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+--- Thread: Re-Encoding VFR to CFR Audio is out of Sync (/thread-1705.html)
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Re-Encoding VFR to CFR Audio is out of Sync - fltasin - 29.01.2021
I Have a VFR source and I want it to be CFR (23.976FPS)... Using x265...
The Video data is Like This⬇⬇⬇⬇⬇
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings : CABAC / 5 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 30 min 57 s
Bit rate : 595 kb/s
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 27.948 FPS
Original frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
So the Problem is When I Re-encode this at 23.976 FPS the audio is out of sync..
For that 23.976 I use Filtering>speed Change>Scale output frame rate>23.976 FPS...
and the Audio is in Auto Add first (I don't want to mess With audio)
The Audio data is Like this⬇⬇⬇
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 30 min 57 s
Bit rate : 254 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 56.1 MiB (30%)
So How can get the audio sync with the Video?
I want it CFR 23.976 FPS
I don't want to change the duration of the video...
RE: Re-Encoding VFR to CFR Audio is out of Sync - Selur - 29.01.2021
Just using "Filtering>speed Change>Scale output frame rate>23.976 FPS..." will cause synch issues if the input really is vfr.
Try enabling:
"Config->Input->Decoding->CFR output"
and/or
"Config->Internals->Handling->Ignore all input time codes" (<- this needs to be enabled before loading the source)
Cu Selur
RE: Re-Encoding VFR to CFR Audio is out of Sync - fltasin - 29.01.2021
What's the best way to be The video at 23.976FPS since I have VFR source?
RE: Re-Encoding VFR to CFR Audio is out of Sync - Selur - 29.01.2021
There's is no 'best' option. Personally I would try those options and use sRestore to archive the desired frame rate.
Cu Selur
RE: Re-Encoding VFR to CFR Audio is out of Sync - fltasin - 29.01.2021
So I will try those two Options and In vaporsynth tab If i just adjust like this will it be okay? (I Don't want to change the Duration or blended frame)
https://ibb.co/kBtc2ZS
RE: Re-Encoding VFR to CFR Audio is out of Sync - Selur - 29.01.2021
no visible image,..
RE: Re-Encoding VFR to CFR Audio is out of Sync - fltasin - 29.01.2021
(29.01.2021, 20:57)Selur Wrote: no visible image,..
I have edited..
didn't knew it will be weird like that!!
RE: Re-Encoding VFR to CFR Audio is out of Sync - Selur - 29.01.2021
Yes, using that and enabling CFR output should work.
RE: Re-Encoding VFR to CFR Audio is out of Sync - Selur - 29.01.2021
Now that I thought over it again, using sRestore should already force CFR output.
Cu Selur
RE: Re-Encoding VFR to CFR Audio is out of Sync - fltasin - 29.01.2021
(29.01.2021, 21:00)Selur Wrote: Yes, using that and enabling CFR output should work.Okay So I will try These Three... First one will be that Ignore timecode (before loading the source)
after loading all I have to try this!!!
https://ibb.co/6r0hNsv
https://ibb.co/RPgYjcP
https://ibb.co/fQKK1gB
And not use that Filtering>speed Change>Scale output frame rate>23.976 FPS...
Will it be alright?
I encoded a thing for 25 hours and i am getting that (audio out of sync)
SO I just want to be make sure...
