Questions tagged [video]

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

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.EXE VIDEO CONVERT TO MP4

I have a video that extension is .exe. I try to open this file in Windows but I can't. I try to convert this file to mp4 but again return empty file. How can I open .exe video?
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8 views

ffmpeg to cut subtitle file in sync with the cut video

I managed to cut the video and keep subtitle in sync by embedding the subtitles in the video: $ ffmpeg -i sample-mp4-file.mp4 -hide_banner \ -vf subtitles=subtitles.srt -ss 0:30:00 -t 1:33:31 \ ...
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Remove motion blur to reveal text in a video

I have some footage of a vehicle in motion, shot from a static CCTV camera. What are the most effective techniques to recover more detail from the vehicle (number plate, text on vehicle etc)? All the ...
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10 views

How can I/Is it possible to create a virtual screen on macOS and send it via NDI to an external monitor?

How can I (is it possible?) to create a 'virtual' screen on macOS and send it via NDI to an external monitor? You can do this with AirPlay and Sidecar, I was wondering if possible with NDI. Or do you ...
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Removal of select subtitle tracks and audio tracks from mkv file in batch

My problem is that I have 2 subtitle tracks, one is named "English signs and songs" and another is called "English full". I also have English and Japanese audio tracks (dual audio)....
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1answer
20 views

ffmpeg libx264rgb error

When i was using ffmpeg i use libx264rgb to convert videos. But when I converted a video there was a error. I will put you a video so that you can see what happened. Original: https://archive.org/...
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11 views

Video editing script to create text with matching audio

I'm trying to write a script that can take a text document and turn it into a video. The task is pretty simple, when the audio plays, show the matching text on screen. What I need to do: Add ...
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11 views

What are the differences between Direct Stream Copy or Stream Copy in Virtualdub?

Can anyone explain how the "Stream Copy" and "Direct Stream Copy" in Virtualdub works? And which one is good for creating a direct copy of a video stream?
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How do I change the speed when I play a video on Movavi?

I was editing a video using Movavi and I don't know exactly what happened, but now when I play the video (still in the softwere) it is being played faster and with no sound as if I changed its speed. ...
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10 views

Increase video recording efficiency on smartphones

I am working on a smartphone app that records a video and uploads it to the cloud. Now I'm trying to find ways to increase the performance and quality of videos. Given sometimes the bandwidth of the ...
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Adapt video recording and playback according to the device

We have a prototype that records video and shares it to other devices to play. How can we customize the video recording and playback experience, considering mobile vs. desktop and the bandwidth ...
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22 views

Dark lines across video

I shot a studio interview and found out, that it has these strange horizontal lines all across the frame. They are visible throughout the whole clip. Here's a closeup with enhanced contrast: I've ...
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1answer
22 views

Put two or more images on video

According this I try to put two pictures on video ffmpeg -i video.mp4 -i photo01.jpg -i photo02.jpg -filter_complex "[0:v][1:v] overlay=25:25:enable='between(t,10,20)';[0:v][2:v] overlay=25:25:...
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Do i need both microphone and audiorecorder to start my video recording

I want to start recording udemy videos, i want to make proffessionally and esteticly looking good, i started ordering 3 lighting i decorated the place Saramonic SmartRig+ Zoom H1n Portable Recorder ...
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Killed my old laptop. Any recommendations to help extend the life of my M1 Macook Air internal SSD?

I recently killed my old (2012) Macbook Pro's hard drive by doing something I didn't realize was a problem. I attend a LOT of training webinars and Zoom video calls with clients: 5 to 10 webinars and ...
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15 views

ffmpeg - sweeping opacity

I have two videos of 1 minute each one. I would like to start the second video at the 50 seconds of the first one. Then I would like to decrease the opacity of the first video from 100% to 0 in the 50-...
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2answers
31 views

Is there any plugin or effect in After Effects where each of many photo layers turn visible in a random order?

