LE 9.01 PI2 having problems with a video file

jaspov · March 29, 2019 at 8:48 AM

Just watched a video yesterday that played "choppy" and out of sync with audio. Learned a few weeks ago that this can happen with 10 bit files, so I checked and this file is 8-bit.

In Libreelec I brought up stats and CPU does not seem to choke which usually happened when I had issues. Also checked the file on windows and it plays smooth and in sync there.

On screen stats show CPU low values and only a few skips (when playback is choppy the skip counter does not go up). I did notice the err: value as well at (12.3ms in picture) variating constantly with values from -22 to +18 when playing. Never paid much attenttion to this value so unsure if it is a key to the solution.

Below I added Mediainfo (from MPC-HC in windows) and playback screenshot. Happy to add logs if it helps but perhaps this info is already sufficient to show I am asking my pi2 to play a file it is not equiped to handle?

Code

General
Unique ID                      : 0 (0x0)
Complete name                  : U:\test.mkv
Format                         : Matroska
Format version                 : Version 4 / Version 2
File size                      : 3.83 GiB
Duration                       : 1 h 29 min
Overall bit rate               : 6 167 kb/s
Encoded date                   : UTC 2010-02-22 21:41:29
Writing application            : no_variable_data
Writing library                : no_variable_data

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : Main@L4
Format settings, CABAC         : Yes
Format settings, RefFrames     : 4 frames
Format settings, GOP           : M=4, N=33
Codec ID                       : V_MPEG4/ISO/AVC
Duration                       : 1 h 29 min
Bit rate                       : 5 853 kb/s
Width                          : 1 920 pixels
Height                         : 1 080 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 25.000 FPS
Standard                       : Component
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : MBAFF
Scan type, store method        : Interleaved fields
Scan order                     : Top Field First
Bits/(Pixel*Frame)             : 0.113
Stream size                    : 3.64 GiB (95%)
Language                       : English
Default                        : Yes
Forced                         : No
Color range                    : Limited
Color primaries                : BT.709
Transfer characteristics       : BT.709
Matrix coefficients            : BT.709

Audio
ID                             : 2
Format                         : AC-3
Format/Info                    : Audio Coding 3
Format settings, Endianness    : Big
Codec ID                       : A_AC3
Duration                       : 1 h 29 min
Bit rate mode                  : Constant
Bit rate                       : 192 kb/s
Channel(s)                     : 2 channels
Channel positions              : Front: L R
Sampling rate                  : 48.0 kHz
Frame rate                     : 31.250 FPS (1536 SPF)
Bit depth                      : 16 bits
Compression mode               : Lossy
Stream size                    : 122 MiB (3%)
Language                       : English
Service kind                   : Complete Main
Default                        : Yes
Forced                         : No

Display More

**Iridium** · March 29, 2019 at 5:52 PM Official Post

Sounds suspiciously like a decoding issue.

Please provide a full debug log.

How to post a log (wiki)

1. Enable debugging in Settings>System Settings>Logging
2. Restart Kodi
3. Replicate the problem
4. Generate a log URL (do not post/upload logs to the forum)

use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

Also (If legal) please provide a snippet of the offending file.

jaspov · March 29, 2019 at 7:38 PM

Thanks. Just ran debug logging and noticed FPS at 8.3 which seems off but would explain choppy movement.

Used log uploader, log at: http://ix.io/1ep2

Can share part of file via pm if it helps.

**Iridium** · March 30, 2019 at 5:32 PM Official Post

Nothing obvious in the log - have you tried the same file via a USB stick or HDD.

Without a "legal" snippet of the file in question, it's difficult to debug the situation.

jaspov · March 30, 2019 at 7:56 PM

Sent a clip via PM. Will try to test on USB tomorrow, need to het a USB stick from somewehere.

**Iridium** · March 31, 2019 at 10:50 AM Official Post

Just tried on Ubuntu, RPi3B+ via USB and via SMB to a network server without any playback issues.

You might need to look at your network server for errors.

jaspov · March 31, 2019 at 12:02 PM

Thanks. I just tried a USB stick and the file plays just as badly from USB. Sound is immediately out of sync and playback choppy.

Pi2 plays most stuff I've thrown at it. Not my own encode this so perhaps some exotic combination that isnt working here.

mikerock · May 8, 2019 at 3:46 AM

I just did a backup/install/restore upgrade from 8.2.5 to 9.0.1 and now my mkv rips of HD (1080p) television shows are choppy. I don't have any audio problems, but the video appears to be running a low frame rate. I am running on an Intel NUC with a USB connected Seagate hard drive. I haven't yet captured any debug logs.

Update:

When I turn logging on, it shows a 30fps frame rate and about 30%-60% CPU usage. When I exit out to the video with logging on, I see a displayed frame rate of 60fps. The log file shows several of the following error messages:

CDVDClock::ErrorAdjust - CVideoPlayerAudio::OutputPacket - error:-10076.633064, adjusted:-10076.633064

I don't know if that has anything to do with the strange motion artifact. Perhaps this is a kodi issue.

mikerock · May 8, 2019 at 9:05 PM

Others on the Kodi forum have noticed video issues in the upgrade to Leia.

