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Questions tagged [video-capture]

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

8
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1answer
2k views

Using h264 in loseless mode brings small unexpected results

I got curious on ffmpeg screen capture capabilities and started messing around with a simple realtime capture test in h264. ffmpeg -f dshow -i video="screen-capture-recorder" -video_size 1920x1080 -...
5
votes
1answer
4k views

How should I encode my 4K video stream?

I'm capturing uncompressed 4K video from my Sony A7R II via a video capture device, and am using ffmpeg to save the video. My problem is I don't know what codec to use. The two options I tried are: ...
4
votes
0answers
1k views

Extract the frame (in image format) at exactly every minute (or second) from a video (by ffmpeg)

Motivation: I would like to seek the frame, then take high quality and exact time screenshots (images) from a video. The video is length is 00:48:43.71 and 23.98 fps (we can think it is 24 fps, isn't ...
3
votes
1answer
5k views

10 bit 422 vs 8 bit 420

I have been looking around for commentary on this, but have not been successful. So, I hope you folks can point me in the right direction. Hopefully, this is the right forum for this kind of ...
3
votes
1answer
2k views

Using ffmpeg with avfoundation, capture_cursor and capture_mouse_clicks options are ignored

Situation: cash-strapped ivory tower visionary and ffmpeg newbie manacled to a 2nd hand 2010 Macbook Pro concealing a 'Black Screen of Death' NVIDIA GeForce GT 330M graphics chip. With the help of ...
3
votes
1answer
25 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 ...
3
votes
1answer
5k views

FFmpeg : How to replace video background color with transparency? (while capturing)

I want to capture a window and overlay it on another video. This is my command: ffmpeg -i MainVideo.avi -f gdigrab -framerate 25 -video_size 300x200 -i title="MyWindow" -filter_complex "[0]setpts=...
3
votes
1answer
61 views

How to capture 4K screens?

I want to create videos for youtube, but because I am using a 4K screen it is very difficult to find a proper recording solution. My idea was to buy a card, that I can put into my computer that ...
3
votes
1answer
2k views

Record raw video with ffmpeg keeping the full color range

I want to do video captures with a video4linux2 device. The video data contains a lot of darker shades of grey. When I capture a single PNG file, everything is fine. Capturing with ffmpeg/avconf ...
2
votes
1answer
2k views

How to add a time stamp using ffmpeg to a screenshot capture of a video

I am trying to output a screenshot of a video at an specified time and the resulting picture should have a black square with the time that was given initially. So far I was only able to produce a ...
2
votes
2answers
239 views

Flicker in the Capture, LED light source

Incident: I'm trying to capture small particles at about 20-30 cm distance to the camera at ~60-70 fps. Was using SMD32 LED with rechargeable battery as light source. By using that light source, ...
2
votes
1answer
674 views

Is possible to use ffmpeg to capture directly a DSLR streaming via USB?

If i have an high end Canon or Nikon camera is possible to do what eos_movrec do but with a better quality? Could be useful to use this for streaming or recording purposes. And in case of something ...
2
votes
1answer
94 views

Crop Video temporary

I am in need of Video Player, or Software or API or any other idea for that help me to save the storage issue. Let me explain, I have a video file about 300mb which contains 10 clips if i make video ...
2
votes
2answers
698 views

Console Audio and Commentary Capture - Is it possible to capture both?

I've been scouring google to see if it's possible to record gameplay audio for consoles as well as live commentary from a microphone or headset. Most of what I come across, from either forums or ...
2
votes
2answers
72 views

Actively Used and Developed Motion Capture Systems

I am looking for Motion Capture Systems that are actively used in the Movie Production Business. I am currently aware of Organic Motion and it's OpenStage2 which can easily cost about 40.000$. I ...
2
votes
2answers
49 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
votes
2answers
664 views

Video capture software for 10-bit 4K

I have a Blackmagic Intensity Pro 4K video capture card and Panasonic GH4, which can output 10-bit 4K from the HDMI port. I'm running Windows 10 and I have two 1 TB SSDs, but with write speeds of ...
2
votes
2answers
399 views

Is is possible to copy the viewport to clipboard within Adobe After Effects?

Is there a way to copy the recent frame to clipboard to paste it in any other program? I know there is an exporting script from Video Copilot but somehow it doesn't seem to work with my version of ...
2
votes
1answer
1k views

ffmpeg filter_complex problem

I'm trying to achieve complex effect with ffmpeg, but I seem to be failing the syntax of -filter_complex somewhere. The goal is to capture part of the screen (with UScreenCapture direct show device) ...
2
votes
2answers
186 views

Mounted Canon VIXIA HF G20 -

Church installation. We have the camcorder mounted 12' above the floor and I have to use a ladder to get to the camera to take out the SD card and then replace it after I have downloaded the video for ...
2
votes
1answer
207 views

AVI Capture in VirtualDub: MP3 Compression

I would like to capture my old VHS tapes to my HDD. I already was successful installing the xvid codec which gives me an acceptable video compression. But somehow I am not able to set audio ...
2
votes
0answers
194 views

Capturing VHS tapes

I bought a Video-2-PC DIY Video Capture Kit which includes a copy of ArcSoft Showbiz 3.5, which I found to be too restrictive and low quality, and VirtualDub 1.9.11.0, which I eventually got to grips ...
1
vote
2answers
32 views

What should I do to improve the quality of the screen capture?

I'm creating videos to post to YouTube. My videos are about some jobs I do on the computer. I watched some of my videos posted and that the quality of the video capture was not very good and clear. ...
1
vote
2answers
41 views

DSLR vs CamCorders for video tutorials?

