after 4.8.0.80 thumbnails are not generated anymore

[GravityRZ 2]

before 4.8.0.80 i could add mp4 movies in a folder and it was recognised and a thumbnail was generated

now in 4.8.0.80 it is not working anymore

i can scan libraries, refresh metadata but no main thumbnail is added

 

[Happy2Play 8282]

Probably need to see the server log for this item Refresh.

Have you verified the Library settings has Image Capture enabled?

[GravityRZ 2]

now that was good info. thanks for your help

i checked everything but not that setting because i had to scroll all the way down.

all my videos have thumbnails installed(by using previous version) so obviously the setting was on.

strange that it was turned off after the upgrade

 

 

[GravityRZ 2]

ok spoke to soon

it is generating a thumbnail but only one with a really small size 600x336

normally it should generate a thumbnail with the size of the video resolution 3840x2160

any idea why it is down that

 

Edited February 6 by GravityRZ

[Luke 37067]

6 minutes ago, GravityRZ said:

ok spoke to soon

it is generating a thumbnail but only one with a really small size 600x336

normally it should generate a thumbnail with the size of the video resolution 3840x2160

any idea why it is down that

 

If the video has an embedded image, then we use that, so that could be where that's from.

[Happy2Play 8282]

@Lukedid something change in the image quality/resolution here?

"scale=trunc(min(max(iw\,ih*dar)\,600)/2)*2:trunc(ow/dar/2)*2,thumbnail=24"

As copying the same file that has a 1920x1080 image now gets same as above 600x336.  Same with deleting current image and refreshing gets lower resolution image.

[GravityRZ 2]

that is exactly my problem. the old movie had 3840x2160, after refresh it's 600x336

you will notice this when you display it on a tv screen.

this thumbnail image is also used as background and believe me 600x336 does not look good on a 4k tv

 

[Luke 37067]

Possibly, yes. But you don't need this extracted at 4K as Emby will never display it at that size. This thumbnail is only needed for display in lists and so if you extract at 4K then it's just going to cause more work for the server to constantly have to downsize to smaller sizes.

[GravityRZ 2]

13 minutes ago, Luke said:

Possibly, yes. But you don't need this extracted at 4K as Emby will never display it at that size. This thumbnail is only needed for display in lists and so if you extract at 4K then it's just going to cause more work for the server to constantly have to downsize to smaller sizes.

apparently it is being used for more than that

on appletv it is also used and background poster which really looks nice. the new functionality broke that 

since it is generated automatically it saves you a lot of time adding your own posters(which do not exist on home videos)

Edited February 6 by GravityRZ

[Luke 37067]

OK forgot about that. We can look at removing the limit but just to answer the original question, it's not a new change. We've had that 600 limit in place for years.

[Happy2Play 8282]

6 minutes ago, Luke said:

We've had that 600 limit in place for years.

Interesting as all my test items have images same resolution as video.

[Luke 37067]

Just now, Happy2Play said:

Interesting as all my test items have images same resolution as video.

Well I didn't look back forever but it's been in the code for at least 3-4 years. 

[GravityRZ 2]

5 minutes ago, Luke said:

Well I didn't look back forever but it's been in the code for at least 3-4 years. 

Negative

 

i just recently started using emby about a month ago

all my thumbnails have the same size as the movies

i was using previous version 4.7.14 i believe

i checked both my photo and video folder and they all have thumbnails as big as the original size

the thumbnail is saved as primary, the rest is empty

[Luke 37067]

it's not a new change i can assure. But we can look at removing the limit.

[GravityRZ 2]

3 minutes ago, Luke said:

it's not a new change i can assure. But we can look at removing the limit.

that scares me because obviously if the limit was in place or not it was saving thumbnails with the size of the original image/video.

we got this confirmed from 2 different users(me and Happy2Play)

could it be that the limit was in place but was not working for the home video &Photo's library? 

 

 

 

[Luke 37067]

There are multiple techniques for extraction depending on the format of the video, so it's possible that not all of them have this limit.

[Happy2Play 8282]

yes I can confirm 4.7 and 4.8 have different behavior when it comes to these extracted images.

But the extraction code is the same on both so is has to be somewhere in the save process.

 

[GravityRZ 2]

ok

mkv, mp4, iso and jpg seem to use the original size(before the update)

 

[GravityRZ 2]

just aded something to think about

 

when i was running 4.7.14(the latest version before 4.8.0.80) the image capture  switch was off but it still created thumbnails the size of the resoloution of the photo/video.

then i switched to 4.8.0.80, added a movie just to find out no thumbnail image was created anymore

could it be that thumbnail extraction in the old release was done with high resolution when the switch was off and low res(600x336) when the swich was on and that they fixed this bug.

eg:in the new version no thumbnsail is created when the switch is off and 600x336 when the switch is on.

this would explain that the 600x336 is in place for a long time(but was not honoured when the switch was off)

anyway if you have a beta release to test let me know (synology X64)