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Questions tagged [video-quality]

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14 votes
3 answers
42k views

8bit vs 10bit vs 12bit

I do a lot of HEVC encoding and what I've read is 10bit is always better than 8bit, even from an 8bit source, because it avoids rounding errors. Is that true? Also, then is 12bit better than 10bit or ...
Fallen's user avatar
  • 241
14 votes
2 answers
11k 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 -...
user3450548's user avatar
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10 votes
4 answers
4k views

How to digitise old NTSC home videos for highest quality (with PAL player)?

I have some old VHS home videos that I'd like to digitise to preserve them, and I'm looking for the "best" way to do that with my setup. The videos were recorded around 1990, in the USA. I'd say they ...
jdm's user avatar
  • 201
9 votes
3 answers
11k views

Do video formats support colour profiles?

Recently, I was reading a wiki, dedicated to one popular cartoon show and stumbled upon an interesting problem: From left to right: frames from the US iTunes, Australian iTunes and US iTunes version ...
Oleg Kuznetsov's user avatar
9 votes
1 answer
2k views

What codecs/formats are appropriate for full motion video recording for youtube?

I'm recording video game footage via lossless methods, after which I need to compress them and upload them to youtube. I'm not sure which format and/or codecs are best for this. I've been ...
Zelda's user avatar
  • 723
8 votes
6 answers
8k views

Screen refresh rate above 100 Hz noticeable?

Is a refresh rate higher than 100 Hz still noticeable for the human eye? Tv manufacturers are still taking these refresh rates to new heights, but is there really a noticeable difference between a ...
jan's user avatar
  • 205
8 votes
1 answer
31k views

What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264?

I'm doing some experiments with HEVC x265. I have a raw footage and the quality of details of h264 with same CRF setting looks better than h265. Shouldn't be the opposite? Maybe my setup isn't the ...
user3450548's user avatar
  • 1,720
7 votes
1 answer
575 views

What equipment do I need to be able to produce 'HD quality' videos?

For starters, please forgive me if this question is very amateurish - if they sound that way, that's because I am an amateur. I would like to start shooting some webisodes in my garage and want to ...
marcamillion's user avatar
7 votes
2 answers
658 views

What video codecs can provide "adaptive quality"?

Background: I am trying to compress lossless bluray tracks to a more storage friendly size without a huge loss in quality. What I've been doing thus far: Exploring compression options with ffmpeg. ...
Bryan Austin's user avatar
6 votes
4 answers
32k views

Looking for an 80's VHS effect!

I'm looking for a way to turn an HD video clip into 80's style VHS low-quality. Here is an example of the look I'm desperately looking for: Thank you!!!
Pavel P's user avatar
  • 63
6 votes
1 answer
11k views

FFMPEG output is blocky

I'm attempting to extract the individual frames from a raw AVC video stream. I'm doing this via the following ffmpeg command: ffmpeg -q 1 -i video_test.avc -f image2 frames/frames_%04d.jpg The ...
CadentOrange's user avatar
6 votes
2 answers
21k views

Usage of Target and Maximum Bitrate with the H264 Codec in Premiere Pro

When exporting a video using the H264 Codec with a variable bitrate in Premiere Pro, you can set the target bitrate and the maximum bitrate. I would like to know how those work together and if there ...
MoritzLost's user avatar
  • 5,442
6 votes
1 answer
3k views

How does YouTube convert between different videos resolutions?

What algorithm does YouTube follow to convert between different formats? Does YouTube store different videos (for different formats) on disk or store only 1 and convert from this to appropriate format ...
a.m.'s user avatar
  • 161
5 votes
4 answers
2k views

Can Sony Vegas Pro be used or compared to the output produced by Final Cut Pro for professional use?

I am a PC user and use Sony Vegas Pro. I really like it for editing purposes. I do not like Adobe Premier or Avid which work on Windows and believe that the top 3 tools are AVID, Sony Vegas, and ...
Vass's user avatar
  • 165
5 votes
3 answers
3k views

How should I interpret the results from Netflix VMAF

I've been encoding some clips and then analyzing them with the VMAF tool from Netflix, but I don't know how to understand the results. This is the overall mean section of one of my tests. ...
chew socks's user avatar
5 votes
1 answer
2k views

Avconv rotating mpeg4 - video loses quality

I'm a newbie in video editing on linux and am trying to rotate a video I took with my phone using AVCONV on an Ubuntu 12.04 machine. It all seems to go honky dory except the output is losing quality. ...
Shakus's user avatar
  • 151
5 votes
2 answers
7k views

T5i video quality doesn't even match smartphone camera? Where can I improve?

