Questions tagged [video-quality]

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How to get rid of YouTube compression artifacts in 4K video

I'm trying to upload a 4k video to YouTube. I exported it using DaVinci Resolve without any compression (uncompressed with YUV 422 10-bit) expecting it to be in the highest possible quality. However ...
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FFMPEG Highest quality without highering bitrate

I need the highest possible quality without needing to raise the bitrate or changing the codec (h264). I came up with this command ffmpeg -c:v h264_cuvid -i input.mp4 -preset placebo -b:v 1400k -b:a ...
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Compounded problem with progressive, wrongly deinterlaced and resized file

I'm correcting a couple of videos of which the mini-DV tapes have gone missing, but the video streams have been incorrectly converted in the past using handbrake. I think in the coding/de-interlacing, ...
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What actually distinguishes various MPEG-4 Part 2 video codecs (divx, xvid, mpeg4, msmpeg4v1, mp4v, etc.)

I recently audited a large folder containing a variety of encoded videos from 2002-2014. Using ffmpeg, I extracted and recorded metadata, including the video codec used on the film. An example command ...
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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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GoPro's denoising artifacts

When shooting a piano from overhead with a GoPro Hero10 Black, the hands' skin texture and knuckle wrinkles are smoothed so much that it looks like a plastic mannequin. It looks like what PhotoShop ...
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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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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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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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Interesting features to use in FFmpeg

What are some interesting features or filters of FFmpeg that can lead to fun use-cases or used for improved quality? For instance, motion interpolation feature to increase FPS for better quality was a ...
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FFmpeg 5.0 vs 3.4 performance

I was trying to compare ffmpeg 5.0 vs version 3.4.6 in how much performance improvements I would get while transcoding a simple 720p video into a H264 video. On my laptop, I noticed around 5-10% ...
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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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360 views

H264 AVC codec Baseline@L3.1 vs High@L4.2

When I convert a video with ffmpeg, and use mediaInfo to review the metadata, I see the followings for the video codec: Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L3.1 ...
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How do I verify that the H264 video stream is encoded with a single slice per frame?

I'm a software tester and I need to test a certain requirement for a vehicle camera that I'm not sure on how to test. As in the title it's to verify that each frame is encoded with a single slice. ...
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Confused about Bitrate

I am recording demos using a screen recorder (Wondershare DemoCreator) which will be uploaded to a video streaming website. The website has certain recommendations for video quality like, Codec: H.264 ...
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AE Animation Bad Quality on YouTube

I've created an animation in After Effects, and dynamic linked the composition into Premiere for audio editing. Then I exported from PR using Media Encoder. The exported file looks good, but when ...
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Does changing pixel format negatively affects quality of the result (yuv422p10 to yuv420p) – using ffmpeg

I have a ProRes video in yuv422p10 pixel format. When I transcode it for distribution into h264, I can either use baseline profile where I am stuck with yuv420p or use another profile and keep ...
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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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MP4 file has incorrect length (duration) and plays back 5x slower than it should

I have five GoToMeeting (GTM) .mp4 recordings that I saved and downloaded from a five-day class I was teaching. Each recording represents each day's appx. 8 hour class duration. I am importing them ...
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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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Ways to faster video streaming on video apps

I'm studying short-form video delivery apps like Instagram and nowadays, TikTok, especially as it relates to faster video streaming and lower playout latency. We understand apps like Youtube or ...
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FFMPEG: "smart encoding" when join video clips

is it possible join some clips of h.264 (or h.265) without re-encoding, (or minumum re-encoding, only where clips touch themself? Thanks!
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ffmpeg VBR 2 pass with concatenation and normalization of pass log possible?

Rephrasing the question: Say I have multiple files that I do pass1 on which generate pass logs. I want a concatenated result video of an output of pass 2 given all of the pass 1 log files. Is this ...
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FFmpeg - Loss of video quality when using vf setpts

I created a screen recorder for iOS using FFmpeg. I concat the images into a video which is fine and the quality doesn't change much from the screenshots but when I use setpts to match the video to ...
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Tips for making choppy video less jarring

I produce a podcast that I also publish to YouTube. It's just two talking heads having an interview. The recording of my most recent guest came through very badly. The audio sounds fine, but the ...
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What is the best format to digitalize Video8

I would like to digitalize some old Video8 tapes (e.g. SONY Video8 MP60 8 mm, single play 60 min.) Unfortunately, I do not have the time to digitalize them by myself. I found a lot of providers online....
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360video - POV Learning Scenarios

I'm working for an educational facility for social workers and have a project to shoot 2 scenarios, of physical escalation with therapists and patients with cognitive disabilities, in POV. The ...
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2 answers
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Improve quality of recorded screen

I tried a lot of different screen recording software but all of them can't record a video with the same quality I see on screen: looks like there is a unsharp mask, or something similar. Now I'm using ...
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Export DCP from Adobe premier pro

Hey guys I’m struggling to export feature film 2hour 20 min long DCP from premier pro. 1.I already exported 422 Hq. 2.Made separate project with new sq. 3.Using Adobe encoder as well. 4.Every time my ...
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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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64 views

What is the difference between lossless and lossy formats?

