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Questions tagged [video]

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

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2 views

Video playback and scrubbing, glitching, skipping and strobing in Premiere

When I import a video into Premiere, and try to play it, it's very glitchy. I would press play, and the video playback would be super laggy, but on top of that, different frames from other parts of ...
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2answers
21 views

How to make a dolly effect?

I was watching vertigo last night which is directed by alfared hitchcock and I saw some scenes in which he used 'dolly effect' I was wondering how do you make that effect?
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10 views

Why does my Canon 5D MkII footage look so terrible/grainy/flat/pixelated?

With apologies for the vagueness of the request, I'd be really grateful if someone could take a look at the following two videos and offer any tips as to why the footage might look quite so terrible/...
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24 views

creat an online video maker website with ffmpeg or other tools

I want to create an online video maker website with after effects templates. something like renderforest.com. I did some research and came up with ffmpeg tool.but when i want to edit animated texts on ...
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18 views

Is it possible to downsample HDR quality videos to SDR?

I have an application that encodes and delivers videos by Internet, and those videos need to be played even on modern TVs. The case is that some TVs are HDR and them could play HDR content. The source ...
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2answers
22 views

Best way to add subtitles to videos

I currently have ~200 short 30 second teaser youtube video that link to articles. I am looking for the best way to add captions to these videos. These will eventually go out on social media. Because ...
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1answer
21 views

Is it possible for the viewers to get rid of the 60FPS fast forward effect?

Since I and Everyone else watched too many 24/30FPS throught our lives, whenever We see 60FPS or faster motion picture we feel like its fast forwarded thus makes it terribly unnatural. I want to ...
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1answer
18 views

How to split video output signal from 1 PC to 40 projectors?

I am thinking of implementing this by daisy-chaining multiple splitters but I am not sure if it will work. Does anyone know of a cost-effective solution to this? Thanks.
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0answers
19 views

How can I find duplicate videos by content

I have a lot of video files but also a lot of duplicate with different encoding differences (eg 720p and 4K versions). I wasn't able to find an open source solutions. I tried a Windows paid program ...
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3answers
43 views

How does shutter speed affect the video?

As shutter speed affects the coming light on sensor.But has it any affect on movement of subjects in video?
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0answers
11 views

Can I shoot directly to a hard drive?

I've been doing some Googling but I'm not sure exactly what to search since so far I've come up empty. I'm looking to record directly from a Canon DSLR to an external hard drive, is this possible? If ...
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1answer
20 views

Do blanking intervals appear on both sides of a frame or just the top and left?

I've been learning about the blanking intervals in video signals and often see diagrams like this: (Ref) But, I often also see the blanking regions describes as being on both sides of the image: (...
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9 views

Best audio, video, and image formats for Nature Recording

Wondering what the best audio, video, and image formats are for nature recording like BBC Planet Earth documentaries. Wondering what is typically used, and which ones are available that are "open ...
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1answer
24 views

How to stack three videos side by side with ffmpeg

I'd like to combine three videos into one vertically stacked video. The three videos have different width and height. I can combine them horizontally successfully with this command: ffmpeg -i s1.mp4 ...
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2answers
25 views

Looking for video software for analysing videos

I have a security camera on my car which is triggered by motion detection. Each time it happens it records about 10 seconds in dual cameras which end up with two files A_[timestamp]for front, B_[...
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1answer
21 views

Concat two MP4 files (side by side) with FFmpeg

I'm trying to concat two videos, side by side, using ffmpeg. One of them is 1280x720, and the other 1920x1080. One will be left, one will be right side. The higher resolution will be resized to the ...
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1answer
50 views

ffmpeg combine three videos side by side

I have three videos s1.mp4,s2.mp4 s3.mp4 and I need to combine three videos side by side I know use hstack but my three videos has different size? I've found following commands.It works,but only ...
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0answers
5 views