Basically, I want to make a collage of my artworks. All are square images. Let's consider there are 48 photos. So I will make a grid in Illustrator of 8x6. Each photo in a separate layer. Now I'll ...
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is it possible to split open GOP video to smaller segments without frame dropping?

I want to split an open GOP video to smaller MP4 segments , but using Segment Muxer , 3 frames are lost. the GOP size of my video is 15 (M=3 N=15) and I use mpeg2video encoding. is it possible to ...
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11 views

Is there any program/subtittling program to add timestamps in a text file?

Hello everyone i'm currently editing a script for dubbing and I need to watch the video and create timestamps with the translated lines for the voice actors to voice. I'm new at this so I'm wondering ...
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1answer
25 views

How to get external mic working through DSLR camera on Zoom on Mac?

I have tried taking the advice and plugging my mic into my camera, but it is now not working, for the question Noticeable video delay when connecting to laptop and DSLR + external mic. Now I am not ...
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1answer
31 views

Noticeable video delay when connecting to laptop and DSLR + external mic

I have a Canon EOS RP DSLR camera that is connected to the adapter through the battery, and plugged into a Pengo HDMI capture device, which is plugged into a USB hub (contains 16 USB ports), plugged ...
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21 views

Trouble combining audio and video streams

I have two streams, one audio and the other video. I'm trying to combine them using this command: ffmpeg -y -i audio.m3u8 -i video.m3u8 -c copy Video.mp4 I found this syntax here: https://video....
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13 views

How to concatenate videos with different number of streams?

I have two video files (.mov), first one contains only video stream and the second one contains both video and audio streams. Is it possible to concatenate them? I have tried using ffmpeg but it doesn'...
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1answer
34 views

Unable to reduce size in Adobe Premier Pro 2020

Today, I've used Adobe Premier Pro 2020 for reducing a video size. I have a video of size 400 MB that I have imported into Adobe Premier to reduce its size. Here the estimated file size is shown is : ...
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1answer
18 views

Can't find long-duration nature videos in 4K

I'd like to purchase long-duration nature videos (30mn or even 1hr), in order to use them for a personal musical project, and then share on YouTube. So, basically I also need to buy a license for that....
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28 views

How to simulate different levels of lighting so as to capture real world behavior in a video?

I am trying to introduce various levels of lighting in the videos so as to simulate real-world behaviour. I am using the ffmpeg tool for this purpose. So far I have tried changing the brightness to ...
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1answer
60 views

What causes the 1080p version of a video to be blocky but the 4k version look perfectly fine?

I'm a complete beginner in all things photography, video compression and YouTube uploads so please bear with me. I recently uploaded a 4k 30fps video to YouTube, and when I select the 4k option it ...
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11 views

How do I animate a clip's scale in FCPX?

I am trying to decrease the size of a clip by having it shrink over the span of a few seconds and disappear into the center of the frame. I couldn't find an answer elsewhere online but perhaps I didn'...
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49 views

How to averagely extract frames from a video using ffmpeg by specifying “fps”

I have a job of using ffmpeg to extract the frames averagely from a video, with different fps. I use this command for it. ffmpeg -i input.mp4 -r specified_fps -q:v 2 image %4d.png And I have 3 ...
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9 views

Why are videos playable in cellphone NOT playable in laptop?

I recorded 20+ videos with my smartphone and copied them to my laptop. Most of them were fine but about five of them were not playable, allegedly file type unsupported, file extension incorrect, or ...
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Very weird behavior of video dimensions

I have a video (for some testing), when I check dimensions in properties, it says 640x1136 pixels. To cross check dimensions, I played it in VLC media player and took a snapshot from there, which ...
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17 views

Modern video encoders/decoders keep producing compression artifacts: what is the (potential) reason?