A friend wanted to make some professional looking videos for a weekly vlog type of thing for his church. We went into this planning to buy a better camera and lights etc as we go. We filmed a video ...
Kenmore's user avatar
  • 153
5 votes
3 answers
289 views

What's the best way to record a skype conversation?

I need to record a skype conversation and upload it to youtube (it's a live conference and the other party asked for it). Can I record a skype conversation? What would be the best way in terms of ...
Ignorante's user avatar
  • 151
5 votes
1 answer
752 views

QoS for video streaming

What are the most used metrics to evaluate the QoS of a video streaming session? I am looking for tutorials, papers, lecture notes, ppt, anything of that kind, or your own answer.
zzzbbx's user avatar
  • 309
4 votes
2 answers
5k views

4:3 video has 720x480 resolution

I was trying to do some video editing and encoding. I have a so-called SD video that should supposedly be in 4:3 aspect ratio. But instead of 640x480, it is 720x480. Interestingly, when I play it with ...
angel_30's user avatar
  • 353
4 votes
1 answer
312 views

Correct "stripes" in VHS record

Recently I recorded my old VHS tapes to my hard disk. There is one thing bothering me concerning the video quality. Whenever the camera moves, the motion produces visible "stripes" in the picture: It ...
arminb's user avatar
  • 173
4 votes
6 answers
8k views

Does repeatedly saving a video degrade its quality?

I take a video file, let's say an mp4, and use, let's say Windows Movie Maker, to repeatedly just save it, with no edits. Every time, the software has to convert the video into a format it can edit, ...
Jeff Caros's user avatar
4 votes
2 answers
2k views

Smartphone vs camcorder

Okay, so I'm a young A/V tech, and I'm looking into picking up some equipment for video recording. The guy who is mentoring me said that for the kind of work I do, which is primarily speaking events ...
Codimeister's user avatar
4 votes
1 answer
122 views

Is it possible that the actual video resolution of the t2i/550d is not 1920x1080

I don't know if i'm doing something wrong or this is the way my camera (550d/t2i) works. It seems to me that the video is softer than it should be. To test this I made a picture and video using the ...
nicudotro's user avatar
  • 143
4 votes
1 answer
8k views

Why is my video alternating between blurry and sharp?

I notice this on a regular basis while watching videos I've downloaded. The image will alternate pretty quickly between blurry and sharp and sometimes the effect is quite drastic. Below is an example ...
Vian Esterhuizen's user avatar
4 votes
1 answer
68 views

Is it better to scale video or images when doing time-lapse?

Without caring for speed of processing, extra disk space needed, and other such factors, which of the following two is better (i.e. produces higher quality/better compressed video). Scale each ...
v010dya's user avatar
  • 870
4 votes
2 answers
54 views

what kind of action cameras are good for 1080p video onboard a high moving object(more than 800kph)?

I'm working on a project that will have a camera onboard the object for FPV as it moves in the air at very high speeds. What kind of frame rates are good to transmit and/or record onboard the flight, ...
Rajath Pai's user avatar
4 votes
1 answer
305 views

H.265 disadvantages with video dimensions not multiple of 8

Are there any disadvantages (like worse image quality/more compression artefacts) when encoding a video in H.265 with dimensions that are not a multiple of 16 or 8, but instead a multiple of 4 or 2? ...
YourMJK's user avatar
  • 143
4 votes
4 answers
5k views

Video format with dynamic resolution

Are there any video formats that change resolution per frame and with different resolutions at different parts of the screen? All videos I know today they have fixed resolution. For video blogs I ...
Waldemar Wosiński's user avatar
4 votes
1 answer
1k views

How to reduce the size of video to 700 mb

Please help me , I have copied some movies to laptop from dvd disk, but the size of movies are more than 2 gb. But the movies uploaded to torrents are only 700 mb with the same clarity. How to reduce ...
Jayanth Bharadwaj's user avatar
4 votes
1 answer
18k views

Rendering without quality loss in Kdenlive

I've used SimpleScreenRecorder for screencasting. The settings are shown below. This file is of very good quality. I've then added this clip to the Kdenlive project with the same settings as the video....
Renae Lider's user avatar
4 votes
3 answers
7k views

How can you fix color banding from VHS video tape in post-processing?

Old VHS tapes often have horizontal lines/bands that slowly scroll up or down the video during playback. This video is already on DVD, so I am trying to remove the banding in post-processing. The ...
user1491819's user avatar
3 votes
4 answers
6k views

How can I make professional video using an iPad?

