Questions tagged [video-quality]
The video-quality tag has no usage guidance.
339
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How to stabilize DSLR video shot with a tripod in a car
I have recorded videos driving my car. I have setup a Nikon 3200 camera with the 18-55mm kit lens on a tripod in the rear hatch of my car. The tripod sits flat and level in the rear hatch. The tripod ...
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Why does this script reduce the bitrate of both the video and the audio stream?
I wrote the following script that is meant to remove the unnecessary audio streams, aka dubbing, as well as subtitles from
the movies in my collection:
#!/usr/bin/bash
echo "What is the path to ...
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Idea validation - CRF's as a service
I was looking for validation for my startup idea. Please flag if this is off-topic.
Idea: CRF's as a service - When encoding h.264 and libvpx videos, I tend to guess good Constant Rate Factors(CRF's) ...
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Why does setting a maximum bitrate in Constrained Quality mode sometimes increase file size?
Short version: Why did my total file size increase when I switched from constant quality to constrained quality at the same crf? Shouldn't this just set a maximum bitrate and thus only either do ...
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How to setup Sony A58 for clear movie recording?
I have a Sony A58 camera and 18-55mm lens. I did some recordings with AF (Auto-Focus). The frames are a bit blurry. They are actually clear, but it seems to me like the camera is taking two shots and ...
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How does scaling work in ffmpeg?
I am new to FFmpeg. I just want to know how I could keep the original scale of the video. The original size of the video is that its frame width is 1820 while its frame height is 720. The original ...
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Does HEVC Support 16-Bit RGB Color Format?
I have some 3D Rendered Frames in 16-bit rgba Color Format.... I don't Wanna Lose Any Data... Because I have to Use those in editing.... But With Thousands of Frames in 4K File Size Matters.... So Why ...
user30535
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Artifact in animation / horizontal lines & double images
I'm using Handbrake, with the H.264 Codec (RF:16). It works pretty well with live action, but it produces odd results whenever I try to back up/encode animations. I've attached a screenshot:
Anything ...
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What pixel count is required for a near perfect digital copy of an old movie?
I stupidly posted this on Photography SE yesterday evening. I'm posting now in a more appropriate place.
I've been trying to get my hands on some of the very best digital versions of some classic ...
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Why do they deliberately (?) crush the quality for any video sent in by "normal people"?
Whenever they (TV stations, YouTube channels, etc.) show footage shot by "normal people", even current such, it always looks like they used a cheap consumer video camera from 1981 with a worn-out VHS ...
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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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What format should I use to archive video issued from mini DV tapes?
I want to convert and archive movies captured with mini DV tapes. Videos are family movies.
Native format in dvvideo is huge (about 220 MB/min).
So I am willing to accept video compression but I ...
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50% higher bit rate vs 20% higher resolution
I have two videos: first one has 50% higher bit rate, second one has 20% higher resolution and slightly higher FPS. Which one will look better? I use a 1080p 72 inch 60 Hz screen at 10 feet distance.
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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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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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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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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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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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Video Assets to test transcode quality
I was wondering if anyone knows from where I could get a few (short) video assets in high bitrate to check the quality output of a transcoder.
Some context: A few years ago I was working on a VOD ...
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Is footage recorded through external recorder really better?
Most DSLRs offer 8-bit recording, 4:2:0 with 100mb/s 50/mb/s 500mb/s in their own containers.
Why would shooting with an external recorder (let's say ProRes HQ or 422), make the picture look better ...
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Converting 4k to mkv
I need to send a short video clip (30 seconds) to a client of mine, the video is 3840 × 2160 resolution.
The client is using some cheap, 4k TV and he is using a USB to play the video which only ...
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Is there any use in archiving graded 8-bit footage as 10-bit file?
I've made a video that was filmed with a Canon 60D. It has been graded and edited in Davinci Resolve.
The original footage from the camera is 8-bit. But what happens in the grading process? Will I ...
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Where can one find a current and definitive reference for video quality as it pertains to hosting HTML5 Videos?
At my job, I have encoded our sites videos for a couple years by using X-Media Re-encode:
MP4 1024x576 VBR 1500kbps
WebM 1024x576 CBR 1200kbps
I never had complaints about quality or buffering, I ...
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FFmpeg merge image with video looses quality
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I am merging an image with a video, my command looks like this:
ffmpeg -i background.mpg -i Menu.png -filter_complex "[0:v][1:v] overlay=25:25:enable='between(t,0,30)'" -pix_fmt ...
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Best encoding to fit 10hours of 1080p in 30gb?
I will be running a 10hour loop on a 1080p screen with only 30gb of storage.
The loop will be created from a variety of 1080p .mp4s that will need to be compressed. (for example, one video is 12mins ...
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How to avoid uploaded video being re-encode by Facebook
I just uploaded a video to Facebook yesterday, and then I tried to download the video as HD, and I realized that Facebook actually re-encode the video even though the original video file doesn't ...
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Where can I find design specs for 6mm to 22mm display signage?
I am fine with HD displays, but I would like to know where I can find how to design for LED driven displays where the LEDs are 6mm apart or 22mm apart. What resolution would I be looking for?
