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Questions tagged [video]

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

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ffmpeg - Live hardware capture dropping frames and/or audio pops

I'm attempting to capture 1920x1080 at 60 FPS using a Magewell HDMI capture. If I preview it with ffplay it looks just fine, however when using ffmpeg to record I get frame drops and minor audio ...
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ffmpeg - blend video with images

So I want to create videos that had a red overlay, effect and I assume that blend is the right options filter for this. Here my command : ffmpeg -i dogs.mp4 -i red.jpg -filter_complex '[1:v]scale=...
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How to generate TSMuxer .meta file with command line?

With the GUI if you open any file it generates the .meta file and you can save it as a file and pass on for the batch scripts, etc. It looks something like this MUXOPT --no-pcr-on-video-pid --new-...
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22 views

FFMPEG - Creating script to convert a video into audio file (or anything related really) + diverses questions

Good day everyone. Im making my babysteps into ffmpeg, and so far this tool has been really helpfull. Anyway. Im currently using this line as a convertion basis : ffmpeg -i name.mov -c:v libx264 ...
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1answer
26 views

Call FFmpeg filter from source code

I'm trying to find out how to call a FFmpeg filter (freezedetect) from within FFmpeg's source code. I see the filter's file is under libavfilter/vf_freezedetect.c, but I don't know how to use that ...
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21 views

FFmpeg loop filter doesn't work

This is a follow-up from my previous question here. Basically, I'm trying to use FFmpeg's loop filter to freeze some frames and insert black frames. It's very weird; I swear it was working a few days ...
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1answer
25 views

Combining two video fields into one (to create an interlaced video)

I have two separate video fields (top.avi and bottom.avi) and I would like to merge them to create an interlaced video. Is it possible to do this with ffmpeg? (or any other tool for Windows or Linux) ...
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1answer
27 views

FFmpeg No such filter error

I'm trying to use FFmpeg to create a new video with some frames repeated and black frames inserted inside. Here is my command: #! /bin/sh fn="Drifting with Cars.mp4" # ffmpeg -y -i "${fn}" -ss 00:00:...
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DJI MAVIC PRO Wavy lines issue

I'm having a new issue with my Mavic recording wavy lines. It seems that it affects only vertical high contrast areas. I have included a very short clip that shows the problem. Any help would be ...
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23 views

How to lower number of parameters passed to ffmpeg

I am processing video with ffmpeg. I am trying to add image overlays at certain times. I have command something like this: ffmpeg -i video.mp4 -i img_a.png -i img_xx.png -i some_third_image.png -i ...
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1answer
14 views

What is this kind of video artifact called (grafitti)

This lyrics video contains multiple examples, ie. 0:41 to 0:43 and 1:00 to 1:02 and 1:31 to 1:38. I mean the grafitti zipping quickly through. I've seen this effect earlier, but I don't know what it'...
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Simple tool for multiple time-based video annotations?

I am nearly a total beginner when it comes to this field, so sorry if this is a basic question. I am looking for an easy to use tool that analysts can use when watching short videos. They will be ...
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8 views

Ffmpeg render only modified times/frames

2 questions. I need to black out 15 seconds of the video and I think I know how to do it... I generally used that command ffmpeg -i input.mp4 -vf "drawbox=c=black:t=max:enable='between(t,X,Y)'" -c:a ...
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2answers
54 views

Is there a “Lightroom for Video” product?

I'm doing photography, audio recording, and video just for fun. I have a full Creative Cloud subscription. I mention this to help clarify my fundamental objectives and very limited perspective and ...
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1answer
32 views

High noise video during night at F/1.8

I am using Nikon D5600 camera body with Nikon f1.2 50mm prime lens. Shooting condition: Dark with few lamps along the street. Settings: Mode: Manual Aperture: f1.8 ISO: 200 Shutter Speed: 1/50s ...
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How can I use ffmpeg to crop a part of a video by frames numbers including video and audio?

