Refresh rate changing causing jerky playback on older 4:3 content

[MSattler 387]

Does the Android TV client know when not to use refresh changes?  If the framerate is 23.976 fps but the resolution is 4:3 should it still change the refresh rate?  Once I disabled it, playback was fine.

 

I see no translog file so it appears it direct played to my Nvidia Shield.

 

I tried to play a video and it was jerky:

 

Format                                   : Matroska

Format version                           : Version 4 / Version 2

File size                                : 3.28 GiB

Duration                                 : 46mn 57s

Overall bit rate                         : 9 991 Kbps

Writing application                      : Lavf57.23.101

Writing library                          : Lavf57.23.101

 

Video

ID                                       : 1

Format                                   : AVC

Format/Info                              : Advanced Video Codec

Format profile                           : High@L4.1

Format settings, CABAC                   : Yes

Format settings, ReFrames                : 5 frames

Codec ID                                 : V_MPEG4/ISO/AVC

Duration                                 : 46mn 57s

Bit rate                                 : 8 480 Kbps

Width                                    : 1 440 pixels

Height                                   : 1 080 pixels

Display aspect ratio                     : 4:3

Frame rate mode                          : Constant

Frame rate                               : 23.976 fps

Color space                              : YUV

Chroma subsampling                       : 4:2:0

Bit depth                                : 8 bits

Scan type                                : Progressive

Bits/(Pixel*Frame)                       : 0.227

Stream size                              : 2.72 GiB (83%)

Writing library                          : x264 core 142 r2431 ac76440

Encoding settings                        : cabac=1 / ref=5 / deblock=1:-2:-2 / analyse=0x3:0x113 / me=umh / subme=8 / 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=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pass / mbtree=1 / bitrate=8480 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00

Language                                 : English

Default                                  : Yes

Forced                                   : No

DURATION                                 : 00:46:57.147000000

 

Audio

ID                                       : 2

Format                                   : DTS

Format/Info                              : Digital Theater Systems

Mode                                     : 16

Format settings, Endianness              : Big

Codec ID                                 : A_DTS

Duration                                 : 46mn 57s

Bit rate mode                            : Constant

Bit rate                                 : 1 509 Kbps

Channel(s)                               : 6 channels

Channel positions                        : Front: L C R, Side: L R, LFE

Sampling rate                            : 48.0 KHz

Bit depth                                : 24 bits

Compression mode                         : Lossy

Stream size                              : 507 MiB (15%)

Language                                 : English

Default                                  : Yes

Forced                                   : No

DURATION                                 : 00:46:57.108000000

 

Text

ID                                       : 3

Format                                   : ASS

Codec ID                                 : S_TEXT/ASS

Codec ID/Info                            : Advanced Sub Station Alpha

Compression mode                         : Lossless

Title                                    : SDH

Writing library                          : Lavc57.24.100 ass

Language                                 : English

Default                                  : No

Forced                                   : No

DURATION                                 : 00:46:57.399000000

 

Menu

00:00:00.000                             : :00:00:00.000

00:12:37.507                             : :00:12:37.507

00:24:06.737                             : :00:24:06.737

00:32:39.457                             : :00:32:39.457

00:46:07.932                             : :00:46:07.932

 

thanks!

 

[ebr 14904]

Why would the aspect ratio have any bearing on the refresh rate?

[MSattler 387]

Why would the aspect ratio have any bearing on the refresh rate?

 

I'm not sure, all my other content seems to play fine, it was only with this 4:3 aspect ratio that I've had issues with.

[Luke 37012]

It is probably the high ref frame count. At 1080p 5 ref frames is generally too much for most players to handle. 4 is considered the same maximum. I thought we had a check to transcode this, unless transcoding has been disabled.

[ebr 14904]

We are limiting 1080 content to 4 ref frames but only for h264 specifically.  His media info wasn't our format so i'm not sure if maybe we're not seeing that item as h264...

 

Also possible we were transcoding it.

[MSattler 387]

It is probably the high ref frame count. At 1080p 5 ref frames is generally too much for most players to handle. 4 is considered the same maximum. I thought we had a check to transcode this, unless transcoding has been disabled.

 

Transcoding is enabled but currently on the Shield this plays back directly.  Is there something I should do differently?  Do I need to re-encode all of this content?

[ebr 14904]

Please post the media info from our web client for this item.  Thx.

[MSattler 387]

Please post the media info from our web client for this item.  Thx.

 

 

ideoCodecH264

AVCYes

ProfileHigh

Level41

Resolution1440x1080

Aspect ratio4:3

AnamorphicNo

InterlacedNo

Framerate23.97602

Bitrate10098 kbps

Bit depth8 bit

Pixel formatyuv420p

Ref frames5

NAL4

AudioLanguageeng

CodecDCA

ProfileDTS

Layout5.1

Channels6 ch

Bitrate1536 kbps

Sample rate48000 Hz

Bit depth24 bit

DefaultYes

TitleEng DTS 5.1 Default

SubtitleLanguageeng

CodecSSA

DefaultNo

ForcedNo

ExternalNo

TitleEng

[ebr 14904]

That shouldn't have been direct streaming with yesterday's beta and before but should with today's (.43).  So try it with that and see if it is any different.

 

If not, I'm not sure what we can do.  I think the fact it is 4:3 is coincidental.

[Luke 37012]

The latest beta version of the Emby app offers improved playback, refresh rate switching, and all the HD Audio pass-through you need. Check out the beta thread for more details:

 

https://emby.media/community/index.php?/topic/42239-android-tv-beta-13x/

 

We think you'll enjoy the next update to the stable channel. Thanks !