Questions tagged [video-quality]
The video-quality tag has no usage guidance.
224
questions
0
votes
4answers
31 views
Re-encoding Lossy formats with Lossless formats
I was re-encoding videos downloaded from YouTube with Lossless H.264 (using FFmpeg) because I'm experimenting with CRF=0.
I found that resulting videos are much bigger (1 gigabyte) than the original ...
1
vote
1answer
88 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 ...
0
votes
1answer
14 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 ...
2
votes
1answer
20 views
Recording a two speaker event with large audience
We are doing regular events with two speakers on the floor who have their own presentations in parallel.
The event is a live hacking presentation, one speaker is the moderator and victim, the other ...
0
votes
1answer
24 views
How to output high quality 360 VR video with Premiere Pro?
When editing a 360 video in Adobe Premiere Pro, I noticed that if I import the video into the program and export it again without any additional changes, the resulting file size of the output file is ...
0
votes
1answer
5 views
Trying to improve choppy ipad screen capture
I'm trying to improve the choppy screen capture that I'm getting on my ipad.
The screen capture plays smoothly when viewed on the ipad itself, however it is choppy when played on my pc in vlc, and ...
1
vote
2answers
25 views
How to shoot my whole life from first POV?
I would like to shoot whole my life (24h, 365d etc) on video, like as through my eyes.
However I came to dead end trying to match recording times of modern action cameras, the battery change hustle, ...
0
votes
1answer
28 views
Objective video quality assessment
I'm trying to develop a tool that given a video (without a reference video), it can measure the quality. Basically given some thresholds, it assigns them a rating (I just need 4 classes 1-4). Since we ...
1
vote
0answers
35 views
Sony AVC vs. MAGIX AVC vs. MainConcept MPEG-2: what's the difference?
In VEGAS Pro 16.0 I'm given (at least) three options if I want to render a 1080p 30fps video for YouTube upload:
Sony AVC/MVC, template "Internet 1920x1080-30p"
Use this setting to create the ...
0
votes
1answer
90 views
FFmpeg No such filter error
I'm trying to use FFmpeg to create a new video with some frames repeated and black frames inserted inside. Here is my command:
#! /bin/sh
fn="Drifting with Cars.mp4"
#
ffmpeg -y -i "${fn}" -ss 00:00:...
0
votes
2answers
24 views
Downsample in Youtube or in editing software?
Target platform: Youtube
Target resolution for audience: Full HD
I record 4K in order to get better image quality from smartphone (2x birate of FullHD).
Should I resample and export the project in ...
0
votes
0answers
13 views
What is meant by Average Content Distance in Videos?
I'm reading a research paper on generating/synthesizing videos:
MoCoGAN: Decomposing Motion and Content for Video Generation
To evaluate the generated videos, they have used a metric called 'Average ...
1
vote
1answer
31 views
Sharpness of Canon 80d
I am trying to figure out the sharpness while shooting video with the Canon 80d. I find that the video kind of never appears to be in focus. If I take pictures of the same things the image quality and ...
1
vote
0answers
95 views
Corrupt frames: what to do
I’ve discovered some corrupt frames in the footage I am working on (.mxf format, shot on Sony PXW 70, I only have access to the files copied to the hard drive, and the broken frames are in the ...
1
vote
0answers
30 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
vote
1answer
69 views
Video quality degrades when uploading to YouTube with variable frame rate
So I use OBS (latest ver) to record my gameplay on Windows 10.
OBS settings are:
recording format: MP4
Recording quality: indistinguishable quality, large file size
Encoder: Software (x264 low CPU ...
-1
votes
1answer
25 views
What is the good video equveilent of 1300D?
I was surfing the net and I found this answer.
Bottom line with the canon rebel series cameras is that the video is
pulled from a low resolution capture of the chip which is normally
used for ...
0
votes
0answers
18 views
correct OpenShot settings to avoid the jitters
This video with spaceship building instructions was made with OpenShot. It is jittery. It was shot with a Samsung Galaxy S9. Here are the details I dug up from the source and final video:
| Thing ...
0
votes
1answer
33 views
Video Assets to test transcode quality
I was wondering if anyone knows from where I could get a few (short) video assets in high bitrate to check the quality output of a transcoder.
Some context: A few years ago I was working on a VOD ...
3
votes
2answers
77 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 ...
2
votes
1answer
26 views
Cheap or diy lighting for video production
I am new into video production. I am a maker, I do a lot of electronic projects and write the step by step guides about it in several places of internet. From now I would like to make video about my ...
1
vote
1answer
43 views
Do video containers influence the video quality?
https://en.wikipedia.org/wiki/Comparison_of_video_container_formats
Understanding containers and codecs
I'm just confused because the information above seems to indicate containers are simply chosen ...
1
vote
1answer
176 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 ...
