I am trying some video processing exercises, and wondering if there is a way to display multiple video streams into one window a la pyplot.subplot command for the images.
I've tried using subplot syntax, but using it freezes the program, so any alternative source would be much appreciated.
It is possible to display multiple videos(e.g 2-videos can be displayed for dual core processor) at a time for that you have use OpenMP. It is possible if your using opencv. And it is pretty easy Only you have to enable OpenMp in your property sheet.
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Is there any Jupyter widget for visualizing audio synced with a playhead on a time-series plot?
I would like to visualize data derived from an audio sample (e.g. spectrogram and various computed signals), listening to the audio sample while seeing the playhead move across the plots.
I found this old gist https://gist.github.com/deeplycloudy/2152643 which uses pyaudio on the Python backend to play the sound. Any good solutions out there that are a bit less hacky, e.g. ideally entirely JavaScript-based and with playback running fully in the browser?
You can now :). It took me about 10 minutes to put together a demo using Jupyter proxy widget to load a wavesurfer control into a notebook. It works in Chrome but I haven't tested it anywhere else. It should work anywhere wavesurfer and Jupyter work.
Here is a screenshot
See the pastable text from the notebook here:
https://github.com/AaronWatters/jp_doodle/blob/master/notebooks/misc/wavesurfer%20demo.ipynb
For information on jp_proxy widgets look here:
https://github.com/AaronWatters/jp_proxy_widget
In the time since I posted this question, a few new solutions have emerged:
Scott Condron: Building Tools to Interact With Your Data
Building Tools to Interact With Your Data 2020-10-21-interactive-audio-plots-in-jupyter-notebook.ipynb
These solutions use holoview, have a playhead linked between the audio and the plots, and can run fully on the browser.
I'm working on an application in python using opencv for use in athletic coaching. I'd like it to run at 60fps, but I can't seem to get it to that speed. I've determined that the part that is slowing everything down is the capture process; frames aren't getting from the camera to the cpu fast enough.
Now, I know it is possible for the camera to run at 60fps, because when I open up the same camera in guvcview (at the same resolution), I can get a full 60fps.
I don't want to share my entire project, but here's the part that manages frame capture: https://pastebin.com/nnx32rQK
Any help would be welcome!
I'm using ffmpeg to process video files using Python, but I want to be able to open a local video file and use a few sliders to control the timeline in the video, that way I can get the timestamp from where those sliders were moved.
The goal is to get the beginning and end time of the set positions using the sliders, that way I can cut the video at those times using ffmpeg.
Any help would be appreciated...
Thanks
I ended up using python-vlc which works great in Tkinter.
Here's an example VLC has on their website which was a big help.
http://git.videolan.org/?p=vlc/bindings/python.git;a=blob;f=examples/tkvlc.py;h=55314cab09948fc2b7c84f14a76c6d1a7cbba127;hb=HEAD
Here you can find the documentation:
https://wiki.videolan.org/PythonBinding
I am trying to build a python application involving facial detection in real time using webcam with the help of dlib library. I wish to create a simple python GUI for controlling the webcam stream. I tried to search for Tkinter or PyQt GUIs but could not find one. Please suggest me some code snippet or site where I can find one.
While I was searching on Youtube I came across this video which has exactly what I wanted viz. a simple GUI for controlling webcam using PyQt5. The link is as follows:
https://www.youtube.com/watch?v=MUpC6z32bCA
Hope this will be helpful for all those having the same query.
I'm developing an engine with Python and Pygame, and it already has built-in support for animations with spritesheets. Nevertheless, It would be really interesting to be able to get the frames from a gif so that I could add to the Animation object as an alternative to spritesheets.
Is there a library to access the frames in a gif file, or even video, in Python? Thank you very much.
Check out MoviePy.
MoviePy is a Python module for script-based movie editing. It enables basic operations (cuts, concatenations, title insertions) to be done in a few lines, and can be used for advanced compositing and special effects.
http://zulko.github.io/moviepy/
Also, here is a tutorial on how to use it to make gifs, which could prove useful:
http://zulko.github.io/blog/2014/01/23/making-animated-gifs-from-video-files-with-python/