Decoder (codec none) not found for input stream

Plex Media Server
, ,
21

ffmpeg -i codecs | grep -i webvtt will do it all too.

[chuck@lizum Lucy (2014).524]$ ffmpeg -i lucy.forced.srt lucy.converted.vtt
ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, srt, from 'lucy.forced.srt':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Subtitle: subrip
Output #0, webvtt, to 'lucy.converted.vtt':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Subtitle: webvtt
    Metadata:
      encoder         : Lavc58.54.100 webvtt
Stream mapping:
  Stream #0:0 -> #0:0 (subrip (srt) -> webvtt (native))
Press [q] to stop, [?] for help
size=       3kB time=01:21:00.48 bitrate=   0.0kbits/s speed=3.93e+06x    
video:0kB audio:0kB subtitle:1kB other streams:0kB global headers:0kB muxing overhead: 125.168541%
[chuck@lizum Lucy (2014).525]$

comparing differences shows:

[chuck@lizum Lucy (2014).527]$ head -10 lucy.forced.srt 
565
00:48:38,542 --> 00:48:39,543
Del Rio.

566
00:48:40,669 --> 00:48:42,295
I've got a weird call
from a US citizen in Taiwan.

567
[chuck@lizum Lucy (2014).528]$ head -10 lucy.converted.vtt 
WEBVTT

48:38.542 --> 48:39.543
Del Rio.

48:40.669 --> 48:42.295
I've got a weird call
from a US citizen in Taiwan.

48:42.504 --> 48:45.882
[chuck@lizum Lucy (2014).529]$

EDIT: looking to see if there is an upstream FFMPEG problem with embedded XML in subtitle files.

22

You’re probably right :slight_smile:

The fact the subtitles show as English forced (NONE) is weird in itself so there’s probably something not quite right with the files.

Thanks again for all the help!

23

Those are something Netflix uses. It is not WebVTT. Whoever extracted those subtitles didn’t do it right.

24

As in, I didn’t extract them properly with the below command or the original media itself is “corrupted”?

mkvextract tracks Emily.in.Paris.S01E05.1080p.WEB.H264-CAKES.mkv 2:sub.vtt
25

I mean those subtitles were taken from Netflix and then added to the mkv file. When they were taken from Netflix, they were not done correctly. However you got that file, it was bad to begin with.

26

Huh OK, thank you both for all the help - I really appreciate it.

I’ll have to reach out to the person who gave it to me and see if they can redo whatever they messed up last time.

27

Looks like maybe the English one is ok so you can remux the file yourself to remove those bad subtitles.

28

Looks like maybe the English one is ok so you can remux the file yourself to remove those bad subtitles.

I’m not really sure what that means, to be honest :upside_down_face:

29

@sim

You will need to use the graphical Mkvtoolnix tool.

sudo apt install mkvtoolnix mkvtoolnix-gui

If using Windows or Mac, adjust the name for that OS package manager.

  1. Copy the file to the computer where you will work on it.
  2. Drag the file into the upper window pane
  3. uncheck those you do not want.
  4. Verify where the output file will go
  5. Start the job. (start multiplexing)
  6. Wait for it to show (lower right) 100% completion

Screenshot from 2020-11-07 15-10-19
Screenshot from 2020-11-07 15-10-19908×551 60.9 KB

Screenshot from 2020-11-07 15-13-24
Screenshot from 2020-11-07 15-13-241192×120 33 KB

7. When complete, test the output file with VLC or other player

  1. Further, use FFMPEG -i to verify the contents
  2. When happy with the results, replace the original file.
30

Ah I see what you meant, sorry.

The English subtitle was the one I had selected and was causing all the trouble, I ended up downloading the subtitles from Opensubtitles and the media played fine.

I appreciate all the help.

31

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