Microstutter in 29.97fps files... - AVS Forum
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post #1 of 6 Old 06-25-2013, 07:03 PM - Thread Starter
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Not sure if this is the first 29.97fps file I ripped without re-encoding or not but it's certainly the first time I've noticed it. I searched around and found people report similar issues but typically on playback with a certain device... and for their issues remuxing to another container fixed the issue. I'm having this issue on 3 different PCs with VLC, Plex and XBMC... the microstutter is nearly non-existant with XBMC though. I'm also getting small horizontal white lines during movement. Also barely noticeable. The white lines go away when I use the deinterlace filter. I'm guessing it's something small I'm overlooking. The files are from the Doctor Who Series 7 Blu-ray and they are around 30~35Mbps.... thoughts?

Correction.. bitrate is avg 38Mbps max 48Mbps.

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post #2 of 6 Old 06-25-2013, 10:05 PM
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VC-1 1080i60?
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post #3 of 6 Old 06-26-2013, 03:16 AM - Thread Starter
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It's AVC. Here is the output from the original m2ts file. I'm starting to think the stuttering is actually in the video itself. I re-encoded it to x264 and it's still there...

General
ID : 0 (0x0)
Complete name : W:\Encode\00004.m2ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 11.2 GiB
Duration : 41mn 20s
Overall bit rate mode : Variable
Overall bit rate : 38.9 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : 27
Duration : 41mn 20s
Bit rate mode : Variable
Bit rate : 35.3 Mbps
Maximum bit rate : 39.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : MBAFF
Bits/(Pixel*Frame) : 0.569
Stream size : 10.2 GiB (91%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : DTS
Format/Info : Digital Theater Systems
Format profile : HRA / Core
Mode : 16
Format settings, Endianness : Big
Muxing mode : Stream extension
Codec ID : 133
Duration : 41mn 20s
Bit rate mode : Constant
Bit rate : 2 046 Kbps / 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 : 605 MiB (5%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Delay relative to video : 5s 772ms

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post #4 of 6 Old 06-28-2013, 06:06 PM - Thread Starter
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So I went back to my Sliders collection which is also 29.97 fps and it also has a microstutter.... so I'm either being overly sensitive to the stutter or I'm configuring something wrong for that frame rate. Any ideas? Has anyone else seen stuttering (that doesn't appear to be performance related) with 29.97 fps?

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post #5 of 6 Old 06-28-2013, 09:01 PM
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Every commonly available 29.97 fps video is interlaced. Your problem sounds like bad de-interlacing. A good de-interlaceer needs to detect film vs. video content and apply the correct algorithm when converting the 29.97 fps video to 60 fps progressive.
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post #6 of 6 Old 06-29-2013, 05:58 AM
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Changing the splitter sometimes fixes the problem. The current best splitter is LAV splitter (its video and audio decoders are also recommended).
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