Kodi Stuttering Issue Thread

This discussion on the LibreElect forum is the most datailed and mentions that Kodi 18.2 might have a fix.

Kodi 18.1 Video Stutter

Kodi 18.2

Kodi 18.2 on GitHub

jaspov · May 10, 2019 at 11:24 AM

I am having more issues and found a workaround! I had more stuttering issues with a downloaded tv show. Turns aut that switching deinterlace settings from auto to off fixes it completely. It is a 25FPS file on a pi2, I read some fixes are for Intel chipsets so not sure if this is related but it looks as if Kodi picks a deinterlace setting my pi2 can't handle (and playback is fine with it off, so it is not needed).

I don't understand how this works so will post all details and log, perhaps someone undertands what is going on

Full log uploaded to: http://ix.io/1ia6

-enabled debug log, rebooted, started playback (choppy), switched deinterlace to off (from auto), played a bit more (played fine

1. Playing with deinterlace on AUTO, it says it is using adv(x2) on my pi2. Playback is choppy and out of sync

2. stats when playback is choppy. frame skips is stable at 2 strangely. buffer seems high

3. choppy playback (deinterlace to auto) with debug log on (after reboot)

4. With debug log still on same screen with deinterlace set to off

Mediainfo on the file in question (downloaded, recorded tv episode)

General

ID : 1 (0x1)

Complete name : U:\Series\Cold Feet\Season 06\Cold_Feet_S06E08_NPO3_HD_VARA_20161216.m2ts

Format : BDAV

Format/Info : Blu-ray Video

File size : 2.97 GiB

Duration : 44 min 36 s

Overall bit rate mode : Variable

Overall bit rate : 9 526 kb/s

Video

ID : 4113 (0x1011)

Menu ID : 1 (0x1)

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L4

Format settings, CABAC : Yes

Format settings, RefFrames : 4 frames

Format settings, GOP : M=3, N=15

Codec ID : 27

Duration : 44 min 36 s

Bit rate : 7 984 kb/s

Width : 1 920 pixels

Height : 1 080 pixels

Display aspect ratio : 16:9

Frame rate : 25.000 FPS

Standard : PAL

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : MBAFF

Scan type, store method : Interleaved fields

Scan order : Top Field First

Bits/(Pixel*Frame) : 0.154

Stream size : 2.49 GiB (84%)

Color range : Limited

Color primaries : BT.709

Transfer characteristics : BT.709

Matrix coefficients : BT.709

Audio #1

ID : 4352 (0x1100)

Menu ID : 1 (0x1)

Format : MPEG Audio

Format version : Version 1

Format profile : Layer 2

Codec ID : 4

Duration : 44 min 36 s

Bit rate mode : Constant

Bit rate : 256 kb/s

Channel(s) : 2 channels

Sampling rate : 48.0 kHz

Compression mode : Lossy

Delay relative to video : 86 ms

Stream size : 81.7 MiB (3%)

Language : ned

Language, more info : Clean effects

Audio #2

ID : 4353 (0x1101)

Menu ID : 1 (0x1)

Format : AC-3

Format/Info : Audio Coding 3

Format settings, Endianness : Big

Codec ID : 129

Duration : 44 min 36 s

Bit rate mode : Constant

Bit rate : 448 kb/s

Channel(s) : 6 channels

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

Sampling rate : 48.0 kHz

Frame rate : 31.250 FPS (1536 SPF)

Bit depth : 16 bits

Compression mode : Lossy

Delay relative to video : 31 ms

Stream size : 143 MiB (5%)

Language : ned

Language, more info : Clean effects

Service kind : Complete Main

Audio #3

ID : 4353 (0x1101)

Menu ID : 1 (0x1)

Format : AC-3

Format/Info : Audio Coding 3

Format settings, Endianness : Big

Codec ID : 129

Duration : 44 min 36 s

Bit rate mode : Constant

Bit rate : 448 kb/s

Channel(s) : 6 channels

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

Sampling rate : 48.0 kHz

Frame rate : 31.250 FPS (1536 SPF)

Bit depth : 16 bits

Compression mode : Lossy

Delay relative to video : 63 ms

Stream size : 143 MiB (5%)

Language : ned

Language, more info : Clean effects

Service kind : Complete Main

mikerock · May 10, 2019 at 8:52 PM

I reverted back to 8.2.5. Now everything looks good. Hopefully, 9.0.2 with Kodi 18.2 will fix the issues with Intel-based systems.

Quote

VAAPI on Intel has gained some corrections for interlaced content that toggled interlaced flags during playback, and therefore caused stutter by reconfiguring the decoder.

jaspov · May 12, 2019 at 6:57 PM

Minor update: saw Libreelec 9.02 is just out (Kodi 18.2). Installed it and issue is unchanged