All Questions
122
questions
0
votes
2
answers
69
views
VAAPI decoding on UBUNTU does not display video
I am trying to decode and display a video using gstreamer vaapi streamed over ethernet network. I don't have any errors just the video is not displayed.
The pipeline used on sender is:
gst-launch-1.0 ...
0
votes
0
answers
47
views
Why does FFmpeg encoding stall on Ubuntu with DVD video file?
I've encountered a challenging issue while using FFmpeg on Ubuntu to encode a DVD video file contained in a .bin format. Despite various attempts (also employing vlc or bounting converted .iso), ...
- 821
1
vote
1
answer
102
views
FFmpeg trimming of Linux Screencast video does not work as described in another answer
I used the answer(s) from this questions, however my video is not trimmed.
Using ffmpeg to cut up video
How to reproduce reproduce:
The Video I am talking about was recorded via the Ubuntu 22.04 ...
- 129
1
vote
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 ...
- 11
1
vote
0
answers
419
views
Ffmpeg No such file or directory creating hls output
I am using ffmpeg to create a hls live stream with the following command
ffmpeg -i "rtmp://domain.com/stream/6" -c:v copy -c:a copy -f hls -y -preset superfast -hls_segment_type mpegts -...
- 13
0
votes
0
answers
1k
views
ffmpeg error with SIGSEGV
ffmpeg was killed with signal SIGSEGV (using fluent-ffmpeg in nodejs on ubuntu)
I am expecting ffmpeg to take a provided url and timestamps, then trim the video down. Once that happens I want it to ...
0
votes
1
answer
54
views
Large video delay with Nvidia T1000 (4GB) and Ricoh Theta Z1
When streaming UHD ([email protected]) to a video output (using a Nvidia T1000 4Gb 1065MHz 128bit graphics card) via USB the video delay is large (30 seconds). Not only is it large, but the delay ...
- 143
0
votes
0
answers
427
views
Recursively search all subfolders for png images and convert them to one mp4 video
I have timelapse camera that is recording a png picture every 30 seconds. The timelapse system makes a subfolder that has the date as its name and then each subfolder contains png files which are ...
7
votes
3
answers
3k
views
All video players (including browsers) fail to play any videos until reboot on Ubuntu 20.04
After some uptime (quite randomly, it can happen after 2 days or an hour), videos on my computer start to freeze. There's no error messages, any video playback just stops like its on pause, though you ...
- 81
0
votes
1
answer
155
views
Anything with an MPEG codec plays too fast on Ubuntu
I'm not sure when, why and how it changed, but at a certain moment video and mp3 files started to run faster than usual (witch chipmunk like speech).
I have a Radeon RX550 card which I use for HDMI ...
1
vote
0
answers
494
views
How can I run multiple USB webcams on Linux?
I wanted to build a system that can take live video data from four different webcams to run object detection over, but each time I try running a second webcam, the first shuts down.
I'm running Ubuntu ...
- 11
1
vote
0
answers
194
views
why smplayer don't show subtitle?
When I try to load the subtitle or drag and drop the subtitle on the movie, it does not show any reaction and the subtitle is not displayed. Does anyone have a solution?
- 514
0
votes
0
answers
1k
views
Why does VLC player lag after being paused?
On Ubuntu, why when I pause VLC player and then start it after a few seconds, part of the movie doesn't play and jumps forward? This problem didn't occur with Windows.
Someone said that version 2 or 4 ...
- 514
2
votes
1
answer
3k
views
FFmpeg - Enable all video filter (-vf) options at a specific time in the video
Is there an option I can pass so that my -vf or -filter_complex options only become active at a certain time in the video (i.e. 5 seconds after the start of a video?) in one command (without concat'...
- 2,418
1
vote
1
answer
1k
views
minterpolate:slowmotion video with stuttering / stroboskop effect
i have the follow issue: i would stretch a video from 11min to 22min.
The Input video have a frame rate of 30FPS
i stretch ( slowmo) ist with:
ffmpeg -i 1min.mkv -r 60 -filter:v setpts=2.0*PTS output....
2
votes
0
answers
1k
views
Ubuntu ffmpeg fake webcam with mp4 error
I tried to send video (mp4) to webcam
as I follow the instruction from https://askubuntu.com/questions/881305/is-there-any-way-ffmpeg-send-video-to-dev-video0-on-ubuntu , I recompile v412
$ffmpeg -re -...
- 21
4
votes
0
answers
1k
views
Using Intel RealSense Depth Camera together with Zoom Conferencing doesn't work
I am trying to use my Intel RealSense Depth Camera D415 (which provides an RGB stream) together with Zoom for linux.
I have sucessfully installed the kernel modules and utils using the following link. ...
- 302
2
votes
2
answers
4k
views
how to fix Openshot crashing everytime when making videos longer than 4+ hours?
I am trying to create a video that is longer than 4+ hours using openshot software on Linux and Windows 7. Both test failed miserably. In fact, the whole program completely freezes within 2 minutes of ...
- 1,278
1
vote
1
answer
286
views
Firefox in Xubuntu is playing mp2t / .ts / webm video files with a deep / slow / distorted / off audio sound
Firefox latest, v70, Ubuntu 18.04
mp2t / .ts video plays fine, but audio plays really distorted, very deep like the audio has been slowed down incredibly (even though it plays at same speed).
I've ...
- 163
0
votes
0
answers
337
views
Vertical line on my monitor, incompatible monitor? Would there be a way to fix that?
I got a new server with an GeForce RTX 2060 from EVGA.
It works great on my 4K TV (although the TV is too "white").
When I try the exact same setup (I unplug the cable from the TV and plug it to my ...
- 1,640
0
votes
0
answers
479
views
how to use ffmpeg on ubuntu to encode to dnxhr 12 bit
i've been trying to make dnxhr 12 bit files using ffmpeg and it always seems to come out as 10 bit. when i've checked, it seems that my installed ffmpeg says it should be able to do this but ffprobe ...
1
vote
0
answers
1k
views
FFmpeg video capture using DeckLink on Ubuntu 18.04 not working
I've been spending the 24 hours troubleshooting this problem, but am getting a bit stuck.
Pre-info: I'm running an Ubuntu 18.04 server with a DeckLink Duo 2 card inside.
Goal: Capture video from the ...
- 11
2
votes
0
answers
31
views
Strange desktop blur out (Ubuntu 19 cinnamon desktop)
Ubuntu 19.04
Cinnamon Desktop
ASUS Nvidia GTX 1070 Turbo
2x1080p 24" monitors
1x1440p 32" monitors
i7-8700K (HT disabled)
16GB Ram
OS on Kingston NVMe M.2 256GB SSD
I'm getting a very strange blur ...
- 21
0
votes
0
answers
3k
views
USB Camera not detected under video devices (Ubuntu)
I have a problem concerning the Bresser Mikrocam SP 3.1.
I would like to read out this USB camera in real-time using OpenCV.
There is a camera software delivered with the USB camera, but according ...
- 1
1
vote
0
answers
2k
views
How to restream an HTTP stream over RTSP with VLC?
I want to use VLC 3.0.6 to take in an HTTP stream and restream it over RTSP, basically using it as an RTSP server.
I tried using this command
cvlc http://0.0.0.0:8080/stream?topic=/iris/camera1/...
- 11
0
votes
0
answers
160
views
How can I speed up laptop internal webcam capture in Ubuntu 18.04 vs Windows 10?
I am writing C++/opencv code for some image processing routines, and am using my Dell Precision 7730's own webcamera to get test video input. Video card is Quadro P5200.
I started in Windows 10 ...
- 1
1
vote
2
answers
755
views
Does the FFMPEG output depend on the machine?
I created a slideshow on my laptop with the command of
ffmpeg LOOPS -i "AUDIO_FLAC" -filter_complex "TRANSITION MAP
concat=n=30:v=1:a=0[v]" -map "[v]" -map 30:a -shortest -q:v 1 -q:a 1 output.mp4
...
- 1,052
0
votes
0
answers
261
views
Ubuntu 18.04.1 DVD Install Disc has corrupt graphics on AMD A8 graphics
After booting Ubuntu 18.04.1 from a DVD (burned the latest ISO) the laptop booted with a corrupt screen (the mouse cursor is clearly visible though).
Is there a function key or hidden option? This is ...
- 2,147
7
votes
1
answer
26k
views
Can VLC be set to enable subtitles by default?
I am looking for a way to set VLC so that by default it will enable a specific subtitle track (some people prefer to have these on by default just for ease of watching if there are multiple things ...
- 73
2
votes
1
answer
6k
views
ffmpeg: library configuration mismatch
In trying to tidy up old files using sudo apt-get autoremove I've messed up my install of ffmpeg on Ubuntu 17.10.
I've tried to remove ffmpeg using sudo apt-get remove ffmpeg and then reinstall a ...
- 21
1
vote
0
answers
145
views
Incorrect DVD rip timing
The problem using handbrake on Ubuntu. VLC playing the DVD is shown on the left, the same player playing the rip is shown on the right. The rip is "faster" than the DVD.
I am trying to create a DVD ...
- 11
4
votes
5
answers
21k
views
How to watch 360 videos on Linux
My friend has been giving me MP4 files created using his Samsung Gear 360. Is there a way for me to watch them on Linux (for me, Ubuntu) without having to upload them to youtube/facebook?
I tried VLC ...
0
votes
1
answer
346
views
Handbrake GUI Custom Preset Won't Save Encoding Speed Other Than "Fast"
Handbrake 1.0.3 GUI Version
Ubuntu Mate 16.04.2 LTS AMD64 Intel i7-920
When creating Presets Handbrake will not save "Preset" slider selections other than "fast". Selecting any other "Preset" slider ...
