Questions tagged [video-capture]

the process of capturing a video signal with a computer, using a capture device (PCI-E, USB, Thunderbolt)

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kdenlive screen grab on ubuntu stopped working with display changing from :0 to :1

I've been using kdenlive to make videos on ubuntu for a while and the screen grab has been fine but, for some reason (probably something I did to try to get the desktop start button to work on ubuntu ...
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Ensuring quality when capturing miniDV tapes for storage with QuickTime

I have a load of old miniDV tapes shot in Standard Definition, and a small consumer DV camera, connected (via Firewire) to an iMac (Big Sur) via a couple of adapters (Thunderbolt to FireWire). I ...
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14 views

Camcorder Tape Capture

So, I want to capture from my analogue camcorder tapes using the RGB and from my digital camcorder using the mini-dv output so it never leaves the digital domain. I recently bought a device that seems ...
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Can anyone tell explain these UTVideo settings to me?

I am on the lookout for an alternative Lagarith Lossless as some games do not really agree with Lagarith Lossless. I did some digging and learned of UTVideo on the internet but the thing is, UTVideo ...
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Can not capture video from dvi to PC

Purpose - to capture video signal from Xray device (VGA and DVI-D outs) to laptop for real-time processing What do we tried: dvi port was connected to pc via dvi->hdmi and video capture card (https:...
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Nikon Z6II / Z7II external video recorder limitations, e.g. Ninja V

Reading through the Reference Manual of the Z6II and Z7II regarding the output HDMI options, it does not list 4k @ 60p or 1080 @ 120p through HDMI. It would suggest that external monitoring and ...
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550 views

OBS custom filename for recordings

OBS allows you to change the pattern for the recordings filenames but there is no simple way to update the file name with any custom string before every recording. You need to visit the options pane ...
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29 views

Transcoded video become shorter (playback length) and plays at double speed

Currently I am doing a project where I am recording live video (720p25) with a video capture card (stretch card). This live video feed is recorded into a 3rd party proprietary video recording software....
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107 views

Using ffmpeg to change value of pixels (pixels close to white, make pure white and pixels close to black, make pure black)

I have a segment of a video captured from a Nintendo 64 that looks like this for a couple of seconds: and because of my capturing setup there is slight ghosting around the black text (and some other ...
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1answer
47 views

MKV file corrupted

I use the movavi screen recorder 10 program for screen recording. However, today, when I finished recording a video, the program stopped responding and I had to close it forcibly. Conclusion: the ...
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8mm film digital transfer via flatbed scanner

I've recently successfully scanned a large number of Kodachrome slides via an Epson v550 flatbed photo scanner. My next digitization project is a small collection of family 8mm film reels. Doing some ...
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How to grab multiple image from a live stream:

Questions: On the links below you can see a live stream from the Danish Great Belt Bridge: Streaming from Danish Great Belt Bridge Pylon Streaming from Danish Great Belt Bridge from landside How to ...
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29 views

video not showing full screen

I have video from multi videos, when I import it in after effect, one of them not showing full screen. I think when see image will understand my problem in video player: in after effect after ...
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Camtasia - How to edit a 936px screen capture, so it will fit 1080P format?

I'm trying to create an explainer video for a website, and I capture with Camtasia the website while Chrome is open. I chose to capture only Chrome inner window, without the buttons or the windows ...
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82 views

Is the RCA camcorder output analog?

Bear with me because I am very new to this topic. I saw a setup where someone was recording using two cameras and sending the output to a laptop. The camera output was sent via a three pin cable which ...
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22 views

Seeking Boroscope capable of focal lengths from 24 to 48 inches

Most boroscopes (tiny mobile cameras) are designed for short focal lengths, like a few inches (think: drain pipe inspection). The boroscopes that claim long focal lengths cite up 16 inches. That's ...
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Is a video capture device with external coding useful for OBS?

I'm awfully new to this, so bear with me if this is a dumb question, but ... I'm in the market for a video capture device so I can use my DSLR for some live streaming video. In investigating external (...
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What is the best way to convert Hi8 tapes on macbook pro of 2013 using Big Sur?

I have several Hi8 tapes that I want to capture and convert with good quality of image. I am trying to avoid the line that appear at the bottom of the image. I have a Sony Z1U that can serve to pass ...
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88 views

Converting/filtering/deinterlacing VHS captures on Linux

I'm pretty much a novice video editor especially on Linux. I'm looking to take a bunch of old home videos I captured using ffmpeg and clean them up as painlessly/automatically as possible. At this ...
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Compensate or fix VHS artefacts in areas of high contrast

Take a look at the man in a tuxedo. To the right of the black leg, there is a bright vertical line. Is there some kind of filter in something like VirtualDub or Vapoursynth which could improve this ...
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35 views

using canon 5D markiii or Olympus OMD EM5 as computer video camera?

I tried the EOS utility and cam link USBs but nothing works for the two cameras that I own---canon 5D mark iii or Olympus OMD EM5. I understand that they are pretty old models. I was wondering if ...
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23 views

How many I-frames are in a single shot?

I have some fundamental questions on shots and I-frames. When we apply shot detection on a video, how many I-frames will exist in a shot? How many frames exist between two I-frames? And does the shot ...
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352 views

If I screen-capture a snapshot from a HDR movie, will the snapshot image be a HDR image?

I have a HDR movie content playing on a HDR supported PC, using software like the VLC layer. If I take a snapshot to get a png image file, will the image file include the HDR information? That is, if ...
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27 views

How to make scenes look continuous?