Simple Video Content Recognition Software

I am looking for a tool that recognizes live action and graphics content in a video, and output the duration used of each style. I am searching for something more automated than scene detection ...
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0answers
24 views

Image sequence to video file in FFMPEG

I have several images which are randomly names such as: MyImage.jpg AnotherPicture.jpg RandomFileName123abc.jpg Is there a way of parsing these 3 images into FFMPEG to have it create a slideshow of ...
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1answer
29 views

Long video ffmpeg transcode makes audio go out of sync

I have recorded a 50 minute video, edited it in Hitfilm Express to censor/blur people, and exported it in Hitfilm's high resolution format, generating an 80GB file. When I try to transcode this file ...
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0answers
30 views

ffmpeg combine two videos side by side

I have two videos s1.mp4,s2.mp4 and I need to combine two videos side by side I know use hstack but my two videos has different size?
2
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1answer
42 views

FFmpeg concat problem

I just want to add black video at the beginning of the video I have found following commands. ffmpeg -i s1.mp4 -f lavfi -i color=c=black -t 10 -filter_complex "[1:v][0:v]scale2ref=1*iw/1/sar:ih/1[...
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0answers
11 views

Sony Vegas - Fading out mask makes it transparent rather than black [duplicate]

I would really appreciate your help. I needed to blur out somebody's face in a video, so I duplicated the video track and created a mask in the top one and then applied the "Pixelate" Video FX effect. ...
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1answer
22 views

Looping Videos until manually advanced

I have 90 individual video files. I would like each individual file to loop itself, until I manually advance to the next file. We are conducting an auction of 90 items. We have a video of each ...
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1answer
49 views

ffmpeg merge 3 videos to a single widescreen video

I have three .mp4 files and I want to generate a single widescreen video For generating the widescreen I've worked out I can use this command assuming I've prepared the individual mp4 files: ffmpeg -...
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1answer
23 views

How to zoom and pan a video fluidly

I have a video that I would like to zoom in/out and pan to keep my subjects centered. I tried to do this by splitting the video and cropping the individual segments, however that will be too choppy. I ...
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1answer
17 views

Tool to find Duplicate Video files ignoring tags

I am looking for an automated method to identify duplicated video files from my large collection of videos. I have used fslint to do this in the past, but I started fixing the EXIF tags on my videos, ...
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0answers
14 views

Quality improvements on frames captured from videos

I'm trying to capture frames from a video, and use them as photos in a machine learning -based process for some detection. Unfortunately, the frames captured from videos are usually very blurry, shaky,...
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1answer
44 views

How to combine so many ffmpeg filters in 1?

I dont even know if it's possible, but if anybody could help me would be really great! :) So first of all i resize my video with this command: CODE №1 ffmpeg -i input.mp4 -c:v libx264 -crf 20 -crf ...
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0answers
19 views

Sony FS5 II to Atomos Shogun

my question is simple: if I record the HDMI stream from a Sony FS 5 II camera with the Atomos Shogun external recorder without selecting the Raw output, can I really have better footage than simply ...
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2answers
29 views

Would repeatedly importing and exporting H.246 video result in loss of quality?

After exporting a time lapse video as H.246 mp4 using Adobe Premiere I realized I wanted a second copy without sound, but I had already changed the settings. To save time I simply imported the mp4 to ...
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2answers
32 views

Do people fundraise to help someone buy a camera?

I have been borrowing my library's camera the past few months and am getting sick of it. I want to buy my own camera, but the camera I want costs around $1600. I do not have that money but really want ...
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1answer
35 views

What happens when a compressed video is played back?

