Questions tagged [video]
Questions about video editing, streaming, conversion, capturing or video output. Use a more specific tag if possible.
6,229
questions
-1
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How to mute audio by looping the last second of every x seconds in the video?
UPDATE:
Баяр Гончикжапов and inspired by this post, tried:
ffmpeg -i input.mp4 -af "volume=volume=0:enable ='gte(mod(t\,20)\,15)'" -c:v copy -c:a aac -b:a 192K output.mp4
Post solved, thank ...
- 19
0
votes
0
answers
472
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FFMpeg Concat error: [mxf @xxx] index entry xxx+ TemporalOffset 1 = xxx, which is out of bounds
Use FFmpeg to concatenate broadcast files about 50 times a day.
Files are transcoded to XDCAMHD prior to being concatenated. This error occurs on 15% of all concats even if there is only 1 source file....
- 91
-1
votes
1
answer
67
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Creating 8K HDR Stillframe AV1 videos?
I would like to create 8k/4k (DCI/UHD) videos out of mp3 audio tracks. The whole video would be a single image, but I'd like the image to be UltraHDR and the end output video to have HDR metadata.
I ...
- 356
1
vote
1
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142
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FFMPEG - How to Merge Three Files - Only Middle One Has Audio
I have three videos that I want to merge into single one.
Intro video (mp4) - 3 seconds - No Audio
Main video (mp4) - 1 minute - With Audio
End video (mp4) - 3 seconds - No Audio
When I use ffmpeg, ...
- 1,708
-2
votes
1
answer
101
views
Video to geotagged images using powershell
I have an MP4 from a GoPro with a gpstrack included. Now I am trying to extract a geotagged image sequence from that video.
For that I am currently using FFmpeg and exiftool; I'm open to better ...
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6
votes
0
answers
216
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How to correct Hindi text rendering when using FFmpeg?
I have a FFmpeg script to add some Hindi text to the MP4 video file.
The FFmpeg command looks like this
ffmpeg -i template_video.mp4 -filter_complex "drawtext=text='नमस्कार जी मैं हूँ':fontfile=...
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0
votes
1
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98
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How to speedup video with FFmpeg based on timestamps from CSV?
There are already questions with regard to speeding up a video with FFmpeg, like this one.
My question is: Is there also a way to specify multiple sections which shall be speedup via an external CSV.
...
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0
votes
1
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106
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Why does a USB-C connected monitor goes blank when an embedded HTML browser video starts playing?
I have a Latitude 7490 i7-8650U 32GB RAM Windows 10 system with 2 external HP 24es monitors.
The graphic card is Intel UHD Graphics 620. My resolution is set to 1920x1080.
I am using a dual HDMI to ...
- 141
0
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0
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46
views
Why can my device through PLEX only play one of these two 4K files?
I have two 4K .mkvs consisting of both video and audio tracks - my device seems to be able to play 4K content just fine for a movie, but won't playback upscaled 120 fps content. Both videos are x265 ...
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0
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0
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57
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How to automatically convert zoompan filter's private fps to input video's fps?
I have a 24 fps video, I'm trying to use the zoompan filter in my video and I'm having trouble setting the filter's private fps. If you set the fps in the zoompan filter to fps=30, the video and audio ...
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0
votes
1
answer
148
views
Complex ffmpeg multi-encode/streamcopy/muxing scenario: is this actually doable?
I'm trying to do multiple muxing/re-encode/copy operations on an input video with ffmpeg and have run into roadblocks with the methods I've tried; before I continue testing, I want to confirm whether ...
- 3
0
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0
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176
views
Extract frame from .hevc video with ffmpeg
I use the following command to create a snapshot 10 hours into a video:
ffmpeg -y -ss 36000.0 -i INPUT -frames:v 1 -q:v 1 output.png
But I'm running into an issue where this command doesn't work with ....
- 23
0
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0
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117
views
FFmpeg batch compressing mp4s and changing them to gifs
I want to take a folder of mp4s and with ffmpeg compress them and turn them into gifs.
I do this for each file using this code:
ffmpeg -i input.mp4 -c:v libx264 -tune zerolatency -preset ultrafast -...
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0
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166
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How can make Drawtext Slide Animation on ffmpeg - Left top corner to Right bottom corner of video
I have found the command for overlaying the text "HelloWorld" right bottom to left top. but its not accurately working on edge to edge , instead its starting above the bottom edge and ends ...
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0
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0
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50
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Trying to invoke play on DLNA-device with streaming from Synology NAS
I am trying out the DLNA protocol for the purpose of invoking media on my LG TV, where the media is stored on a Synology NAS (hosted with Media Server) on the same network.
I have successfully found ...