4
votes
2answers
42 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, ...
3
votes
1answer
42 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?
...
3
votes
3answers
70 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 ...
3
votes
1answer
58 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), ...
1
vote
1answer
17 views
How can I replicate C-LOG in a Canon DSLR?
I shoot almost all my video footage on Canon DSLRs (APS-C sensors if this makes any difference). I know that true C-LOG isn't available on DSLRs and I've seen many sites that claim to sell "C-LOG" ...
1
vote
2answers
105 views
Tips for shooting professional POV footage
I'm working on a video for a client and they are wanting to tell a story in video shot entirely in POV.
My initial thoughts were GoPro but i think it doesn't give the same quality as a DSLR. I'm ...
1
vote
1answer
134 views
FFMPEG LIBVMAF segmentation fault
I am trying to compare two videos using the libvmaf in ffmpeg 4.0. I have compiled and installed from source VMAF and FFMPEG and FFMPEG has built-in support for libvmaf. That's the ffmpeg ...
0
votes
3answers
24 views
Is it possible to make a movie with todays smart phone?
I have LGv30+ which is capable of recording video at 2k & 4k resolution and most smart phones available in market have capable of recording video in 2k resolution.
Is video shot with these ...
3
votes
2answers
270 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.
...
2
votes
1answer
536 views
What is 1200p HD?
I'm looking to purchase a borescope, and many of them state their video quality as "1200p" HD. Surprisingly, I've found nothing definitive as to what that means. The closest answer I could find was ...
-2
votes
2answers
90 views
What kind of camera do I need to record a video with the quality that is in the linked YouTube video? [closed]
Please provide camera models if possible. Not knowing this is driving me crazy haha
0
votes
1answer
29 views
If I encode a video above source and then later do a final encode, will I lose extra quality vs the final encode directly?
I am very happy with my Handbrake settings for my final encodes but I have a video that needs to be edited first. I intend to use Vegas Pro to do this but the default encoding settings create terribly ...
2
votes
1answer
203 views
Automating QC to find corrupt video files
I have a hundred of visually (!) corrupt video clips in H.264 'hiding' within a larger set of files.
As they have been re-transcoded, all of them are now technically OK and will play fine, but will ...
0
votes
1answer
91 views
How do I apply a timecode and then I speed up x4 a video with ffmpeg without losing quality?
I'm trying to create a .bat file for ffmpeg that:
Applies a timecode overlay (e.g. 00:17:23:02)
Speeds up the video x4 (but AFTER the timecode is applied)
Doesn't "touch" the quality of the original ...
1
vote
1answer
55 views
How can I export 1920X1080 to 320X240 without losing quality?
I have created a mo graph video using After Effects and Premier in HD 1920X1080. The client wants a much smaller version in 320x240 but every time I render out the smaller version pixilates.
Is ...
0
votes
2answers
1k 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, ...
0
votes
1answer
28 views
Is footage recorded through external recorder really better?
Most DSLRs offer 8-bit recording, 4:2:0 with 100mb/s 50/mb/s 500mb/s in their own containers.
Why would shooting with an external recorder (let's say ProRes HQ or 422), make the picture look better ...
2
votes
1answer
63 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 ...
1
vote
1answer
58 views
Bitrate Settings for Minimal Data-Loss
I cut clips from high-quality variable bitrate videos. What I'm wondering is if aiming for the same bitrate as the source video would result in a transparent-quality video. For example:
═════
Source ...
1
vote
0answers
88 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 ...
2
votes
1answer
186 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 ...
2
votes
1answer
647 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. ...
0
votes
0answers
52 views
Decent quality video hosting for China
For most of the world, YouTube provides decent quality video hosting, and for those who want higher quality, there is Vimeo.
Unfortunately, practically all non-Chinese video hosting services are ...
0
votes
2answers
181 views
Converting 4k to mkv
I need to send a short video clip (30 seconds) to a client of mine, the video is 3840 × 2160 resolution.
The client is using some cheap, 4k TV and he is using a USB to play the video which only ...
0
votes
1answer
32 views
Is there any use in archiving graded 8-bit footage as 10-bit file?
I've made a video that was filmed with a Canon 60D. It has been graded and edited in Davinci Resolve.
The original footage from the camera is 8-bit. But what happens in the grading process? Will I ...
1
vote
1answer
268 views
mov to mp4 conversion produces grainy results
I am using handbrake to compress 250mb of 3d animation stored in .mov. This is how the mov looks:
The compressed version has some artifacts. Like it doesn't have enough shades of grey:
How can I ...
0
votes
0answers
224 views
Check first then enforce and match various broadcaster requests with ffmpeg
This question is a spin-off of a previous one focused mostly on Premiere Pro: How match this broadcast standards with Premiere and ffmpeg
My goal in this one is learn as much as possible to handle ...
