Hi all, since I can not get much help on how to get better thumbnails using kodi without accessing websites and getting kodi to generating them I have came up with a batch file that can create them since websites like TVDB don't support high res images.
Roidy posted a site above (TMDB) which does support high res images on alot of shows but not all shows have them and still use low res images but are better than TVDB. Thanks for that by the way
The shows that don't have high res images or have some low images for some episodes you can create your own using the batch file to create them and you could post them on (TMDB) if you wish to support them and others.
You have to create a file called (Thumbnail Generator (00_00_14.435).bat and within that file you have
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@
echo off
set "ffmpeg_bin=D:\thumbs\ffmpeg.exe"
set "out_path=D:\thumbs"
cd /D "D:\thumbs"
for %%f in (*.mkv) do (%ffmpeg_bin% -ss 00:00:14.435 -i "%%~f" -qscale:v 2 -qmin 1 -qmax 1 -vframes 1 "%out_path%\%%~nf-thumb.jpg")
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now I have a few of these bat files as I changed the time stamp and called my 2nd one for eg. (Thumbnail Generator (00_00_28.435).bat so it gets images form a different time stamp 00:00:28.435 to see which turns out best.
You will also notice the path in the batch file is my path on my machine so you will need to make sure that the folder name and location matches the batch file to make it work on your machine. Also it is set for .mkv extension as I use it on MKV files but if you want a different format just change that to what ever extension you want eg. .avi to get thumbs from avi files.
You will also need ffmpeg.exe in the same folder as the batch file and you can get that from the net.
run it and it will generate thumbs from the file or files within that folder at full re so have the video file in there,
you have two options copy the files into the folder with the batch file and ffmpeg to get the thumbs or copy the batch file and ffmpeg file into the same folder as your video files and alter the batch file location folder to match yours before you run it.
I also used this on movies but with movies you get the black bars and I have to put them in photoshop or gimp to remove them, you can create a recording of you removing the black bars which is a step by step recording so you don't have to keep doing it and save It. once you done that every time you do this its a one click process and its all automated. the first time took about 5 min but from now on it takes 2 sec to do each thumbnail to remove the bars and save them.
I have timed myself and I can rip 24 episode thumbs and remove the bars and are already named correctly within 2min and that's not bad at all for full res thumbs.