Thumbprints of video files are pixeled

Hi there,

I have a Vero4K+ with a fresh install of 2019.07-1. I added a local folder with video files (NFS mount, mounted with autofs). When selecting a subfolder, all mkv files in that folder are listed. When I scroll down to a file, a thumbprint of the video file is automatically generated and displayed left of the filename.

It happens very often, that those thumbprints contain big pixels which do not belong to the actual screenshot of the video. When this first happened I thought this would be related to lots of traffic on my local network which led to OSMC accessing the files too slow. But today there was no traffic at all. Vero4K+ is connected to Gigabit ethernet and iperf3 showed not problems.

I think I did not have those pixeled thumprints before. Anybody know why this is happening?

Best regards,
cyb

Can you isolate a difference between what kinds of files have the bad thumbnail and which don’t, or is it just random? Can you provide a screenshot.

Can you show us a picture so we can see the issue you describe?

Sam

This sounds similar to (possibly the same as) a problem I’ve had for a while. It affects videos that aren’t correctly picked up by the scraper, so Kodi is displaying a thumbnail extracted from the video rather than the normal “poster” art - but it doesn’t affect all thumbnails, only some.

See screenshots: Mystery Men looks fine, but The Name of the Rose is corrupt.

I’ll post MediaInfo for those two files in a moment.

Mystery Men:

General
Unique ID                                : 245763026721048128415845519727668589264 (0xB8E43CBBAA12B30AA86446E22D6172D0)
Complete name                            : F:\Video\2D Films\Mystery Men (1999).mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 8.28 GiB
Duration                                 : 2 h 1 min
Overall bit rate                         : 9 759 kb/s
Movie name                               : Mystery.Men.1999.1080p.BluRay.x264.DTS-FGT
Encoded date                             : UTC 2015-12-28 12:22:20
Writing application                      : mkvmerge v8.3.0 ('Over the Horizon') 64bit
Writing library                          : libebml v1.3.1 + libmatroska v1.4.2
Cover                                    : Yes
Attachments                              : cover_land.jpg / small_cover.jpg / small_cover_land.jpg / cover.jpg

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2 h 1 min
Bit rate                                 : 8 056 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 040 pixels
Display aspect ratio                     : 1.85:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.168
Stream size                              : 6.83 GiB (83%)
Writing library                          : x264 core 130 r2273 b3065e6
Encoding settings                        : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default                                  : Yes
Forced                                   : No

Audio
ID                                       : 2
Format                                   : DTS
Format/Info                              : Digital Theater Systems
Codec ID                                 : A_DTS
Duration                                 : 2 h 1 min
Bit rate mode                            : Constant
Bit rate                                 : 1 509 kb/s
Channel(s)                               : 6 channels
Channel layout                           : C L R Ls Rs LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 93.750 FPS (512 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossy
Stream size                              : 1.28 GiB (15%)
Language                                 : English
Default                                  : Yes
Forced                                   : No

The Name of the Rose:

General
Unique ID                                : 237416276280559998651133492879132738028 (0xB29CB629EF247981AE6ABF6AD6CC41EC)
Complete name                            : F:\Video\2D Films\The Name of The Rose (1986).mkv
Format                                   : Matroska
Format version                           : Version 2
File size                                : 22.9 GiB
Duration                                 : 2 h 11 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 25.0 Mb/s
Movie name                               : The.Name.of.The.Rose.1986.1080p.Bluray.AVC.Remux
Encoded date                             : UTC 2011-08-16 19:49:25
Writing application                      : mkvmerge v4.9.1 ('Ich will') сборка от Jul 11 2011 23:53:15
Writing library                          : libebml v1.2.1 + libmatroska v1.1.1

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Format settings, GOP                     : M=1, N=10
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2 h 11 min
Bit rate mode                            : Variable
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Title                                    : uralmix
Default                                  : Yes
Forced                                   : No

Audio #1
ID                                       : 2
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 448 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 421 MiB (2%)
Title                                    : Амальгама
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : Yes
Forced                                   : No

Audio #2
ID                                       : 3
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 384 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 361 MiB (2%)
Title                                    : Киномания
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #3
ID                                       : 4
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Title                                    : ТВЦ (ТВ3)
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #4
ID                                       : 5
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Title                                    : ОРТ
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #5
ID                                       : 6
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Title                                    : дубляж
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #6
ID                                       : 7
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Title                                    : авторский - Юрий Сербин
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #7
ID                                       : 8
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Title                                    : авторский - Ирэн
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #8
ID                                       : 9
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 448 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 421 MiB (2%)
Title                                    : Валерий Огородников
Language                                 : Russian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Audio #9
ID                                       : 10
Format                                   : DTS XLL
Format/Info                              : Digital Theater Systems
Commercial name                          : DTS-HD Master Audio
Codec ID                                 : A_DTS
Duration                                 : 2 h 11 min
Bit rate mode                            : Variable
Channel(s)                               : 6 channels
Channel layout                           : C L R Ls Rs LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 93.750 FPS (512 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossless
Language                                 : English
Default                                  : No
Forced                                   : No

Audio #10
ID                                       : 11
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 11 min
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 181 MiB (1%)
Language                                 : Italian
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Text #1
ID                                       : 12
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Language                                 : Russian
Default                                  : Yes
Forced                                   : No

Text #2
ID                                       : 13
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Title                                    : SDH
Language                                 : English
Default                                  : No
Forced                                   : No

Menu
00:00:00.000                             : en:00:00:00.000
00:02:50.670                             : en:00:02:50.670
00:06:14.874                             : en:00:06:14.874
00:10:41.891                             : en:00:10:41.891
00:15:10.201                             : en:00:15:10.201
00:19:14.278                             : en:00:19:14.278
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02:08:06.262                             : en:02:08:06.262

I can post details of some other problematic ones if you like - there are quite a few.

Is there a way for you to reboot and go to that thumb directly?
If you do – does it still look pixellated?

The texture may be corrupted.

If I reboot from the Power menu, then go into Videos/Files, then the data source, and scroll down to the film, the thumbnail is still corrupted. Is there a more direct route than that?

I think that’s because the corrupted image is now cached. It should probably be solved in the next kernel (4.9), but if it isn’t, I have some ideas.

Okay, I’ll add that to my list of things to bug you about after the 4.9 kernel comes out. :slight_smile:

(Actually that’s only the second item on the list).

If you want to be able to test it the easiest way is to just rename the file and then look at the file in the “videos>files” to see an updated thumbnail. Just remember to name it back to what it was before the test so your library doesn’t have to get updated.

Unless I’m missing something, that shouldn’t be necessary, given that it only happens with files that aren’t picked up by the scraper and thus aren’t added to the library.

Anyway, I tried renaming the file at the server end, and then rebooting the Vero 4K+, but the thumbnail still looks much the same.

I’m happy to revisit this after the kernel update, it isn’t exactly urgent. :slight_smile:

It is my understanding that these types of thumbnails are cached for 24hrs before they are refreshed. Renaming is the quick and dirty to ensure a fresh thumbnail generation. Rebooting is not necessary, just leaving the screen and coming back is enough.

Hi, sorry for the late reply. Yes, you are all right, it is just for videos, which are not scraped and therefore a thumbnail is created by Kodi. The thumbnail looks similar to the one provided by angry.sardine.

IMG_20191005_113510

I copied the file do a different name and the thumbnail was created exactly the same as for the source file.

I think this is a bug in AmVideoCap implementation. I’ll check it.

It’s also happening with bookmark images in the video player OSD.

Yes – that uses AMVideocap as well.