Questions tagged [video-quality]

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10 views

Fix Lagging Video in Screencast Recording

I just made two screencast recordings on my computer. One using Screencastify and the other using Loom. Both times the video starts lagging shortly in the recording -- by lagging, I mean that ...
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0answers
18 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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11 views

How can I reduce mpeg file size without losing quality?

I want to download some free videos from a website. There are two option there: DVD Video *.m2v with 2Gb and H.264 Video *.m4v (.mp4) with 400Mb. The second one has low quality. I want to know if ...
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3answers
23 views

Effect of screen shape on video quality

How does the shape of screens (that is, different "width x height" values while keeping the same total displaying area) affect the quality for a given optimal viewing distance?
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3answers
48 views

Prime or Zoom for Video (Micro Four Thirds)

I am looking to get a Blackmagic Pocket 4K. I know that you can do the EF conversion, and use Canon EF lenses, but I want to keep the cost down on my initial purchase. I am looking at either getting ...
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1answer
15 views

poor quality video VHS camcorder: is there a fix?

I recently rescued an old Panasonic M40 VHS camcorder. All the electronics work absolutely fine. I bought a pack of VHS tapes and did a quick video test. The video quality is very bad with wobbly ...
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0answers
45 views

Color loss and grayish after downscaling using ffmpeg

Forgive me for I'm new to here, but I've been searching for solutions all the day, yet still puzzled by this problem. I try to downscale a 3840*2160 video to 1080p, and here's what I first did: ...
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7 views

Community where videoproductors watch videos of each other and rate quality of sound, light ect

Where can I find community where junior specialists like me watch videos of each other and rate quality of sound, picture, light, plot etc???
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0answers
58 views

iMovie 4K resolution to Keynote – apparent loss of resolution

I exported a 4k resolution video from iMovie on my MacBook Pro. I imported it into Keynote in order to crop it. I noticed that upon exporting from Keynote, the resolution of the video was markedly ...
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1answer
31 views

Why I might get this high noise on Sony a7 III with Zeiss 24/70 f4 lens?

So I've tried to make a short New Year video and noticed, that I got noise at almost every level of ISO over 3000. And it is the kind of noise, that is impossible to work with. Am I getting ...
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1answer
23 views

Video with lower bitrate resulting from joining two video files

I had a 595mb .MP4 video (data rate: 510 kbps, Total bitrate 638 kbps). And I joined it with another .MP4 youtube video with a lower quality(only the end part).. The resulting video file has a data ...
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1answer
61 views

Using super resolution to improve video quality

Is there any publicly available code that uses deep learning to employ super-resolution techniques to improve the quality of video clips? Or even any free online software? Thanks.
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15 views

Compressed file video quality [duplicate]

there are many parameters in a (compressed) video file: resolution, bitrate, codec, etc. How can we check the overall quality of a video? I know this would be a nasty question, simply due to the ...
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1answer
92 views

Comparing PSNR/SSIM of two videos with different fps/bit-depth

I have a 720p, 30 fps, 8-bit source video. I'm downscaling it to 480p, and I want to measure quality using PSNR/SSIM under two scenarios: Keeping crf/speed settings same, I want to encode in 8-bit(...
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1answer
361 views

How to improve quality of .3gp video

I have a short (~1:13) clip in .3gp format that is effectively useless for my purposes as is, as it is 176x144, and my final output will be 1280x720. My first try was After Effects' Distort>Detail ...
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1answer
197 views

FFmpeg does not preserve colors after resizing

I would like to resize a 4K mkv video to 1920×1080 with ffmpeg version 3.4.6-0ubuntu0.18.04.1 on Ubuntu 18.04. The original file has the following features: Input #0, matroska,webm encoder : ...
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1answer
60 views

How to avoid quality loss on yotube/fb when encoding images into video via FFMPEG

I created a video from a bunch of images off my camera using FFMPEG. I set it to 10fps. The output video looks fine. As soon as I upload it to Facebook or Youtube the quality is reduced significantly. ...
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0answers
12 views

RAW Format videos database

there is an online database for raw videos? I wanted to download some videos in RAW Format for a university work and I can't find none. The job I have to do is to encode the RAW video with different ...
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1answer
105 views

What is the maximum 2D video quality on Oculus Quest?

