Questions tagged [video-encoding]
Specific issues with encoding video to a certain format, also related to [video-conversion]
369
questions
-6
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0
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54
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GoPro Video. Did someone hack my computer? Did someone edit and put extra voices to my GoPro video between recording it and uploading to Google Drive? [closed]
I have a suspicion that someone edited my old GoPro video and added sounds that don't belong in the video.
Is there any way to find out if sounds were added to the video at some point after I recorded ...
0
votes
0
answers
59
views
OBS, other encoder than FFmpeg VAAPI H.264 and x264?
Linux + Intel HD 620. I can see only two options. If what I read on the web is correct, the GPU is capable of encoding H265 or VP9. Why can't I encode in those formats? Is this because OBS does not ...
- 3,550
1
vote
0
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27
views
Why does my SVT-HEVC-encoded video run out of sync?
I'm trying to transcode a video (with audio) to HEVC using Intel's SVT-HEVC encoder. The video's audio tracks are in sync before transcoding.
Both ffprobe and mediainfo agree that the input video is ...
- 379
0
votes
0
answers
28
views
FFprobe not showing frame's data
As a beginner I don't know much about ffprobe and other video editing command line tools. Please guide me here.
I am trying to download a video with yt-dlp and trim it to the nearest key-frame of my ...
- 21
1
vote
0
answers
76
views
Why does the video file (x264) made with ffmpeg have a much higher bitrate compared to when I reencode it using the same settings in Handbrake?
I'm a ffmpeg beginner and am converting a series of .png images taken every 10s into a timelapse video. The images are named pic1.png, pic2.png, etc.
For this I'm using the following ffmpeg command:
...
- 11
0
votes
0
answers
38
views
Remove Audio 'Source duration' & 'Source stream size' from x264 mp4 encodes
I use ffmpeg to encode videos and I am looking to remove all the unnecessary metadata. I use a simple ffmpeg command to encode the videos, something similar to:
ffmpeg -i title.mkv -c:v libx264 -b:v ...
- 87
0
votes
1
answer
115
views
ffmpeg - How to create a video with a PNG file and keep the same colors
I use a PNG file to create a video.
I create the PNG file with Inkscape.
The SVG file in Inkscape, the PNG file opened in Chrome show the same colors.
Nevertheless the colors of the video (opened in ...
- 101
0
votes
2
answers
55
views
What does this stat mean in YouTube Stats for Nerds? [closed]
Under the field Current/Optimal Res, the resolution is followed by an '@' symbol followed by a number. I have tried to find out what this number represents but could not find any source. I am guessing ...
1
vote
0
answers
77
views
FFMPEG - process interlaced frames in mixed footage separately
I have a video file - an NTSC DVD rip. I want to convert it into PAL. The problem with that NTSC DVD is that it's a mixture of 23.976 fps telecined content and true 29.97 fps interlaced content.
I ...
- 11
0
votes
0
answers
90
views
How to consider crf, -maxrate and -bufsize of a lossless video for whatsapp status
I am using ffmpeg to encode my videos to upload them on Whatsapp status. This videos are <30 sec duration, and the output size should be in 10-14mb range.
Suppose I have a video of size 50 MB with ...
1
vote
0
answers
58
views
ffmpeg last frame freezes, audio keeps playing
I'm using fffmpeg to cut an H.264 video into specific shots. I need it to be frame accurate, which isnt a problem if I only encode video (now that I know how to calculate the ms from the number of ...
- 11
1
vote
1
answer
600
views
errors in encoding avc x264 to av1 using latest ffmpeg libaom linux
I have a system with Intel i3 10th generation processor and Asus H510 me motherboard. I have installed Arch Linux x86_64 latest version and after that I have installed aom package from official ...
1
vote
1
answer
48
views
FFmpeg does not copy over chapter atoms when I try to remove subtitles
I have some videos encoded from The Criterion Collection, and their videos use these things called "chapter atoms". What is really odd is that ffprobe does not detect these. I assume that ...
- 11
1
vote
1
answer
283
views
Why is the scale filter ignoring the out_color_matrix option?
I'm testing on an input that has none of its colour metadata set:
ffprobe -v error -show_streams "input.mp4" | grep color
color_range=unknown
color_space=unknown
color_transfer=unknown
...
- 11.6k
1
vote
2
answers
720
views
Why does hardware encoding in FFMPEG result in lower quality when using CRF, which is supposed to be quality-based?
I've recently been encoding videos using FFMPEG through the Shutter Encoder GUI. I've been using CRF as a quality indicator, since I don't care about filesize as long as it is encoded as efficiently ...
- 123
0
votes
0
answers
89
views
Which options are incompatible with CRF, CQP?
What settings should not be used when using CQP, CRF modes. I read that 2pass mode is not compatible with constant quantization modes. It is also recommended to disable adaptive quantization. Maybe ...
- 1
0
votes
0
answers
65
views
Is there any ffmpeg or Avidemux filter to remove this kind of glitch?
