Playback error with some Hvec movies

Server Version#:1.14.1.5488 on Qnap TVS-672XT 8GB memory
Player Version#: 3.13.13 Opera on Sony TV

Server; Qnap TVS-672XT - 8GB memory with HW Transcoding to 20Mbts, 1080p.

Dear all,

I’m trying to play some HVEC 4K movies over the internet and some play very smoothly while others are stuttering… But if I look at the CPU then this is jumping to max 40-50% so still enough room and also the memory is far from full.

– CPU this is strong enough.
– Memory is also enough (I know could be more, but when checking still enough left)
– Bandwidth is also enough, as we can have 40 Mbts (both upload as download) so running half of that.

At first I thought it was the size of the movie, but this can’t be it, as some are bigger and running smoothly while others are stuttering; Also did I thought that it would be the sound, but also here it doesn’t matter as some with Dolby Atmos and bigger size are also working smoothly while others again not.

Like this Angels & Demons is running very smoothly.
Angels and Demons.txt (5.7 KB)

Blockquote
Algemeen
UniqueID/String : 1823303002421441502650193585196065442 (0x15F27C74FCCBE13701D7981059162A2)
Volledige naam : O:\D\Da Vinci Code\Angels & Demons (2009)\Angels & Demons (2009).mkv
Formaat : Matroska
Formaatversie : Version 4
Bestandsgrootte : 45,8 GiB
Duur : 2 h 18 min
Totale bitratemodus : Variabel
Totale bitrate : 47,3 Mb/s
Datum codering : UTC 2018-02-22 17:59:10
Gebruikt programma : mkvmerge v20.0.0 (‘I Am The Sun’) 64-bit
Gebruikte encoderbibliotheek : libebml v1.3.5 + libmatroska v1.4.8
Video
ID : 1
Formaat : HEVC
Formaat/Info : High Efficiency Video Coding
Format_Commercial_IfAny : HDR10
Formaatprofiel : Main 10@L5.1@High
Codec-ID : V_MPEGH/ISO/HEVC
Duur : 2 h 18 min
Bitrate : 42,3 Mb/s
Breedte : 3 840 pixels
Hoogte : 2 160 pixels
Beeldverhouding : 16:9
Frameratemodus : Constant
Framerate : 23,976 (24000/1001) FPS
ColorSpace : YUV
ChromaSubsampling/String : 4:2:0 (Type 2)
BitDepth/String : 10 bits
Bits/(Pixel*Frame) : 0.213
Stroomgrootte : 41,0 GiB (89%)
Default : Ja
Forced : Nee
colour_range : Limited
colour_primaries : BT.2020
transfer_characteristics : PQ
matrix_coefficients : BT.2020 non-constant
MasteringDisplay_ColorPrimaries : Display P3
MasteringDisplay_Luminance : min: 0.0050 cd/m2, max: 4000 cd/m2
MaxCLL : 2105 cd/m2
MaxFALL : 1007 cd/m2
Audio
ID : 2
Formaat : MLP FBA 16-ch
Formaat/Info : Meridian Lossless Packing FBA with 16-channel presentation
Format_Commercial_IfAny : Dolby TrueHD with Dolby Atmos
Codec-ID : A_TRUEHD
Duur : 2 h 18 min
Bitrate-modus : Variabel
Bitrate : 4 913 kb/s
Maximale bitrate : 8 085 kb/s
Kanaal(en) : 8 kanalen
Channel layout : L R C LFE Ls Rs Lb Rb
Samplerate : 48,0 kHz
Framerate : 1 200,000 FPS (40 SPF)
Stroomgrootte : 4,76 GiB (10%)
Titel : TrueHD Atmos 7.1
Taal : Engels
Default : Ja
Forced : Nee
Number of dynamic objects : 11
Bed channel count : 1 kanaal
Bed channel configuration : LFE
Tekst #1
ID : 3
Formaat : UTF-8
Codec-ID : S_TEXT/UTF8
Codec-ID/Info : UTF-8 Plain Text
Duur : 2 h 7 min
Bitrate : 52 b/s
ElementCount : 1364
Stroomgrootte : 49,4 KiB (0%)
Titel : Nederlands (SRT)
Taal : Nederlands
Default : Ja
Forced : Nee
Tekst #2
ID : 4
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 2 h 7 min
Bitrate : 34,0 kb/s
ElementCount : 2738
Stroomgrootte : 31,1 MiB (0%)
Titel : Nederlands (PGS)
Taal : Nederlands
Default : Nee
Forced : Nee
Menu
00:00:00.000 : en:Chapter 1
00:09:30.945 : en:Chapter 2
00:17:33.010 : en:Chapter 3
00:25:40.914 : en:Chapter 4
00:32:22.273 : en:Chapter 5
00:43:36.822 : en:Chapter 6
00:51:52.526 : en:Chapter 7
01:01:11.876 : en:Chapter 8
01:10:47.534 : en:Chapter 9
01:17:13.920 : en:Chapter 10
01:26:21.467 : en:Chapter 11
01:37:39.436 : en:Chapter 12
01:47:41.413 : en:Chapter 13
01:58:02.325 : en:Chapter 14
02:03:03.167 : en:Chapter 15
02:07:28.057 : en:Chapter 16
Blockquote

