Uncropmkv causing audio sync issues

[mrtoad883]

Hey guys, been using uncropmkv for awhile now, first time with any issues. Recently changed a 1920x800 to 1920xw1080. Video was fine but somehow the audio was delayed. Ive never had this issue before. Anyone else?

[mrtoad883]

Format : Matroska
Format version : Version 4 / Version 2
File size : 4.22 GiB
Duration : 1 h 45 min
Overall bit rate : 5 722 kb/s
Writing application : Lavf57.25.100
Writing library : Lavf57.25.100 / Lavf57.25.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1 h 45 min
Bit rate : 4 968 kb/s
Width : 1 920 pixels
Height : 800 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.135
Stream size : 3.67 GiB (87%)
Writing library : x264 core 146 r2538 121396c
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x133 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
DURATION : 01:45:39.166000000

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 1 h 45 min
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 spf)
Compression mode : Lossy
Stream size : 484 MiB (11%)
Default : Yes
Forced : No
DURATION : 01:45:39.093000000

[mail2tom]

The only time I've experienced A/V synch issues is when something was wrong with the audio. I did notice that your Audio and Video durations are not the same.

[mrtoad883]

Yea I just noticed that as well, but on the original file it plays perfectly fine so I wonder why it affects it after uncropmkv does its thing

[Ennio]

What you can try is importing the 1920x800 source mkv in mkvtoolnix and remux to new output. Then check if that new output has no a/v sync issues.
If it's okay, uncrop that new file and see if it comes out okay. Sometimes remuxing with mkvtoolnix fixes certain issues.

[mrtoad883]

interesting, i will give that a go