I'm planning to record video tutorials for a project of mine without compromising on the quality and I would like to know the best option to shoot them
1
vote
1answer
179 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, ...
1
vote
3answers
58 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 ...
1
vote
1answer
54 views

Need advice about VCR to PC connection

I need advice for something I want to do with VCR to PC image transfering. I have bought a video capture usb (RCA to usb) but there is a problem with the image... It's shaking right and left. Like ...
1
vote
1answer
669 views

ffplay - Live capture video gradually lags behind

I have a Magewell capture device that I'm trying to preview with ffplay. It works great, except over time the video will become choppy and lag behind the actual live feed. Right clicking on the ...
1
vote
2answers
2k views

How to create screen capture video without losing it's quality?

I want to create screen capture tutorials such as https://laracasts.com/series/php7-up-and-running/episodes/1 (with the HD option) for YouTube. On laracasts' videos, words are excellently readable, ...
1
vote
1answer
22 views

Request for Camcorder and Tripod Recommendations for Occasional Amatuer Usage, With Emphasis on Good Sound Quality

The title just about tells all about my question, but for a few more specifics, I want to record some monologue rehearsals (of myself) in an empty hall, and will later probably have some live ...
1
vote
1answer
35 views

Focus in Video vs Focus in Image

This is kind of a weird question, but how does focus in video work? I understand how focus works for single, still images. And, I understand that a video is a sequence of images. However, unlike ...
1
vote
3answers
73 views

Looking for the fastest way shoot video on a camera and review it on a laptop

Our freestyle ski team is looking to invest in a system that allows athletes to immediately review their competition ski runs with their coach after they get to the bottom. While they're playing back ...
1
vote
1answer
421 views

capture card for thunderbolt 3.0

I'm a youtube gamer and I'm interested in making the transition from pc to mac. Unfortunately, I'm not too familiar with macs and any challenges their usb thunderbolts will pose. I want to get the ...
1
vote
1answer
954 views

Cheap option for recording HDMI output

I have been looking for a way for my PC to record HDMI output so I can record my gaming console without buying an expensive capture card. I already have a HDMI splitter I'm just looking for some cheap ...
1
vote
3answers
1k views

What Options Are There for Importing Mini DV and Hi-8 Tapes to Thunderbolt?

So, it looks like FireWire is dead, and, along with it, all those FireWire ports on Mini DV cams and A/D converters from the 2000's. So what options exist today for getting Mini DV and Hi-8 tape ...
1
vote
2answers
6k views

Using ffmpeg to stream to or from Blackmagic Decklink Card

I want to use blackmagic cards with ffmpeg to stream their input but there is a problem. When I use "H264 Pro" Encoder as a "decklink" or "dshow" input, I see this error in command line output of ...
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vote
2answers
743 views

Why has my game video, captured with OBS/Win10 DVR, a black screen in iMovie/WindowsMovieMaker?

I am capturing games on my Windows 10 PC with Open Broadcast Software and x264 codec. My problem is that as soon as I import a video.mp4 file to iMovie or WindowsMovieMaker for editing, it is black, ...
1
vote
2answers
1k views

Does having hardware encoding chip help?

I've been googling for a while now so I finally decided to ask others as well as I'm pretty darn confused. I'm looking to be able to stream at 1080p at 60fps ( from a gaming laptop, it's more than ...
1
vote
2answers
1k views

VHS to digital, flickering, lack of video and good sound

I'm trying to convert some VHS videos into digital. To do so, I got the VGB100 from August and connected it to the VHS player and to my computer. I've used two applications to capture video: Arcsoft ...
1
vote
2answers
4k views

Video mixer from multiple sources into one

I want to take two video inputs say one from camera through hdmi/dvi etc and one through laptop(some presentation running in it). One, I want to mix these two video streams and take it out as a single ...
1
vote
2answers
799 views

Corrupt images, when capturing from multiple cameras using the V4L2 API

I would like to grab images from multiple cameras under linux. I followed this presentation used the code and enhanced it for my purpose. It works very well for 1 camera. Once I begin to grab images ...
1
vote
1answer
69 views

Help needed in choosing video production device for use with Matterhorn Capture Agent

In our institution we need to record every class hours and upload it to our Matterhorn server with schedule recording, so i need a good video capture card which need to support a fixed camera and ...
1
vote
0answers
11 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 - ...
1
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0answers
17 views

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 ...
1
vote
0answers
479 views

What timing settings in VirtualDub should be used for VHS capture via EasyCap?

I want to digitize my VHS (PAL) home video tapes using an old video cassette player and EasyCap. Here is the photo of my EasyCap chips for reference: After several days of reading how to perform ...
1
vote
0answers
99 views

Is the Flycam Galaxy Arm and Vest compatible with a Steadicam Solo?

I am planning on getting myself a Steadicam Solo Stabilizer and Monopod from B&H Photo Video. However, for my purposes I would really need an arm and vest kit that I could mount it onto. While I ...
1
vote
1answer
492 views

ffmpeg: Why did my capture speed drop? (can no longer capture using same command)

I've been using the following command to capture video with ffmpeg for the past two months using my Blackmagic Intensity Pro 4K capture card: ffmpeg -bm_v210 1 -rtbufsize 1500M -threads 4 -f decklink ...
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0answers
14 views

How do I import minidv video to windows?

I've connected my camcorder to the pc via firewall,driver was also installed but when I plug in and out nothing happen. (Except the sound). Do i need any software?
1
vote
1answer
656 views

Capture a wpf window : The flickering issue

I made a simple animation (as crawl text) using C#-WPF. The animation is smooth and excellent. (in wpf window) But when I capture it by FFmpeg as video it has flickering problem. Please see sample1 ...
1
vote
1answer
1k views

ffmpeg buffered recording

need some advice to solve the problem ffmpeg is receiving the nonstop live stream (rtmp source) from camera monitoring entry gates after trigger is fired (gate/door is open) I need to create the ...