Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Using the Lazarus IDE
»
General
»
TProcess ffmpeg freezes
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
Doubts about Lazarus IDE ...
by
Javier_43
[
Today
at 08:08:34 pm]
IDE doubts
by
VisualLab
[
Today
at 08:06:43 pm]
Add Artificial Intelligen...
by
marcov
[
Today
at 07:59:05 pm]
problem with floats when ...
by
dpap
[
Today
at 07:51:36 pm]
TaChart how to draw buffe...
by
wp
[
Today
at 07:30:21 pm]
Isn't "Call stack" dockab...
by
dpap
[
Today
at 07:26:09 pm]
Lazarus Portable image fi...
by
benjamimgois
[
Today
at 07:23:53 pm]
Treeview: full-width back...
by
wp
[
Today
at 06:47:39 pm]
New release of StrumPract
by
Fred vS
[
Today
at 04:52:40 pm]
Converting a Project from...
by
1HuntnMan
[
Today
at 04:30:20 pm]
SFTP Connection
by
rvk
[
Today
at 04:29:45 pm]
Print GroupBox contents
by
GalZoli
[
Today
at 04:28:49 pm]
Circular unit reference b...
by
Martin_fr
[
Today
at 03:56:45 pm]
how to use SetSysColors?
by
robert rozee
[
Today
at 03:46:24 pm]
UADE Library
by
Guva
[
Today
at 02:54:05 pm]
[SOLVED] JvCLlaz - Duplic...
by
1HuntnMan
[
Today
at 02:53:20 pm]
fv on macOS M3
by
bnl
[
Today
at 01:55:01 pm]
Length of String is not f...
by
MarkMLl
[
Today
at 01:51:47 pm]
Distance measurments
by
Thaddy
[
Today
at 01:49:19 pm]
AutoFormat IDE plugin
by
fifr
[
Today
at 01:24:50 pm]
[Solved] RxDBGrid bug
by
lainz
[
Today
at 01:20:15 pm]
Generic function is 'wrea...
by
cdbc
[
Today
at 12:22:15 pm]
fpspreadsheet (Spready) -...
by
tatamata
[
Today
at 12:17:03 pm]
Is there a way to emphasi...
by
cdbc
[
Today
at 11:59:34 am]
SnapTRAINER
by
fozkan
[
Today
at 11:52:01 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: TProcess ffmpeg freezes (Read 1192 times)
domasz
Hero Member
Posts: 554
TProcess ffmpeg freezes
«
on:
August 07, 2024, 05:49:45 pm »
I just want to save first frame from MP4 file as PNG. The same code works fine for other programs (like imagemagick) but for some reason ffmpeg freezes. When I run the command normally (from cmd) ffmpeg doesn't wait for enter or any other key, just exits.
Code: Pascal
[Select]
[+]
[-]
Proc
:
=
TProcess
.
Create
(
nil
)
;
Proc
.
CommandLine
:
=
'ffmpeg -i "input.mp4" -vframes 1 thumb.png'
;
Proc
.
Options
:
=
[
poWaitOnExit
]
;
// Proc.ShowWindow := swoHIDE;
Proc
.
Execute
;
Proc
.
Free
;
«
Last Edit: August 07, 2024, 06:03:30 pm by domasz
»
Logged
Hartmut
Hero Member
Posts: 891
Re: TProcess ffmpeg freezes
«
Reply #1 on:
August 07, 2024, 06:00:26 pm »
try "ffmpeg" instead of "fmpeg" in line 2
Logged
domasz
Hero Member
Posts: 554
Re: TProcess ffmpeg freezes
«
Reply #2 on:
August 07, 2024, 06:03:22 pm »
Thanks, but that's not the problem.
Logged
Hartmut
Hero Member
Posts: 891
Re: TProcess ffmpeg freezes
«
Reply #3 on:
August 07, 2024, 06:06:56 pm »
Did you set the correct working dir?
Maybe you must specify the path to ffmpeg.
Which OS do you use?
«
Last Edit: August 07, 2024, 06:08:29 pm by Hartmut
»
Logged
domasz
Hero Member
Posts: 554
Re: TProcess ffmpeg freezes
«
Reply #4 on:
August 07, 2024, 06:18:09 pm »
All dirs are fine. Ffmpeg does launch just fine, it loads the correct file. It just doesn't quit on it's own.
OS: Windows 10.
Logged
Hartmut
Hero Member
Posts: 891
Re: TProcess ffmpeg freezes
«
Reply #5 on:
August 07, 2024, 06:27:05 pm »
That means, file "thumb.png" is correctly created and
after
that ffmpeg hangs?
If file "thumb.png" already exists, than it can be that ffmpeg asks if to overwrite it. This can be suppressed with parameter -y
Logged
BildatBoffin
New Member
Posts: 32
Re: TProcess ffmpeg freezes
«
Reply #6 on:
August 07, 2024, 06:30:56 pm »
In case you are piping you must consume stdout. Does not seem to be the case here tho.
Logged
-
https://gitlab.com/basile.b
-
https://gitlab.com/styx-lang/styx
domasz
Hero Member
Posts: 554
Re: TProcess ffmpeg freezes
«
Reply #7 on:
August 07, 2024, 06:50:32 pm »
Sorry guys. You are all right and the code does work. I had a problem somewhere (kinda) else.
Before I try to convert with ffmpeg I try with imagemagick. And imagemagick found ffmpeg.exe and tried to convert the file with ffmpeg and froze, for some reason. I renamed ffmpeg to ffmpeg2 and now it works nicely.
Logged
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Using the Lazarus IDE
»
General
»
TProcess ffmpeg freezes
TinyPortal
© 2005-2018