- 209
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0
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32
views
Dynamic Location Offsetting while Desktop Video Capture in FFPMEG
is there a way to dynamically change offsets during screen capture ?
but this offset values are static (eg. 66 and 77) and we cannot change these values during video recording. simply I am trying to ...
- 101
1
vote
1
answer
374
views
How to fix ffmpeg concatenated video playback issue?
I want to put watermarks in my video (in Specific time). I researched some sources, and it said I need to (video filter) reencode the whole video to put a watermark, but I don't have a high-end PC to ...
- 23
0
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0
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402
views
How to extract keyframe timestamps from video using ffmpeg
I want to extract the timestamps of keyframes from a video using ffmpeg. I found this thread that explains pretty much how to do it.
However, it appears that my video does not have the pkt_pts_time ...
- 101
0
votes
0
answers
42
views
Physical camera as virtual camera to stream a prerecorded video
I have a cam with a SD card (AKASO EK7000) and my goal is to stream a prerecorded video, stored in the SD card, so that, when I select the cam, I can see that video. So it's like the physical cam ...
0
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1
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321
views
How to change the sample rate of audio for all video files in a directory?
I performed screen records using wf-recorder and I realized that it was hardcoded to encode at 44.1 kHz, but Pipewire defaults to 48 kHz. So it turned out the audio would be perfectly in sync if I ...
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1
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1
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305
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Using ffprobe to get count of audio streams in mp4 file
I am looking for a way to get a count of the number of audio streams in mp4 files. Among some big long threads (mostly pre-2019 dated) on using ffprobe for this I found the following command:
ffprobe ...
2
votes
0
answers
180
views
What file properties affect the size of a video file?
This question is related to one I just posted on Stack Overflow about the meaning of the Windows shell file property "Video compression".
For a set of 71 video files, I'm looking at their ...
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49
views
How to compute the total output duration after applying Xfade in FFmpeg?
I'm trying to understand how to get the expected total duration after applying Xfade.
The answer here says:
Simple illustration: each input is 3 seconds long and the fade
transition is 1 second long ...
- 413
0
votes
1
answer
54
views
How to extract parts of the international conference video based on spoken language using command line
I have an international conference video which contains two spoken languages, i.e. the video is mixed with sentences of English and Chinese. I would like to remove the Chinese part by command line.
...
0
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1
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314
views
How to choose correct color space and transfer function with ffplay
I need to play a video using ffplay that was recorded with GeForce Experience screen recorder, but the rendered video has incorrect colors. It works correctly if I play it with VLC player, but I need ...
- 115
0
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0
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190
views
FFmpeg: Adding a new audio into video and adjust volume of both audio
I'm trying to add a new audio file to the existing audio track in my video.
1. If the video is longer, I want the newly added audio to repeat throughout the entire video, but if the video is shorter ...
- 19
0
votes
0
answers
74
views
How to post-process these Blu-Ray files?
I have downloaded some video files (MP4) from the web and want to create a BD from them. I've used ConvertXtoHD3 for that, and it does basically a nice job, with menus and all that. Unfortunately the ...
0
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1
answer
208
views
How to convert multiple .VTT segments to one single .VTT file or subtitle file?
I have a list of .VTT segments from a bunch of URLs for a stream looking like these (the total amount of segments is much higher):
https://drod24s.akamaized.net/all/clear/none/d9/...
- 11
0
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0
answers
51
views
MPEGTS across devices has choppy audio
I want to stream video and its audio between devices. On my pc I am transmitting it using
ffmpeg -re -i "video.mp4" -vcodec libx264 -f mpegts udp://192.168.1.106:1234?pkt_size=1316
And on ...
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3
votes
1
answer
267
views
FFmpeg zoompan animation results in zig-zag pattern
The goal is for a user to specify a zoomPoint in a video and we then render that using FFmpeg. There will be a zoom in and zoom out animation. Here are some example values:
"scale":4, ...
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0
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1
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327
views
How to put thumbnail on the video?
Does someone knows how to put thumbnail on the video? I have local files on my windows' laptop, but there are no thumbnails on it, so someone knows how to put thumbnails on it?
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2
votes
1
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147
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FFmpeg - Using Firequalizer filter based on duration
I try to use Firequalizer filter as audio equalizer in my video. I want the filter to be applied on the first 30 seconds of each minute in the video and disabled for the next 30 seconds. It will have ...
- 19
0
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1
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2k
views
How can I get a video URL list (e.g. YouTube playlist) as a playlist file (for media players)?
Following these steps has gotten me almost all the way:
I can get a text file of YouTube URLs from a YouTube playlist by using this https://thetubelab.com/get-all-urls-of-youtube-playlist-channel/ ...
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2
votes
1
answer
166
views
Interlaced pixels on texts and UI elements randomly happening when some videos are playing
I've got a very annoying bug, and I'm afraid I'm running out of clues to find where the problem may come from.
