215
votes
How to do I convert an animated gif to an mp4 or mv4 on the command line?
Here's what worked for me:
ffmpeg -i animated.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" video.mp4
movflags – This option optimizes the structure of the MP4 ...
- 2,251
164
votes
How can I reduce a video's size with ffmpeg?
You mentioned wanting to reduce filesize to fit more videos on a mobile device, which is my usecase as well. All the answers here are for reducing the compression quality but nobody has mentioned ...
- 1,821
141
votes
Accepted
Watch YouTube videos in terminal
You can download videos and/or just the audio and then watch/listen to them using youtube-dl. The script is written in Python and makes use of ffmpeg I believe.
$ youtube-dl --help
Usage: youtube-dl [...
slm♦
- 344k
102
votes
How can I reduce a video's size with ffmpeg?
I tested most of the other proposed answers to this question. The test data conclusions are below. These are the proposed answers that I tested:
(BR) Modify the bitrate, using:
ffmpeg -i $infile -b $...
- 1,129
93
votes
Merge two video clips into one, placing them next to each other
To be honest, using the accepted answer resulted in a lot of dropped frames for me.
However, using the hstack filter_complex produced perfectly fluid output:
ffmpeg -i left.mp4 -i right.mp4 -...
- 1,031
84
votes
Accepted
Get total duration of video files in a directory
I have no .ts here but this works for .mp4. Use ffprobe (part of ffmpeg) to get the time in seconds, e.g:
ffprobe -v quiet -of csv=p=0 -show_entries format=duration Inception.mp4
275.690000
so for ...
- 72.8k
80
votes
How can I reduce a video's size with ffmpeg?
Note that it seems that ffmpeg already performs some optimization when ran without options, so before trying to use settings you don't understand or deciding to explicitly lose information, give a try ...
- 2,836
77
votes
Re-encoding video library in x265 (HEVC) with no quality loss
From my own experience, if you want absolutely no loss in quality, --lossless is what you are looking for.
Not sure about avconv but the command you typed looks identical to what I do with FFmpeg. In ...
- 919
72
votes
Accepted
Merge two video clips into one, placing them next to each other
ffmpeg \
-i input1.mp4 \
-i input2.mp4 \
-filter_complex '[0:v]pad=iw*2:ih[int];[int][1:v]overlay=W/2:0[vid]' \
-map '[vid]' \
-c:v libx264 \
-crf 23 \
-preset veryfast \
output.mp4
...
- 7,202
60
votes
How can I reduce a video's size with ffmpeg?
Unless you're looking for a specific bit rate, I'd recommend the -crf option.
This is most commonly used for x264 encoding as described in this article.
In short: a constant rate factor (CRF) of 23 ...
- 767
52
votes
How to do I convert an animated gif to an mp4 or mv4 on the command line?
In my case, using ffmpeg directly did the trick and provided the best result:
$ ffmpeg -f gif -i infile.gif outfile.mp4
- 1,021
44
votes
Accepted
Get metadata from a video in the terminal
On a Debian-based system (but presumably, other distributions will also have mediainfo in their repositories):
$ sudo apt-get install mediainfo
$ mediainfo foo.mp4
That will spew out a lot of ...
- 215k
37
votes
Accepted
Command to extract audio from video without conversion
ffmpeg -i video.mp4 -vn -acodec copy audio.aac
Here’s a short explanation on what every parameter does:
-i option specifies the input file.
-vn option is used to skip the video part.
-acodec copy ...
- 3,629
35
votes
How to extract images from video file?
Try with ffmpeg
ffmpeg -i inputfile.avi -r 1 -f image2 image-%3d.jpeg
You can read the documentation here
-i inputfile.avi The video input file is inputfile.avi
-r 1 extract 1 image per second of ...
- 3,804
34
votes
Get metadata from a video in the terminal
You can use exiftool. To install it run:
sudo apt-get install libimage-exiftool-perl
Then to get the metadata from mp4 file run:
exiftool video_file.mp4 > medatata.txt
The output saved in the ...
