  Duration: N/A, start: 0.000000, bitrate: 383680 kb/s
  Stream #0:0: Video: rawvideo (RGBA / 0x41424752), rgba, 1090x1100, 383680 kb/s, 10 tbr, 10 tbn
Please use -b:a or -b:v, -b is ambiguous
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
[libx264 @ 0x5624d56b6680] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5624d56b6680] profile Constrained Baseline, level 3.2, 4:2:0, 8-bit
[libx264 @ 0x5624d56b6680] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'barents_drifters.mp4':
  Metadata:
    encoder         : Lavf62.12.102
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, progressive), 1090x1100, q=2-31, 1800 kb/s, 10 fps, 10240 tbn
    Metadata:
      encoder         : Lavc62.28.102 libx264
    Side data:
      CPB properties: bitrate max/min/avg: 0/0/1800000 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:00.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:01.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:01.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:02.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:02.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:03.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:03.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:04.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:04.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:05.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:05.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:06.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:06.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:07.00
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:07.50
frame=    0 fps=0.0 q=0.0 size=       0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:08.00
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frame=  133 fps=1.9 q=0.0 size=       0KiB time=00:00:13.30 bitrate=   0.0kbits/s speed=0.186x elapsed=0:01:11.52
frame=  134 fps=1.9 q=0.0 size=       0KiB time=00:00:13.40 bitrate=   0.0kbits/s speed=0.186x elapsed=0:01:12.02
frame=  135 fps=1.9 q=0.0 size=       0KiB time=00:00:13.50 bitrate=   0.0kbits/s speed=0.186x elapsed=0:01:12.52
frame=  137 fps=1.9 q=0.0 size=       0KiB time=00:00:13.70 bitrate=   0.0kbits/s speed=0.188x elapsed=0:01:13.02
frame=  138 fps=1.9 q=0.0 size=       0KiB time=00:00:13.80 bitrate=   0.0kbits/s speed=0.188x elapsed=0:01:13.52
frame=  139 fps=1.9 q=0.0 size=       0KiB time=00:00:13.90 bitrate=   0.0kbits/s speed=0.188x elapsed=0:01:14.02
frame=  140 fps=1.9 q=0.0 size=       0KiB time=00:00:14.00 bitrate=   0.0kbits/s speed=0.188x elapsed=0:01:14.52
frame=  142 fps=1.9 q=0.0 size=       0KiB time=00:00:14.20 bitrate=   0.0kbits/s speed=0.189x elapsed=0:01:15.02
frame=  143 fps=1.9 q=0.0 size=       0KiB time=00:00:14.30 bitrate=   0.0kbits/s speed=0.189x elapsed=0:01:15.52
frame=  144 fps=1.9 q=0.0 size=       0KiB time=00:00:14.40 bitrate=   0.0kbits/s speed=0.189x elapsed=0:01:16.02
[out#0/mp4 @ 0x5624d56b5c80] video:183KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.854724%
frame=  192 fps=2.5 q=-1.0 Lsize=     185KiB time=00:00:19.20 bitrate=  78.9kbits/s speed=0.252x elapsed=0:01:16.25
[libx264 @ 0x5624d56b6680] frame I:1     Avg QP: 2.97  size: 32130
[libx264 @ 0x5624d56b6680] frame P:191   Avg QP: 1.12  size:   812
[libx264 @ 0x5624d56b6680] mb I  I16..4: 88.1%  0.0% 11.9%
[libx264 @ 0x5624d56b6680] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.7%  0.0%  0.0%  0.0%  0.0%    skip:99.1%
[libx264 @ 0x5624d56b6680] final ratefactor: -17.65
[libx264 @ 0x5624d56b6680] coded y,uvDC,uvAC intra: 9.6% 7.0% 6.9% inter: 0.3% 0.1% 0.1%
[libx264 @ 0x5624d56b6680] i16 v,h,dc,p: 88% 10%  2%  0%
[libx264 @ 0x5624d56b6680] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 29% 23%  3%  3%  3%  3%  3%  3%
[libx264 @ 0x5624d56b6680] i8c dc,h,v,p: 95%  3%  2%  0%
[libx264 @ 0x5624d56b6680] ref P L0: 91.4%  4.8%  3.8%
[libx264 @ 0x5624d56b6680] kb/s:77.97


Saving barents_drifters.mp4: 100%|██████████| 192/192 [01:16<00:00,  2.50frame/s]

Once Loop Reflect