**While this The Great Showman is stuttering very often **
Great Showman.txt (7.5 KB)

Blockquote
Algemeen
UniqueID/String : 125089226267274136398024748900302226832 (0x5E1B4F0443FC19841304B95DAF908590)
Volledige naam : O:\G\Greatest Showman (2017)\The Greatest Showman (2017).mkv
Formaat : Matroska
Formaatversie : Version 4
Bestandsgrootte : 44,2 GiB
Duur : 1 h 44 min
Totale bitratemodus : Variabel
Totale bitrate : 60,4 Mb/s
Datum codering : UTC 2018-04-08 15:19:10
Gebruikt programma : mkvmerge v22.0.0 (‘At The End Of The World’) 64-bit
Gebruikte encoderbibliotheek : libebml v1.3.5 + libmatroska v1.4.8
Video
ID : 1
Formaat : HEVC
Formaat/Info : High Efficiency Video Coding
Format_Commercial_IfAny : HDR10
Formaatprofiel : Main 10@L5.1@High
Codec-ID : V_MPEGH/ISO/HEVC
Duur : 1 h 44 min
Bitrate : 58,2 Mb/s
Breedte : 3 840 pixels
Hoogte : 2 160 pixels
Beeldverhouding : 16:9
Frameratemodus : Constant
Framerate : 23,976 (24000/1001) FPS
ColorSpace : YUV
ChromaSubsampling/String : 4:2:0 (Type 2)
BitDepth/String : 10 bits
Bits/(Pixel*Frame) : 0.292
Stroomgrootte : 42,6 GiB (96%)
Default : Ja
Forced : Nee
colour_range : Limited
colour_primaries : BT.2020
transfer_characteristics : PQ
matrix_coefficients : BT.2020 non-constant
MasteringDisplay_ColorPrimaries : Display P3
MasteringDisplay_Luminance : min: 0.0050 cd/m2, max: 1000 cd/m2
Audio
ID : 2
Formaat : DTS XLL
Formaat/Info : Digital Theater Systems
Format_Commercial_IfAny : DTS-HD Master Audio
Codec-ID : A_DTS
Duur : 1 h 44 min
Bitrate-modus : Variabel
Bitrate : 2 114 kb/s
Kanaal(en) : 2 kanalen
Channel layout : L R
Samplerate : 48,0 kHz
Framerate : 93,750 FPS (512 SPF)
BitDepth/String : 24 bits
Stroomgrootte : 1,55 GiB (3%)
Taal : Engels
Default : Ja
Forced : Nee
Tekst #1
ID : 3
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 1 h 43 min
Bitrate : 51,5 kb/s
ElementCount : 3728
Stroomgrootte : 38,1 MiB (0%)
Taal : Engels
Default : Ja
Forced : Nee
Tekst #2
ID : 4
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 1 h 43 min
Bitrate : 36,0 kb/s
ElementCount : 2556
Stroomgrootte : 26,7 MiB (0%)
Taal : Nederlands
Default : Nee
Forced : Nee
Tekst #3
ID : 5
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 1 h 36 min
Bitrate : 54,2 kb/s
ElementCount : 2359
Stroomgrootte : 37,5 MiB (0%)
Taal : Engels
Default : Nee
Forced : Nee
Tekst #4
ID : 6
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 1 h 44 min
Bitrate : 48,0 kb/s
ElementCount : 2372
Stroomgrootte : 35,9 MiB (0%)
Taal : Nederlands
Default : Nee
Forced : Nee
Tekst #5
ID : 7
Formaat : PGS
Muxingmodus : zlib
Codec-ID : S_HDMV/PGS
Codec-ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duur : 1 h 43 min
Bitrate : 167 kb/s
ElementCount : 5256
Stroomgrootte : 124 MiB (0%)
Taal : Engels
Default : Nee
Forced : Nee
Menu
00:00:00.000 : en:Chapter 1
00:03:21.618 : en:Chapter 2
00:11:33.984 : en:Chapter 3
00:16:21.313 : en:Chapter 4
00:21:13.730 : en:Chapter 5
00:25:04.169 : en:Chapter 6
00:32:10.178 : en:Chapter 7
00:36:09.625 : en:Chapter 8
00:41:38.412 : en:Chapter 9
00:44:41.053 : en:Chapter 10
00:48:24.151 : en:Chapter 11
00:53:11.146 : en:Chapter 12
00:56:20.710 : en:Chapter 13
01:01:34.816 : en:Chapter 14
01:07:33.883 : en:Chapter 15
01:12:00.983 : en:Chapter 16
01:18:23.699 : en:Chapter 17
01:22:07.130 : en:Chapter 18
01:29:04.797 : en:Chapter 19
01:37:09.448 : en:Chapter 20

If anybody has an idea, then any help would be appreciated.

Regards,
Hans

First one has an srt sub, that you most likely used, the other hasn’t, and as such, heavy transcoding took place.

Try for a short test, and play the second without subs

Hello Dane22,

Thanks for your reply. I will try this when I’m at the place. But I noticed also indeed already with Mission Impossible Fallout, that without the sub it did run more smoothly, but also there without the subs, it was stuttering, not that much but still. For your reference I included also for this the movie specs.

But heavy transcoding, I didn’t see when I was checking the CPU status, there was still room. Or will that only be heavy for the internal transcoding of the CPU and you don’t see this? Sorry, but I’m also kinda new with Plex and this way of watching movies (:blush:

.Fallout.txt (7.2 KB)

Thanks again and when I have checked without subtitles, I wil let you know.

Regards,
Hans

The reason is due to transcoding, and to find out why it’s transcoding, you’ll need to look in the PMS log in debug mode, and search for MDE

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