50fps Live Streams hardware transcoding buffer every 2 seconds

Live TV & DVR
1

Server Version#: 1.41.3.9314
Player Version#: Web 4.141.0
Tuner Make/Model:
Guide/Lineup name:
Using XMLTV?: Yes
Channel number/Name: TNT Sports 1, TNT Sports 2
<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>

My server is perfectly capable to transcode hardware realtime these 50fps streams as i tested separately with ffmpeg , however the plex transcoder seems to have some issues. Even transcoding to 720p doesn’t solve anything, the pauses are exactly the same showing further that is not a hardware issue but a software one regarding 50fps streams.

Cpu is Intel(R) Core™ i5-4690K CPU @ 3.50GHz

2

The i5-4690K uses a fairly early version of Intel’s HD Graphics 4600 chipset. It nominally supports HEVC decoding and will do so successfully – just not for all flavors of HEVC.

More conclusive support for HEVC was added with Kaby Lake (i5-7xxxx chips)

3

As I said, I can transcode it hardware realtime just fine with ffmpeg

4

Are you sure ffmpeg is using the CPU’s iGPU for he-transcoding?
The i5-4690K is part of Intel‘s Haswell architecture/lineup… and at least according to Wikipedia, there‘s no HEVC support in Quicksync.

5

I’m not doing hevc, the incoming stream is h264, i’m transcoding to h264. There is no hevc involved in my transcoding with ffmpeg or the plex transcoding.

6

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