Questions tagged [sync]

Abbreviation for synchronization

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3answers
582 views

How to solve audio/video sync issue on my mp4 screenrecording?

I'm relatively new to video editing and struggling to solve a problem whereas the video (i.e my lips) is out of sync with the audio (i.e my voice). The beginning of the video is fine but by the end ...
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2answers
1k views

FFmpeg: Align Video & Audio of Desktop Capture

I am using FFmpeg's built-in gdigrab & dshow to record the display & audio of my system. I am encoding to uncompressed H.264/AVC video & uncompressed PCM/WAV audio. I had been having two ...
3
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2answers
270 views

Capturing VHS tapes

I bought a Video-2-PC DIY Video Capture Kit which includes a copy of ArcSoft Showbiz 3.5, which I found to be too restrictive and low quality, and VirtualDub 1.9.11.0, which I eventually got to grips ...
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0answers
14 views

How can I record video over an existing video in an “overdub” fashion, keeping them perfectly in sync?

I am trying to figure out if there some way to for me to "overdub" video. What I mean by that is, I want to be able to record a video of me playing an instrument. Then I want to play back ...
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0answers
24 views

How to sync audio with kmsgrab video stream?

I am trying to sync audio from the pulse stereo output with the video from kmsgrab. If I use the video stream as stream one the video is choppy. The command that works best a the moment is: ffmpeg -...
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1answer
14 views

Some parts have audio out of sync after a master export

I have a project in Final Cut Pro X, that plays as I expect in the Final Cut, but when I export in to h264 there is a part where audio is playing slightly in before the video. Such part is present on ...
2
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1answer
20 views

How to combine multiple audio tracks without sounding blasted?

Was going to make a combination of 9 covers of people singing the same song. I have it synced already and it is on sync, problem is its just sound like literal ear ache when played. How to fix?
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1answer
2k views

Setting timecode in Premiere Pro by using file creation date of clips

I have filmed a small rock concert with 4 cameras. One of the cameras was filming short sequences (about 3 mins Clips), then paused for a few minutes and than resumed. Now it is quite a lot of work ...
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0answers
6 views

Audio/Video “Drift” on Mac (even when recording them using separate apps)

I have an older version of Screenflow (ver 6.x) and I find that it's getting so that my videos are falling out of sync with the audio (only noticed this lately, not sure if it is tied to newer ...
8
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6answers
13k views

How to automatically synchronize two recordings of the same event?

Let's say I have two recordings (or more) of the same event. Maybe one has been recorded slightly slower or faster (different "pitch") than the other one and has been started several seconds after or ...
1
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1answer
49 views

How to automatedly synchronize video recording with pre-recorded music track?

When they film music videos ---ones that require the artist to lip sync in cooordination with a pre-recorded song--- do they synchronize the moment that the cameraman hits the record button on the ...
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2answers
91 views

Beginner: what software to combine 2 videos of a dance show

I would like to make a film of our dance show from 2 videos which were shot of it, keeping 1 audio track and the movement synched to the audio. Can anyone tell me what software can do this as easily ...
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0answers
13 views

Auto-combine and sync video of one file, with audio of another

⌘ On Mac, How do I automatically combine 2 files with similar video data, using: 1 file with good video, 1 with good audio, and have them auto-sync via matching video frames? 📄 Provided files Say I ...
1
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1answer
132 views

By how much can video and audio be out of sync?

If I have an interview or lecture style video and the audio is out of sync, by how much can it be out of sync before the average person would easily notice? I'm currently trying to create an HTML5 ...
2
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2answers
1k views

What causes audio sync drift when digitizing VHS?

In the process of digitizing family VHS tapes, amateur video producers often encounter audio drift or skew where the audio track becomes out of sync with the video: It slowly dawned on me that the ...
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0answers
13 views

Seeking for advice with dealing with out of sync audio

I have a bunch of videos from games caputured with NVidia's Share. They are trimmed using VLC. I have one video that is 1 minute and 38 seconds long (a lot longer then the others). If I play it in VLC ...
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1answer
933 views

Imported video getting out-of-sync audio in Adobe Premiere

I have an MKV video with a few out-of-sync points caused, probably, by a 3rd-party program, used to remove some commercials from it directly from the MKV. So watched the video several times in VLC ...
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0answers
80 views

How to compare the audio/video synchronization in video clips?

