Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Programming
»
General
»
[Solved] Process pipe error
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
IRC channel
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
Controlling the behavior ...
by
rvk
[
Today
at 08:31:48 am]
A "leisure" question on W...
by
Awkward
[
Today
at 07:59:12 am]
Curling Pythagoras Tree: ...
by
AlexTP
[
Today
at 07:45:46 am]
Free AI to use in local
by
Thaddy
[
Today
at 07:36:24 am]
Big Numbers Math
by
Thaddy
[
Today
at 07:22:49 am]
how to change the color f...
by
Thaddy
[
Today
at 07:14:33 am]
Parquet?
by
Thaddy
[
Today
at 07:11:17 am]
STARS and Regular POLYGON...
by
Boleeman
[
Today
at 06:41:41 am]
Offical launch of the 1 B...
by
Gustavo 'Gus' Carreno
[
Today
at 05:53:09 am]
Project fails on run but ...
by
jamie
[
Today
at 12:54:49 am]
Ribbon bar in Lazarus 3.2...
by
wp
[March 28, 2024, 11:29:17 pm]
how to search in rxmemory...
by
rcmz
[March 28, 2024, 10:19:54 pm]
Configure JCF messages
by
GordonFindlay
[March 28, 2024, 10:16:19 pm]
Poll: Watches and Display...
by
Martin_fr
[March 28, 2024, 10:15:08 pm]
Dialog ShowModal and an i...
by
d7_2_laz
[March 28, 2024, 09:51:39 pm]
JEDI error but unit compi...
by
Thaddy
[March 28, 2024, 09:30:33 pm]
Understanding and adjusti...
by
circular
[March 28, 2024, 09:09:56 pm]
Dynarray initialization p...
by
Thaddy
[March 28, 2024, 06:30:12 pm]
Zeos components. Had to c...
by
Fantablup
[March 28, 2024, 04:17:13 pm]
[SOLVED] Completion box s...
by
furious programming
[March 28, 2024, 04:12:26 pm]
[LAMW] How to create a ca...
by
af0815
[March 28, 2024, 03:48:16 pm]
Complex package installat...
by
wp
[March 28, 2024, 03:38:16 pm]
[SOLVED] Combined pointer...
by
CM630
[March 28, 2024, 02:48:41 pm]
Using KeyPress event, how...
by
Zvoni
[March 28, 2024, 02:24:42 pm]
a Unit problem?
by
Thaddy
[March 28, 2024, 01:56:12 pm]
« previous
next »
Print
Pages: [
1
]
Author
Topic: [Solved] Process pipe error (Read 711 times)
nikel
Full Member
Posts: 186
[Solved] Process pipe error
«
on:
September 22, 2020, 03:16:30 pm »
Hello, I'm trying to get some tags from mp3's, here's my code:
Code: Pascal
[Select]
[+]
[-]
Path
:
=
P
;
TempStringlist
:
=
TStringList
.
Create
;
AProcess
:
=
TProcess
.
Create
(
nil
)
;
AProcess
.
Executable
:
=
'/bin/sh'
;
// /bin/bash
AProcess
.
Parameters
.
Add
(
'-c'
)
;
AProcess
.
Parameters
.
Add
(
'ffprobe -loglevel error -show_entries format_tags='
+
Request
+
' -of default=noprint_wrappers=1:nokey=1 '
+
Path
)
;
AProcess
.
Options
:
=
AProcess
.
Options
+
[
poWaitOnExit
,
poUsePipes
]
;
AProcess
.
Execute
;
I'm getting pipe error on some songs. Why does it happen?
«
Last Edit: September 22, 2020, 05:15:36 pm by nikel
»
Logged
winni
Hero Member
Posts: 3197
Re: Process pipe error
«
Reply #1 on:
September 22, 2020, 03:38:19 pm »
Hi!
I have just no Lazarus at hand.
But as I remember the size of the pipe is 1024 bytes.
Do some tags break this limit?
Winni
Logged
marcov
Administrator
Hero Member
Posts: 11383
FPC developer.
Re: Process pipe error
«
Reply #2 on:
September 22, 2020, 03:40:30 pm »
Do you implement the so called long output scenario? This is always recommended when there are problems.
Or use runcommand, which implements this scenario.
Logged
nikel
Full Member
Posts: 186
Re: Process pipe error
«
Reply #3 on:
September 22, 2020, 04:55:58 pm »
Thanks for the replies. How can I implement scenario, it's a console application.
Logged
marcov
Administrator
Hero Member
Posts: 11383
FPC developer.
Re: Process pipe error
«
Reply #4 on:
September 22, 2020, 04:57:46 pm »
https://wiki.freepascal.org/Executing_External_Programs#Reading_large_output
or easier
https://wiki.freepascal.org/Executing_External_Programs#.28Process..29RunCommand
Logged
nikel
Full Member
Posts: 186
Re: Process pipe error
«
Reply #5 on:
September 22, 2020, 05:15:19 pm »
This worked fine
Code: Pascal
[Select]
[+]
[-]
Path
:
=
P
;
if
RunCommand
(
'/bin/bash'
,
[
'-c'
,
'ffprobe -loglevel error -show_entries format_tags='
+
Request
+
' -of default=noprint_wrappers=1:nokey=1 '
+
'"'
+
Path
+
'"'
]
,
Str
)
then
writeln
(
Str
)
;
Result
:
=
Str
;
Logged
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Programming
»
General
»
[Solved] Process pipe error
TinyPortal
© 2005-2018