Webcam record frames missing

[Jama85]

Hello

I have a video what i recorded by webcam.
And the video jump some second frekvently, maybe cause of the lag when recorded. Now i have sound more than one hour, and a video half an hour.
Can i somehow sync the sound?
I try to delete the audio where the frames jump, but no luck.
Any suggestion?

[davexnet]

You'll probably have split it into sections and sync each piece separately

[Jama85]

I am newbie, how i can do it?

[Jama85]

Maybe split every five minute, and try to move the sound to match?

[davexnet]

Probably something like Avidemux. Open your video, leave the video as "copy" (on the left)
and set the audio to PCM. You can use Audio Output /filters/shift audio. You can set - or + to advance/delay the audio
use the A and B markers to set the clip for the first piece that remains in sync.
Save it as clip 1. Move the A and B markers to the next part, recheck (by playing it) and adjust the sync and continue until the end.

Why would a webcam lag the system while recording? Perhaps you should use mediainfo (in View>text) to examine the video/audio properties and post
the information here

[Jama85]

Hello

This is the video info.

General
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 210 MiB
Duration : 1 h 9 min
Overall bit rate mode : Variable
Overall bit rate : 423 kb/s
Writing application : Lavf57.83.100

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5.1@Main
Codec ID : hev1
Codec ID/Info : High Efficiency Video Coding
Duration : 34 min 10 s
Bit rate : 824 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 20.000 FPS
Minimum frame rate : 19.608 FPS
Maximum frame rate : 20.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.020
Stream size : 202 MiB (96%)
Codec configuration box : hvcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 h 9 min
Bit rate mode : Variable
Bit rate : 16.0 kb/s
Maximum bit rate : 128 kb/s
Channel(s) : 1 channel
Channel layout : C
Sampling rate : 16.0 kHz
Frame rate : 15.625 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 7.96 MiB (4%)
Default : Yes
Alternate group : 1