I am willing to make an educational guidance video. And since I want to make it using an iPad, what things should I keep in mind? And which specific camera app will be better over the inbuilt camera ...
dking's user avatar
  • 51
3 votes
2 answers
7k views

Does transcoding always mean quality loss?

Can I transcode video from h.265 to h.264 without loosing quality? My instinct is that it should be fine, that with approximate quality settings the new files will be the same quality but larger file ...
John's user avatar
  • 133
3 votes
1 answer
195 views

why movie video is different from other videos (sports, news, or other)

I'm not a video producer or anything but I always noticed the different of the image from a movie vs a regular video. I'm curious, re they shot on different camera types or it's just post-production ...
bornie's user avatar
  • 133
3 votes
2 answers
140 views

How can I make a video such that the quality degrades if someone tries to record it using screen recording software?

How can I make a video such that the quality degrades if someone tries to record it using cam-studio or similar software? We create music videos which are often subjected to piracy. Although the CDs ...
Asutosh Panda's user avatar
3 votes
2 answers
902 views

Compare an original video with a transferred video?

I want to compare an original video with the same video but transferred through a device. How can I do that? I want to compare them to improve the transferred video quality. The video is transferred ...
Farah13m's user avatar
  • 103
3 votes
1 answer
2k views

How to Record a Dark scene without any Noise?

I am using Nikon D3200, I am trying to shoot a dark scene. The scene is so dark and there is minimal amount of light. I am shooting in manual mode and these are my settings. ISO 200, f/5.2, Shutter ...
Taha Kirmani's user avatar
3 votes
2 answers
5k 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. ...
simonet's user avatar
  • 143
3 votes
2 answers
301 views

Caught between gamma and brightness

I have a video source that, to my surprise, has a lot more detail than I could at first see. Turning down gamma I could see details in a bright part, turning up gamma I could see details in a darker ...
fidetrainerNET's user avatar
3 votes
3 answers
5k views

For a given bitrate, what video resolution is perceived as the highest quality?

I'd like to achieve certain approximate bitrate for video encoding. If I use higher resolution like 720p, I'll get more fine-grained image, but more encoding artifacts. If I use smaller resolution ...
Petr's user avatar
  • 143
3 votes
2 answers
882 views

1080p60 recording has very strong compression artifacts, default Neat Video not reducing them much

In attempting to record in the highest quality on a JVC GC-PX100 camcorder, I've been recording 1080p video. Unfortunately, viewing the video upon edit shows very strong compression artifacts, which ...
Anti-weakpasswords's user avatar
3 votes
1 answer
70 views

Bluray I/O speed

I don't know if this is the correct place to ask this type of question, but here is it. I wanted to find a ball park size of each blu-ray frame size in bytes. This is my calculation which cannot be ...
Armen Babakanian's user avatar
3 votes
1 answer
4k 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 ...
mustafa candan's user avatar
3 votes
1 answer
360 views

What are these rectangular patterns in the frame?

This frame from a video about a camera, has, as you can see, a pattern made up from rectangular boxes. Is it just the pixelation? Or something else? *you can see the video by that frame here
user152435's user avatar
3 votes
2 answers
2k views

DSLR RAW video: 1080p or 720p?

This question has probably been asked before, but could not find it. With the possibility of recording RAW video on a DSLR, file size matters because CF cards are limited. File size can be reduced by ...
zzzbbx's user avatar
  • 309
3 votes
3 answers
1k 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 ...
angel_30's user avatar
  • 353
3 votes
1 answer
491 views

How to fix video shot vertically on a smartphone?

I recently committed the crime of shooting video vertically, and now when played anywhere except on my phone the video renders sideways. What is the best method to rotate it (using PC software), ...
Hashim Aziz's user avatar
3 votes
1 answer
6k views

What is the difference between 'Set To Frame Size' and 'Scale To Frame Size'?

In Premiere Pro CC; what is the difference between 'Set To Frame Size' and 'Scale To Frame Size'? I need to blow up a video to fill a larger frame. I am going from SD 720x480 to HD 720x1280 frame ...
clarkland's user avatar
3 votes
1 answer
1k views

Video Quality Assessment (No-Reference)

I am looking to analyze the quality of videos using some no-reference methods. ie. I don't have a reference video to compare my videos with. I want to identify frame-freezes, jitter, jerkiness etc. ...
Gufran Pathan's user avatar

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