- #1
i-like-maths
- 10
- 8
I have a video to present to my class and for five seconds it goes all blurry.
Does anyone know how to sort it out and why it happened?
Does anyone know how to sort it out and why it happened?
In summary, the conversation revolves around a blurry video that needs to be presented to a class. The cause of the blur is unknown, but it could be due to the auto-focus feature of the camera used. To fix it, one could try disabling the auto-focus or using a video editing software to modify the levels. However, this may not completely eliminate the blur as it would require a deconvolution algorithm which can be a challenging task. Alternatively, one can search for deconvolution software used in image/video forensic analyses.
- #2
Borek
Mentor
- 28,950
- 4,245
i-like-maths said:
Because something is wrong.
Sorry, amount of details you gave doesn't guarantee a better answer. There are tens of formats, thousands of codecs, hundredss of programs you could use to make the video and to show it. Every combination has it quirks, and you want us to guess where is the problem just like that?
- #3
berkeman
Mentor
- 67,041
- 19,864
A common cause could be the auto-focus feature on your camera/phone. Is there a way you can disable it so it won't get confused during your "filming"?i-like-maths said:
- #4
i-like-maths
- 10
- 8
A normal bridge camera was used and it kept on going out of focus which isn't very helpful. And the camera isn't mine and I can't re-film it.
It is in mp4 format and I haven't converted it.
Sorry about the brief previous question, I was in a rush (I always am)
It is in mp4 format and I haven't converted it.
Sorry about the brief previous question, I was in a rush (I always am)
- #5
davenn
Science Advisor
Gold Member
2023 Award
- 9,590
- 10,269
i-like-maths said:
... which is also very unhelpful ... what is a normal bridge camera ?to get decent help, you need to start posing your questions much better and give lots more information
else all of us here are just playing the frustrating "20 questions" gameDave
- #6
Psinter
- 278
- 787
If it is blurry, there's not much that can be done about it without a very big effort.
With the path of least effort you may need to modify the levels in a video editing software. It will give a clearer image to the human eye, but the blur will still be there since you are just modifying the color channels. It is called Image Correction by Level Adjustment. In case you want to look for it
.
With the path of least effort you may need to modify the levels in a video editing software. It will give a clearer image to the human eye, but the blur will still be there since you are just modifying the color channels. It is called Image Correction by Level Adjustment. In case you want to look for it
.- #7
Psinter
- 278
- 787
Let me expand and add a little.
There are different kind of blurs. Let's assume that the kind of "out-of-focus" blur that you got can be approximated with a Gaussian blur, the most common kind of blur. To artificially create that gaussian blur, you convolve an image with some kernel. This means that you would need a deconvolution algorithm which needs values (varying by function) to deconvolve. Because you don't have the values, you would need to approximate by trial and error. That can easily prove to be a hard task.
In any case, if you don't feel like programming it yourself, you can look for deconvolution software used in image/video forensic analyses. Those are your keywords.
There are different kind of blurs. Let's assume that the kind of "out-of-focus" blur that you got can be approximated with a Gaussian blur, the most common kind of blur. To artificially create that gaussian blur, you convolve an image with some kernel. This means that you would need a deconvolution algorithm which needs values (varying by function) to deconvolve. Because you don't have the values, you would need to approximate by trial and error. That can easily prove to be a hard task.
In any case, if you don't feel like programming it yourself, you can look for deconvolution software used in image/video forensic analyses. Those are your keywords.
1. Why is my video blurry for 5 seconds?
There could be several reasons for this, including poor internet connection, low quality video resolution, or a technical issue with the video file itself.
2. Will my video always be blurry for 5 seconds?
It depends on the cause of the blurriness. If it is due to a temporary internet connection issue, the blurriness should clear up once the connection stabilizes. If it is a problem with the video file or resolution, it may persist throughout the entire video.
3. How can I fix the blurriness in my video?
If the blurriness is due to a poor internet connection, try moving closer to the router or restarting your internet router. If it is a resolution issue, try adjusting the video quality settings or playing the video on a different device.
4. Can I prevent my video from being blurry for 5 seconds?
In some cases, yes. Make sure you have a strong and stable internet connection, choose a higher video quality setting, and use a device with a larger screen or better resolution to play the video.
5. Is blurriness in a video always a bad thing?
Not necessarily. Sometimes, a video may intentionally have a blurry segment for artistic purposes. However, if the blurriness is interrupting the viewing experience, it can be considered a negative aspect of the video.
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