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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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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57 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
14 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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16 views
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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17 views
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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1answer
26 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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8 views
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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1answer
42 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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1answer
14 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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15 views
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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6 views
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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38 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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31 views
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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29 views
Trim (remove frames from) live video from webcam
I have a webcam that captures video stream. After 30 seconds I want to remove 1 sec of the video from the start and keep capturing the video stream and so on. In short, I only want to save the latest ...
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3answers
26 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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21 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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1answer
197 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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1answer
22 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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1answer
214 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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1answer
61 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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0answers
11 views
Variable audio drift from screen captured VR project in Unity
I'm new to video editing, and I need to sync up the audio and video from two different sources for a Virtual Reality game. Basically, I have the VR itself running in Unity on one computer, with the ...
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2answers
44 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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22 views
Poor Capture Quality with Camtasia
I build video tutorials. I need to capture video in raw high-quality format so I can hand it to the editor. But, when I record video in Camtasia 2019 or 2020 (new version), the editor complains that ...
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1answer
112 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
95 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
60 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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34 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 ...
3
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1answer
67 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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1answer
79 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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1answer
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
41 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
77 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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1answer
30 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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0answers
556 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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1answer
643 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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1answer
38 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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1answer
157 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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1answer
16 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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1answer
236 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 ...
0
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1answer
881 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 ...
3
votes
1answer
235 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
360 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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0answers
713 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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1answer
755 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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1answer
31 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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1answer
33 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 ...
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1answer
78 views
Retrieve and decode V-Chip data from an aired digital TV stream
I'm trying to retrieve and decode V-chip data from my TV streams (NTSC/ATSC digital streams). Apparently these data are embedded somewhere in the stream itself, but I have no clue how they are ...
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0answers
19 views
Horizontal noise on RCA capture
I'm trying to record some Wii footage using a Silvercrest capture card. I've managed to get the drivers working and recorded a snippet via an RCA A/V cable.
However, there's a weird kind of noise - ...
0
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1answer
189 views
Is there image degradation when you apply the same chroma subsampling iteratively?
I have digitalized a set of old family VHS tapes. As you know, VHS relied on chroma subsampling. And the capture device creates files with the 4:2:2 tag. Now, when I encode again with ffmpeg to get ...
0
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1answer
76 views
How to capture / digitise a live satellite stream
I have coordinates, descrambling codes, et al for a live satellite broadcast. I'm looking to capture that feed into a digital stream that I can feed into AWS's Video services.
My experience is ...
