Questions tagged [video-quality]
The video-quality tag has no usage guidance.
0
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0answers
8 views
getting blurred video after encoding with ffmpeg
I am encoding a lot of videos later I am storing these videos. I am playing these through a browser. I have observed the blurred video while playing the recorded video file only at the very starting, ...
0
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0answers
9 views
Why my video on Youtube is better on 360p against 720p?
I've upload a new video on Youtube and this time my video looks bad in all quality (except 360p and 1080p)
Anyone have already got this problem ?
I've uploaded lot of video on my Youtube Channel ...
1
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1answer
31 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 ...
0
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0answers
24 views
VOB to MP4 Lossless
I am trying to convert a large quantity of VOB files to MP4 with as little quality loss as possible. Everything I try is reducing the bitrate down to 1024k, which results in a reduced quality. Is ...
0
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0answers
14 views
Quality improvements on frames captured from videos
I'm trying to capture frames from a video, and use them as photos in a machine learning -based process for some detection. Unfortunately, the frames captured from videos are usually very blurry, shaky,...
1
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1answer
47 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
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2answers
39 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
26 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?
...
2
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2answers
39 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 ...
2
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1answer
38 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
15 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" ...
0
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0answers
13 views
Software that makes us look better on video streaming?
I tried hard but I did not find any software for video that would make my skin look smoother. There are a lot of opitions for pictures but not for video.
Something like automatic makeup and so on ?
1
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2answers
41 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 ...
0
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0answers
8 views
Same video renders well in YouTube but terrible on LinkedIn
The first image below is a screenshot of a video viewed on YouTube. The second image is the same video viewed on LinkedIn. Both were viewed in Chrome (Version 67.0.3396.87). Can anyone tell me why the ...
1
vote
1answer
79 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
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3answers
23 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
127 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
71 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 ...
0
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0answers
39 views
Huge quality difference between premiere and youtube
I want to create a short video for me and some friends so I want to upload it on youtube to share it.
I started to edit with Sony Vegas Pro. The quality was fine on my computer but it was not good at ...
-2
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2answers
83 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
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1answer
25 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
80 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
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1answer
66 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
37 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
490 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
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0answers
40 views
24fps looks terrible and jerky
No matter what I do, my footage shot at 24fps looks terrible; it's jerky and stuttery. Switching up to 50-60 fps smooths things out, but the "film look" isn't there.
If I shoot at 24fps and render at ...
0
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0answers
23 views
Recompressing H.264 footage without lossing quality
I often use NVIDIA Shadowplay to record, and the footage is often always very inefficiently compressed, being about 40Mbps and 5 minutes long, when in reality I only need it to be 1 minute and I ...
0
votes
1answer
26 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
35 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
49 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 ...
0
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0answers
102 views
Why do iPhone videos look choppy after transferring to Mac?
I've been having a consistent issue with video quality of videos when they are transferred from my iPhone to my macOS computer.**
In particular, when I watch these sorts of videos on my Mac (using ...
1
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0answers
73 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 ...
0
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0answers
165 views
premiere low quality after import
the second i import my video into premiere it go potato quality and i dont know what settings to put it on to make it not do this, and yes i have tried letting premiere adjust the settings ...
0
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0answers
127 views
HLS Video encoded at Amazon Elastic Transcoder remains on lower quality
I am having troubles with HLS videos encoded at Amazon Elastic Transcoder using their own builtin HLS presets. I have a 1080p source file that I have uploaded.
When playing back, the video won't ...
2
votes
1answer
68 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 ...
0
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0answers
239 views
ffmpeg/libvpx - archiving DVDs in VP9 results in 'blocky' output
As the title says, I'm trying to archive my DVD collection into VP9 using ffmpeg. However, the output has some noticeably 'blocky' distortion. It tends to be worse on black backgrounds or when ...
1
vote
1answer
344 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
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0answers
42 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
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2answers
117 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
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1answer
31 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
155 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
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0answers
35 views
Choosing overhead lights for a garage studio.
I am building up a garage video studio and have a c stand setup with an overhead camera (Canon 5d Mark II with EF 100mm f/2.8L Macro IS) somewhat similar to the setup here.
I’ve been researching ...
0
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0answers
152 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 ...
1
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0answers
300 views
Change resolution according to bandwidth at the start of the video
The use case described here is very much the same as the YouTube's feature where a lower resolution of the video is selected if the user's network speed is low. But, I'd like to do this only at the ...
1
vote
0answers
64 views
How can I remove a spotlight effect from a MP4 captured from Youtube?
I want to fix a youtube video by capturing it an removing the spotlight effect. its a bright spot in the middle of the frame. I captured it as an MP4. How can I fix it?
1
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2answers
409 views
Improving speed for aerender.exe (Adobe After effects CC 2017)
I'm working on a project that should render as many videos as possible.
Only 3 images in the project change after every render.
The output length is 12 seconds and it takes about 90 seconds to render ...
1
vote
2answers
1k views
Does transcoding always mean quality loss?
Can I transcode video from h.265 to h.264 without loosing quality?
My instinct is that it should be fine, that with approximate quality settings the new files will be the same quality but larger file ...
5
votes
4answers
268 views
Video format with dynamic resolution
Are there any video formats that change resolution per frame and with different resolutions at different parts of the screen?
All videos I know today they have fixed resolution.
For video blogs I ...
0
votes
1answer
226 views
Why Camtasia always produce video with a low quality, even if I record in 1280p, for example?
I spent some time learning this tool, but I'm disappointed because I cannot produce video enough quality. Look for that, firt I have a screen snippet of the video still inside the Canvas on Camtasia, ...
0
votes
1answer
223 views
Quality of time lapse from images
I'm planning on creating a time lapse from a series of still images. I plan to shoot the images in raw (Nikon NEF, Adobe RGB), then edit with Photoshop and export as jpegs (highest quality). I am ...
