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

[Micael Silva]

On Wed, 29 Jan 2020, 08:53 Michael Koch, <astroelectronic at t-online.de>
wrote:

> 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%
>
>
>
> ffmpeg and ffplay natively works with bitmap subtitles format. Subrip will
> not work unless thru a filter that renders it, which is out of scope of the
> "t" shortcut