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Tagged with video-quality encoding
38 questions
14
votes
3
answers
44k
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 ...
- 241
5
votes
3
answers
4k
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.
...
- 151
4
votes
2
answers
6k
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 ...
- 353
4
votes
6
answers
9k
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, ...
- 153
4
votes
1
answer
372
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?
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- 143
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 ...
- 155
3
votes
1
answer
2k
views
How to combine and optimize ffmpeg filters to avoid encoding multiple times?
I never worked with ffmpeg before and I'm wondering which optimization I can take for my situation.
In a loop I have multiple input.mp4 files which I first convert one by one to have a common scale ...
- 33
3
votes
1
answer
1k
views
Reasons for using DNxHD instead of ProRes?
I often use ProRes or DNxHD codec without any thoughts, because the quality is very similar, even though the code and the compression algorithm certainly is very different.
I would like to know in ...
- 2,334
3
votes
1
answer
465
views
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 ...
- 31
2
votes
2
answers
738
views
Is it worth re-encoding GoPro footage to H.265?
Considering that I'm not a professional editor and only record some random skateboard, snowboard or just some travel footage around with my GoPro Session 4, is re-encoding to H.265 to save storage ...
- 123
2
votes
2
answers
6k
views
How do I avoid objects having flickering edges when I encode a screen recording to mp4 using x264 and ffmpeg?
The Goal
I'm creating short tutorials by recording my screen (720p30fps). The content is just a recording of using some desktop software - so mouse moving and opening dialogs, typing, drawing shapes, ...
- 95
2
votes
2
answers
633
views
Encoding Video For Archiving Using Premiere Pro CS6
I have a set of videos created in Premiere Pro C6 and currently I am encoding them in h264 for YT upload. The raws were taken using a Canon 700D @ 720p60.
I was wondering what is the best encoding ...
- 153
2
votes
1
answer
2k
views
How to prevent lossy re-encode of low-bitrate videos uploaded to YouTube
I have a huge number of low-res Flash videos (480x270, 30 fps, 800 Kbps) and I want to resample all those videos in 1280x720 with some added spatial sharpening and lomo filters to make them look nicer....
- 21
2
votes
3
answers
131
views
Why does audio have standard bit rates whereas video does not
I got into live streaming recently and while I was reading up on encoding settings I noticed that even though there are rules of thumb, there doesn't seem to be a standard set of bit rates we could ...
- 23
2
votes
0
answers
99
views
AV1 Encoding Parameters Help - Reduce Variation in Quality from frame to frame
I'm encoding 16 bpc PNG sequences into various lossy video formats for archival purposes because the file sizes are so big. I'm only considering codecs which support 444 and at least 10 bit color. ...
