Can't direct play some 4k movies

General Discussions
1

I have some 4k movies that look the same to me. The first listed below does play without transcoding. The second movie listed will not. I must transcode to 1080p for it to start playing regardless if I transcode the audio from truehd or play the AC3 audio stream. I have no idea why and its driving me crazy. My plex thinks the connection resets or something when I try to play it. I tried it on a nvidia shield tv and the new shield pro with the same issues. It plays fine on both devices over vlc, the server is running on a 720xd with plenty of power and a p2000 for transcoding.

You will see at the end of the logs it just hangs there. I see the loading wheel on my screen but nothing ever plays. I’ve waited for 30 minutes. The good movie plays right away and if I transcode the movie down to 1080p on my 4k TV it plays.

Good Movie

Media

  • Duration 2:29:21
  • Bitrate 19004 kbps
  • Width 3840
  • Height 1608
  • Aspect Ratio 2.35
  • Video Resolution 4K
  • Container MKV
  • Video Frame Rate 24p
  • Video Profile main 10

Part

  • Duration 2:29:21

  • File Avengers Infinity War (2018) - [BLURAY-2160P][TRUEHD ATMOS 7.1][X265]-.mkv

  • Size 19.83 GB

  • Container MKV

  • Video Profile main 10

  • Codec HEVC

  • Bitrate 18364 kbps

  • Bit Depth 10

  • Chroma Subsampling 4:2:0

  • Color Primaries bt2020

  • Color Range tv

  • Color Space bt2020nc

  • Color Trc smpte2084

  • Frame Rate 23.976 fps

  • Height 1608

  • Level 5.1

  • Profile main 10

  • Ref Frames 1

  • Width 3840

  • Display Title 4K (HEVC Main 10 HDR)

  • Codec TRUEHD

  • Channels 8

  • Language English

  • Audio Channel Layout 7.1

  • Bit Depth 24

  • Sampling Rate 48000 Hz

  • Display Title English (TRUEHD 7.1)

  • Codec AC3

  • Channels 6

  • Bitrate 640 kbps

  • Language English

  • Audio Channel Layout 5.1(side)

  • Sampling Rate 48000 Hz

  • Display Title English (AC3 5.1)

  • Forced true

  • Codec SRT

  • Language English

  • Title English Forced

  • Display Title English Forced (SRT)

Bad Movie

Media

  • Duration 3:01:11
  • Bitrate 24664 kbps
  • Width 3840
  • Height 1608
  • Aspect Ratio 2.35
  • Video Resolution 4K
  • Container MKV
  • Video Frame Rate 24p
  • Video Profile main 10

Part

  • Duration 3:01:11

  • File Avengers Endgame (2019) - [BLURAY-2160P][TRUEHD ATMOS 7.1][X265]-HDC.mkv

  • Size 31.22 GB

  • Container MKV

  • Video Profile main 10

  • Codec HEVC

  • Bitrate 24024 kbps

  • Bit Depth 10

  • Chroma Subsampling 4:2:0

  • Color Primaries bt2020

  • Color Range tv

  • Color Space bt2020nc

  • Color Trc smpte2084

  • Frame Rate 23.976 fps

  • Height 1608

  • Level 5.1

  • Profile main 10

  • Ref Frames 1

  • Title FFlipped @ HDChina

  • Width 3840

  • Display Title 4K (HEVC Main 10 HDR)

  • Codec TRUEHD

  • Channels 8

  • Language English

  • Audio Channel Layout 7.1

  • Bit Depth 24

  • Sampling Rate 48000 Hz

  • Title English Atmos TrueHD 7.1 @ 5417 kbps

  • Display Title English (TRUEHD 7.1)

  • Codec AC3

  • Channels 6

  • Bitrate 640 kbps

  • Language English

  • Audio Channel Layout 5.1(side)

  • Sampling Rate 48000 Hz

  • Title English DD 5.1 @ 640 kbps

  • Display Title English (AC3 5.1)

VerbosePlex Media Server Logs_2020-05-26_14-56-39.zip (4.8 MB)

2

I see a significant difference in bit-rate (Good=Bitrate 19004 kbps while Bad = Bitrate 24024 kbps) and bit-rate has been identified (well strongly thought) to cause trans-coding. See H264 Transcoding for commentary and a success story or two.

3

Whats interesting to me is it will try to play without transcoding. If you see the logs it just looks like the end device stops responding or something. The server can certainly direct play it since it works completely fine in VLC, and if it was transcoding it on its own that would be fine too. Instead it doesnt play anything and just sits like its loading forever until I force it to transcode.

Also another movie that does play just fine and has double the bitrate.

Media

  • Duration 2:10:26
  • Bitrate 50694 kbps
  • Width 3840
  • Height 2160
  • Aspect Ratio 1.78
  • Video Resolution 4K
  • Container MKV
  • Video Frame Rate 24p
  • Audio Profile ma
  • Video Profile main 10

Part

  • Duration 2:10:26

  • File Harry Potter and the Deathly Hallows Part 2 (2011) - [REMUX-2160P][DTS-X 7.1][HEVC].mkv

  • Size 46.19 GB

  • Audio Profile ma

  • Container MKV

  • Video Profile main 10

  • Codec HEVC

  • Bitrate 49158 kbps

  • Bit Depth 10

  • Chroma Subsampling 4:2:0

  • Color Primaries bt2020

  • Color Range tv

  • Color Space bt2020nc

  • Color Trc smpte2084

  • Frame Rate 23.976 fps

  • Height 2160

  • Level 5.1

  • Profile main 10

  • Ref Frames 1

  • Width 3840

  • Display Title 4K (HEVC Main 10 HDR)

  • Codec DCA

  • Channels 8

  • Bitrate 1536 kbps

  • Language English

  • Audio Channel Layout 7.1

  • Bit Depth 24

  • Profile ma

  • Sampling Rate 48000 Hz

  • Title DTS:X 7.1

  • Display Title English (DTS-HD MA 7.1)

5

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.