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BT.1120 Video Standard Specifications?
I have a camera that states this under the video output specification.
Ive tried finding out what it means but can't does anyknow know ?
user10686
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Best bitrate to responsive (web) video
So, I am a multimedia developer: I develop websites and that nerd things... My last site is responsive (fluid work in all devices - mobile, computer, television,...).
A responsive website needs 4 ...
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Have to reduce the video size with losing the quality
I have a mov file with the size of 74 MB. because of the size it is getting slow to load in my webpages. i would like to reduce my video size. But if i do that by using online compressor the video ...
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AWB and Auto ISO in fast moving scenes
I have recently asked about Auto ISO for video, and got great responses. I would like to have further clarifications in these regards.
I am planning to film an event in a public place. The scene will ...
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Auto ISO for shooting videos with DSLR
I'm just starting shooting videos with a DSLR (5DMIII). I already have a good background in photography. I was wondering if Auto ISO is good when shooting a video or if it is better to tune ISO ...
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Hardsubbing ASS onto MPEG4
I have an ASS as the subtitle stream (with these fonts: - Orotund, jagb_.tff, jagw_.ttf, JUST.ttf, Gabrielle.ttf) in an MKV.
What technique should I use to hardsub this subtitle stream onto the MPEG4 ...
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What is this video dithering effect called + how can i achieve this?
I'm going to make a vlog using this effect since I was looking for a LQ, Nokia-ish footage! What is this effect called and can it be achieved via After Effects? Thank you!
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Transporting Video Signal Over Optical Fiber
I have stumbled upon an issue while doing an application. In this application there is an existing multimode fiber which is installed. We will be using Sony PXW-Z90 and QuestTel's optical extenders. ...
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Vertical edges appear shaky while the camera moves horizontally
I have noticed that in the video
the vertical edges of the rock (I mean the rock that is a kind of a monument just behind the subject) seem to jump back and forth while ...
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I need help creating a good GIF
I am using VSDC to create a GIF image of three images that fade from one into the other. I think I have gotten the fade working well. In the timeline, I fade out one image as I also fade in the next ...
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Action cam - Bad video color in some cases - reason?
if you compare these two screenshots which were made from a video (DJI Osmo Action 4) with the same settings, you see the quality on the one is pretty nice, but the trees in the other one look pretty ...
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What kind of video or audio encoding is causing this?
Trying to stream a video (mkv) on a Samsung 2017 TV and some videos are "lagging" / buggy. I don't know the term for this kind of issue so it's hard for me to pinpoint the problem.
The video ...
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Videos of interacting art (from two different types of art genres)
I was unsure about whether to post this on the Computer Graphics stack exchange. I could also have chosen the Graphic Design stack exchange or the Arts & Crafts stack exchange.
However, as you ...
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Algorithm to perform adaptive quality control for videos?
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I recently had an interview experience that was un-aligned with my software engineering experience, but I still think want to get a better understanding of what the interviewer was asking, which I ...
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Noise artifacts when recording HDR videos
I have a Google Pixel 7 smartphone with support for HDR (10 bit) video recording technology in 4k 30 frames. And I was wondering how the environment affects the shooting of this video format. When ...
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Where to find alternative audio tracks for TV series
How can I add several audio tracks with different translations to a series, as film sites do in some series with 10 translations, where can I find them?
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ffmpeg Config to Produce H.264 Constrained Baseline Profile
It all begins with Plex and appears to end at ffmpeg as the easiest possible solution. I love ffmpeg! I use Plex running on Linux to stream over home network to a Roku. I've used this for years ...
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How to turn-off Anti-aliasing when convert video into gif file with ffmpeg
I want to know how can i turn off Anti-aliasing when i convert video into gif file with ffmpeg, Actually i want ouput in 100% pure aliased gif animation. like this sample image
Here i try this but ...
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Time-lapse vs Drone Video Quality on Linkedin
When we post video on Linkedin, Time-lapase looks bad vs Drone video looks Crisp and clean. Video link and screenshot below.
See below
Time-lapse footage:
Drone Footage
Here is the Link to Original ...
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What output to feed
My question offloading video to composite video for Video 8 (in shot)to view on plane, if my hdmi > SD converter output is 576i50 should I set my source output as high as poss (2160p60 or 50) or ...
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Recording webcam got too big file in 12 hours, spliting the file takes much less space
Sorry I do not give better details, I am too new on this
this weekend we left OBS recording a small portion of the screen, with audio, for an university experiment (we have a software that analize ...
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Export a video to 4k or 2k with FFMPEG and without lag (UPSCALE VIDEO)
how do I upscale a video to 4k or 2k with ffmpeg? youtube encodes the videos which results in some quality loss of the video. So to make youtube use VP09 encoder on my videos, I have to export the ...
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Picture quality of video capture file produced using Virtualdub is excellent when played on my laptop but not on my smart TV. How can I fix this?
I'm trying to digitise some old Hi8 camcorder tapes using VirtualDub 1.10.4 with lagarith lossless codec compression and a Magix USB video converter 5 capture card.
When the captured file is played on ...
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