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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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1answer
36 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 where I got good advice on how to reduce it. Problem is that I need to manually calculate the ...
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1answer
107 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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18 views

Best way to sync OMXPlayer audio and video?

I am having issues getting OMXPlayer video played on a TV via HDMI to sync with audio streamed over the network. My thought was delay the video output by ~500 ms then use pavucontrol to fine tune the ...
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1answer
68 views

Bash script: Sorting video files by duration [closed]

I have multiple video files with different duration in one folder and I would like to sort these files per 1 hour. What I need to do: get the duration of video files, then move files into ...
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0answers
17 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
49 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
59 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 ...
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2answers
56 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 ...
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0answers
41 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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0answers
97 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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22 views

Force stream order in ffmpeg (via mpv)

What is the preferred way to force ffmpeg (via mpv) to order the streams with video first and audio second? Wrong stream order can result in playback problems or certain sites rejecting the webm for ...
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0answers
12 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
40 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
32 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
122 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
115 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
44 views

GStreamer: APNG, GIF or animated WebP

I want to generate an animated preview of a video using gstreamer for preview on a webpage. I'm able to get a static PNG with the pipeline filesrc location=... ! decodebin ! videoconvert ! pngenc ...
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0answers
43 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
153 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 string to ...
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1answer
249 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 ...
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1answer
48 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 ...
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1answer
207 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 ...
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2answers
80 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
15 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 ...
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0answers
20 views

Create a video from pictures and audio for each picture

I have many slides (pictures) and spoken audio for each slide. Can I turn this into a video? How long each slide is shown is determined by the length of its audio. Can I somehow script this and ...
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0answers
21 views

Gstreamer - problem with mkv playback and jack

I use gst123 as my regular audio and video player. I'm now using a Saffire 6 USB interface, which works out of the box using jack so I select jack as audio-output device with the -a option like this: ...
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1answer
59 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 ...
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1answer
3k 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
25 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
42 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
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1answer
42 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
183 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
62 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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0answers
39 views

Issues with Nvidia drivers [closed]

Something happened to my laptop during an update it seems and I have been experiencing MANY issues with apt-get and dpkg trying to update packages due to unmet dependencies. Everything I have found ...
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1answer
149 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 (...
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2answers
622 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, ...
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1answer
39 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 ...
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0answers
90 views

How to drop bad frames in video file?

I've got a video footage from a security cam in MP4 format that from time to time contains broken frames. When I export the video to JPG frames the broken frames can be easily identified: Is there ...
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1answer
701 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
28 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 ...
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0answers
164 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 ...
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0answers
715 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 ...
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1answer
265 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 ...
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2answers
668 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-...
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0answers
247 views

gst-launch full screen

I've been using gstreamer on yocto project for playing video on HDMI, but I can't find anyway to play the video in full screen. Command I'm using is gst-launch playbin uri=file:///file/path How ...
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1answer
468 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 ...
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0answers
244 views

How to stream video on HDMI device using ffmpeg

I'm want to take mpegts from udp and out to hdmi using ffmpeg. Command I'm using is ffmpeg -hwaccel vaapi -i udp://<UDP_ADDR> -f alsa hdmi:0 This streams only audio on HDMI and not video. How ...
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1answer
246 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 ...
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146 views

Set video to LVDS-1:d value in grub2 before booting

I need to set video to LVDS-1:d value in grub2 before booting. I may get to grub file by pressing e or to command line by c. I did many tries but not succeed. Don't now which place in the file, use ...
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1answer
3k 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 ...