If you want to create a 2D video to display on an Oculus Quest VR Headset, what is the highest video resolution the Oculus Quest is capable of displaying? 720p or 1080p or 4K or what? Do the ...
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1answer
37 views

How to correct tbn for files with ffmpeg?

I have the following files (all .mp4). Whenever I want to concatenate them, the timestamps apparently get broken. Is there a way to correct those files with transcoding?
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1answer
55 views

How to prevent blur(?) footage at the recording stage?

My question comes in two parts. First, may I know if my assessment of the quality of the footage in this Youtube movie is correct in the first place. Compare the frames around 2:07 of this movie: ...
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1answer
23 views

Fixing flickring old video

I have a bunch video that looks like it's flickering. The video started as Super8 (70s), was converted to VHS some years ago (90s?), and was recently converted to AVI. It looks something like this ...
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1answer
33 views

What is this colour blocking/ banding i'm seeing and can it be corrected for?

See the attached image to see the artifact I'm refering too. There appears to be blocks of oversaturated blue in the water. I'm fairly new to video editing, so I'm not sure which terms to use to ...
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2answers
39 views

Can ffmpeg downsample pixels perfectly?

I've tried all the swsflags options and figure the answer is no, but it can't hurt to ask just in case. For example: downsample from 1920x1080 to 960x540, then upsample back to 1080 using the ...
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0answers
14 views

video steganography frame data loss

In video steganography after embedding image with data and converting it back to video we sent it to receiver. While decryption the video is turned back to frames, but the embedded data is lost in ...
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0answers
27 views

Is there a camera that records video with a quality and style similar to the Black Magic Pocket 4k?

I was looking for a camera to record videos. My aim is to record videos to make films and music videos. I know there are many factors that are independent of the camera to make videos with a '...
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1answer
38 views

Video Quality Measurement test tool

I need to measure streaming video from various different codecs and be able to tell which one is better. What will be the best metrics to look for? Is there a free tool that can help with this.
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0answers
14 views

Which camera is better for recording 'cinematic' videos and films?

I was looking for a DSLR camera to record videos. My aim is to record videos to make films and music videos. I know there are many factors that are independent of the camera to make videos with a '...
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0answers
223 views

Is QTGMC still the best deinterlacer?

From reading various video forums, QTGMC seems to have a reputation as being one of the best tools for deinterlacing video (at least from an open-source perspective), with Yadif in second place. Is ...
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1answer
25 views

Long distance, low light

I'm taking a video next month which will be in a dark conference room with a well lit stage. I need to set up a camera to video the presenter, but this year we have many more attendees, more tables, ...
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1answer
39 views

How can I render a 720x480 clip to playback from YouTube in 1080p?

I'm working on Sony Vegas Pro 14 and I'm editing AMV. The anime clip's resolution that I'm editing is 720x480 - I saw the same clip edited on YouTube and on the settings it was showing that I can ...
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1answer
90 views

How to distribute multiple clips on the timeline, by Date and the time of the first one?

I have an existing project in Adobe Premiere 2017 and I would like to import multiple clips in it. I already have the primary camera in sync with the Audio, and I would like to bring the secondary ...
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1answer
42 views

Using youtube-dl: Does adaptive bitrate (ABR) affect image quality?

I'm using youtube-dl and ffmpeg to get videos/frames of videos from the web. I was told that youtube (and others) use adaptive bitrate streaming, so depending on the network conditions of the user the ...
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105 views

Exported Lossless Video - Output File Was Lossy

I recorded some video-game footage in 320x200 and then upscaled it to 1920x1440 using ffmpeg (nearest-neighbor, lossless libx264). Screenshots of the upscaled footage have pixel-perfect color ...
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1answer
44 views

Avidemux shows better preview than VLC player

I shot a video in Nikon D3400 and tried to play in VLC and native player of Ubuntu. But Avidemux preview is much greater than any of these two. Any way to get the quality of that preview for my video. ...
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1answer
689 views

SDR to HDR (High Dynamic Range) Converter?

