Questions tagged [video-quality]
The video-quality tag has no usage guidance.
279
questions
0
votes
1answer
9 views
ffmpeg compress video in fast motion in high quality
I would like to compress a video and in the same time to be in fast motion, and this must have as a result a high quality fast motion video.
I tried to run this ffmpeg command which compress video ...
0
votes
0answers
5 views
Parole and MPlayer — colour difference
Intro
I am not sure if this is the right stack exchange sub forum to ask, but anyway...
I was watching a video and I noticed the colour difference when playing it with two different players (parole ...
0
votes
0answers
16 views
Picture degration when importing into FCP
When I Import from computer or download from camera into FCP program I am experiencing degration of the quality of film, and that includes analog, and digital 1080p down or up loads. What am I doing ...
0
votes
0answers
3 views
GoPro Hero8 TimeWarp shot in 1080p 60fps not uploading in HD on YouTube
I've shot a TimeWarp on my HERO8 Black. But I can't upload this particular video on YouTube in HD. YouTube does show 1080 60fps option, but the video is very pixеlated. The issue is in upload, because ...
0
votes
1answer
10 views
increasing sequence resolution in premier pro
I am editing footage with a resolution of 1228x690 in Premiere Pro 2020. When I tried to upload it to youtube, it automatically got bumped down to 480p, significantly lowering the quality. I tried to ...
0
votes
1answer
16 views
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 ...
0
votes
0answers
8 views
Testing if VCR supports S-Video by image comparison. Is it correct?
When I capture a video from my VCR (a Sharp VC-M401SM) with an S-Video cable connected to a SCART adaptor (like the one shown in this post) I obtain a gray-scale image.
One possibility for this is ...
0
votes
1answer
15 views
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 ...
0
votes
1answer
27 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).
...
0
votes
0answers
15 views
Save video with the exact quality of the source file
I have never had success in saving file with same quality after editing. Either it was much bigger, or quality was worse (square blocks etc).
I thought MediaInfo program would help, i used to check ...
0
votes
0answers
29 views
Optimal ffmpeg input and settings for 1080p Youtube video from individually rendered frames (PNG files)
There may be multiple questions in here, so please bear with me ...
I am experimenting with rendering animations (from scientific data / simulations). My code produces individual frames as PNGs - at ...
0
votes
0answers
11 views
Real-time video streaming question
I had been asked recently about sites which live-stream video content such as Twitch.
The more people who are connecting to the site at the same time, can this directly affect the quality or speed of ...
0
votes
0answers
17 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 ...
0
votes
0answers
12 views
Movie quality after zooming in
My laptop screen is 1366x768p (WXGA, 16:9).
If the player (potplayer) zooms in on a 1080p movie (which shows upper and lower black bars) up to 125%, what effetive quality does the movie end up being?
0
votes
0answers
56 views
VMAF wrong results using SVT-AV1 encoder
I have a source video (source.mkv, which is a 25fps 1080p x264 encoded video), and I have reencoded it using SVT-AV1, like this:
ffmpeg -i source.mkv -nostdin -f rawvideo -pix_fmt yuv420p - | ...
0
votes
1answer
25 views
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 ...
1
vote
1answer
73 views
Does using an S-Video output via a SCART connector improve the output quality of a VCR?
This answer reports that in order not to lose quality when digitizing VHS one should use an S-Video cable.
My VCR is a Sharp VC-M401SM and does not have any S-Video output nor a composite output. ...
0
votes
1answer
23 views
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.
...
0
votes
0answers
7 views
Why do my GH5 videos show artifacts only on PC playback?
I imported some Lumix GH5 videos to my PC. 1080p 25fps 420/8bit/LongGOP 100Mbps LPCM MOV files.
When I play the videos on my PC, some or many of the videos get artifacts and banding on any software ...
0
votes
0answers
31 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 ...
3
votes
1answer
44 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 ...
0
votes
0answers
13 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 ...
0
votes
3answers
27 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?
1
vote
3answers
49 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 ...
1
vote
1answer
30 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 ...
0
votes
0answers
52 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:
...
0
votes
0answers
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???
1
vote
1answer
92 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 ...
2
votes
1answer
35 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 ...
0
votes
1answer
25 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 ...
0
votes
1answer
149 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.
0
votes
0answers
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 ...
0
votes
1answer
164 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(...
0
votes
1answer
897 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 ...
1
vote
1answer
375 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 : ...
0
votes
1answer
85 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.
...
1
vote
0answers
13 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 ...
1
vote
1answer
133 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 ...
0
votes
1answer
51 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?
0
votes
1answer
309 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:
...
1
vote
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
...
3
votes
1answer
35 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 ...
0
votes
2answers
43 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 ...
0
votes
0answers
18 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 ...
0
votes
0answers
30 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 '...
0
votes
1answer
46 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.
0
votes
0answers
15 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 '...
1
vote
0answers
273 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 ...
1
vote
1answer
30 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, ...
-1
votes
1answer
50 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 ...
