Questions tagged [compression]
The use of identifying patterns in video to reduce the required data rate required to create a video stream.
160 questions
1
vote
1
answer
78
views
hev1 vs hvc1 - which is better?
I have several MP4 videos that is a mix of hev1 and hvc1 codecs. Some of the playback devices are iPhones.
Is it better to tag them as hev1 or hvc1?
- 11
0
votes
0
answers
15
views
Youtube crappy quality after upload
I made a PNG sequence video to mimic a write on effect. Problem is, it looks very good on my pc. But when I See it on youtube, the quality is horrendous. I've attached various timestamps of the video ...
0
votes
0
answers
10
views
How to compress a 100GB video effectively to smoothly play it on TV via Google Chromecast
How to compress a 100GB video effectively to smoothly play it on TV via Google Chromecast?
The video is 2160p converted from BlueRay disk.
The video is on my Macbook Pro computer and I play it with ...
- 133
0
votes
0
answers
41
views
Does HEVC/H.265 "slower" preset introduce artefacts?
I have been experimenting with HEVC/H.265 compression parameters to find a sweet spot balance between file size and quality for a 1080p/H.264 recording of a festival with lots of details and flashing/...
- 125
0
votes
1
answer
56
views
What is this video dithering effect called + how can i achieve this?
I'm going to make a vlog using this effect since I was looking for a LQ, Nokia-ish footage! What is this effect called and can it be achieved via After Effects? Thank you!
- 11
0
votes
1
answer
77
views
How to find out if a video file has picture types P and/or B and uses inter-frame prediction optimally?
Over on Super User, I asked the question, "What file properties affect the size of a video file?". A comment from Gantendo taught me about picture types and the apparently equivalent frame ...
- 101
1
vote
0
answers
17
views
Why I cannot seem to get a good image in 360p Youtube?
This is a Canon M50 4K footage [manual focus] using Kit-lens, using very fast shutter speed around 1/300, ISO around 400, and Aperture f/4. (No edit just straight from the memory card)
...
- 111
2
votes
1
answer
3k
views
What does the tag "-tag:v hvc1" means?
I am using FFMpeg to compress a video to X265/HEVC. When I am doing it normally the converted video doesn't working on iPhone or iPad. But while I am using the tag - "-tag:v hvc1" in the ...
- 135
0
votes
1
answer
302
views
Why X265 conversion is very slow on some devices
When I am converting my video using FFMpeg, I am using x265 to do the compression. But the issue is this conversion is much much slower. But while I am using my iPad 6th Generation, this works much ...
- 135
0
votes
1
answer
90
views
What improvements can I make to my FFMPEG script?
I am trying to create an FFMPEG script for some of my emulated game captures. I normally use Virtualdub2 (formerly Virtualdubmod) to upscale and trim my game captures for YouTube. With my laptop gone ...
- 51
0
votes
1
answer
16
views
Image sequence format for working with Blender and Apple Compressor
Previously, I rendered a 3D animation in JPEG-2000 format, thinking that Preview supports it, so apple pro apps must also support it, but it turns out, compressor can't take J2K image sequence and ...
- 148
1
vote
2
answers
26
views
How do I avoid noise when speaker is further away?
When the speaker is further away from the microphone, noise gets louder as (that is my assumption) the compressors wants to compensate for the missing loudness.
An audio sample can be found here:
...
- 167
1
vote
2
answers
216
views
How can I easily shrink over-large MP4s where high quality is not relevant?
I have some smartphone video that is absurdly large for what is low-quality casual video: 100MB per minute. What is the easiest way to compress this (on Mac) using command-line or GUI, given that I ...
- 111
0
votes
1
answer
240
views
Suitable alternative to Quicktime RLE for alpha-containing non-cartoon videos?
I'm producing a product that involves a composition of several videos, over alpha layers, and there are surprisingly few options aside from image lists. Quicktime's RLE (Run-Length Encoding) codec ...
- 170
5
votes
0
answers
202
views
Optimized Parameters of `FFMPEG` for Screen Recording
Windows has a great codec for screen recording called Windows Media Video Screen.
It generates artifacts free videos which are highly compressed (small size).
I was wondering, what would be the ...
