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 ...)

232 questions with no upvoted or accepted answers
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Convert video to exactly the same format as another video

Suppose I have two video files A and B. Now I want to convert A to the same format (i.e. same container, same audio and video codec), same bitrate, size etc. as B. Is there a way to do this ...
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0answers
14k views

How to significantly lower a video file size with ffmpeg without quality loss?

I see there are videos on youtube with 1080p resolution that are more than 10 minutes long and only 50-60 mb in size. I have a video only 3 minutes long and only 720p resolution but unable to bring ...
5
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1answer
5k views

Why do the command cvt and gtf give different frequency values

I am trying to setup a xrandr mode line for a X display but in attempting to find the appropriate parameters, I note there are two different calculation programs (see below). Why the difference in ...
5
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0answers
672 views

Are Apple Live Photos supported on Linux?

I have a lot of Live Photos that I took with my iPhone. Is there any Linux application that supports viewing this combination of a photo and video file? I know I can split the photo and video parts ...
5
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1answer
4k views

How to view adobeconnect video offline?

I want to watch some lectures created with adobeconnect. I have the lectures downloaded to my Ubuntu 12.04 machine. Each one consists of a stream that includes a video window of the professor ...
4
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0answers
987 views

Can I change the X rotate the xf86-video-fbdev during execution?

Below is my /etc/X11/xorg.conf.d/1-fbdev.conf. /etc/X11/xorg.conf.d/1-fbdev.conf Section "Device" Identifier "LCD" Driver "fbdev" Option "fbdev" "/dev/fb0" Option "Rotate" "UD" EndSection I ...
4
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0answers
5k views

G-Sync on Linux — how to get it working?

I have a new system with a couple of 4K monitors with G-Sync support (Acer XB280HK), and a card capable of driving them (Geforce GTK 970). I have the Nvidia proprietary driver installed, version 352....
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0answers
119 views

How to loop over display numbers in .xprofile?

Is there a simple command to get all the display numbers (and only the display numbers) connected to the computer? The use case is that I'd like to have separate colour profiles ~/.color/icc/${display}...
4
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0answers
7k views

Switching from Nvidia proprietary driver to Nouveau driver for Nvidia card on Debian wheezy

I am running Debian wheezy. I have the following Nvidia graphics card installed: GeForce 7300 SE/7200 GS. I am currently using the proprietary Nvidia graphics drivers. I have the following packages ...
4
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2answers
534 views

Viewing a screencast encoded with camtasia

I have downloaded the screencast on this page, http://jaderholm.com/screencasts/org-mode/. I can watch in firefox but the viewer has limited controls. So I would rather watch it on a regular video ...
3
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0answers
89 views

Why does specifying audio input before webcam video input in FFmpeg cause them to go out of sync?

I am using FFmpeg to stream from a webcam and a pulseaudio source to an RTMP server. I know that argument order has an effect in FFmpeg. But I have found that if I specify the audio input stream ...
3
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0answers
478 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 ...
3
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1answer
625 views

video player which can step forward and backward frame by frame smoothly

I am looking for a video player which can allow me to step forward and backward frame by frame by using keyboard shortcut. I have video with 24fps. Presently i am using mpv. I am trying the ...
3
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0answers
1k views

Hardware video acceleration in VLC

I have not been able to get VLC to use VA-API on my machine and it's driving me insane! I'm running Arch Linux on a ASUS ZenBook UX305CA with Integrated Intel HD Graphics 515. I have installed libva-...
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0answers
1k views

find original video if you have a short clip from it

I while back I wrote a paper with simulations, and to illustrate some points, I made a few cuts from chosen from long videos of the simulation running. Unfortunately, I absolutely forgot to record ...
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0answers
295 views

“Stretching” subtitles with command line tool

I got a video file with a duartion of e.g. 30 mins and a subtitle file that belongs to this video. But the subtitle file only lasts 25 minutes. Now I'm searching for a way to achieve the following: I ...
3
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0answers
2k views

sound recording with motion?

