timelapse | Native macOS app for recording timelapse videos

I have a folder with thousands of jpgs at 1024x768 that I want to convert into a single video for playback.

The error I get is Error initializing output stream 73:0 -- Error while opening encoder for output stream #73:0 - maybe incorrect parameters such as bit_rate, rate, width or height Conversion failed!

Here's my input $ ffmpeg -i Timelapse/*.jpg -c:v libx264 -preset ultrafast -crf 0 output.mkv -y

What is strange is it errors on a specific numbered output stream. It seems to be either 71:0, 72:0, or 73:0. I thought it was something wrong with the file it is attempting to process in the given stream but the resolution is all the same (as I've seen errors when its not divisible by 2). I've deleted the 71st-73rd image in hopes it was somehow messed up but that doesn't help either. I've ensured my libx264 is installed correctly as well.

Any suggestions?

Terminal output example

Say I have a db containing events:

I want to make my Raspberry Pi camera timelapse boxes to take long exposures at night, and shorter exposures at day. I've gathered a list of sunset and sunrises for my location like this (Script here)

It has the time of day where sun rises, noon and sets. (Or the value "sun": never_rises, or never_sets for polar winter and polar summer, where I live.)

My Picamera has max 6s exposure, so 6000000 microseconds, to get usable images at night. In daytime, i get a good exposure around 4000 microsecond exposure.

I want to make a script that calculates exposure time from max: 6000000 to min: 4000 based on the current time, every minute.

Im thinking something like: Below the time, and until 2 hours before sunrise, its dark, = max exposure.

In 2 hours from sunrise, to daylight, get a value from max to min.

min continues trough the day.

Then, from min to max in two hours, from sunset and outwards, when its dark again.

But my math skills are weak. How could I calculate a smooth transition from max to min each minute, during two hours?

If the sun set and rise was the same time every day, I could make a excel sheet to get usable values, but as the sun set and rises at different times every day it gets tricky.

Scripts used to make the timelapses can be found here.

I have an MP4 video file (Amundsen.mp4) that I created in Google Earth Engine - a timelapse, and a list of dates of each image (dates.txt) - not all consecutive days.

I want to use this list of dates to timestamp each frame in the video in python. Could someone please suggest how, or point me towards a tutorial that does this? I have not found resources on how to work with a video in this way.

I have a problem with CoreData...I've managed to get it to work, but it won't show my title property (which is the task name). I'm pretty new at this, I hope someone can help me out.

MainUI <--this is a pic of what the UI looks like and where the problem is.

This is the main ViewController

I wrote a simulation involving two scripts running in different consoles. The scripts are sending messages to each other via websocket. Messages are sent in defined intervals and contain a timestamp (currently I use datetime.utcnow). Now when I speed up the simulation,'naturally the datetime timestamps are unaffected by this which means they are out of sync with the simulation time. Is there a way to "speed up" the system time or do i have to write my own timestamp function where i can determine the speed?

Edit: Since i can't change the system time I wrote a script with a clock that runs at a speed I can determine and which can generate timestamps. However I have can't find a way to run this clock in the backgroud without blocking the console. I thought i could use asyncio but it is not working like i expected. This is the code:

I used MediaMuxer and MediaCodec to generate a mp4 video.

The video is playble after I call mMediaMuxer.stop()

However, when the user quit the app before I get the change to call the stop() method, I am left with a big mp4 file that is not playable.

Is there anyway to repair this mp4 file to make it playable?

Here is one example of a corrupted mp4 file

And I was able to repair the file using this online tool but this tool asked to upload a non-corrupted video as reference.

Here is the non-corrupted mp4 video that I used as reference. When I uploaded this video, the tool repaired my broken mp4 file.

So it is possible to repair the file but how did they do it?

If useful, here is the code I used to generate both corrupted and non corrupted

We have a stream that is stored in the cloud (Amazon S3) as individual H264 frames. The frames are stored as framexxxxxx.264, the numbering doesn't start from 0 but rather from some larger number, say 1000 (so, frame001000.264)

The goal is to create a mp4 clip which is either timelapse or just faster for inspection and other checking (much faster, compressing around 3 hours of video down to < 20 minutes), this also requires we overlay the frame number (the filename) on the frame itself

At first I was creating a timelapse by pulling from S3 only the keyframes (i-frames? still rather new to codecs & stuff) and overlaying the filename on them and saving as png (which probably isn't needed, but that's what I did) using (this command is used inside a python script)

I am running into an odd issue with passing an argument with spaces in a Python3 argument.

For example: