Questions tagged [video]

related or about the video issues, the range varies from playing a video file, the formats, tools to work with it in *nix operatin systems up to issues surrounding it in specific environment (ie. console, framebuffer, X11 ...)

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299 views

How do I use mpg123 to extract the audio from a .mov video to a .wav file?

I have some video files in .MOV format and I want to extract the audio from them to .WAV files. I cannot use MP3 files as I'm trying to feed the sound into a sonographic analysis program (WASP) that ...
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0answers
21 views

Play two webcam feeds on top of each other in fullscreen mode

I'm looking for a linux app which I can configure to play on launch the feed of two connected webcams. The feed of webcam 1 should be fullscreen, while the second one should play in a specified ...
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2answers
3k views

How do I reduze the size of a video to a target size?

I want to reduce the size of a video to be able to send it via email and such. I looked at this question: How can I reduce a video's size with ffmpeg? where I got good advice on how to reduce it. ...
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1answer
6k views

H.264 videos fail in Firefox or Chromium on Fedora 30

https://www.youtube.com/html5 reports my browsers (Firefox 66.0.5-1.fc30 and Chromium 73.0.3683.86-2.fc30) on my Gigabyte GA-970A-UD3 with a Radeon RX-580 GPU don't support H.264. I've tried ...
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0answers
30 views

External network display for playing media

On my Windows 10 computer I was able to right click a media file (video) and choose "Play To ..." and then select my Sony Tv which was plugged into the network. The video would then play with the ...
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1answer
516 views

Screen Tearing on Linux Mint Mate with Intel Graphics

I'm experiencing screen tearing with Lint Mint Mate 19.1. Running lspci | grep VGA prints 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated ...
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0answers
570 views

Why is VLC Media Player playing videos like this?

Please see the short GIF recorded screencast of the problem in action. This is how all videos open and play, I cannot see a darn thing, just these big colored bars where the color is taken from the ...
2
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2answers
145 views

How to list all files less than 1080p

There are a number of Youtube channels that I archive using a daily cron script that runs youtube-dl. However, in checking over the videos to make sure my script is working, I noticed for one of the ...
3
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0answers
480 views

restrict access to the webcam to certain user/software on Ubuntu 16

I would like to restrict the access to the webcam only to certain programs/users. I use Ubuntu 16.04. If I am right my webcam is linked with /dev/video0 (just as an example), which is owned by root ...
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2answers
9k views

Multiple /dev/video for one physical device

First some specs: my computer is an HP EliteBook 8460p. It comes with an integrated Chicony HP HD webcam. My issue is that a lot of applications (well, at least Skype and guvcview) are displaying ...
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0answers
46 views

Remote-control or video-stream a closed-computer-system with another computer (no VNC)?

I have two computers next to each other (A - test computer, B - recorder/remote client). I need to be able to either: remote control computer A from computer B, or record and project/stream video out ...
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1answer
2k views

How to embed current time with ffmpeg?

I'm using ffmpeg combined with tee and mplayer to have a simple video livestream and recorder over SSH. Now, I'd love to embed the current (server) time in the stream. The format doesn't matter much, ...
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1answer
1k views

Power off video card until reboot from command line?

I have "headless" machine with video card, I use very rarely, only if I want physical access to it. The cooler of this video card became old and started to produce bad noise. Can I disable this video ...
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0answers
532 views

ffmpeg black screen recording

When I record my desktop or recording video with ffmpeg it generates a black video. My operating system is Ubuntu 18:04 bionic kernel 4.16 Here is the command I'm using : ffmpeg -f x11grab -s ...
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1answer
2k views

error ffmpeg Cannot open display :0.0+0,0, error 1. :0.0+0,0: Input/output error

Hello I get this error when i want to capture my screen on linux with ffmpeg ubuntu 16:04 : the command i'am using : $ ffmpeg -f x11grab -r 15 -s 1920x1080 -i :0.0+0,0 -vcodec rawvideo -pix_fmt ...
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0answers
77 views

How to modify blended video durations with a -filter_complex command argument in ffmpeg

Building off the solution provided in this thread, I'd like to know how to make simple modifications to a complex command argument which uses ffmpeg to interweave two videos by dissolving them into ...
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0answers
675 views

Evaluate the similarity between two video files

I'm looking for a method that reliably gives me a "mathematical distance" of two videos from one another. Similar to how the Levenshtein distance can be used to get the distance from a ...
1
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1answer
2k views

Download error with youtube-dl and axel

I am trying to download following video: https://www.youtube.com/watch?v=pQWj2Fgxdrc by combining 'youtube-dl' and 'axel'. I am trying to download this video in such a way that I want these two ...
1
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1answer
396 views

How to extract the “stored frames” without rely on fps?

I noticed if I extract frames with this command: ffmpeg -i sample_nosound.mp4 $filename%03d.jpg It will extract depends on fps by default. ffmpeg -i sample_nosound.mp4 shows this video has 6 fps, so ...
3
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1answer
2k views

How to find and delete duplicate video (.mp4) files? [closed]

I have 16,000+ short video clips and there are lots of them that are exactly alike to the human eye, but if you examine very closely you will find that one or the other may have an extra 1 second (or ...
3
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2answers
666 views

How to transition smoothly and repeatedly between two videos using command line tools?

I want to output a video using two videos as input, where these two videos fade (or dissolve) into each other in a smooth and repetitive manner, every second or so. I'm assuming a combination of ...
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0answers
18 views

Suitable parameters for hours of screen capture

I need suitable parameters for very, very long screen captures using ffmpeg. Quality: Only occasionally needed. If text is readable, that's enough usually. I can use -qscale:v *[0-32]*, of which ...
0
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1answer
329 views

List files that are not H264 encoded

I want to convert any files in a large media collection that are not encoded with H264. In order to do that I need a tool to list all the files, I need to convert. There are a lot of files to go ...
21
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2answers
38k views

How to recover a broken mp4 file: moov atom not found

I made a recording with ffmpeg -f alsa -ac 2 -i plughw:0,0 /tmp/audio.mp4 I then moved /tmp/audio.mp4 to another directory (/root/audio.mp4) without stopping ffmpeg leading to a broken .mp4 file: ...
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0answers
67 views

CLI Tool to extract images from video slideshow

I'm looking for a tool that can take a video (mp4) that is composed of about 50 still images and extract all of the images out of that video. Is there anything like this that exists?
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0answers
133 views

Split DVD iso of TV series into episodes

I have a lot of DVD isos (I also have the physical DVD's, but I have ripped them, so they shouldn't be needed for this), of various TV series. Each DVD contains several episodes of the series, but ...
3
votes
1answer
240 views

Find what program accessed a kernel module

How do I access a list of users/programs that accessed a certain module? I run: lsmod | grep ^uvcvideo This returns this line when no application is using my video camera: uvcvideo ...
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1answer
638 views

Connection refused to local ffserver

I am unable to send my desktop capture to a localhost ffserver: the connection to the local server is refused. # ffserver >/dev/null 2>&1 & # ffmpeg -video_size 1600x900 -framerate 20 -...
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1answer
204 views

Cannot send desktop capture to ffserver?

I am simply trying to send a ffmpeg stream consisting of a desktop capture to a local ffserver: # ffserver >/dev/null 2>&1 & # ffmpeg -video_size 1600x900 -framerate 25 -f x11grab -i :...
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2answers
1k views

Udev rules for seemingly indistinguishable devices

I'm trying to use udev to automatically set up symlinks to an Intel RealSense D415. This is because I use several cameras on the machine and need to be able to reliably refer to them via a filename (...
6
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2answers
4k views

Is there any video player which can seek with thumbnail like in YouTube?

When you watch a video in YouTube, you can seek it with the thumbnail preview. Many Windows' and MacOS' video players have this feature, but what about Linux's? I've already read this same question, ...
1
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1answer
157 views

How do you take a video of a program running on a headless machine

I would like to take a video of what would run on the X Server on a remote machine and store that on my local machine. I thought of forwarding the X Session and using a screen capture tool, but ...
2
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1answer
2k views

How to speed up video to make timelapse?