I want to set up a daemon that starts recording video with sound when it detects noise or movement. There are tools that do that separately but can they be done at the same time? Can I set up motion ...
3
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2answers
6k views

Driver installation NVIDIA GeForce 940-mx not possible

This is a really specific question, I have come here before because of it but now I really think I am out of options and trying to see if anyone has experience with this specific video card. Have ...
3
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0answers
505 views

Streaming realtime video

I'm trying to stream realtime video from gstreamer under Ubuntu to VLC under Windows. Gstreamer is started via script: v4l2src device=/dev/video0 ! video/x-raw,width=320,height=240,framerate=30/1 ! ...
3
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0answers
748 views

Using mpv ASCII output with w3m

mpv is a video player that can output ASCII video (like mplayer2 and vlc, but with colors). I would like to use it with w3m, within w3m or showing a link to open it in another window using mpv. For ...
3
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0answers
4k views

How to re-encode file A.mp4 with the same settings as B.mp4?

I have a MP4 file with AAC audio and H264 video, let's call it B.mp4. I also have file A.mp4 with the same picture resolution, but: different FPS possibly different audio/video bitrate different ...
3
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0answers
219 views

How to create a Music Mix video with kdenlive?

I am trying to use kdenlive (0.9.10) on Ubuntu 14.04 to create a simple music-mix clip (for youtube). This clip has a total length of about 90 minutes and is composed of several mp3 tracks, which ...
3
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2answers
2k views

How to deal with tearing in Gentoo on NVIDIA?

See Why is video tearing such a problem in Linux? for the reasons behind why tearing is a problem in the first place, and why the usual "tricks" usually suggested (like "disable compositing", ...
3
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1answer
2k views

Old ATI Video Card on Debian 8 - Xpress 200 - model: 1150

Well, my problem is very complicated, I've an old machine (Dell Vostro 1000) where I'm using Debian 8 with XFCE. This machine have an integrated video card (ATI MOBILITY RADEON XPRESS 200 - Model: ...
3
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0answers
662 views

Black Screen Booting Into Linux Mint (On Dual Boot Machine w/SLI + 2 Monitors)

I'm currently dual booting Linux Mint and Windows 8 on a machine with dual ASUS nVidia GTX 770s running in SLI (on an ASUS Z97-Deluxe motherboard). Everything works fine on the Windows side, but when ...
3
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1answer
1k views

How do I run webm video file in firefox using HTML5 on linux?

I am using apache server on linux and want to run a .webm video file. I have .webm video file which i am trying to run in firefox (V 12.0) using HTML5 but the browser is showing as "no video with ...
3
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0answers
4k views

Using RAW video encoding with gstreamer & VLC

I'm streaming RAW video with gstreamer like so: gst-launch-1.0 -v videotestsrc ! rtpvrawpay ! udpsink host="127.0.0.1" port="5000" This outputs the following caps: caps = application/x-rtp, media=(...
3
votes
1answer
398 views

Open a program (VLC) and move it to the foreground

On a Mac, specifically, when I use the VLC command line to open a video file, it opens in the background by default. How can I instead move it to the foreground whenever I run the command to open a ...
3
votes
1answer
1k views

Turning off default video output with xrandr when external monitor is connected

I'm new to bash scripting, and I'm trying to configure my video outputs so that my laptop display gets turned off when I connect an external monitor via VGA. That's the script I came up with, pretty ...
3
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2answers
1k views

How can I run setfacl -m group:group2:rwx /dev/video0 /dev/snd/* on login?