- 3,007
32
votes
Merge two video clips into one, placing them next to each other
This can be done with just two filters and the audio from both inputs will also be included.
ffmpeg -i left.mp4 -i right.mp4 -filter_complex \
"[0:v][1:v]hstack=inputs=2[v]; \
[0:a][1:a]amerge[a]" \
...
- 884
28
votes
How do I watch my webcams feed on Linux?
guvcview
This program is ideal for screencasts, as it can show just the camera on a window and nothing else:
sudo apt-get install guvcview
guvcview
Then just use any screen recorder to make a feed. ...
28
votes
Convert a video to a fixed screen size by cropping and resizing
ffmpeg -i input.file -vf "scale=(iw*sar)*max(720/(iw*sar)\,480/ih):ih*max(720/(iw*sar)\,480/ih), crop=720:480" -c:v mpeg4 -vtag XVID -q:v 4 -c:a libmp3lame -q:a 4 output.avi
Replace "input.file" with ...
- 381
25
votes
Can I pipe /dev/video over ssh
If you have a low bandwidth I recommend compression of the video stream (still works in 2020).
with ffmpeg and mplayer
ssh USERNAME@REMOTEHOST ffmpeg -an -f video4linux2 -s 640x480 -i /dev/video0 -r ...
- 15.9k
24
votes
Accepted
How to recover a broken mp4 file: moov atom not found
You can try and use Untrunc to fix the file.
Restore a damaged (truncated) mp4, m4v, mov, 3gp video. Provided you
have a similar not broken video.
you may need to compile it from source, but ...
- 3,628
23
votes
Convert OGV video to GIF animation?
Simple script with good quality
Script:
inputFile=$1
FPS=15
WIDTH=320
#Generate palette for better quality
ffmpeg -i $inputFile -vf fps=$FPS,scale=$WIDTH:-1:flags=lanczos,palettegen tmp_palette....
- 333
23
votes
Accepted
Convert a video to a fixed screen size by cropping and resizing
I'm no ffmpeg guru, but this should do the trick.
First of all, you can get the size of input video like this:
ffprobe -v error -of flat=s=_ -select_streams v:0 -show_entries stream=height,width in....
- 3,188
23
votes
Accepted
Multiple /dev/video for one physical device
The second device provides metadata about the video data from the first device. The new devices were introduced by this patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/...
- 348
19
votes
Fast tool to generate thumbnail video galleries for command line
I like using an easy to use unix command line bash script called VCS - Video Contact Sheet. Their official page: http://p.outlyer.net/vcs/
Its a lot easier to use even easier than a GUI
''It is a ...
- 191
18
votes
How to set the resolution in text consoles (troubleshoot when any `vga=...` fails)
For newer Debian & Ubuntu distros using nvidia, I had to do the following:
First, edit /etc/default/grub. Change the following line:
#GRUB_GFXMODE=640x480
to this:
GRUB_GFXMODE=1280x800
...
- 1,392
18
votes
How do I watch my webcams feed on Linux?
ffplay /dev/video0 is one of the simpler methods, and will work provided you have ffmpeg installed.
To install, use sudo apt install ffmpeg.
- 181
18
votes
How can I list the available video modes for my screen?
Have you tried "xrandr" ?
When run without any option, xrandr shows the names of different outputs available on the system (LVDS, VGA-0, etc.) and resolutions available on each
Demo output :*
...
- 413
17
votes
Get metadata from a video in the terminal
You can do this with the FFmpeg project:
ffprobe -hide_banner 'Yagya (IS) - Topic-Choose-Hlw4YohQzr4.webm'
Result:
Input #0, matroska,webm, from 'Yagya (IS) - Topic-Choose-Hlw4YohQzr4.webm':
...
- 5,652
17
votes
How can I reverse a video clip?
From https://stackoverflow.com/questions/2553448:
Dump all video frames
$ ffmpeg -i input.mkv -an -qscale 1 %06d.jpg
Dump audio
$ ffmpeg -i input.mkv -vn -ac 2 audio.wav
Reverse audio
$ sox -V ...
- 3,013
16
votes
Watch YouTube videos in terminal
So, with Terminology (probably the very best thing that ever happened to a terminal emulator, by the way) at the time of this writing the following works:
ytplay() (
init() if [ "${#1}" -gt ...
- 55.5k
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