I've got a video file with 1.0 FPS (i.e. one frame per second) and would like to re-encode it so that it plays ca 20x faster. A short 1 FPS sample is here: http://s3.aws.nz/cam-1537668742.mp4 I can ...
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0answers
71 views

Partially replace video stream while preserving audio stream

Consider a video file with one video and one audio stream. I want to replace the video stream partially while preserving the original audio stream. With partially I mean to replace certain seconds ...
1
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0answers
320 views

trim video files via audio track information

Is there a way to pass a folder of .mp4 files and trim them by audio track? Say the first 20 seconds has no loud audio and the last 20 seconds has no loud audio, is there a way to remove the first and ...
1
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0answers
984 views

Codecs support disabled in Firefox

In Firefox 61, under Tumbleweed I cant play videos from youtube, when checking for the html5, it says: So I have been playing with the about:config and about:buildconfig but the mp4, h264, etc ...
1
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1answer
430 views

A fast question about GVT-g Intel?

I read this howto and have the following questions: Is this like the GPU passthrough VFIO (you need two monitors and two different graphic cards, and a motherboard which supports IOMMU feature)? Or ...
1
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2answers
3k views

FFMPEG: change input without stoping proccess

how i can change input on ffmpeg without stop process on linux Debian 9? im user decklink input and i need to change to file mp4 input. ffmpeg -f decklink -i 'DeckLink Mini Recorder' -vf setpts=PTS-...
0
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1answer
628 views

Arch screen freezing / pausing

My arch laptop has been freezing during video playback recently - not completely, but the video playback will freeze though audio will still play, and will unfreeze after input (moving the mouse or ...
1
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1answer
4k views

Reset audio/video drivers and configurations to a fresh state

I recently moved my previous install of Linux Mint 18.1 from a Dell Inspiron to a newly bought Dell XPS 9360, connected to a Lenovo Thunderbolt 3 Dock, which hooks it to all my peripherals and an ...
2
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1answer
6k views

Ubuntu 16.04 / 18.04 video playback lags / stutters

Since some weeks (I didn't use the video playback on this machine for quite a while), I experience lagging/stuttering while playing videos, regardless if it is in a browser or in Ubuntu videos, only ...
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1answer
1k views

How to force 60 Hz in 1366x768 despite kernel bug after kernel 4.13?

If your screen resolution is 1366x768 and your Intel card is able to go down to 40 Hz screen refresh rate for power saving (and most modern laptops can, no matter how cheap) instead of the usual 60 Hz,...
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2answers
916 views

Linux showing incorrect file modified time for camera video

I recorded a video with my camera and when I open the directory containing the video files, the modified time is always wrong. Here is a screenshot from the video clearly showing the correct time ...
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0answers
252 views

Debian Intel graphic drivers for nuc6i7kyk

I have installed Debian Stretch on a nuc6i7kyk, but I cannot get the video drivers to work (I keep getting UNCLAIMED drivers). Here as much info I can share on my install: $ glxinfo | grep -i ...
2
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1answer
6k views

Chromium not playing live youtube videos and other online streams

This is posted in order to provide an answer. Details about the initial problem are here. It involved not being able to play Youtube live streams, Tweeter live streams, Vimeo non-live streams and ...
3
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3answers
8k views

Cannot play live Youtube on other streams in Opera - no h264 support

I have good reasons to use Opera as my default browser (I find it lighter than Firefox Quantum and Chrome/Chromium, I like its speed-dial bookmarks, as well as other features and details). Opera ...
2
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0answers
918 views

Use guvcview to setup Logitech C920 webcam and keep configuration

I have a Logitech C920 webcam connected to my computer running Debian Linux. I want to access the stream by using mplayer (/dev/video0) and it works out of the box. However, the saturation/brightness/...
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0answers
571 views

play 4 rtsp streams in fullscreen

I have 4 IP cameras in my network, and I need to play the 4 streams at once in a grid view, currently i execute this command: ffplay rtsp://10.1.10.123 for each IP and then I rearrange the windows,...
2
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2answers
1k views

Turn off, not stand-by, console tty1 video

I want the opposite of what seemingly everybody else wants: on my plain old character mode tty1 console directly served by the video card of my bare metal Debian 8.10 Jessie box, I want the screen ...
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2answers
2k views

Udev Rule to discern 2 identical webcams on Linux

I have 2 identical webcams plugged into my Raspberry Pi. I want discern which camera is which based on the USB port they are plugged in to. This is the purpose of udev, so I wrote the following rule:...

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