What exactly are the differences between lossless and lossy codecs? And is one better format better than the other or is it mostly relative?
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How to get ffmpeg configuration similar to that of youtube for 480p and 1080p video? I have got a function but the output quality is too low

Hey guys I am learning to develop a website that converts videos to youtube quality (or close enough) 480p and 1080p, I am not much familiar with ffmpeg and struggling with its documentation. I have ...
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Does YouTube accept AviSynth .avs scripts for uploading?

Without reencoding videos first? Is it possible to browse for .avs file and upload it, provided AviSynth is properly installed locally?
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What is the video equivalent of vector graphics?

Images and videos have their own quality standards and protocols. There are either raster image file formats (.gif, .jpg) or vector graphics images (.svg, .pdf). No matter how much you zoom in on ...
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Why does my ipad/macbook video camera quality not match logitech hd c270 quality?

I am trying to write a program that takes a video of someone's face, extracts the RGB values, and then uses the color change (imperceptible to the human eye) to map onto heart rate. When I use a ...
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Kdenlive preserves original quality

Sometimes I use Kdenlive to cut videos because it is convenient. Something bothering me is that the application goes to the re-render process which has no point. I also have no idea what quality to ...
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1 answer
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Why is ffmpeg producing a background?

I am a chemist and since a few weeks I am making short videos with ffmpeg by combining images, I am using the command below (for some reason without profile:v high, powerpoint crashes when I would ...
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1 answer
2k views

How to preserve colorspace in ffmpeg

I have a x264 video with yuvj420p(pc, smpte170m) color space and i want to convert this video to x265 and reduce its file size. I have used this command ffmpeg -i input.mp4 -vcodec libx265 -crf 20 ...
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Is 8 Bit 4:2:0 chroma subsampling "good enough" for chroma key?

My school bought a Panasonic 4K camcorder (which I don't remember exactly which model) pointed at a green screen and this got me thinking. If it's a HC-X1000 with it's tiny sized sensor and 8 Bit 4:2:...
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How do I improve sharpness of foliage and distant objects during video recording?

Lately I have tried recording some video using my old Canon. While I achieve decent results during macro shots and while filming human beings, I have noticed that foliage and distant objects in wide ...
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1 answer
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Making a YouTube video from powerpoint presentation file with embedded audio file

I have a power point type file (.odp in ubuntu linux) with embedded audio file in it for presentation. How can I make a good quality YouTube video from that? I have used kazam screen recorder for that....
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1 answer
1k views

How to output high quality Zoom webinar video after editing with Premiere Pro?

I used Adobe Premiere Pro in editing a Zoom webinar video, I noticed that after editing and exporting it, the resulting file size of the output file appeared blurry compared to the original. The file ...
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1 answer
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Optimizing ffmpeg settings for high-entropy / HIGH-DETAIL ANIMATIONS towards uploading to youtube

Based on this older question, I am looking for a good "transfer video codec / compression" for rendering videos from BMPs and/or PNGs and uploading them to Youtube. I am dealing with a lot ...
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compare two video then cut the different

I have 2 video files with the same content, but coming from a different source. They have a slight difference in 'cut' and language dubbing, meaning one can be missing a shot compared to the other. I ...
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Standard way for handling different resolutions when concatenating videos

I am building a small tool to take the short videos I record from different devices (e.g. iPhone, camcorder, etc), and concatenate them together chronologically. Everything is working up to the point ...
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Final cut pro export file size is huge (despite the small size of the initial video) - how can I shrink it?

I'm a complete novice at final cut. I have recorded a dnd game over zoom, it's a 2 hour video, the file saved from zoom is 756mb. I have edited it a bit (just minor stuff, add a couple of images, ...
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1 answer
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Decrease video size post-editing

I am using a video editing software to edit my videos for YouTube. The scenario is as below: Input file size: 80mb. Input type: webm. My expectation after editing : Video size: around 100mb. (Any ...
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How to create a educational video by only using your voice and some photos

I would like to create some educational videos in which I will use only my voice and some photos/text headlines, notes etc. on my Mac computer. I am aiming at creating videos that are as much as ...
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1 answer
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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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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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