Video playback stutters every 4 seconds

[teiva 18]

Environments:

1. Running web app in Chrome 54.0.2840.99 m (64-bit) on windows 10.

2. Same behavior within Emby Android app when casting with Chromecast Ultra to my Panasonic Viera. 

3. Same behavior within Emby Android TV app on Mibox3. 

Transcoding (16 fps) - 16.1 Mbps ts h264 aac

 

Settings:

Nothing special besides English closed captions. 1080p - 60mbps

 

Actual Behavior:

The video/audio freezes about every 4 seconds for 1-2 seconds and resumes playing for another 4 seconds. 

 

Side Node: 

Streams fine with no stutter in Kodi and/or Emby Android app on my Nexus 6p. The buffering/transcoding (red bar) is well ahead the play point. 

 

playbackLog.txt

Edited November 28, 2016 by teivalp

[Luke 37008]

Hi, in this log here your transcoding is just not fast enough. It's burning in subtitles which can be painful, so this is not a typical transcoding session.

 

To improve performance, you could switch off the subtitles and/or consider acquiring text-based subtitles that won't need to be burned in. 

[teiva 18]

K. Thanks. I'll add a feature request to easily acquire text based subtitles.  

[teiva 18]

.... your transcoding is just not fast enough...

 

Can you point out where or how by looking in the log you know this? I'm asking so I can get more competent about looking inside the log. 

 

Thanks!

Edited November 28, 2016 by teivalp

[Luke 37008]

This is the video filter being applied that is burning in the subs:

-filter_complex "[0:2]format=yuva444p,scale=1920:1080,lut=u=128:v=128:y=gammaval(.3)[sub] ; [0:0] [sub] overlay"

The [0:2] is an identifier that tells it which track to burn in.