Encoding or playback judder problem (Mainconcept)

[scotlandman]

Hi Guys

I have a slight playback problem and I am hoping that someone could provide me with a solution.

I am using Mainconcept Totalcode Studio to create x265 HEVC Movie from m2ts Bluray source. Original source is 23.987 or 24fps.

I use HEVC 1080p Main default settings in the software which is by default 25fps. Bitrate is target 10000kbps with max 120000kbps the results are fantastic. I then use mkvmergeGui to mux into MKV setting video fps to 25fps.

But during playback using MPC-HC X64 I keep noticing a slight judder it is as if the 25fps has created a loop of the 24fps or something to that effect. This is more noticeable on larger display but none the less still noticeable on PC screen 27 inch.

I'm using 6core 2014 Mac Pro for playback so it handles the playback and encoding perfectly.

I would be very grateful if someone could however help me with the slight lag/judder issue.

Would it be better to try and use as close to native fps as possible in HEVC Settings or must it be by default 25fps. I'm at a loss as to what may be causing this. Other than this the playback is awesome.

Many thanks guys

[xooyoozoo]

This is almost certainly the wrong thread for an encoding issue. ;)

Original source is 23.987 or 24fps.

I use HEVC 1080p Main default settings in the software which is by default 25fps.

Unless told to otherwise, most software change fps by adding/removing frames, not by speeding/slowing the video. This is likely where the judder comes from.

Would it be better to try and use as close to native fps as possible in HEVC Settings or must it be by default 25fps

The encoder doesn't see framerate. It sees a collection of pictures with a suggested order.

[foxyshadis]

Does the lag always happen in the same place? If not, your system might not be able to keep up with the playback. If it is, try opening it in in an editing tool (such as AvsP with Avisynth, using L-SMASHSource) to determine what's been done to the video at that point -- see if there are duplicate frames, reversed frames, or whatever.

A sample Avisynth script that will preview frames:

LWLibavVideoSource("your.mp4")

[scotlandman]

This is almost certainly the wrong thread for an encoding issue. ;)



Unless told to otherwise, most software change fps by adding/removing frames, not by speeding/slowing the video. This is likely where the judder comes from.



The encoder doesn't see framerate. It sees a collection of pictures with a suggested order.

Hi

Thank you very much for your help and reply I will do more testing and see if I can find out what or indeed which part of the process may be causing this.

[scotlandman]

Does the lag always happen in the same place? If not, your system might not be able to keep up with the playback. If it is, try opening it in in an editing tool (such as AvsP with Avisynth, using L-SMASHSource) to determine what's been done to the video at that point -- see if there are duplicate frames, reversed frames, or whatever.

A sample Avisynth script that will preview frames:

LWLibavVideoSource("your.mp4")

Hi foxyshadis

Thank you very much for your reply.

The lag happens fairly randomly and not always in the same place, But to be fair the Mac Pro is more than capable of handling the playback, I'm working with PROCESSOR 3.5GHz 6-Core Intel Xeon E5
MEMORY 32GB 1866MHz DDR3 ECC - 4X8GB
HARD DRIVE 1TB PCIe-based Flash Storage
GRAPHICS CARD Dual AMD FirePro D700-6GB VRAM and running bootcamp windows 8.1 pro.

I will try the method you mention to see if anything has been done to the video. Will also contact the mainconcept guys for advise.

Many thanks