Q: How do I grant permissions to /dev/video* and /dev/snd/* to a second user, user2 when logged in interactively as user1? I have written a wrapper for sudo that clones the XAuthority settings, and ...
3
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0answers
345 views

Libav: Find out the exact time that the first frame coming from an RTSP stream was dumped into a file

I am dumping an RSTP stream from a web camera into a file using avconv: avconv -f rtsp -rtsp_transport tcp -i rtsp://user@password/ 192.168.1.4/stream.cgi -t 100 -c:v libx264 -s 1024x768 -an /home/...
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0answers
1k views

Stereo capture with v4l2

I am trying to capture images from 2 cameras using the driver v4l2. I want to capture them at the same time so I use threads with conditions to start the capture at the same time. The problem is that ...
3
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0answers
390 views

How to route one video device to multiple programs

I'd like to direct the output of a single capture card (Hauppauge PVR-150) to two programs: VLC (for streaming on LAN) and MythTV for scheduled recording. I think it's possible to do this with the ...
3
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0answers
491 views

Bad HD video deinterlacing processing

I have Ubuntu 12.04 32-bit with Unity. My system configuration is: CPU: Core 2 Quad Q6600 (2.4 GHz) RAM: 8192 Mb DDR2 Kingston Video: Palit GeForce GTX 260 216 SP, and my screen resolution is ...
3
votes
1answer
2k views

Ffmpeg problems on centOS 5.8 64 bit

I did install ffmpeg with winff, unsuccessfully when I try converting avi to x264, it says I don't have it. When I try to convert mp4 to Xvid I get unknown encoder 'libxvid'. It's like nothing really ...
2
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0answers
22 views

How can I maximise a video in a tiled window only?

Say I have 3 windows tiled on my workspace. A vim terminal session tiled vertically on the right A pdf tiled in the top left corner A youtube video playing in chrome and tiled in the bottom left ...
2
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1answer
140 views

ffmpeg vaapi encode causes black bar on the right side

I'm trying to transcode an 854x480 h264 mp4 video to an h265 mp4 video using vaapi. The video does come out nice looking, and is encoded very quickly. But there is a black bar on the right side of the ...
2
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0answers
2k views

Script for ffmpeg webcam audio video recording

I've bought the very popular Logitech C920 for creating YouTube videos with ffmpeg. My desire is to build a script for easy recording without bothering with the powerful but rather cryptic ffmpeg ...
2
votes
1answer
1k views

GParted live graphical mode not working

I want to run GParted live 1.0.0.3 on a laptop with both an integrated and discrete graphic card. I managed to start GParted using the "vga=normal" boot option, but X refuses to start either if select ...
2
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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 ...
2
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0answers
567 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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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 ...
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/...
2
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0answers
398 views

Cannot turn on external display with xrandr

I'm running Linux on my Macbook Pro with i3 and I have been able to get everything working execpt my external monitor from the HDMI port. xrandr sees the monitor but the monitor still says "no signal" ...
2
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0answers
90 views

adobe premiere elements 12

My MS Win8.1 got corrupted on a Dell M4500. I would love to just run linux on the new SSD I installed and not pay MS another dime for Win10 pro. But I need Adobe Premiere Elements (linux editors don'...
2
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0answers
739 views

How to get video mode given by hwinfo when it doesn't work? And how to set login resolution?

I tried to follow the suggestion at this previous post: Use sudo hwinfo --framebuffer as described, choose a video mode you would like to see during boot in console, then add the option vga=nnn to ...
2
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1answer
191 views

Creating a timelapse with guvcview

Is there a way to create a timelapse video (or similar) with guvcview? I'm using an external (USB) camera and ordinary footage seems to very quickly fill a hard drive. Can I get it to record an ...
2
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0answers
921 views

HiDPI screen and scaling

I recently got a new work laptop which has a native resolution of 3200x1800. It works great. I've been able to get things to be mostly the right size with KDE's display scaling... but it's not quite "...
2
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0answers
3k views

Enable Xorg video output when monitor disconnected at startup

We have up-to-date Debian Jesse boxes configured with Xorg / lightdm / xfce4. They're set up to auto login and run some programs at startup. This normally works just fine. The problem is when there's ...
2
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0answers
66 views

Screen won't work once monitor is disconnected

I have a JetWay PC (JBC375F3AW) running CentOS7. When it boots up everything works OK. If I remove the cable going to the DVI port and re-connect it, it wont work. The same goes if I boot the box ...

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