Questions tagged [video]

Video is the technology of electronically manipulating still images that represent motion.

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Use FFmpeg to calculate optical Flow

I'm trying to use FFmpeg to calculate the total optical flow value (or a motion value) in a short video. Is there a command to do that? I'm currently using Python and openCV to do that: def ...
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Calculate Optical Flow (or total motion) in a video using FFmpeg

Is there an FFmpeg command to calculate the total optical flow value (any any values associated with motion) in a short video?
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1answer
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ffmpeg take channels 7+8 and make a stereo

I have a 8 audio track mov file which I want to encode to mp4 using ffmpeg BUT take the tracks 7+8 and put them as stereo with 320k and 48KHz to that mp4. My line is this: ffmpeg -i %source% -map 0:0 ...
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Do i really need a Super-Computer to edit Videos?

I wanted to edit a video and encountered some severe lag and preview stuttering. I started looking around on the internet, but I'm just not getting any definitive and practical information on ...
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Fix Lagging Video in Screencast Recording

I just made two screencast recordings on my computer. One using Screencastify and the other using Loom. Both times the video starts lagging shortly in the recording -- by lagging, I mean that ...
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1answer
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Starting a YouTube channel - Advise/Questions/Tips

everyone. I want to start a YouTube channel with some Computer Science and Mathematics tutorials and would want to hear your opinions/advice on how to get on about it. So, here is what I want to do: ...
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Convert mp4 for different resolutions for playing using his

How do I transcode my mp4 video to different resolutions and create m3u8 for all for adaptive streaming
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How to use FFMPEG frame transition slowly upward out of view while the next frame slides in the view from bottom to achieve a scrolling effect?

This question also follows another question: How to minimize no of frames/screenshots of web pages required to render a smooth scrolling video using FFMPEG? Scenario: Currently i'm stitching ...
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VLC can't play back when I try to connect it to the Ngix / HLS port in Windows 10

I'm trying to do HLS streaming with NGINX + OBS on WIndows 10 following this video tutorial on youtube : I don't know what's wrong with the configuration ,but VLC ...
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1answer
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Filming with projector

I want to make an educational video. I am using a camera (Canon 250d), a projector, and some lights. The problem is that when I brighten the room or make light on the speaker, the text on the ...
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When I put my shot into Premier, the top half of the shot is cut off. How can I scroll up so I can see the top of the shot?

My phone is I believe an Android A8. I filmed with the phone upright, in I guess portrait mode.
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1answer
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Davinci Resolve - Store Clips Edited in Cut Window in a Media Folder

I am working on a video project in DaVinci Resolve. It a short video documenting a piece of installation art. One of the media files is a handheld camera that takes close up shots of different parts ...
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1answer
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Add two images before a mp4 and one in the end with ffmpeg

I'm trying to make an operation using FFmpeg with just one command to leave the output as lossless as possible. My intention is to add two images, 5 seconds each, before the mp4 file, add a fade in ...
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Is video stabilization during recording better than stabilizing a shot in post-production?

To save CPU overhead on my Hero 5 Session GoPro I'm debating to disable stabilization and run a stabilization after the recording is completed on the video on a PC. Are there benefits to performing ...
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How do I synchronize 3 different videos playing through 3 projectors?

I am looking for help to find a software or device to play three different videos with three different screens/projectors in sync. Previously, I used 3 media players (devices) and played 3 different ...
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1answer
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Check for video file integrity for - bulk

Have more then 1000 mxf files. Is there a software that can bulk check all of them for any kind of corruption/integrity ? I found several answers on stackexchange but all include Linux commands that I ...
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Conversion of AVI H265 video for processing

I've been struggling with this for days with little success and really hope someone can help. I have video files in .avi H.265 (HEVC) format. There are about 1000 of these videos that I need to edit. ...
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1answer
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how to pipe:/// through a .sh or Python script, or use some sort of setting files with FFMPEG

First post, so be kind please :) So a quick bit of history. I am using tvheadend, and the inbuilt transcoder murders my CPU, and provides average quality output (it's powered by ffmpeg), if I pipe ...
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Combining two live RTMP streams into another RTMP stream, synchronization issues (with FFMPEG)

I'm trying to combine (side by side) two live video streams coming over RTMP, using the following ffmpeg command: ffmpeg -i "rtmp://first" -i "rtmp://first" -filter_complex "[0v][1v]xstack=inputs=2:...
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14 views

Add animated gif to video with ffmpeg

I need a simple ffmpeg script to add an animated gif to video with given x and y.
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2answers
53 views

FFMPEG Video loop from images files

I am trying to make a video from a bundle of image files and then apply a an overlay on top of it.Another requirement is to make the video loop 3x. It is simply not working. The requirement is to ...
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Is there a camera effect that can change the true color of a molten metal in daylight from true silvery into a true orange? [duplicate]

I have a theoretical question and i am thinking about aluminum specifically, since it due to low emissivity and high reflectivity, should appear silvery-gray in daylight conditions. When the metal has ...
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1answer
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Can I use historical films from Weimar/Nazi Germany for research? (Copyright UK law)

And does anyone know any good places I could find this stuff, its for a video collage?
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poor quality video VHS camcorder: is there a fix?