I have two video clips of the same music video. Both are made of the same video and audio tracks but of different sources and quality. One of them is a rip from an officially released media, so the ...
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0answers
214 views

Audio and video out of sync after hstack/amerge

I am using ffmpeg to combine two videos in one side-by-side. This is a recorded 1:1 video-call (WebRTC); each stream recorded separately by the media server. I've come up with this command, which ...
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0answers
15 views

Post-production editing audio/video out of sync

I am trying to add two videos using ffmpeg and the output video/audio is out of sync (and fast forwarded). Goal is to put intro.mp4 before the original file clip.flv My approach is to Change the ...
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1answer
69 views

How to automate sync of 80-120 audio clips recorded at home on mobile phones?

I want to produce a virtual choir recording of an amateur choir. I want to give 80-120 members of the choir an accompaniment/click track of some kind. They will record themselves, on their mobile ...
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2answers
12k views

OBS Studio: desktop audio falls out of sync

I have an interesting problem: When I stream to Twitch (or record), my desktop audio goes out of sync with the video over time. The microphone is perfectly synced the whole time. Both OBS Studio and "...
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2answers
2k views

Audio/video sync software for Linux (preferably open source)

I'm looking for a program that can synchronize audio and video from separate files. PluralEyes does this. I'm looking for something that runs on Linux and preferably is open source. I imagine a CLI ...
1
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1answer
20 views

syncing slideshow with music

So im currently creating a music oriented slideshow with a bundle of images that needs to be changed each beat of the music. Problem is, the music is 129 bpm which results in 2.15 beats per second. ...
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1answer
579 views

FFMPEG is not trimming the audio to the length of the video

As a follow-up on Video concatenation puts sound out of sync, I have 6 video clips where the audio is 200 ms shorter than the video. The last clip has a chair banging on the floor and serves to ...
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1answer
433 views

Fixing audio/video out of sync when editing recorded broadcast

I have recorded broadcast-ed material using a DVB-T tuner. That produces several TS files per recording (most likely to keep filesize within FAT32 limitations). I have concatenated each recording ...
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0answers
173 views

Adobe Encoder Desyncs Video/Audio (MTS to MP4)

I've been trying to transcode an MTS (recorded on a Panasonic) to MP4 with Adobe Media Encoder. The audio/video has consistently gone out of sync. I've matched the source, gone over all the settings, ...
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1answer
17 views

Absolute Beginner Looking to Produce a Primitive Music Video

I am a total beginner to video. I don't even know what kind of camera I'll be using. (I'll have to borrow one.) I am just looking for an overview of what the general process will look like. I have ...
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1answer
1k views

Video concatenation puts sound out of sync

I have several MOV files from a DSLR camera. I concatenate them with directions from this thread: ffmpeg -safe 0 -f concat -i files_to_combine -vcodec copy -acodec copy temp.MOV where ...
2
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2answers
446 views

Sync picture in picture clips in Davinci Resolve

I'm trying to transition from Lightworks to Davinci Resolve. My question here is about the right way to sync 2 video clips and show them simultaneously. In my case I have a video of a sporting event ...
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3answers
493 views

Decrease FPS of too-high FPS video or increase FPS of too-low FPS video?

I created two videos of the same scene with two different cameras. The issue however is that camera 1 captured everything in 23.85 fps and camera 2 everything in 24 fps. Since I need to synchronise ...
11
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3answers
28k views

Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly

I am using below command to push the video to Wowza server, since we are pushing raw H.264 video, the RTP packet does not have the timestamp, and we could observe audio video sync issue while playing ...
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1answer
6k views

Audio goes a frame or two out of sync after export premier pro

i've finished my film and i'm trying to export my film in 1080p 23.976 fps , using h.264 audio acc 44.100 khz and 192 bit rate . when i export my full film my audio is slightly out of sync/time with ...
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2answers
748 views

Concatenating in sync MP4 (H264+PCM instead of AAC) from a Sony 2018 Camera

I downloaded these files (at max resolution 4K, that is important), in this order: https://vimeo.com/195782736 https://vimeo.com/196725716 https://vimeo.com/195776765 https://vimeo.com/196651176 ...
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0answers
108 views

How to sync drifting audio(s)?

