Questions tagged [video]
Video is the technology of electronically manipulating still images that represent motion.
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Suitable codec and settings to encode videos that can be scrubbed back and forth for making transcripts
For scientific purpose, I'm encoding videos that are going to be transcripted. Since in the process of transcription the person who does the transcription needs constantly to jump back and forth in ...
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How to cut video, add audio and burn subtitle while cropping video all in one command - ffmpeg
Currently I have the following command,
which cuts the video, adds audio and burns subtitle into the video.
-ss 00:00:30 -t -i video.mp4 -i audio.wav -vcodec copy -acodec copy -map 0:0 -map 1:0 -vf ...
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ffmpeg command to convert interlaced video to progressive without any loss of quality
Can anyone provide me with the ffmpeg code to convert deinterlaced 80's video to progressive video without any loss of quality - ideally where I could deinterlace only the interlaced fields(I use ...
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Gray screen issue after recovered video with ffmpeg
After recovered ".mp4" videos from mobile phone, some videos were corrupt. I used the FFMPEG method to fix the videos. Some CMD commands below;
First Code: recover_mp4.exe good.mp4 --analyze
...
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How to adjust video histogram using ffmpeg?
I have a dark video and'd like to adjust its histogram. In a graphical editor I've found the values of the color levels that enhance video contrast.
How to set this level values in ffmpeg?
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FFMPEG hardware accelerated 10 bit downsampling to H264
I have a home setup where I use a Kubuntu 22 box as my home theater PC (HTPC) to play videos/movies/music in my living room. I also set up a raspberry Pi in the kitchen that receives a video stream (...
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ffmpeg: Adding longer audio to shorter video, with video synced to end of audio
My audio file is longer than the video. I want to merge the two, but I want both audio and video to end at the same time, leaving black frames at the beginning of the video as the audio plays. How can ...
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How to prevent iMovie from changing aspect ratio on a video short in portrait mode?
I shot a video in portrait mode on iphone, and its a mov file with a vertical aspect ratio (ie, when i open it in quicktime, it has no black areas on its sides).
I open that video in imovie version 10....
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Where to find this template for Premiere Pro or After Effects?
Hello,
I was wondering where can I find this kind of template online. I tried various websites but there is just dust without these geometrical shapes.
The closest I could find is on Envato Elements ...
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FFMPEG Seeking with concat demuxer out of sync
I have a very simple use case that's driving me bananas.
My problem and question:
I'm using ffmpeg version 5.1.2 on a MacOS and i'm using ffmpeg seeking and concat demuxer to cut many 1 minute videos ...
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I have an audio file that's supposed to be video
So, I have an audio file that's a video but unencoded and as an audio file. I recorded it in Audacity, and I need to view it as a video. Any ideas?
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after merging videos together, unable to apply sticker at the same position on video as show in video preview .. how to do it using ffmpeg
The issue is that when we merge two or more videos then we have to make their scale same to achieve it,because of which the video resolution get change. After that when trying to apply overlay on that ...
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why iMovie drops FPS when adding audio during export
I have a video file with 60FPS. When I add it to iMovie v 10.3.5 I can click share > file and I have option for example 1080p60 but as soon as I add audio track, I can no longer export it as 60FPS. ...
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Looping segments breaks some players
I used ffmpeg to generate some segment files that I'm using as slate to play before a program starts. Using nodejs, I'm generating a an m3u8 file that loops perfectly in HLS.js, but on some players (...
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why does video need to be in video container files? and why do those file need to be in multimedia container files?
this might be a tough question but i feel the need to ask
why does video need to be in video container files? and why do those file need to be in multimedia container files?
when people where first ...
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what is the difference between a video compressor and an video encoder?
quick question,
i am curious to know what is the difference between a video compressor and a video encoder? are they the same thing? if not, what differences are there?
what are the fundamental ...
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How can I crop four videos into an unusual aspect ratio, and then stack them all on top of each other?
This seems like it would have a solution but I haven't had luck online. I am working on a video project that involves taking subtitles for four videos and then stacking them on top of each other. In ...