- 151
0
votes
1
answer
456
views
How can I build a MOV (QT-rle) file with minimal unnecessary features?
I understand that my title requires further specification, so allow me to elaborate.
I recently finished a model in Blender and rendered 1000 frames to PNG with alpha. The total size was roughly 2 GB ...
- 170
1
vote
0
answers
88
views
Can MKV hold multiple images in sequence (i.e. slideshow?)
Everything I'm searching for is for people who want to have their album artwork incorporated into a video. What I'm asking is if MKV can hold multiple images in succession, i.e. for videos like this ...
- 11
0
votes
1
answer
196
views
ffmpeg and ffprobe existing library or an add-on, pros/cons of building one myself
I work with video creation, animation, or fix video elements for several broadcasters in my area. My pipeline includes ffmpeg suite of libraries, and I have written one plugin specifically for ffmpeg ...
- 101
0
votes
1
answer
577
views
ffmpeg best parameteres for fastest compression on FullHD mp4?
I need to compress a bunch of FullHD(1920x1080, 3Gb, mp4) videos, each ~2 hrs long. Some loss of quality is okay as is the lower resolution. I'm shooting for a 500Mb output video in ~10 min processing ...
- 101
0
votes
1
answer
446
views
What causes the 1080p version of a video to be blocky but the 4k version look perfectly fine?
I'm a complete beginner in all things photography, video compression and YouTube uploads so please bear with me. I recently uploaded a 4k 30fps video to YouTube, and when I select the 4k option it ...
0
votes
1
answer
620
views
Compress multiple videos at once on a Mac
I want to reduce the file size of a bunch of videos at once on my Mac.
Would you know any free tool that does that or any way to automate a loop in Automator to pilot Handbrake to loop on a given ...
- 101
0
votes
0
answers
54
views
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?
- 101
1
vote
1
answer
254
views
Resolution loss by chromatic subsampling: is there a workaround?
I was trying to make some recordings of a game (with OBS), but it wasn't really good even with "lossless" options. Some part of the interface was just pixelated... After a while I realized ...
- 113
1
vote
1
answer
6k
views
What is the difference between .mts and .mp4 video files, and which is better to edit?
I know that .mts video files use MPEG-4 video compression. But why then don't they just have the .mp4 file name extension?
Since they don't, this means they are not digitally nor conceptually ...
- 223
0
votes
0
answers
49
views
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 ...
- 101
0
votes
0
answers
767
views
Streamable Container for gstreamer with ngnix / RTSP on jetson nano
Im working on this project :
https://www.hackster.io/jonmendenhall/jetson-nano-search-and-rescue-ai-uav-9ca547
At some point I will need to mount my camera (waveshare ; IMX219-77IR) on top of the ...
- 103
1
vote
1
answer
27
views
GIF/SVG kind of compression for Video
I am looking for a solution to compress screen recording. Imagine a coding tutorial involving mostly text and windows and almost no graphics other than icons and occasional view of the wallpaper.
...
- 111
1
vote
0
answers
74
views
Does exporting to lossless HEVC prevent loss when re-exporting an already exported video file?
Software: After Effects, Premiere Pro
So I had a little bit of trouble with my main PC and can't get it fixed before the deadline of my client. I already had the final video ready and exported before ...
- 11
1
vote
1
answer
125
views
What's the best way to visually compare codec compression?
Maybe I'm mistaken, but a long while ago I seem to have read an article about comparing videos encoded by different codecs.
Basically what I think what was done, was to put them together in a timeline ...
- 236
0
votes
1
answer
20
views
Decrease size of a avi video with lowest quality loss
I have been working on an animation with Blender. Further I rendered it at 24 fps at 1080p resolution.
The problem is that the rendered video is around 30 seconds and has size around 4.3 GB.
Is there ...
- 1
1
vote
1
answer
52
views
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 ...
- 113
0
votes
1
answer
9k
views
Video artifact removal and restoration - How can it be done? (Really?)
I have been researching this for the past couple of days, and all I could find on the subject were a bunch of research papers, a demonstration video of a model that isn't publicly available, and a ...
- 11
1
vote
1
answer
847
views
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 ...
- 111
1
vote
1
answer
1k
views
Is video output in YUY2 color space lossless if the input is sRGB?
