[Galaxy Tab S Q&A, Help & Troubleshooting] drahtwurst:
Playing UHD/4k with Samsung Galaxy Tab S

Before I open a thread with the exact same question I give this one a bump. Spoiler: I managed to play 4k video with Samsung Galaxy Tab S 10.5 chagallwifi T800 with downloaded 4k video samples.

I've recently tried several custom ROMS, some MM, some Nougat to figure out differences. I use mx player, bs player and a noname videoplayer (com.ab.videoplayer). VLC player performed poorly with all ROMs so i'm not using it. The players behave differently. While mx+bs players are somewhat identical (dropping videoframes while playing audio correct), the noname video player drops video frames (stutter) but plays audio correctly.

The source video+audio codec also matters. Only some UHD material plays spotless while the size of the media stream is comparable. I was able to audit + tweak CPU+GPU performance to max with deadly audiutor. Tweaking would not make much difference. I observed CPU+GPU would not stress to 100% even without tweaking. So what would be the reason for dropping frames in audio or video? In the windows world I would look for the codecs the material was coded in and search for a capable player. In android the functionality of players is not so well documented. So maybe the wise can figure, what the reason for poor 4k performance is or rather give tips how to avoid it.

Material performing poorly:

Material performing poorly:

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42 (isom/mp42)

Overall bit rate : 22.3 Mb/s

Complete name : Honey Bees 24fps In 4K (ULTRA HD)(4ksamples.com).mp4

Format : MPEG-4

Format profile : Base Media / Version 2

Codec ID : mp42 (isom/mp42)

File size : 604 MiB

Duration : 3 min 47 s

Overall bit rate mode : Variable

Overall bit rate : 22.3 Mb/s

Encoded date : UTC 2012-09-17 15:25:33

Tagged date : UTC 2012-09-17 15:25:33

gsst : 0

gstd : 227601

gssd : B3EE74BC4MM1350869204851145

gshh : o-o---preferred---sn-gqn-vu2l---v17---lscache5.c.youtube.com

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L5.1

Format settings : 1 Ref Frames

Format settings, CABAC : No

Format settings, RefFrames : 1 frame

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 3 min 47 s

Bit rate : 22.1 Mb/s

Maximum bit rate : 55.8 Mb/s

Width : 4 096 pixels

Height : 2 304 pixels

Display aspect ratio : 16:9

Frame rate mode : Constant

Frame rate : 24.000 FPS

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.098

Stream size : 599 MiB (99%)

Encoded date : UTC 1970-01-01 00:00:00

Tagged date : UTC 2012-09-17 15:25:34

Codec configuration box : avcC

Audio

ID : 2

Format : AAC LC

Format/Info : Advanced Audio Codec Low Complexity

Codec ID : mp4a-40-2

Duration : 3 min 47 s

Bit rate mode : Variable

Bit rate : 192 kb/s

Maximum bit rate : 202 kb/s

Channel(s) : 2 channels

Channel layout : L R

Sampling rate : 44.1 kHz

Frame rate : 43.066 FPS (1024 SPF)

Compression mode : Lossy

Stream size : 5.21 MiB (1%)

Title : IsoMedia File Produced by Google, 5-11-2011

Encoded date : UTC 2012-09-17 15:25:34

Tagged date : UTC 2012-09-17 15:25:34

Flawless Performance:

General

Complete name : Elysium_trailer_1-4K-HDTN(4ksamples.com).mp4

Format : MPEG-4

Format profile : Base Media

Codec ID : isom (isom/iso2/avc1/mp41)

File size : 420 MiB

Duration : 2 min 12 s

Overall bit rate : 26.6 Mb/s

Writing application : Lavf54.63.104

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L5.1

Format settings : CABAC / 4 Ref Frames

Format settings, CABAC : Yes

Format settings, RefFrames : 4 frames

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 2 min 12 s

Bit rate : 26.3 Mb/s

Width : 4 096 pixels

Height : 1 716 pixels

Display aspect ratio : 2.40:1

Frame rate mode : Constant

Frame rate : 24.000 FPS

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.156

Stream size : 414 MiB (99%)

Writing library : x264 core 125

Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / 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=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

Language : English

Codec configuration box : avcC

Audio

ID : 2

Format : AAC LC

Format/Info : Advanced Audio Codec Low Complexity

Codec ID : mp4a-40-2

Duration : 2 min 12 s

Bit rate mode : Constant

Bit rate : 384 kb/s

Channel(s) : 6 channels

Channel layout : C L R Ls Rs LFE

Sampling rate : 48.0 kHz

Frame rate : 46.875 FPS (1024 SPF)

Compression mode : Lossy

Stream size : 6.04 MiB (1%)

Language : English

Default : Yes

Alternate group : 1

I could not find info doing a search for 4k nor UHD in https://xdaforums.com/galaxy-tab-s. Thanx in advance for helping out.