- 1
0
votes
0
answers
722
views
VLC record RTSP stream to file creates huge(GB) corrupted file
I am encountering a strange problem, which I don't know why happens.
I have a cheap IP camera and I am recording the stream to a file on my computer like this:
cvlc rtsp://ip/onvif1 --sout file/ts:...
- 153
0
votes
1
answer
334
views
Output video from Ubuntu Thinkpad to Epson EMP-821 projector
I have Ubuntu running on a Thinkpad Helix. I bought a used Epson EMP-821 overhead projector and found a cable to connect the computer to it.
The cable is USB on the computer side and some sort of ...
- 379
2
votes
0
answers
1k
views
How to speed up a video on Ubuntu?
In Ubuntu I have a 20 minute avi video file with audio, which I want to speed up 10fold. I have tried kdenlive and openshot, but they only speed up the video and not the audio. Using ffmpeg directly ...
- 442
0
votes
1
answer
183
views
Why ffmpeg rotate video?
I have installed ffmpeg on x32 Ubuntu 14.04 via apt-get.
sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get install ffmpeg
My command to convert video to images is:
...
- 357
0
votes
1
answer
215
views
Error when converting a video with ffmpeg
john75@ubuntu:~/Desktop$ ffmpeg -i Iyawo-mii.mp4 map 0 -c:v libx264 -c:a copy Iyawo-miii.mp4
ffmpeg version 2.8.6-1ubuntu2 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.1 (Ubuntu ...
- 9
5
votes
1
answer
9k
views
How to Stream a static video file
Hi I am trying to stream a video file (located in local machine's hard disk.) to home network/LAN.
I am trying to do this from a week now. I tried all the resource I could find then then as a last ...
- 151
0
votes
0
answers
39
views
Video concatenation excruciatingly slow
I tried using OpenShot Video Editor to concatenate a few videos of a vacation I recently went on. However, the process seems to be taking forever; I really do not want to leave the computer on all day....
- 1
0
votes
0
answers
21
views
Editing a video
I used OpenShot Video Editor to concatenate a few videos of a vacation I recently went on. However, the first 18 seconds of the video is upside down; the rest of it is fine.
Even though I am using ...
- 1
2
votes
2
answers
4k
views
Streaming 4k videos from ubuntu server via DLNA
I am running an ubuntu server in my LAN. Streaming videos and music was done with mediatomb but it looks like the server denied sending UHD videos. I also tried MiniDLNA but ended up with the same ...
- 121
1
vote
1
answer
4k
views
How to convert a video file from mkv to a format supported by the TV set?
I have a mkv video file which contains the following content:
> mkvmerge --identify original.mkv
File 'original.mkv': container: Matroska
Track ID 0: video (V_MPEGH/ISO/HEVC)
Track ID 1: audio (...
- 442
0
votes
1
answer
1k
views
Ffmpeg lose streams while using -map 0
I had a strange issue using ffmpeg on Ubuntu 14.04.
I run a command
ffmpeg -i output2.avi -c:v h264 -minrate 2000k -maxrate 5000k -bufsize 2000k -profile:v high -level:v 4 -coder 1 -s 640x360 -bf 0 -...
- 131
11
votes
2
answers
11k
views
How can I make mpv show the duration counter constantly?
I use the mpv video player in Linux. With the keys Shift+P, I can see the duration of the video I am watching.
How can I set mpv to show the duration all the time (without the need of pressing Shift+...
- 111
1
vote
1
answer
767
views
How to stop MP4 file from stuttering in Linux
Playing an HD MP4 file in Ubuntu stutters using Movie Player or LibreOffice Impress. Interestingly, when using VLC, it plays perfectly smoothly. I have noticed that in system monitor, when playing ...
- 1,697
0
votes
1
answer
48
views
How can I set preferred software to opening video files on *buntu?
Can you please help me out on how to set a software on *buntu to be the only one to automatically open when double clicking in any kind of video file?
PS: I know how to do it normally. I faced a ...
user512585
0
votes
1
answer
334
views
Should this system be capable of running HD videos, if yes whats wrong with it?
I have a Thinkpad R500 running Ubuntu 14.04 with a Radeon HD3470 and it seems like it isn't able to play HD videos without stuttering.
I tried watching this demo video (setting Youtube to 1080p) in ...
- 293
4
votes
1
answer
2k
views
Why does Chrome cause very high GPU load in full screen?
My operating system is Ubuntu 15.04.
Since a few weeks I have an annoying problem with google chrome. Whenever I'm switching to full screen mode - be it a video, a flash application or anything else - ...
0
votes
1
answer
636
views
ffmpeg to convert videos into one
ffmpeg has a wiki on Concatenate at
https://trac.ffmpeg.org/wiki/Concatenate
It does concatenation without any conversion. I'm wondering if it is possible to do the concatenation WHILE doing the ...
- 8,821