VC1 converted to H265 jitters

[MeSysel]

Hi all,
I made several BluRay backups by MakeMKV and converted it to x265 using AVIDemux - works perfect, very smooth.

Once I realized one disk backup is almost unwatchable, while it jitters very much using same x265 presets (checked several times).
I realized that only difference is, the jittering souce video in MKV made by MakeMKV is coded by VC1 codec. None of those 10-15 that works is coded by VC1.

When I just play directly the "original" not-reencoded file (MKV or AVI with VC1) it plays ok. In time I pass it through AVIdemux with same X265 preferences, the output jitters.


For experiments I created just very small part of the movie as AVI (AVI itself is played ok, MediaINFO log attached). But no success with x265 conversion..

I also tried to force FPS (Resample FPS filter of AVI demux).
A have not changed any x265 settings while I must say am not aware of what it does. I am using just simple the non advanced setup:
Preset: medium
Tuning: psnr
Profile: main
IDC level: auto
Pool, Frame threads: auto
Encoding mode: CRF
Quality: 17

Any help is highly appreciated. Thank you in advance.

[davexnet]

That output is almost unintelligible. Use this mediainfo to analyze the file, put it it text view,
copy and paste the info here directly

[MeSysel]

OK, here it is, thank you:
General
Complete name : Cliffhanger_pokus.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 445 MiB
Duration : 2 min 23 s
Overall bit rate : 26.0 Mb/s

Video
ID : 0
Format : VC-1
Codec ID : WVC1
Codec ID/Hint : Microsoft
Duration : 2 min 23 s
Bit rate : 21.4 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 (24000/1001) FPS
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.430
Stream size : 366 MiB (82%)

Audio #1
ID : 1
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : 2001
Codec ID/Info : Digital Theater Systems
Duration : 2 min 21 s
Bit rate mode : Constant
Bit rate : 1 509 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 25.8 MiB (6%)
Alignment : Aligned on interleaves
Interleave, duration : 11 ms (0.26 video frame)

Audio #2
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : 2001
Codec ID/Info : Digital Theater Systems
Duration : 2 min 21 s
Bit rate mode : Constant
Bit rate : 1 509 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 25.8 MiB (6%)
Alignment : Aligned on interleaves
Interleave, duration : 11 ms (0.26 video frame)

Audio #3
ID : 3
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : 2001
Codec ID/Info : Digital Theater Systems
Duration : 2 min 21 s
Bit rate mode : Constant
Bit rate : 1 509 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 93.750 FPS (512 SPF)
Bit depth : 24 bits
Compression mode : Lossy
Stream size : 25.8 MiB (6%)
Alignment : Aligned on interleaves
Interleave, duration : 11 ms (0.26 video frame)

[Selur]

libav has probably some problem with it and like your player you probably need a decoder during conversion which uses a hardware decoder.
(as a side note: wrapping newer formats which use b-frames and I- frames that do not have to be key frames inside an avi container is a good way to run into problems; dts inside .avi is also a bad idea, same as putting .aac in it,..)

Cu Selur

[El Heggunte]

libav has probably some problem with it and like your player you probably need a decoder during conversion which uses a hardware decoder.
(as a side note: wrapping newer formats which use b-frames and I- frames that do not have to be key frames inside an avi container is a good way to run into problems; dts inside .avi is also a bad idea, same as putting .aac in it,..)

I won't deny that the file of the OP may be problematic, but please stop spreading nonsense about VC-1.
MKVmerge itself uses the VfW-compatibility mode to store VC-1 in Matroska. And DTS's DCA format uses strictly-constant bitrate, so it requires no special tricks to be stored in the AVI container.

[MeSysel]

Hi,
so thank you very much for the idea of having troubles with decoding the original video. I found out that it is not possible to change or parametrize the AVIDemux decoder, so I tried just HandBrake in place of AVIDemux with default settings and: IT WORKED!
Thanks again, no jitters now.