I have a simple list in csharp only for example: LReg.start = rise[i]; LReg.end = fall[i]; LR.Add(LReg); start and end are int's in the end I have a List of the frames I want to extract from a video ...
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White crop marks leading to video quality drop on Instagram

So Im converting a 1920x1080 into a square of 1920x1920 and population the black space with white instead. I find that doing this is leading to an extremely large drop in quality when posting the ...
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8 views

How to create interactive musical notation in a video?

I want to prepare a video series to give guitar training. I want to show the instant flow of the notes on sheet somewhere below at the screen while I play at main screen. How can I do that ? Any ...
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2answers
28 views

Ideal frame rate for video with moving objects

I am working on a drone to capture a soccer game. What should be ideal minimum frame rate for the camera? Does it depend on velocity of objects(ball, players) in the game?
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14 views

MPEG DASH Encoder for changing parameters on the fly

Is there any MPEG Dash encoder which has the feature to change the parameters on the fly? I need to change the segment duration on the fly(dynamically) without exiting the process.
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3 views

Adobe Premiere Temporarily Disable Transitions

I am using a transition (Cross Dissolve) between two video clips. I have adjusted some of its settings (duration and position between the clips) but I need to disable it temporarily to adjust some ...
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How to delete the very last frame of a video using ffmpeg / mencoder / transcode or any other?

I am trying to delete the very last frame of a video using ffmpeg / mencoder / transcode / or any other free linux application. Here is what I have so far, and it's only extracting it, it's not ...
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1answer
13 views

How to record the movement of an image with the mouse?

So, I'm not really into video editing, but I wanted to know, is there a way for example, when you hold and drag an image on an image editor, but record that movement that you do, but I can't record an ...
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Processing different sections of video frames with FFMPEG

I'm trying to process frames of video in FFMPEG; while processing, I'll crop and resize various areas of the frames in separate streams so that I can perform specific processing. I've done something ...
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31 views

Cutting video using timecodes

I have 2 videos. One from cam1 and other from cam6. Below is the timecode information of the 2 videos: fprobe -v error -show_format -show_streams cam1.MP4 | grep 'TAG:timecode' Output->>>>TAG:...
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1answer
19 views

How to convert .scc closed caption subtitles into human readable text

I'm trying to find a tool or library (possibly an open-source tool) to parse or convert .scc closed caption subtitle files to a human readable text, say .srt or xml or any text formats. Is there a ...
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72 views

Debian & Blackmagic Davinci Resolve

Anyone got Davinci Resolve to run on Debian? Version 15.x installs great without error on debian but it crashes upon startup. I would like to hear from anyone who runs it with Debian, what video cards ...
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1answer
9 views

Stream from several android phones to pc

I'd like to know if there is a way to record from several android phones at the same time (at least 2) and send the data in real-time to a computer. I don't need to watch the recording in real-time, ...
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1answer
11 views

can I do parent other object to other object masked by mask tracker?

can I put information of mask tracker to another object's position?? or can I do parent other object to other object masked by mask tracker??
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11 views

What is meant by Average Content Distance in Videos?

I'm reading a research paper on generating/synthesizing videos: MoCoGAN: Decomposing Motion and Content for Video Generation To evaluate the generated videos, they have used a metric called 'Average ...
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1answer
23 views

Sharpness of Canon 80d

I am trying to figure out the sharpness while shooting video with the Canon 80d. I find that the video kind of never appears to be in focus. If I take pictures of the same things the image quality and ...
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I have below command for video making but now in main video volume is not added then in command error occur

In below Command works perfectly with volume of mainvideo but if volume is not added in mainvideo then error occurs. so, what to do for volume is not added Stream specifier ':a' in filtergraph ...
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2answers
43 views

Can you give a tip how to create a video with such effect?

