Questions tagged [compression]

The use of identifying patterns in video to reduce the required data rate required to create a video stream.

34 questions with no upvoted or accepted answers
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1k views

Largest input image size when encoding a video?

I got a bunch of really large 16 bit videos, approaching 65535×65535 pixels in size. These are essentially high quality timelapse panoramas. I want to convert them to a 7680×4320 movie (8K UHD, 8 bit)....
3
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1answer
393 views

AVI Capture in VirtualDub: MP3 Compression

I would like to capture my old VHS tapes to my HDD. I already was successful installing the xvid codec which gives me an acceptable video compression. But somehow I am not able to set audio ...
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0answers
201 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 ...
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0answers
65 views

Before I throw away these massive uncompressed VHS digitizations, what kind of post processing can I do to improve them?

An uncompressed digitized VHS tape is like 60 gigs. Obviously way too big. I can compress it down using H.265 and get basically the same quality. But before I do that, is there any production ...
1
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0answers
13 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 ...
1
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0answers
771 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....
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0answers
112 views

Hardware Acceleration Compression (ffmpeg H264 .mov files)

I'm looking for a (preferably hardware) solution for quickly compressing ffmpeg H264 .mov files. The setup I have has several Edgertronic cameras that are controlled through an API (start, stop, ...
1
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1answer
961 views

Export Frames of 10 BPC Video File with ffmpeg

I have several hundred 1080p 59.94fps 10-bit-per-channel (bpc) AVC-Intra Class 100 MXF encoded video files. I would like to extract the frames of this video file and export them to disk in a 16-bit ...
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0answers
150 views

ffmpeg video compression : Compress captured video being before saving to file

Is there a way one can compress captured video input before saving to file? I have raspberry pi that I am using to record youtube videos. 1-2 min video takes over a Gb of space. I cant compress the ...
1
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1answer
59 views

mp4 to wmv AND file compression

I have a mp4 from a video created in iMovie 10. The original output is about 1.5 GB. I uploaded it to youtube to use their compression and re-downloaded. I now have an mp4 at 236mb. I need to ...
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0answers
24 views

Why does people seem transparent in this video

People seem transparent in that video. What does explain that? I posted on the Physics community, believing that it was related to some optical effect. But I've been told that it may be related to ...
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0answers
8 views

Why does motion compensation need a decoder?

I know that motion compensation is the process of using the motion estimaton MV information and then compensating it to describe only the differences between reference frame and the motion estimation ...
1
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0answers
120 views

Optimizing HTML5 video for best quality

I have a 3 minute video I'd like to embed on a web page. The problem is that despite best efforts, the file size of the video ends up being over 30 mb. I would like the size to be near 10 mb. I have ...
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0answers
194 views

Best possible quality setting for screen recording (not games) and web presentation

Screen videos have text and simple geometric shapes, which need to stay sharp, detailed and crispy. The color should also remain untouched. With screen grabs, I want e.g. IBM blue to show as IBM blue ...
1
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0answers
453 views

If I limit the color spectrum of a video, will it compress to a smaller file size?

I know that in exporting images, if I use an indexed color format when I save (such as GIF or PNG with indexed color mode), I can dramatically reduce the file size of the resulting export. My ...
0
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0answers
22 views

How to achieve the best quality with the least file size for 1 hour long videos

I want to achieve a 1 hour long video from 5 second animation clip with 1920x1080p res, with best quality with an acceptable file size because currently my videos are 100gb + after I render the 1 hour ...
0
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1answer
39 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 ...
0
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0answers
17 views

Including Subtitles in FCPX via Compressor Preset

I am wondering if it is possible to burn-in subtitles (SRT, role) when rendering video via a Compressor preset that is set up as a destination in FCPX? I am not seeing such an option readily available....
0
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1answer
81 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
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0answers
17 views

Modern video encoders/decoders keep producing compression artifacts: what is the (potential) reason?

Follow-up question for: Grime-like blocking compression artifacts on the decompressed video (H.264). Context: while watching videos from time to time I continue notice the presence of compression ...
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7 views

Deduplicating video codec

Say I have a 10 second video that I want to loop 1000 times (not just loop-play it in its presentation form, but have the actual video file be 10000 seconds long). This video will contain the same ...
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0answers
26 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?
0
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0answers
130 views

What is the difference between .mts and .mp4 video files?

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 ...
0
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0answers
22 views

recording uncompressed or > 150000 kb/S video on a smartphone or tablet

Is it possible to record uncompressed or > 150000 kb/S video on a smartphone or tablet? If so, how and what devices are compatible? I am able to do this with cheap logitech webcams, however the ...
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0answers
22 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 ...
0
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0answers
28 views

Are there video motion tests (to point camera at) to assess encoder settings, rates, etc? (currently working in OBS)

I want to measure the appearance quality of motion against a variety of OBS settings in a talking heads video. What is a good way to test for motion in a video recording/capture running 15-60 minutes? ...
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0answers
479 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 ...
0
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1answer
312 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 ...
0
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1answer
210 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 ...
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0answers
12 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 ...
0
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1answer
160 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 ...
0
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1answer
350 views

How can I change/reduce the bitrate of AVI files using Adobe Premiere Pro CC or other tools?

I'm using Eprime and Experiment Builder which requires files in AVI format (AVI-XVid). The files are quite small already (various 2 second clips under 1mb), but are still too large which crash the ...
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0answers
3k views

FFMPEG Tiff images to losseless video (H265) lags, broken output

I have 226 sequenced images (TIFF, 6.2MB each) and i would like loseless save them like video by using H265. Here is command which I used: ffmpeg -f image2 -framerate 25 -i IMG_%03d.tif -vcodec ...
-1
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1answer
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 ...