Very slow video playback required

Everything about X, Gnome, KDE, ... and everything running on it

Very slow video playback required

Postby pcalvert » 2019-01-17 14:40

I'd like to be able to examine videos very closely, frame by frame. Is there a program that would allow me to easily do something like this?:

1. Show the first frame for 3 seconds
2. Jump forward by 10 frames
3. Pause for 3 seconds
4. Jump forward by 10 frames
5. Pause for 3 seconds
6. And so on...

Although I'd prefer to use a Linux program to do this, I will consider Windows (freeware) programs as well.

Phil
“Property is the fruit of labor; property is desirable; it is a positive good
in the world. That some should be rich shows that others may become
rich, and hence is just encouragement to industry and enterprise.”
— Abraham Lincoln
pcalvert
 
Posts: 1818
Joined: 2006-04-21 11:19
Location: Sol Sector

Re: Very slow video playback required

Postby llivv » 2019-01-17 15:25

In memory of Ian Ashley Murdock (1973 - 2015) founder of the Debian project.
User avatar
llivv
 
Posts: 5738
Joined: 2007-02-14 18:10
Location: cold storage

Re: Very slow video playback required

Postby stevepusser » 2019-01-17 17:14

I don't know of any program that can automatically perform those steps you describe, though you may be able to script that action for one. Most players can slow down playback to where they are going frame by frame, and then you can pause to examine one that catches your interest. I I know SMPlayer will allow you to advance frame by frame also. Perhaps the Avidemux video editor will also allow you to do this--it does have a control that allows you to advance and rewind at will. Avidemux has an Appimage, since it's not in the Debian repos, and you have to be careful about adding anything from the deb-multimedia repo.
The MX Linux repositories: Backports galore! If we don't have something, just ask and we'll try--we like challenges. New packages: Flightgear 2018.2.2, 4..20.6 kernel, wine-staging 4.0 final, Sayonara 1.1.1, Calibre 3.39.1, Pale Moon 28.3.1
User avatar
stevepusser
 
Posts: 10510
Joined: 2009-10-06 05:53

Re: Very slow video playback required

Postby bw123 » 2019-01-17 17:45

Pretty fun, play with this?
Code: Select all
$ vlc --antiflicker-softening-size 10  --rate .025 Lews\ Mach\ II\ Speed\ Spin\ Series.mp4


rate .00000000001 seems to be around 1 sec, don't know how low it goes? Don't different formats have different fps? Not sure how you could calculate exactly ten frames every 3 sec.
User avatar
bw123
 
Posts: 3751
Joined: 2011-05-09 06:02
Location: TN_USA

Re: Very slow video playback required

Postby Bulkley » 2019-01-17 18:12

Frame by frame in the digital world? How does that work? In the days of film movies were made by taking a series of pictures and playing them back frame by frame (hence the term movie). Does digital mimic that?

As to the OP's question, slowing down playback and hitting pause is probably what he will end up doing.
Bulkley
 
Posts: 5723
Joined: 2006-02-11 18:35

Re: Very slow video playback required

Postby bw123 » 2019-01-17 18:23

mpv --speed=0.01 seems to be around 3sec?
User avatar
bw123
 
Posts: 3751
Joined: 2011-05-09 06:02
Location: TN_USA

Re: Very slow video playback required

Postby Head_on_a_Stick » 2019-01-17 18:29

Bulkley wrote:In the days of film movies were made by taking a series of pictures and playing them back frame by frame (hence the term movie). Does digital mimic that?

Yes :)

For example, if you have some individual frames named image_x.png (where x is a number) then you can use this to make a movie from them:
Code: Select all
ffmpeg -i image_%d.png movie.mp4

(Sorry for the OT, OP.)
"The trouble with the world is that the stupid are cocksure and the intelligent full of doubt." — Bertrand Russell
User avatar
Head_on_a_Stick
 
Posts: 8838
Joined: 2014-06-01 17:46
Location: /dev/chair

Re: Very slow video playback required

Postby pcalvert » 2019-01-21 14:20

Thank you for the suggestions!

Phil
“Property is the fruit of labor; property is desirable; it is a positive good
in the world. That some should be rich shows that others may become
rich, and hence is just encouragement to industry and enterprise.”
— Abraham Lincoln
pcalvert
 
Posts: 1818
Joined: 2006-04-21 11:19
Location: Sol Sector


Return to Desktop & Multimedia

Who is online

Users browsing this forum: piper and 5 guests

fashionable