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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1answer
11 views

How to schedule and record a broadcast like old times

I want to record a live stream video from twitch, at a scheduled time. I searched for this and I can only find tons of questions and tutorials how to record TO twitch, but I want to record FROM twitch....
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22 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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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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19 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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36 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
20 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
47 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
18 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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10 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
34 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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19 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
32 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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33 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
29 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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14 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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FUJIFILM X-T4 live stream capabilites

I'm trying to find out how useful FUJIFILM X-T4 will be as a streaming device. According to the specs it is able to record decent DCI4K 60 fps 10bits. It is also capable of emitting it properly via ...
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10 views

Recording WebCam + live viewing what I am recording not possible: system requirements?

I want to record a video using my WebCam + live viewing the video I am recording to check if everything looks as I want it to look. When using VLC, e.g. with the "stream" option and turning on "...
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1answer
54 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
27 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
24 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
53 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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413 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
361 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
33 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
119 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
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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
149 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
600 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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1answer
174 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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1answer
249 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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556 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
445 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
30 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
63 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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18 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 - ...
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1answer
158 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 ...
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1answer
56 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 ...
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1answer
39 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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1answer
47 views

making mouse click action obvious in a screen-cast video-capture

One of the challenges, in creating a tutorial video via screen video capture, is that it becomes a challenge to make obvious which mouse action was used to produce a certain action on the screen. The ...
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2answers
967 views

Lossless Capture with FFmpeg

I’ve been attempting to do lossless game capture as I’ve been working on a program to do frame rate analysis. I haven’t had much luck finding a program that does lossless capture as AmaRecTV, Dxtory, ...
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3answers
253 views

Recording 720p source with 1080p

I have started video recording some of my game sessions recently. Some of the consoles I am using output 720p and I was wondering what the effect would be, if I record them with 1080p: How does that ...
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3answers
210 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 ...
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1answer
157 views

resend headers NUT formats

If I do this ffmpeg -f dshow -video_size 720x480 -framerate 29.97 -i video="Roxio Video Capture USB":audio="Line (Roxio Video Capture USB)" -c:v mjpeg -c:a pcm_s16le -map 0:v -map 0:a -f fifo -...
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143 views

Sample K representative frames within a video

I have an image-based processing module that takes photos for some computer vision processing. I have many videos, but I need to sample representative frames as its inputs, preferably those frames ...
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Video recording framerate limitation causes? (e.g. 1080p at only 60fps despite same camera records in 2160p?)

I know, smartphone cameras are maybe not the primary interest of professional videographers, but I am interested into the technical aspects. They can also be relevant for real cameras. There are ...
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2answers
46 views

Is failure free streaming possible in todays world?

Is streaming video from one PC to a physical second PC with recording it there, without getting any frame drops, artefacts, basicly everything what the source video don't have, in todays world doable ...
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1answer
45 views

Highest quality way to extract a still from video

I have a MP4 that I really really want a still from. I want to make a canvas from that still. I have access to: Adobe premiere elements 12, ffmpeg and gimp. I want the still to be the highest ...