mjhjmtu

I have a very strange behaviour with the script below. It executes properly, but after that anything I type at the prompt is recognized, but not displayed. So I can type another command or use the arrow buttons to select one from the history, but the prompt remains empty. If I execute the new, invisible command, the command output is displayed correctly, but the problem remains. Only with a new terminal instance the problem is gone.

#!/bin/bash

getAspect () [[ $line =~ Aspe[ck]t.is.*1.78:1 ]] && echo 2 && break
 [[ $line == "VO: [null]"* ]] && echo 0 && break
 done
 pkill -n mplayer
 )
 return $aspectR # returns 1 (4:3), 2 (16:9) or 0 (no aspect ratio)


getAspect "./NameOfAMovieFile"

I could narrow down the problem to the following:

Using the mplayer output (see below) I inserted another test [[ $line =~ such ]] && echo 9 && break in the loop to sequentially check at which line the problem started.

Result: Line 4 (LIRC). If the test matched any line before, the problem didn't occur, else it did.

Saving the mplayer output to file and replacing mplayer with cat "saved_output" in the function didn't raise the problem.

So where does the error lie?

Is it a bug in the function, mplayer producing some weird output, bash or my terminal programs (tested with Konsole and Yakuake)?

How can I fix this?

# mplayer -vo null -nosound "./NameOfAMovieFile" 2>&1
MPlayer 1.2.r38008-Packman-8 (C) 2000-2017 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing ./NameOfAMovieFile.
libavformat version 58.12.100 (external)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (vorbis), -aid 0, -alang eng
VIDEO: [H264] 1280x720 0bpp 29.970 fps 0.0 kbps ( 0.0 kbyte/s)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 58.18.100 (external)
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Clip info:
 COMPATIBLE_BRANDS: iso6avc1mp41
 MAJOR_BRAND: dash
 MINOR_VERSION: 0
 ENCODER: Lavf57.71.100
Load subtitles in ./
Audio: no sound
Starting playback...
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [null] 1280x720 => 1280x720 Planar YV12 [zoom]
V: 0.0 0/ 0 ??% ??% ??,?% 0 0 [J
V: 0.0 0/ 0 ??% ??% ??,?% 0 0 [J


MPlayer interrupted by signal 2 in module: sleep_timer
V: 3.1 0/ 0 19% 0% 0.0% 0 0 [J

Exiting... (Quit)

My system: OpenSuse TumbleWeed, KDE