I've been reading up on video compression. I understand that 'raw' media file sizes are to big for practical usage so they have to be compressed, but I'm wondering what happens when the video is being ...
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2answers
20 views

Transport moving object/person to another video

For a video.How can i keep a moving person from a video,and move that person (moving person) to another video.I mean something like that What software i need and ...
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0answers
7 views

I need to have two instances of one very long sequence open at the same time

I need to have two instances of one very long sequence open at the same time. I must be able to see the beginning and end sections simultaneously (and edit from each). Just sending a sequence to the ...
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0answers
38 views

Library for SMPTE 2022-5/6/7

I start working on SMPTE 2022-5/6/7 and i need a library to TX/RX according to these standards and processing on video, audio and ancillary data. Do you know such libraries which are implemented ...
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1answer
31 views

FFmpeg scale video to desire size

I have an video with this resolution: 1920x1080, I want to scale it to 480x852, like this video: https://scontent-frx5-1.cdninstagram.com/vp/d7b76fe78c9ad72016b98dcda320a6ca/5BA532D8/t50.16885-16/...
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1answer
115 views

How to read 10-bit RGB values from HDR video?

I had a HDR video and the format is ProRes. The colour bit depth of ProRes is 10-bit. I would like to extract the 10-bit RGB values from the HDR video. As per this link, I have first converted the 10-...
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2answers
39 views

Frame capture from videos: I-frame vs P-frames

I'm trying to capture various frames within a x264-encoded video files into png files (in python), and then compare the quality of them: cap = cv2.VideoCapture(filename); //get frame_number for ...
2
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1answer
76 views

Continuous video autofocus speed on Sony a7 iii

So I've got my a7iii and continuous autofocus (AF-C) with Wide focus area is blazingly fast when shooting stills. It recognizes faces and can clearly keep the running man's eyes in focus when looking ...
2
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1answer
38 views

How to fix video shot vertically on a smartphone?

I recently committed the crime of shooting video vertically, and now when played anywhere except on my phone the video renders sideways. What is the best method to rotate it (using PC software), ...
3
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1answer
116 views

Using ffmpeg to add height (as black bars) to video file without quality loss

I have a file of resolution 3840x1632, but my TV stretches the picture vertically to fill up all 2160 pixels of height. Is it possible to use ffmpeg to add blank / black height, while preserving the ...
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1answer
37 views

Hardware or software Gen-Lock for different actioncams

I have a GoPro Hero 4 Black and a Rollei 5S Wifi looking at the same scene from a different angle. How can I hardware - or later in software using ffmpeg - gen-lock them? My ideas: Software ...
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2answers
63 views

What would a video look like without the shutter separating frames?

If the shutter wasn't in the picture, what would you get? Are there any examples of this available? I've searched, but couldn't come up with anything. Is this an impossible thing? Or are the results ...
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1answer
27 views

Video conversion

I'd like to convert quite a few BDMV files to MKV files. I know you can do this with MakeMKV, which isn't freeware. Are there any good freeware programs out there to accomplish this? Also, is the ...
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2answers
138 views

What is KeyInt and min-keyint and no-scenecut

I am absolutely new to video processing, I am building a video streaming site and worked with ffmpeg to generate the formats I need for ShakaPackager. Sadly I don't understand some of the options ...
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0answers
6 views

Video Speed Disabled PowerDirector 10

I am using PowerDirector 10 on a windows 10 computer and I want to be able to speed up/slow down my clips. I clicked on the clip and opened the Power Tools and checked Video Speed but all the options ...
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0answers
18 views

Converting text file to a video with speech

I have several long text files and I'm looking forward to convert them into a video with synced text-to-speech voice. Because texts are long, an animation/slide/pagination will be required on video. ...
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0answers
17 views

Codec for video surveillance assuming non-changing scenes

Are there video codecs, which automatically and effectively compress static scenes? For example, if we have the same room shown at the same light, this codec should produce zero or very low extra ...
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2answers
26 views

How can I make videos like this? (mostly samples pitched into iconic pop or meme melodies)

Are there any explanations or tutorials? People don't seem to discuss how they're done in the comments at all and google doesn't help either. I looked up some sheet music and pitched and adapted the ...