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Deciding on backdrop for making YouTube videos
I am new to recording videos. My room is cluttery and I want to hide all that clutter under a backdrop. I have watched some videos on YouTube but I am still not sure of what I need. From the videos I ...
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Vignetting with Sirui Anamorphic Lens on a Sony A7sii
I just purchased a Sirui 50mm 1.8 anamorphic lens, the Sony E-mount version. It fits on the camera fine as expected. However, there is a lot of vignetting. It happens on both 4k and HD recording modes....
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2 camera stitching with 3m distance
So, at this point, I'm not sure if this is a programming or a physics problem! I'm attempting to concatinate 2 video inputs together to cover a wider field of view. As far as I can tell, this is ...
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FFMPEG : Add video (partial video effect) under the image with ffmpeg
I have a video, video.mp4, and an image, artwork.png
I would like, to use FFmpeg:
To display the video.mp4 effect inside the image artwork.png
If possible, resize output.mp4 as per the demo ...
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268
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ffmpeg error with device when transcoding from HEVC to H.264 on GPU using NVENC and CUDA
I wanted to transcode my videos that have hevc encoding into h.264 using ffmpeg with Nvidia CUDA acceleration.
Basically I've followed the guide provided in the official documentation and read through ...
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ffmpeg demuxer file size
I have used ffmpeg to concatenate two MKV containers with both files having AV1 codec like so:
ffmpeg -f concat -i input.txt -c copy "out.mkv"
Interestingly enough, the first file has ...
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120
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MPEG-TS imprecise cut position on exact PTS, if cutting audio as well
Good morning, after 1 month of research and attempts, still wondering the correct solution.
I have frequently tv mpeg-ts (h264+aac) file to cut part from. I have a script to cut at exact times ...
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Interlaced or progressive for YouTube? [closed]
For shooting a YouTube videos as a talking head I'm choosing a camera.
The shooting will be indoors. Everything will be calm, no fast movements.
That is talking and occasionally to write something on ...
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How can people apparently manage to capture video in such poor quality in 2022? [closed]
This is something which has baffled me for many years already. I just watched this freshly uploaded video (out of many):
It seriously looks like somebody took a ...
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9
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Davinci Resolve drastically changes clip
I'm having a vexing problem with importing a video clip into Davinci Resolve.
I recently downloaded a replay saved by Nvidea shadowplay from Google drive.
However, when I put the same clip into ...
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Video playback of unique parts of the same video across multiple screens
I need to produce a video that is played back across 5 screens. However it isn't the same image on each screen.
The idea is that the image switches from one screen to the next at certain specific ...
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How do you convert a folder of .wav audio into .mp4 video with a .png image file using ffmpeg in the command prompt?
I have tried to do
ffmpeg for i in *.wav; do ffmpeg -loop 1 -i image.png -i "$i" "${i%.*}.mp4" -c:v libx264 -c:a aac -b:a 192k -shortest %04d.mp4
but it doesn't work and I am ...
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How to identify video frames that contain a pattern in a certain location?
The pattern is not a logo or anything like that. It is an imperfection in the video. It was a home movie that I had transferred to an mpeg file on a dvd. The film is old and so there is an ...
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Is it doable to use a text file with a list of files as input when concatenating and reencoding with ffmpeg and -filter_complex?
When trying to concatenate mp4 files with the following script
#!/usr/bin/bash
echo "The number of files to be concatenated?"
read no
ffmpeg -loglevel warning -hide_banner -i ...
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How to make lights flash like in stranger things
So i have this scene where there's a lot of on tube lights and i wanna dim some of them and turn them back on (replicating the flashing effect in stranger things) so does anyone have an app that can ...
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Intra-refresh mode in x264 encoder causes browser's player freeze
I'm building low delay live streaming with use webrtc. My server application use gstreamer and UDP as transport. It works fine except that lost UDP packets leads to too long drops. To improve user ...
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Why is FFmpeg adding a minute to videos created with an audio source & image source?
I've been using FFmpeg to combine an audio file (.wav) and an image (.jpg) into a video (.mp4), the command I looked up seemed to work when testing it, so I tweaked it a bit (mostly just adding the ...