I recently rescued an old Panasonic M40 VHS camcorder. All the electronics work absolutely fine. I bought a pack of VHS tapes and did a quick video test. The video quality is very bad with wobbly ...
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Video plays back at half its frame rate and looks weird in Final Cut Pro

I recorded a multi-cam interview video with 2x Canon camcorders, I set them to record at 50fps. Both of them did, and show that they were shot in 50fps within Final Cut, however, my GoPro recorded at ...
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Simple software for simple scoring video(audio + images)

I've tried Vegas, Resolve, Premiere and they just don't seem cut out for this simple task: audio files(simple sequencing, I don't even need overlap) Sequencing image's: possible overlap, cropping ...
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How can I create a working DVD style menu to run on a laptop or USB?

I would really appreciate some advice here. I have 4 videos on a laptop that I want to link together and make them selectable via a DVD style menu that I could create. This is for an exhibition ...
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1answer
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Help with FFmpeg keyframe command

I just discover FFmpeg, and I was using it to find keyframes. I lost the command line due to the power outage. I'm searching for a command line that produce the following output. Can you help me with ...
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22 views

help trying to sync audio to a video

am trying to add the audio file that was extracted with Pazera Free Audio Extractor from the mkv files of source #1 to a video source #2 but i cant get it to sync. does anybody here know how to fix ...
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FFmpeg: Video with crossfade and move up / down effects keeps the first image height

I'm creating a video using 4 images. The image sizes are following: 1st, 2nd and 3rd images sizes are 1280x1600. And the last image sizes are 1280x1280 ffmpeg -y -r 25 \ -loop 1 -t 5 -i 1.jpg \ -...
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2answers
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How to create a video so it can be displayed on 3 screens

My question is simple. Is it possible to create a video (by standard tools and processes) that needs to be displayed on 3 horizontal screens stacked side by side (like a screen wall)? The idea is to ...
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FPS drops in Bandicam recorded video

I recording my video in 30fps 1080, but in result i get video with lower FPS. Where is the problem?
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automate video editing

Good morning excuse me, I have a case. I have videos to edit videos of tutorials in which during the recording there are moments in which I freeze I need to eliminate those segments and shorten the ...
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22 views

Private embeddable live video streaming server

I'm looking for a third-party live video streaming service that will pull in video streams from various surveillance cameras on demand and broadcast them to multiple users. I'm specifically looking ...
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Streaming 720p @ 30fps over 5G wifi to multicast with FFMpeg has terribly bad quality

I am trying to stream my Intel RealSense D435 RGB camera input to a multicast address on my network. Please note, video streaming, encoding, is very new to me - I do not understand much, when ...
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Combining a video and a masking video

We have recieved 2 video files: the video with the main character dancing in the middle an identical file in terms of the animation but the main character is in red, whilst everything else is black. ...
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Name of old VHS content blocker device

I am not sure if this is the right network to ask this question but it's the closest I could find. An acquaintance of mine told me that, when he was a kid, they had some kind of content blocking ...
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2answers
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How can I recreate this distortion effect from Midsommar?

I want to create a distortion effect around someone's head, kind of like what a swirly bokeh would do. There are two different shots that I could find that use this effect in the film 'Midsommar', ...
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2answers
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Is there a microphone / video setup that requires little to no post-production?

I'm trying to record one take per day of someone reading a story in from of a camera in a vlog-like format, but I don't have a ton of time for post-production. Most advice articles on a vlog setup ...
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1answer
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How to fix scale Key-framing issue

I have been facing an issue with my Premiere Pro for a while now and no matter how hard I tried to find a solution, I never managed to find something that will fix my specific problem so that is why I ...
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Community where videoproductors watch videos of each other and rate quality of sound, light ect

Where can I find community where junior specialists like me watch videos of each other and rate quality of sound, picture, light, plot etc???
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merging videos results in a messed up output

I'm trying to merge 2 videos with the same resolution and codecs but on the merged output only the first part (first video) works correctly and as soon as it ends there's a static image of the ending ...
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1answer
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How can I recreate this overexposed effect from the last scene in 'The Lighthouse'?

Spoilers Warning I just finished Robert Egger's film 'The Lighthouse', and one shot in the final scene really inspired me cinematically. Winslow, face covered in blood, finally goes up to the top ...
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Audio Spectrum looking like a heart beat

I'm a newbie to Adobe After Effects. I'm trying to create a simple music visualisation. It should look like a heart beat line reacting to a music. Something like this but reacting to music — EKG ...
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Is there such webcam that has a zoom/telescopic lens that records in 720p?

I'm working on programming a vision detection system. For that, I need a relatively low cost video recorder that has the sole function of recording video, preferably in the form of a webcam. I've ...
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21 views

How to convert ts to mp4

I have a lot of videos needed to convert from ts to mp4, how can I convert it without losing quality? I mean a lot like 30+ each week. I did a search already but none can do it fast enough, doing it ...
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What is this effect called?

I don't really know where else to ask so I'll just post the picture here, its from a heist with Markiplier and I want to use the same effect in a edit. It zooms out and pretty much multiplies then ...
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1answer
57 views

How can I achieve this lo-fi laggy extreme camera shake effect in After Effects or Premiere?

There was recently a short film released by a music collective 'Jackboys' with a very lo-fi, noir look to it, and when transitioning verses, the video cuts to shots with intentional, extreme camera ...
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1answer
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Why I might get this high noise on Sony a7 III with Zeiss 24/70 f4 lens?

So I've tried to make a short New Year video and noticed, that I got noise at almost every level of ISO over 3000. And it is the kind of noise, that is impossible to work with. Am I getting ...
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1answer
57 views

Fixing audio/video out of sync when editing recorded broadcast

I have recorded broadcast-ed material using a DVB-T tuner. That produces several TS files per recording (most likely to keep filesize within FAT32 limitations). I have concatenated each recording ...

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