What?
Sometimes, my screen starts to "randomly" have a visual bug which makes ...
- 131
1
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0
answers
8k
views
I would like to play 2 x 4k videos side by side on dual monitors on Linux using ffplay
I would like to use ffplay (if possible) to play 2 x 4k videos on different (dual) monitors connected to the same Linux (Ubuntu) machine. They are same videos (same in length, etc), just differ in ...
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0
answers
106
views
How to use trim and concat of FFmpeg correctly?
I'm using the media-autobuild_suite (on Windows 11). My installation is a week old. Tomorrow I will update it again.
I have one private video file. I wish to cut out two parts of it and then merge the ...
- 127
0
votes
0
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156
views
ffmpeg stream image flow to AWS S3
For a video monitoring solution, I want to push thumbnails of an incoming video (TS/UDP) to a S3 bucket from where those thumbnails are shown on a web page
Currently the following bash loop is working:...
1
vote
1
answer
461
views
Adding timer to video using FFmpeg
I'm trying to find a way to add a countdown text to videos using FFmpeg.
I want the text to be "Time left: mm:ss" but to avoid leading zeros for minutes.
So, for example:
Time left: 10:01
...
- 25
0
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1
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31
views
I need to make a flip video and add 2 watermarks, my script doesn't work for some reason? ffmpeg
I need to make a flip video and add 2 watermarks, my script doesn't work for some reason (the script just flips the video, but does not apply watermarks).
ffmpeg -i input.mp4 -i watermark.png -i ...
1
vote
1
answer
313
views
FFmpeg add text in a box with rounded corners
Is there a way to add a text with countdown timer to a video using FFmpeg where the text is contained in a semi-transparent box with rounded corners with one of the side borders in a different color?
...
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1
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0
answers
386
views
Performing nvidia gpu scaling on ffmpeg desktop captured using ddagrab (on Windows)
Looking for some advice on how to combine options relating to screen grabbing with ddagrab using ffmpeg, encoding using nvenc and scaling down in the process.
I can successfully capture desktop to ...
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2
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2
answers
388
views
Is it possible to change tags that are not writable by exiftool?
I have a (Dolby Vision) video file test.mp4 but has hev1 in video track Codec ID (ffmpeg) or Compressor ID (exiftool)
exiftool -CompatibleBrands -CompressorID test.mp4
Compatible Brands :...
- 153
0
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1
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212
views
FFmpeg text box padding using boxborderw
I'm trying to overlay a text on a video using FFmpeg 6.0 drawtext filter.
In the documentation it says:
boxborderw: Set the width of the border to be drawn around the box using boxcolor. The value ...
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2
votes
1
answer
122
views
I cannot seem to add subtitles to MP4 using FFmpeg
I have a video called test_video.mp4 downloaded from YouTube
This is the information of the video obtained by running ffmpeg -i test_video.mp4:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_video.mp4'...
- 205
2
votes
0
answers
66
views
How to know my audio codec will support the output container in. Fluent-ffmpeg [closed]
I am building a YouTube downloader. As YouTube doesn’t store high quality video with audio and store them separately so I have to merge them on server.
For merging I am using a Node.js server with ...
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1
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0
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81
views
How do I create very large .gif files from .png frames, avoiding memory limitations?
I would like to create a .gif from single .png frames and am dealing with lots of very large files. The .png files are roughly 10GB in total.
So far, I have done the following:
ffmpeg -framerate 30 ...
- 11
0
votes
0
answers
251
views
How can I play multiple videos in VLC with a specified delay between them?
I've just read the VLC-based answer to this question:
How to play multiple videos side-by-side synchronized?
... and it works for me. However, I now want to play one of the videos at a delay. How can ...
- 9,751
1
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0
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36
views
What is the typical workflow for running "multiple" FFmpeg commands? [closed]
For example, I have listed these out as possible commands so far:
# ogg to mp3
ffmpeg -i audio.ogg -acodec libmp3lame audio.mp3
# add audio to video:
ffmpeg -i audio.mp3 -i video.mp4 video_audio_mix....
- 387
0
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0
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97
views
Why do Matroska files (.mkv) with '.der.' in the file name not play in Google Chrome but instead bring up a download dialog?
Usually, Matroska files (.mkv) that I open in Google Chrome (e.g. https://www.example.com/example.mkv) are played directly in the browser.
However, I noticed that files with .der. in the file name (e....
1
vote
1
answer
75
views
How to apply Grain in FFMPEG like CAPCUT Grain adjustment
I'm trying to find information about how to apply grain in video using ffmpeg, but unfortunally i couldn't find a viable solution.
I need to apply a grain like Capcut. Here screenshot
I was reading ...
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