[FFmpeg-user] FFplay toggle subtitles on / off?

[Michael Koch]

Does FFplay have a keyboard shortcut to toggle the subtitles on / off 
while playing?
In the documentation I found only "t" for cycling the subtitle channel.
I'm asking because I have a MP4 file with subtitles, created with FFmpeg.
The subtitles are visible in VLC player, but not in FFplay.

Below is the console output.

C:\Users\mKoch\Desktop>c:\ffmpeg\ffmpeg -i test.mp4 -i subtitle.srt -c:v 
copy -c
:a copy -c:s mov_text -metadata:s:s:0 language=ger -y out2.mp4
ffmpeg version git-2020-01-26-5e62100 Copyright (c) 2000-2020 the FFmpeg 
develop
ers
   built with gcc 9.2.1 (GCC) 20200122
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d 
--enable-libb
luray --enable-libfreetype --enable-libmp3lame 
--enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
--enable-libshine --e
nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame 
--enable
-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 
--enable-libx265 -
-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib 
--enable-gmp --enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc 
--enable-libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx 
--enable-ffnvcode
c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec 
--enable-dxva2 -
-enable-avisynth --enable-libopenmpt --enable-amf
   libavutil      56. 38.100 / 56. 38.100
   libavcodec     58. 67.100 / 58. 67.100
   libavformat    58. 36.100 / 58. 36.100
   libavdevice    58.  9.103 / 58.  9.103
   libavfilter     7. 71.100 /  7. 71.100
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.35.102
   Duration: 00:00:06.57, start: 0.000000, bitrate: 12352 kb/s
     Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 
0x7634706D), yuv420p
, 1920x1080 [SAR 1:1 DAR 16:9], 12216 kb/s, 30 fps, 30 tbr, 15360 tbn, 
30 tbc (d
efault)
     Metadata:
       handler_name    : VideoHandler
       timecode        : 03:47:26:21
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 
stereo, flt
p, 128 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
     Metadata:
       handler_name    : TimeCodeHandler
       timecode        : 03:47:26:21
Input #1, srt, from 'subtitle.srt':
   Duration: N/A, bitrate: N/A
     Stream #1:0: Subtitle: subrip
Output #0, mp4, to 'out2.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.36.100
     Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 
0x7634706D), yuv420p
, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 12216 kb/s, 0.03 fps, 30 tbr, 
15360 tbn,
  15360 tbc (default)
     Metadata:
       handler_name    : VideoHandler
       timecode        : 03:47:26:21
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 
stereo, flt
p, 128 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
     Stream #0:2(ger): Subtitle: mov_text (tx3g / 0x67337874)
     Metadata:
       encoder         : Lavc58.67.100 mov_text
Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
   Stream #1:0 -> #0:2 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
frame=  197 fps=0.0 q=-1.0 Lsize=    9903kB time=00:00:06.53 
bitrate=12417.0kbit
s/s speed=69.8x
video:9793kB audio:102kB subtitle:0kB other streams:0kB global 
headers:0kB muxin
g overhead: 0.080009%