I've heard that it's possible to convert SDR videos to HDR and get reasonable results. Obviously, this isn't as good as having source HDR content, but I'm really curious and would like to try this ...
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1answer
77 views

How to prevent frame smoothing (i.e. get really sharp frame images) when making a video with ffmpeg?

I have been digging around here and on the ffmpeg site trying to find some commands to use to generate a movie from a set of images. The command I tried that gives me a video I can watch on my MacBook ...
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1answer
72 views

Why both videos are of same file size?

I am using ProMovie Recorder to record high quality videos using iPhone X, and I noticed a weird thing today. Here's what I did: I recorded a 4K 60fps video for 6 seconds (HEVC encoding). I recorded ...
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4answers
89 views

Re-encoding Lossy formats with Lossless formats

I was re-encoding videos downloaded from YouTube with Lossless H.264 (using FFmpeg) because I'm experimenting with CRF=0. I found that resulting videos are much bigger (1 gigabyte) than the original ...
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1answer
346 views

Export Frames of 10 BPC Video File with ffmpeg

I have several hundred 1080p 59.94fps 10-bit-per-channel (bpc) AVC-Intra Class 100 MXF encoded video files. I would like to extract the frames of this video file and export them to disk in a 16-bit ...
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1answer
120 views

How can I change/reduce the bitrate of AVI files using Adobe Premiere Pro CC or other tools?

I'm using Eprime and Experiment Builder which requires files in AVI format (AVI-XVid). The files are quite small already (various 2 second clips under 1mb), but are still too large which crash the ...
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1answer
28 views

Recording a two speaker event with large audience

We are doing regular events with two speakers on the floor who have their own presentations in parallel. The event is a live hacking presentation, one speaker is the moderator and victim, the other ...
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1answer
548 views

How to output high quality 360 VR video with Premiere Pro?

When editing a 360 video in Adobe Premiere Pro, I noticed that if I import the video into the program and export it again without any additional changes, the resulting file size of the output file is ...
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1answer
27 views

Trying to improve choppy ipad screen capture

I'm trying to improve the choppy screen capture that I'm getting on my ipad. The screen capture plays smoothly when viewed on the ipad itself, however it is choppy when played on my pc in vlc, and ...
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2answers
28 views

How to shoot my whole life from first POV?

I would like to shoot whole my life (24h, 365d etc) on video, like as through my eyes. However I came to dead end trying to match recording times of modern action cameras, the battery change hustle, ...
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1answer
37 views

Objective video quality assessment

I'm trying to develop a tool that given a video (without a reference video), it can measure the quality. Basically given some thresholds, it assigns them a rating (I just need 4 classes 1-4). Since we ...
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0answers
785 views

Sony AVC vs. MAGIX AVC vs. MainConcept MPEG-2: what's the difference?

In VEGAS Pro 16.0 I'm given (at least) three options if I want to render a 1080p 30fps video for YouTube upload: Sony AVC/MVC, template "Internet 1920x1080-30p" Use this setting to create the ...
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1answer
1k views

FFmpeg No such filter error

I'm trying to use FFmpeg to create a new video with some frames repeated and black frames inserted inside. Here is my command: #! /bin/sh fn="Drifting with Cars.mp4" # ffmpeg -y -i "${fn}" -ss 00:00:...
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2answers
87 views

Downsample in Youtube or in editing software?

Target platform: Youtube Target resolution for audience: Full HD I record 4K in order to get better image quality from smartphone (2x birate of FullHD). Should I resample and export the project in ...
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1answer
75 views

Sharpness of Canon 80d

I am trying to figure out the sharpness while shooting video with the Canon 80d. I find that the video kind of never appears to be in focus. If I take pictures of the same things the image quality and ...

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