I record gameplays with ffmpeg, and with this specific game I get this kind of graphical glitch (most graphical elements are fine but text labels disappear for just one frame). It happens randomly ...
- 1,486
0
votes
0
answers
45
views
Is there a video container format (mainstream or experimental) that can properly transmit Black Mirror's Bandersnatch?
Black Mirror's Bandersnatch
From Wikipedia:
Black Mirror: Bandersnatch is a 2018 interactive film in the science fiction anthology series Black Mirror. It was written by series creator Charlie ...
- 725
0
votes
0
answers
130
views
How to achieve the following stream information using FFMPEG parameters?
Duration: 00:52:37.26, start: 0.000000, bitrate: 1329 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 1210 kb/s, 24 fps, 24 tbr,...
0
votes
0
answers
19
views
Get exact timestamp of keyframe with ffmpeg (for making a precise cut) [duplicate]
I am trying to split a video in two at a precise point programmatically. This needs to be efficient in my use case, so simply re-encoding the entire video is not an option. The issue is the input ...
- 1,819
0
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0
answers
140
views
Live video in facebook is lagging while using ffmpeg from video link
Livevideo in facebook is working fine for local device video(case 1) but its having lagging issue from video link(case 2) using FFMPEG.
Please find command for the same and log.
Case 1 - Command : ...
0
votes
0
answers
120
views
Which properties have to match to use the concat remuxer in ffmpeg?
I am trying to generate a video to be concated into another video via the ffmpeg concat remuxer. The remux process needs to be extremely efficient for my purposes so I am trying to generate the video ...
- 1,819
0
votes
0
answers
197
views
ffmpeg on RPi latest version fails (7:4.3.4-0+deb11u1+rpt3): B-frames: Invalid argument
I'm using ffmpeg on a Raspberry Pi (3 and 4) w/ hw acceleration (h264_v4l2m2m codec) to encode a time-lapse MP4 from a series of stills. The current ffmpeg release (7:4.3.4-0+deb11u1+rpt3) produces a ...
0
votes
1
answer
95
views
Looking to compress just a PGS stream of a video
I have a video stored as an mkv with pgs subtitles. I noticed when I burn the subtitles in with this command hereffmpeg -i "movie.mkv" -filter_complex [0:v][vid];[0:s:1][sub];[vid][sub]...
0
votes
1
answer
607
views
How to concatenate videos with different bitrates using ffmpeg
I want to concatenate two files having the following outputs from ffmpeg :
file1:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file1.mp4':
Metadata:
major_brand : isom
minor_version : 512
...
1
vote
1
answer
4k
views
How to compress a video to VVC(h266) or Versatile video Coding
I have a h264 video. I want to compress it to Versatile Video Coding(h266) by using ffmpeg. Can anyone tell me how to do it by using ffmpeg or any other way.
- 11
0
votes
1
answer
196
views
Trim .tp files without re-encoding
I'm currently using ffmpeg -ss xx:xx -to yy:yy -i input -c copy output to cut some files and it works fine with .ts and .mp4, but it can't handle .tp files. Here's what I get:
[mpegts @ 0x198acd0] PES ...
- 11
0
votes
2
answers
996
views
Convert 10bit HDR video to 8bit frames
I want to convert a yuv420p10le video into .png frames at 8bit (0,255) without washing away the colours. How can I do that?
The usual command I use is:
ffmpeg -i input.mp4 '%05d.png'
However this ...
- 1
0
votes
0
answers
87
views
ffmpeg dont stop output on input finish
I need help with behavior that is incomprehensible to me.
Ubuntu 20 system, compiled ffmpeg by Nvidia's GIT for CUDA support.
At the start of the conversion ffmpeg continues to write output ...
1
vote
0
answers
285
views
What variant of Spline algorithm is used in "spline" parameter from "scale" filter?
FFmpeg has two filters to scale the video: scale and zscale - zscale has spline16 and spline36 parameters (they represent Spline16 and Spline36 variants of the algorithm), scale has spline parameter.
...
- 303
17
votes
6
answers
10k
views
ffmpeg: limiting to single CPU core when encoding h264
I need to reduce the framerate of some H.264 videos in the background without maxing out my CPU (on Linux). Somehow -threads 1 has no effect at all:
ffmpeg -threads 1 -i 50fps.mp4 -filter:v fps=30 ...
- 433
1
vote
1
answer
941
views
Ffmpeg producing worse result than Handbrake using x265 with identical settings
I'm trying to replicate Handbrake settings with ffmpeg, because I'd like to add some metadata and some other things with ffmpeg that Handbrake can not do.
What I've done seems to be close, the ...
- 75
0
votes
1
answer
170
views
how to combine two ffmpeg commands into one?
I am currently using this command to cut the first 10 seconds of all videos in a folder so the output is the whole video minus first 10 seconds.
FORFILES /M "*.mkv" /c "cmd /c ffmpeg -...