So I shoot scenes with my cellphone (whether FHD or UHD). But other scenes I take them from clips I find online in a subscription service. If I try to make the video of contiguous scenes combining ...
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308 views

Camtasia Studio video files are too big

I've been trying to export an HD video from a screen recording created with Camtasia studio, but every rendering is returning videos with 80 mb/s of bitrate, I'm setting it to 65% quality, MP4. If I ...
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180 views

Is video output in YUY2 color space lossless if the input is sRGB?

I am considering purchasing one of these: https://static.cloner-alliance.com/manual/ca-1080fl_user_manual_v1.1.pdf It claims to be able to capture "uncompressed video", but in the list of ...
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60 views

Permanent metadata for videos

Is there any existing container (video format) in which the metadata is immutable? I am new to this topic and my use case is that once a video is recorded, I want to preserve the metadata (for ex ...
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229 views

Why does my VCR output a grayscale video if I use an S-Video cable?

I asked here if an S-Video cable could improve the output quality of my VCR (Sharp VC-M401SM). The answers were promising so I bought this S-Video cable (they send me a 2 m cable instead of 0.5 m). ...
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1answer
152 views

Benefits of component/RGB connector (vs. S-video or composite) for VHS capture?

I know it's 2020 but I still have a few VHS tapes to digitise. I do not expect the picture quality to be necessarily good enough to worry about this question. Still, I would hate to lose any tiny ...
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1answer
71 views

USB Webcam not working with USB Microphone

I have two USB devices: a webcam and a microphone. I can play the webcam's video into VLC and GUVCView. However, I want to use the microphone for another application. The issue is that launching ...
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57 views

Application specific screen recorder for Android

For windows, using OBS studio, I can record the screen of a particular application. If in between, I open another window, the recorder records only the selected window and not the window on top. But ...
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71 views

Best practice for recording video calls

I’m a video producer isolated because of Covid19. I’m going to be spending a tonne of time recording guests over video calls. So far I’ve been asking them to record audio locally, recording the ...
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101 views

How to get a TV channel to stream as IP camera

My apartment building is broadcasting security cameras via a TV channel. I want to watch this broadcast on an IP camera viewer software (and there combine it with IP cameras that I am using). Is that ...
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39 views

Best camera for turnkey studio recordings

I work for a university, and I will be working on setting up a small recording studio for our department. The purpose of the recording studio will be to record high-quality educational content. We ...
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2answers
90 views

Record for an hour using mobile phone

I want to record someone speaking for about an hour without any gaps. To do this i'm using a Samsung Galaxy s8. The default video application splits the video into 4gb files when recording longer ...
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3answers
82 views

Syncing Audio and Video

I have am doing a video recording podcast. I am recording the audio with Audacity with my 4 Shure mics hooked up into my Clarett 4pre USB. I am recording the video with OBS Studio a Cannon Vixia GF ...
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32 views

How to record myself while not noticing myself?

I am using an Android Oreo phone. I would like to make a video of myself, but while I make it, I want the screen to go blank. This is so that looking at myself on the phone while I record will not ...
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675 views

FFmpeg 2017 vs 2019 decoding performance improvement

I was trying to do some basic profiling on ffmpeg, following my previous question here. I have a relatively high-bitrate .ts file (17mbps), and I have two versions of ffmpeg (2017.3 and 2019.4), and ...
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790 views

DeckLink recording using ffmpeg on Ubuntu 18.04 doesn't start

I've been spending the 24 hours troubleshooting this problem, but am getting a bit stuck. Pre-info: I'm running an Ubuntu 18.04 server with a DeckLink Duo 2 card inside. Goal: Capture video from the ...
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43 views

Can I capture different native resolutions with the same CCD-Sensor?

Im working on a paper for my university and need capturings of the same scene in different native resolutions. Im currently using the Logitech BRIO camera with OBS for capturing. My question is: If ...
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193 views

Compile FFmpeg example code

I was trying to compile an FFmpeg example code HERE that illustrates how to use filters using it's C APIs. I compiled the code (throuh a universal make). As the usage suggests, I'm doing this: ./...
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18 views

Software that captures and compresses simultaneously

I'm trying to find open-source software that compresses video captured from a webcam automatically. I'm thinking of automatically compressing like in post-production. For example, compressing the file ...
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277 views

Is a UK PAL video tape compatible with a continental Europe PAL VHS/S-VHS player in terms of video and sound

I've read that the difference between UK PAL and Continental PAL is the carrier frequency used for the audio. But is that referring to: the (now former) analogue TV broadcasts the encoding on the ...
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1answer
1k views

Call FFmpeg filter from source code (C API)

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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262 views

Why is my Linear FOV GoPro Hero 4 Black video distorted at edges?

I installed the latest firmware as of 09-APR-2019 to my GoPro Hero 4 Black. I recorded video in 1080 60fps in LINEAR FOV mode with ProTune enabled. Why am I seeing lens distortion at the edges? For ...
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2answers
455 views

Can't capture video from dshow device. FFmpeg finish immediately resulting empty file

I'm digitizing my old tape recordings from usb dongle. Everything been ok, I digitized several tapes, but I'm abandoned this project for a while and reinstalled windows. Keeping on secondary drive the ...
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849 views

Desktop Capture Has Become Choppy/Jerky with FFmpeg

Recently, videos produced by capturing a window on my system using FFmpeg have become choppy/jerky, as if frames have been dropped or duplicated. FFmpeg will sometimes report that a number of frames ...
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1k views

FFmpeg Can't Capture Window Rendered with Secondary GPU

Edit: I am using the terms "primary" & "secondary" cards below loosely. I'm just assuming the Intel card is considered the first card. I recently discovered how to use my secondary graphics card (...
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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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34 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 ...