I am considering purchasing one of these:
https://static.cloner-alliance.com/manual/ca-1080fl_user_manual_v1.1.pdf
It claims to be able to capture "uncompressed video", but in the list of ...
- 123
1
vote
1
answer
89
views
compress video for backup
I want to compress a video to store it for backup purpose.
By that, I mean that I don't need to play video when it is compress format. So I don't want to lose quality or something like that, just ...
- 125
0
votes
2
answers
960
views
Merge multiple video files using ffmpeg by adding multiple compress options
I would like to merge multiple video files, performing in the same time complex compressing options.
How can I do that? The following ffmpeg command resulting this error:
Filtergraph 'scale=1280:...
- 173
0
votes
1
answer
561
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 ...
- 173
0
votes
1
answer
44
views
Compressing video recording- file gets bigger!
i have recorded a part of my screen (2624x1714, 8 hours, ca. 30 GB), then trim and cut in final cut pro. Now I want to compress it with Compressor. I set the output to HD 1080p but the file doesn't ...
- 23
2
votes
0
answers
1k
views
Why has grayscale a higher bitrate than YUV with H.265/HEVC?
For compression purposes, I am re‐encoding a grayscale video to the H.265/HEVC codec. Although the input video is more or less perfectly grayscale in aspect, it is provided in the yuv420p pixel format....
- 121
9
votes
3
answers
54k
views
Is there any AI upscale tool for videos?
I’m working on an amateur project, and for part of my project I’ll be using some old, really, really low-res film. I’ve used some free online tools (like deep-image.ai) to upscale low-res photos ...
- 91
0
votes
0
answers
13
views
Tipps on streamlining my recording and editing process
So i was having problems with editing videos and got some good tips here.
For more Context: Original question
and it got me thinking on maybe streamlining my process a bit, maybe i can get some ...
4
votes
2
answers
6k
views
Producing small H.264 files with Adobe Media Encoder vs ffmpeg/libx264
I am a terrible ignoramus in the subject, but the coronavirus has thrown me in the business of producing videos with my lectures. I care a bit for video quality and a bit more for small size. My ...
- 43
0
votes
1
answer
38
views
Shooting short clips vs. cutting long clips
Say I want to create several short clips with the original encoding of a certain camera. Do I have to shoot the short clips directly or can I shoot a long clip and then cut it up using ffmpeg with the ...
- 133
1
vote
3
answers
204
views
How to clean up old animated footage?
Recently I ripped a couple of old DVD's to preserve them.
The original rip has a resolution of 720*576 and runs with 5100kb/s on 25fps interlaced.
I tinkered around with Handbrake and (hopefully) ...
- 11
1
vote
1
answer
353
views
h264 compression keeps same number of frames?
I'm trying to understand how h.264 compression works. So far I have clear what I, P, and B frames are and how are they used. But I'm unsure of is if after this process the number of original input ...
- 11
2
votes
0
answers
497
views
Efficiently compressing a looping video with h264
I have a video that is initially 19 frames long and lasts for about 0.5 seconds, it's 432kB.
I've looped it over three minutes and the resulting file is quite large (200MB).
Using FFMPEG is there a ...
- 121
-1
votes
1
answer
15
views
What is a cost effective app to resize, crop & save a MOV file to a reduced size?
I am planning to buy an HD animation which is over 500Meg in size.
I need to resize, crop and reduce the file size to about 10Meg.
I prefer not to deal with Adobe Media Encoder or something like ...
- 101
2
votes
1
answer
200
views
Camera flash produces unwanted artifacts on the video
During frame by frame watching of some video taken via Instagram app one noticed strange unwanted artifacts on the video caused by camera flash. Please, consider below several sample image frames ...
- 125
1
vote
2
answers
2k
views
error editing a long video using VirtualDub2
I have several long video files that I need to edit (remove some initial parts, breaks and dead moments) and I always got errors when I try to save / export the edited file in mp4. The
pcm_f32le: ...
- 113
1
vote
1
answer
66
views
Is there a tool that lets me cut video with frame precision?
I'm able to use Avidemux with enough ease and it's mostly enough for my video need. I can also choose codecs to recompress the video.
Unfortunately, it doesn't let me cut video outside the scope of ...
- 111