13
votes
Accepted
Using h264 in loseless mode brings small unexpected results
It's an artifact of the player, not the encoder.
I used the command below to generate a RGB format capture in HuffYUV
ffmpeg -f dshow -video_size 1920x1080 -framerate 30 -i video="screen-capture-...
- 32.7k
9
votes
8bit vs 10bit vs 12bit
I can answer your first question. At the same bitrate and transcoding from an 8-bit source 10-bit HEVC is better than 8-bit HEVC, because it hardcodes dither. archived version of https://gist.github....
- 99
8
votes
Accepted
What CRF or settings I should choose for h265 in order to achieve a similiar quality of h264?
The CRF scales for x264 and x265 do not correspond. x265 CRF 28 is supposed to be equivalent to x264 CRF 23. But x265 is not yet as mature in its development as x264, so take that CRF equivalence with ...
- 32.7k
8
votes
Accepted
Does transcoding always mean quality loss?
Generally, H.264 and H.265 (as well as others like VP9) are lossy codecs, at least in their default settings with most encoders. This means that whenever you re-encode from one to another (or even in ...
- 1,005
8
votes
Accepted
Correct "stripes" in VHS record
Those are interlacing artifacts. They become visible when the motion in the video is faster than the field rate, so that when both fields are combined into a progressive scan image, the movement is ...
- 2,405
6
votes
8bit vs 10bit vs 12bit
In my experience (using handbrake) increasing the bit depth increases the file size but not by much. However, lowering the CRF is what causes significantly larger files. I encoded several times the ...
- 61
6
votes
8bit vs 10bit vs 12bit
I've been running some tests lately (2H2020) concerning reducing the size of some high quality movies of my collection, just for PC to TV 1080p viewing, from 20-30mbps videos to 2-3mbps ones. To that ...
- 61
6
votes
Accepted
4:3 video has 720x480 resolution
There are 2 different things:
The real width and height of frames (in pixels) – see the green part of the following picture.
The displayed width and height (during the playback) – see the blue part ...
- 1,494
5
votes
Accepted
Why does editing a video by Adobe Premiere Pro more than once decreases its quality?
There is a big difference between
saving your project, then returning to the project to do some additional changes, such as brightness adjustments, then exporting a media file, and
exporting a media ...
- 4,730
5
votes
Please explain video bit rate further
Per the OP's request, I will attempt to explicitly answer his single-sentence questions.
First I need you to define bit rate.
Bit rate is the number of bits per second used to encode a video stream (...
- 4,730
5
votes
Why Camtasia always produce video with a low quality, even if I record in 1280p, for example?
The quality of the images you posted look completely normal to me for what you are doing. You're taking a screenshot and scaling it down. That means that anything drawn as a single pixel in the user ...
- 2,156
5
votes
4:3 video has 720x480 resolution
525/60 digitized SD video according to Rec. 601 is indeed 720 pixels wide, 480 pixels high, including some blanking on the sides. Digital equivalent of 625/50 is 720x576. In both cases, frame aspect ...
- 494
4
votes
Accepted
Does repeatedly saving a video degrade its quality?
MP4 isn't an ideal format for intermediate saves. If you know you'll be re-opening the file, save it as losslessly as practicable, and use MP4 only for the final output.
That said, depending on the ...
- 4,674
4
votes
How to change framerate with HandBrake without side effects
FFMPEG is probably a better tool for the job, if you are prepared to deal with the command line. Install ffmpeg from the packages found here. These are all ready-built and should have all the included ...
- 13.7k
4
votes
how to burn full hd movies (1080px720p) in DVD
DVD Video is limited to Standard Def, not High Def (HD). Blu-Ray overcomes that limitation. Alternatively you can use the DVD as a filesystem and play arbitrary media using a computer. But as a ...
- 4,730
4
votes
What is causing these horizontal lines moving vertically up the whiter portions of the video?
You seem to have a flickering light source that is out of sync with the camera's rolling shutter.
Traditional lights
You should first verify that you are filming in 60/30/24 fps in regions whose power ...
- 803
4
votes
What are these rectangular patterns in the frame?
Those are compression artifacts, where the original video has been compressed and has lost data. Block-based coding for quantisation leads to artifacts like this, as the information depth in the image ...
- 2,317
4
votes
Accepted
In what aspect ratio shoud one record with a DSLR?
When you take a photo with a Modern camera "usually" it's 4/3, I know you can change the aspect ratio, but that's not my point. I assume, that the sensors of DSLR cameras are the same ratio, because ...
- 5,412
4
votes
Accepted
Does using an S-Video output via a SCART connector improve the output quality of a VCR?
The answer is probably no, unless the SCART socket on your VCR is labeled specifically as "S-VIDEO". The fact that SCART connector has S-Video pins does not guarantee that your VCR provides ...
4
votes
Accepted
How do I improve sharpness of foliage and distant objects during video recording?
You are most likely observing Optical Aberration - see https://en.wikipedia.org/wiki/Optical_aberration and also https://en.wikipedia.org/wiki/Defocus_aberration. Haze is also likely a contributing ...
- 687
4
votes
What is the video equivalent of vector graphics?
The whole premise of vector graphics is that there is a drawing engine in the output device that can interpret graphical commands and output shapes and fonts at the maximum resolution of its ...
- 171
3
votes
Accepted
Which measurements can I take using which programs to exploit the already low quality and save as much space as possible?
There are a few video quality metrics available for you to use, primarily SSIM and also PSNR. You can use ffmpeg to convert the video and then compare the output.
Step 1 Convert the video
ffmpeg -i ...
- 32.7k
3
votes
Accepted
Usage of Target and Maximum Bitrate with the H264 Codec in Premiere Pro
Sondell spelled it out correctly.
You use the Target to size your final output file, as VBR will be used. AME will then try to average as close as possible to "average out" to your target, yet the ...
- 2,477
3
votes
Usage of Target and Maximum Bitrate with the H264 Codec in Premiere Pro
You seem to have a good grip on what these parameters are all about.
The target bitrate is what the encoder tries to average throughout the video.
The maximum bitrate is the roof for how high the ...
- 106
3
votes
Accepted
Should I shoot at 1080p if I intend to use 720p on the web?
There is no one right answer to this very general question, but here are the considerations. Some cameras (such as the Canon EOS DSLRs) have very naive line-skipping algorithms to decimate their ...
- 4,730
3
votes
Caught between gamma and brightness
You want to adjust a mix of gamma, brightness and contrast, or if available, simply use curves. Gamma impacts the way in which the output intensity corresponds to input intensity, but if you don't ...
- 19.3k
3
votes
Caught between gamma and brightness
Looks like you are ready to enter the world of Lift-Gamma-Gain! These are the three controls that most colorists use to tame light and the sensors that record it. AJ Henderson is putting you on the ...
- 4,730
3
votes
Accepted
How do you dramatically reduce the size of a video while keeping the quality as much as possible?
I'm not familiar with handbrake, but this is basically a math problem.
First, you have to decide on a codec. One of the 'best' codecs in regards to quality/filesize-ratio as well as device-...
- 5,412
3
votes
Accepted
Is 8k UHD or even 4k UHD actually necessary?
It all depends, of course, on what you are watching and where you are watching it. For instance, if you are showing something on a huge screen in a movie theater, you could definitely perceive a ...
- 121
3
votes
Accepted
Video production basics for a noob
I recommend you do a few things.
Take an online course in video editing. You can either sign up for one at something like linda.com, or even just go to YouTube and search for video editing. There are ...
- 2,156
Only top scored, non community-wiki answers of a minimum length are eligible