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Is the EF mount on the BMPCC 6k weak? If yes, how weak?
BACKGROUND / PROBLEM
Hi, I plan on getting a Blackmagic Pocket Cinema Camera 6k g2 sometime soon, and don't know the physical limits of what the body of it can withstand. I've heard that EF lens ...
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How to clip an image/layer like photoshop to an animation that has a transparent background in Premier pro?
Good day! I'm new to premiere pro, and here is my issue. I have an animation/sequence I'm currently compositing in premiere pro that has a transparent background and I forgot to add shadows on it, ...
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What do we call a video where there are multiple adjacent photos (on 1 slide) and the view moves from left to right. How does one create such video?
An example of such video is:
In the above video, we can see that the video starts with 3 photos (that fit onto the screen) and as the video progresses, more photos just ...
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How do I add (layer) a .wav audio file to a ProRes 422 HQ .mxf video without re-encoding?
Here's the detailed info of the .mxf video
General
Complete name : D:\R-2180634-1250074380.jpeg-gigapixel-low_res-scale-2_00x.mxf
Format : ...
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ffmpeg drawtext + colorspectrum - background partly transparent only
I am currently working with the drawtext/alphamerge filters to have the text coloured with colorspectrum on a transparent background. While I have been trying many options, the closest I managed to ...
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Issues in trimming a video with FFmpeg
I have a .webm video captured through a web browser. Using ffmpeg, I want to trim it into its first 30s without re-encoding and quality degradation. But I have issues doing it and ffmpeg complains ...
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Trapcode Particular - Choppy Streaklet
I'm trying to recreate the hurricane that you see faded in this screenshot, speed and shape are in a good place but the problem is the streaklets aren't visible, it looks like the start of the ...
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Camera recorded audio and recorder audio differ in time
I have a Fuji X20 and recorded a video with it. The recorded MOV file contains a video stream of type H264 - MPEG4 ACV (part 10) and an audio stream with these parameters (VLC player)
Codec: sowt
...
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Creating a 0x0 webm file
Currently, I am trying to create a video that changes size using the ffmpeg concat function. However, I want to make the video hide, and the only way to do that is to make it a line. But, I want to ...
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How to extract part of a video with subtitles included?
How to extract part of a video with subtitles included? I have a video (in .mkv format if it matters) and its subtitles of multiple languages (usually embedded in the file as selectable subtitles (but ...
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"Non-monotonous DTS in output stream 0:0 This may result in incorrect timestamps in the output file." error
Adding all mp4 file in the directory with FFMPEG .
my usual command:
ffmpeg -f concat -safe 0 -i <(for f in ./*.mp4; do echo "file '$PWD/$f'"; done) -c copy output.mp4
This shows below ...
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Putting a png background on h264 encoded mp4 video using ffmpeg
I would like to put a png file as a background to an h264 encoded mp4 video. I am just trying to replace the video's white background with a specific png background. They are both of the same size.
...
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FFMPEG Highest quality without highering bitrate
I need the highest possible quality without needing to raise the bitrate or changing the codec (h264).
I came up with this command
ffmpeg -c:v h264_cuvid -i input.mp4 -preset placebo -b:v 1400k -b:a ...
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Nikon D3500 damage while recording video
I read on a another photography site that the Nikon D3500 can overheat and suffer permanent damage while recording video. Does anyone know if there is any truth to this? It seems implausible that ...
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140
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FFmpeg saturates memory + CPU usage drops to 0% during very basic conversion of PNG files to MP4 video
I have this Python function that runs ffmpeg with minimal options from the Windows command line:
def run_ffmpeg(frames_path, ffmpeg_path=notebook_directory):
'''
This function runs ffmpeg.exe ...
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1
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175
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Cryptic FFmpeg + Python error: "Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_crop_1"
I want to use ffmpeg with Python in a Jupyter notebook to create a video from 2000 PNG image files generated by matplotlib. I'm on a Windows 7 machine.
The frames are very narrow and high, so I'd like ...