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Quote
The simplest solution is to run the file through Handbrake, as suggested earlier in this thread.
I tried that but haven't gotten the video and audio in sync yet. I need to fiddle with it a bit more before I go to Plan B.
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Hi all,
I've had a similar issue with some old family films. I had the films digitized and would like to put them on a DVD (yes, I still make those) to give the family at Christmas. I've playtested the files and there is significant lag between audio and video. For now I'm focusing on one of the shorter clips, and if I can nail the issue with this one, I can hopefully apply the same solution to the longer ones. I can unlink the audio and video easily enough and move them around, but if there's a solid digital solution (one that doesn't rely on my clumsy efforts), that is best.
Following some advice on this thread, I analyzed the file using MediaInfo. The text output is pasted below. To my untrained eye, it looks like I am dealing with constant frame rate video (24.00 fps). It looks like the audio has a different frame rate (46.875 fps). How can I use this information to re-sync the audio and video?
Cheers,
Erik
General
Complete name : E:\Videos and Sounds\Cyber Link\2021 Family Videos\Carlson Family Films\Carlson Films 17.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 134 MiB
Duration : 3 min 2 s
Overall bit rate : 6 171 kb/s
Writing application : Lavf57.83.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3
Format settings : 3 Ref Frames
Format settings, CABAC : No
Format settings, Reference frames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3 min 2 s
Bit rate : 6 040 kb/s
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 24.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.162
Stream size : 131 MiB (98%)
Writing library : x264 core 152 r2854 e9a5903
Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=34 / lookahead_threads=5 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 3 min 2 s
Duration_LastFrame : -2 ms
Bit rate mode : Constant
Bit rate : 128 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 : 2.79 MiB (2%)
Default : Yes
Alternate group : 1
Other
ID : 3
Type : Time code
Format : QuickTime TC
Duration : 3 min 2 s
Frame rate : 24.000 FPS
Time code of first frame : 01:00:00:00
Time code, striped : Yes
Language : English
Default : No
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