- 1
1
vote
0
answers
770
views
ffmpeg Combine 2 video files into one with two audio tracks (different languages)
I have multiple pairs of video files (.mp4) that are basically the same video but in different languages (original english and synchronised german in my case). I know that with ffmpeg I can take ...
- 1,849
1
vote
1
answer
2k
views
ffmpeg overlay image on video & trying to keep the original video quality
I'm adding overlay images to a video. and I'm trying to make the output very similar to the original video in order to get the best quality for example if the original video (like the one in the ...
- 27
0
votes
1
answer
37
views
Does H.265/HEVC macroblock/CTU algorithm compensate for 4:3 letterbox in 1920x1080
Have some source in 1920x1080 but it's actually 4:3 with letterbox. One path is to crop the video to remove the black letterbox and bring it down to 1440x1080 but is that really necessary when encoded ...
- 3,361
1
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0
answers
220
views
Cannot start livestream on youtube even though ffmpeg seems to work?
I am a novice on ffpmeg and trying to go for a livestream youtube radio via azuracast. I have created an instance on oracle cloud and installed azuracast there. I can listen to the songs I uploaded in ...
- 111
1
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0
answers
58
views
Having audio and playback issues when attempting to capture DVCPro50 tapes over Firewire with FFmpeg
I've been trying to capture DVCPro50 tapes that were recorded at 23.976 fps over Firewire and I'm unable to come up with a command to get the file to play back properly. I can get a file with audio at ...
- 11
0
votes
1
answer
917
views
what's the difference between SAR & PAR in video (Detailed Info)
i want to know what's the big difference between the SAR and PAR, also how ffmpeg automatically deciding the DAR value with the SAR and video width & height.
why the SAR value is so important for ...
- 1
0
votes
0
answers
213
views
FFMPEG failing to render PNGs as ProRes 4444
I have a series of PNGs with transparent background that I would like to render as a video with an alpha channel. I tried running the following ffmpeg command:
ffmpeg -y -r 60 -i frames/%04d.png -c:v ...
- 113
1
vote
0
answers
527
views
FFMPEG How to do segments encoding in MXF XDCAM HD422
I'm trying to encode a feed from a Decklink card to MXF XDCAM HD422 by segment, so I use the following command line:
ffmpeg.exe -f dshow -video_size 1920x1080 -r 25 -pixel_format uyvy422 -rtbufsize ...
- 51
1
vote
0
answers
177
views
How to hard code / embed subtitles of videos inside a folder with FFMPEG
Lets say I have folder A with lots of videos that have TX3G subtitles
Some videos don't have any subtitles
So I need a windows command to process all videos inside this folder and embed / hard code ...
- 683
0
votes
0
answers
726
views
What is the suitable H/W compatibility for av-1 encoding
Some videos are transcoded, h264 on ARM machine, h265 on Intel Skylake and av-1 on Intel RocketLake. File savings are better with av1 at the same quality but still at a high computational cost.
Avg ...
- 19
1
vote
0
answers
201
views
How to convert .DXA file with ffmpeg
I have .dxa video footage that I'd like to convert to a more standard format with ffmpeg. By doing research I found some people reccomend converting to .yuv first, then convert from .yuv to .mp4. (...
- 13
0
votes
0
answers
92
views
Handbrake videos displayed letterboxed, how to avoid?
I have encoded a DVD with HandBrake as mkv with one of the GENERAL (720p) presets. When I play this on my SONY TV (with the TV's function to play video files) it is shown letterboxed (black bar on top/...
- 1,887
0
votes
0
answers
101
views
audio and video not correctly sync after concatenation
totally new to video editing in general and in need of some help =)
command that I'm using (windows batch):
(echo file cucca.jpg.mp4 & echo file cucca.fade.mp4 & echo file cucca.jpg.mp4)>...
- 101
1
vote
0
answers
2k
views
Using FFPMEG, create a MJPEG stream from a file to simulate a webcam
I'd like to use ffmpeg to simulate a network webcam.
These usually give out an MJPEG feed that plays in a browser.
I want to create a stream like this locally as a test case
for a software I plan to ...
- 423
0
votes
2
answers
67
views
Are watermarks constrained by the quality of the underlay video?
This may be a stupid question but I have to clarify it for my own peace of mind, so bear with. The good news is it's more or less a yes/no question for the FFmpeg/AV experts who know the answer.
Say I ...
- 11.6k
0
votes
0
answers
676
views
H265 10 bit to H264 8 bit through NVENC looks terrible
I'm currently using FFMPEG run with Sickbeard Mp4 Automator to convert H265 video to H264 since my phone chugs hard playing H265 10 bitvideo. I set it to use NVENC and it's unnoticeable for brighter ...
-1
votes
1
answer
679
views
Why on youtube a 1080p video looks better than 720p ? (My screen max resolution is 720p)
A resolution greater than 720p looks better on my 720p screen . I want a clear and basic answere to understand this.
- 23