Follow-up question for: Grime-like blocking compression artifacts on the decompressed video (H.264). Context: while watching videos from time to time I continue notice the presence of compression ...
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23 views

Jerky motion ("judder:) on CGI 24 fps video horiz. pan

I made a 24 fps CGI video, rendered to individual frames. I can't link to the video, as it shows a devl. prototype. The scene is a trucking pan: the cam moves perp. to the view axis. In After FX, I ...
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8 views

Low latency on SRT stream

I am new to this and wondering, how can I get the lowest latency sending an SRT stream? I can’t seem to get under six seconds. Using, latency=10000
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46 views

Video Stream Loop FFMPEG for YouTube, what is missing here?

I am using FFMPEG for streaming 24/7 mp4 video on youtube. The video is somewhere in 2 minutes, the stream starts but does not go on replay, what should I do? I am using this code: @echo off d: cd &...
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how do get video down to reasonable size?

I have lots of livestreams downloaded most of which are 1 hour 2 hour long so 700mb to 1.1gb basically but im looking to shave off as much while preserving quality and sound they are all piano covers ...
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3 views

How do I add a second soundtrack in final cut pro?

I have an old movie for which I've added music and now I want to add some audio sound clips as well. How would I go about adding the audio clips along with the music which is already present?
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1answer
32 views

Keep residual image of an element in a video

I have a video of a static background with a spider which is the only moving element. The spider is going forward for a few seconds, then the video stops. I want to summarize the video into a single ...
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1answer
37 views

FFmpeg: Getting this error while trying to add a logo to video (Unable to find a suitable output format for ..)

Hey guys I want to add a logo to my video with ffmpeg but I am getting this error while running the below command. What is the reason? Please do help. `Unable to find a suitable output format for '...
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1answer
77 views

Extract subtitles in time range using ffmpeg

I have original video (with subs) and cropped version of it (without subs). I need to add subtitles from original video into cropped in appropriate time range. I think the best way to do is: Extract ...
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1answer
25 views

How does scaling work in ffmpeg?

I am new to ffmpeg. I just want to know how I could keep the original scale of the video. The original size of the video is that its frame width is 1820 while its frame height is 720. The original ...
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1answer
39 views

How can I add video effects like these to my video [closed]

I want to add a beginning like in this video Which software should I use? I am completely clueless. Help
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14 views

Only audio is playing when trying to replace the audio in video

I am trying to replace the audio with a new audio, I have gone through some SO questions and still having trouble solving the problem. As of now, I am getting only the audio with the specified ...
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11 views

Is an IDR frame the only type of RAP (Random Access Point)?

I understand that IDR (Instantaneous decoder refresh) frames are what are known as Random Access Points. But are they the only RAP frames?
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1answer
24 views

Compress multiple videos at once on a Mac

I want to reduce the file size of a bunch of videos at once on my Mac. Would you know any free tool that does that or any way to automate a loop in Automator to pilot Handbrake to loop on a given ...
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1answer
29 views

What cable for 200' run between camera (video/audio) and ATEM switcher

I am running a video/audio signal from a camera in a lobby to a Blackmagicdesign ATEM switcher that are about 150' apart but cable run will be closer to 200'. The video/audio from the camera in the ...
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7 views

Improve video resolution when recording a game

I am thinking to record a game, and this game is horrible with low settings. The problem is: I can put the max settings, but only with 800x600 video resolution. How can I convert a video from 800x600 ...
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37 views

draw rectangle when pixel in video has specific value using ffmpeg

My question might seem a bit confusing but what I want is simply to look at a specific pixel value and when it has the value eg. (25,25,25) in rgb, it would use the drawbox filter to draw a rectangle ...
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52 views

Audio clipping after amerge in FFmpeg

Hoping someone out there can help me with this audio issue I'm having using FFmpeg. I've written a bash script using FFmpeg that processes as source a broadcast quality ProRes (HQ) file with four mono ...
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15 views

Frame rate (FPS) multiplied by duration (sec) isn't equal to total frames

On a YouTube video stats, apparently, the frame rate is 30 fps: Total video length is 1:32 i.e. 92 sec. Total frames = frame rate x time Total frames = 30 x 92 = 2760 So why are frames reported as ...

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