I really like these effects and I would like to reproduce it. I would like to point that I don't know how this effect is called. Whether it is made within a camera or in post production? Here is 2 ...
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27 views

Extract timecode per frame

I have 2 video clips and their start time differs in a few seconds, as in the first camera started recording at 13:20:35, and the second camera started the recording at 13:21:00. These cameras have a ...
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24 views

How could I create a time lapsed image

How can I create a time lapsed image like this? (they are the same drone at 6 different time instances) I am not a professional video editor, but rather just an end user. So is there any online ...
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How to get total number of chunks/segments from .mpd/Dash URL using MSE in javascript

Can any one please advise how to get total number of chunks/segments from .mpd URL using Javascript Media Source Extension? Thanks,
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1answer
58 views

(Efficiently) Extract multiple clips from a long video, possibly with ffmpeg

I've got a long video (2 hours at high resolution). We might as well assume it's in mp4 format, because it's in an AVCHD, and I'll have to extract and convert it to mp4 anyhow. I'd like to extract ...
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1answer
35 views

How to make ffmpeg to generate NUMBER_OF_BYTES tag for every stream in file output?

Can ffmpeg count size of stream in bytes? I want to write NUMBER_OF_BYTES tag for every stream in file output on the fly. Like MKVToolNix does. Input #0, matroska,webm, from 'm:\S01E18.mkv': ...
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63 views

How to use subtitles filter to a video VFR ( variable frame rate ) video?

I have created a VFR (variable frame rate) video from a list of images by using the following ffmpeg command. ffmpeg -f concat -i concat.txt -vsync vfr -pix_fmt yuv420p output.mp4 where the concat....
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1answer
59 views

Question about ffmpeg's overlay variable t

I've got an ffmpeg command that overlays a line on a video and moves it from left to right while the video plays: ffmpeg -i clip.mp4 -i line-with-transparent-white.png -filter_complex "[0:v][1:v]...
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63 views

GUI equivalent for ffmpeg eq filter parameters

I was wanting to know if anyone is aware of a GUI tool that mimics or is similar to the eq video filter parameters in ffmpeg. The eq filter is used to set brightness, contrast, saturation, gamma, etc....
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1answer
8 views

Help me with lyrics sync

I am looking for a program that can help me sync lyrics. I mean, I have txt with lyrics and I want program to be able to sync them with just press and release of any button. At end I want program to ...
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17 views

Stop Handbrake showing filenames in Text on 1st second of video

When I am creating videos using the Handbrake software, it puts the filename I am using in white text on the start of the video. Is there a setting to stop this or some way around this? I would ...
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FFmpeg: Align Video & Audio of Desktop Capture

I am using FFmpeg's built-in gdigrab & dshow to record the display & audio of my system. I am encoding to uncompressed H.264/AVC video & uncompressed PCM/WAV audio. I had been having two ...
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What are the names of the video effects used in this video link

Here is the video link: Below are the time stamps 1:00-1:03 1:15 2:17-2:19 I am still quite a novice. I would like to attempt these myself, but do not know the ...
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Every time i try to crop an image on Vegas 16, it just disappears

Basically i add a image to the video track and i can see it, but when i want to go ahead and crop it, the imagine just magically disappears, but it still shows in the video track that the image is ...
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1answer
49 views

How to create the text effects in short videos like this

I would be very glad if someone could put me in the right direction as to how to achieve text effects like this: I've researched and still can't make out how to ...
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1answer
19 views

What is the good video equveilent of 1300D?

I was surfing the net and I found this answer. Bottom line with the canon rebel series cameras is that the video is pulled from a low resolution capture of the chip which is normally used for ...
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15 views

Automatically create 2d map from a video

Is there a software which can generate a 2d map which shows the position of the walls based on a video where I film the interior of a room?
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27 views

How do you make video look natural?

I want the videos that I will shoot to feel natural and I don't know what I have to do. The research I did in the internet says aperture of our eyes are around F/8 in bright conditions and around F/2 ...