One audio source is the camera, (its sound is more for reference 'cause the distance is approximately 10 meters from the source). The second audio source is a mixing table getting mics. The total ...
2
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3answers
1k views

Does the Sampling Rate affect the syncing process to a video source?

I have recorded interviews using a point and shoot camera for the video and my android phone with Smart Recorder. The camera records in MOV and is uncompress with mono audio. Then I use my smartphone ...
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1answer
313 views

.wmv audio and .mov video out of sync

I'm a total amateur at this video stuff. I'm actually a web developer trying to create a video for work and I've run into a problem. Hoping those of you who know stuff about videography can help me ...
4
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2answers
75 views

Premiere CC 2015 and DVD conversion audio sync issue

Years ago, I transferred a video tape of a live band performance to DVD (using a Sony VHS/DVD RW machine that I no longer own). Yesterday, I edited an 8-minute clip from the DVD. The audio/video sync ...
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1answer
5k views

Long video ffmpeg transcode makes audio go out of sync

I have recorded a 50 minute video, edited it in Hitfilm Express to censor/blur people, and exported it in Hitfilm's high resolution format, generating an 80GB file. When I try to transcode this file ...
1
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1answer
523 views

Audio/Video Out of Sync with Samsung NX1000 Camera - Why?

I'm a total digital video beginner, having a weird (to me) issue in the music videos I've shot with my Samsung NX1000, which is that the video and audio are out of sync with each other, but not in a ...
3
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1answer
2k views

How to sync the dubbed audio to original video?

I have English movie Die hard in English having total length for example 1hour 30minute original time and dubbed movie length 1hour 28minute.how to equalize both audio.apparently it is impossible. how ...
0
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1answer
316 views

Lossless A/V delay with ffmpeg

I downloaded this video but its' audio has approximately a 600ms advance compared to its' audio. How can I fix that in a lossless manner (i.e -c copy) with ffmpeg ?
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5answers
1k views

Most-efficient inexpensive way to speed/slow video track to sync with audio track?

My machines are a few Android tablets (not the newest, but not too old either) as well as a Mac running OS X 10.9.5 (not about to upgrade the OS - long and irrelevant story why). Sometimes I do a ...
3
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1answer
3k views

Add timecode information to file

I'm writing a program that interprets LTC timestamps from audio channels in video files. The goal is to remove the LTC track and replace it with some kind of native timestamps directly in the video ...
8
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3answers
1k views

What is the best way to plan and sync voiceover?

I'm working on an informational video which has some live action product shots, animation created in flash, a backgroud music track, and a voiceover track. I've got total control over everything so I ...
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1answer
2k views

How do you batch merge many clips in a premiere pro timeline?

I'm sure there are other use cases for this as well, but the major one that I can think of is creating a bin out of the synced sequence pluraleyes creates. When pluraleyes syncs your footage with ...
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0answers
136 views

project 3 separate videos synchronized

For an art installation I need to set up a synchronized projection of 3 separate videos: hardware 1 PC with Windows 7 NVIDIA GeForce GTX 980 with 4 simultaneous outputs 3 projectors 1920 x 1080 (I ...
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1answer
95 views

How long should video clips be to be in sync with a 90 BPM song?

I am making a home vacation video set to music. The song I selected has a BPM of 90. I want the video clips to match the beat, so for example, every time you hear the beat a new video clip begins. ...
1
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0answers
480 views

Is there a container format in ffmpeg that supports non-monotonous timestamps?

I have recorded over-the-air digital TV broadcasts from my own antenna. Due to reception blips, the MPEG-TS file can have corrupted packets, and thus corrupted timestamps, in the middle of a ...