TV Thumbnailer - Custom Rec TV Thumbs / Better h264 support (1 Viewer)

[morpheus_xx]

I had some small tests with ffmpeg as well and it will be used as an additional thumbnail creator for MP2 as well (default uses Windows-shell thumbnail features).

I have many recordings stored in anamorphic format and want to get the image in proper 16:9 format (no tiling wanted at all). So I used video filters to scale the output according to the sample aspect ratio. I've added also a deinterlace filter:

ffmpeg.... -vf "yadif=0:-1:0","scale=iw*sar:ih","setsar=1:1","scale=iw/2:-1"

the 2nd scale command does resize the corrected frame to 1/2 of input size.

Maybe this can be useful for your needs as well, so I let you know this

 

[Jay_UK]

Now that is just showing off

J.

 

[kiwijunglist]

Thanks using this now, much better screenshots. most of the interlacing has gone.

 

[Holzi]

I have tested this and it works just great! Thank you for your ongoing work! =)

What I am missing now is to have thumbnails with multiple images combined. But I don't know if this is even possible with ffmpeg.

 

[kiwijunglist]

yes it's possible. not sure with ffmpeg, but there is a tool called imagemagick that can montage and overlay images. Jay UK is using it already with his mtn replacement a few posts up. I will be doing this to, i already know how to do it, but I don't a smart way to decide at which timestamps to take the screen shots from in a video.[DOUBLEPOST=1351762019][/DOUBLEPOST]I assume I can use ffmpeg to return the video length and then calculate something based on that, but i'm not sure if it could be done a better way within the ffmpeg switch. Also there is the issue of getting all 4 screenshots done with one commandline of ffmpeg vs doing it four times which may take a lot longer.

 

[morpheus_xx]

tiling images into one single is supported by ffmpeg itself: http://ffmpeg.org/trac/ffmpeg/wiki/How to take multiple screenshots to an image (tile, mosaic)

(although I don't like it and won't use it in MP2 )

 

[kiwijunglist]

you don't like mosaic thumbnails? or you don't like the way it tiles?

 

[Jay_UK]

Hi there,

FFmpeg does support thumbnailing itself and and you can specify the interval, etc. The slight issue is limiting the number of thumbs it grabs.

I'm sure I could figure it out.... I ended up with two situations:

A tiled thumb based on consequective frames (when I want a gap between them)
Thumbnail generation running for the whole movie (grabbing with the required gaps, but not stopping once I'd generated a tiled thumb)

All I need to do is combine the above two to get the ideal.... FFmpeg generating a single tiled thumb with a specified gap between the frames.

But if you want the "extras" - such as show name/banner/etc, then it would be best sticking with ImageMagic.

J.

 

[kiwijunglist]

Yup I'm struggling to get it to tile as well, it gets stuck where it keeps echo the same line with 0 kbp/s bitrate. I probably will stay with imagemagick as that is something i used before to make a mod for the dvdart scraper - https://forum.team-mediaportal.com/...ictures-collection.112847/page-10#post-923698

 

[Jay_UK]

Hi there,

A quick update to my mtn.exe.

Please refer to my previous post about installation instructions:

Install ImageMagic
Replace MTN with my version
Put FFMpeg in the same directory as MTN

Changes
Now has logic to handle short movies/recordings
Slightly tweaked thumbnailing
Improved frame grabbing (for interlaced material)

J.