Questions tagged [sync]

Abbreviation for synchronization

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10
votes
5answers
32k views

Losing audio/video sync in Adobe Premiere with mp4's

I have two videos to combine in Adobe Premiere. They play okay in a video player, but putting them into Adobe Premiere CS6 suddenly makes the audio unsynced with the video (even in the Source Monitor)....
7
votes
3answers
813 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 ...
6
votes
3answers
3k views

Sync separate audio to video+bad-camera-audio, free NLE recommendations

My use-case, in case the details help people understand what I'm looking for: My brother needs some videos of him singing while playing the piano, to send in as an audition for a dinner theater. For ...
6
votes
4answers
3k views

Video desyncs with the audio over time

I record footage with OBS and do voiceovers recorded in audacity. I process the audio in audacity, then sync the audio with the video. However, since I started doing it this way, the audio and video ...
6
votes
1answer
8k views

Low cost frame synchronized (genlocked) 3D stereo camera

I am trying to capture stereo video with 2 Microsoft LifeCam Studio USB webcams. Thus far, the best approach I've managed to come up with is my own tool written using OpenCV to capture video streams ...
6
votes
5answers
804 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 ...
5
votes
5answers
6k views

How to record a slide presentation efficiently with video/audio

I am making some video slide presentations (~15-30 minutes) which consists of a lot of animated slides and my voice. I made a test video to see where problems occur when doing such a project. It was a ...
5
votes
1answer
196 views

Sync Video to Audio in SonyVegasPro13 with multiple anchors

I have a sample recorded with half speed at 60fps (for better quality later on), which is my video track. Then I seperately recorded the audio track at normal speed. I imported the video track into ...
5
votes
1answer
653 views

Trying to sync audio in mpeg2 video whose video freezes first 8 seconds in playback

So I have a handful of old mpeg2 (.mpg) files with the following profiles as provided by ffmpeg (the timecodes on each are different): Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / ...
5
votes
2answers
9k 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 ...
4
votes
1answer
5k views

ffmpeg concat introduces a/v sync problem

I have one 2-hour video file and want to add a 10-second title sequence to its start. The long file has perfect a/v sync from start to finish. However, when I use ffmpeg -f concat -i mylist.txt -c ...
4
votes
1answer
116 views

Recording video's with two cameras?

I have started to make some videos and I want to add a second camera to get a different angle. The main camera I have is a Nikon D7200. I am looking at a secondary camera, but I am hesitant because ...
4
votes
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 ...
4
votes
3answers
549 views

How can I record audio & video synced with another audio file?

I want to record a drum cover. I have three input sources: a camera, the output of my electronic drum kit (computer registers it as a microphone), and an existing audio file (the song). I want to ...
4
votes
2answers
288 views

Sync audio and video, equipment?

I need some help or tips in the area of video and audio sync. Think a music videoclip, where the audio is recorded independently to create a master audio track and then the video will follow along. ...
4
votes
1answer
1k views

ffmpeg concatenation introduces video stutter but does not affect audio

I've gone through several different variants of this process and it always causes me problems. I've gotten it working sometimes but it doesn't seem to be consistent. I have a video camera which ...
4
votes
1answer
1k views

synchronizing video and audio in a remuxed MKV

I am quite new in the area of audio/video manipulation so apologies if the question is obvious. I did not manage to find an answer online, though. I have a MKV file with several tracks: video (MPEG4),...
3
votes
3answers
10k 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 ...
3
votes
1answer
3k views

Remove flickering due to artificial light with ffmpeg

I have video footage shot at shutter speeds of 1/30s under artificial light here in Europe where the AC is 50Hz. Flicker occurs -- obviously I should have used 1/25s or 1/50s but I didn't, and want to ...
3
votes
2answers
449 views

How do I match the audio and video streams in my video file with the audio I recorded separately?

I record audio separately using an audio recorder and video separately and they usually sync up later in the NLE painlessly. But there's one particular old digital camera I have that always seems to ...
3
votes
2answers
2k views

Fixing desync in a large, long video file

I've got some moderately large, compressed video files (~2+ gigs, over an hour long) from a few Open Broadcaster Software streams to Twitch.tv. All output files (including the twitch archive's export) ...
3
votes
2answers
2k views

How can I sync two videos together in Corel VideoStudio Pro X3

I have two videos of a dance at a dance competition taken by two different people. The videos are of the same dance but are from different angles. I want to create a single video that contains both ...
3
votes
2answers
413 views

Negative SMPTE timecode drop-frame handling?

How are negative timecodes handled with drop-frame: Is the frame before -00:00:59:29 labelled -00:00:01:02 (symmetric), or Is the frame after -00:01:00:01 labelled -00:00:59:28 (regular)? Thanks.
3
votes
1answer
114 views

Subtitles do not match spoken dialogue. Why?

I have been watching a lot of shows on Netflix lately in French, (please note the original language is English, so it is dubbed) with French subtitles. I find that the subtitles rarely match what is ...
3
votes
1answer
1k 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 ...
3
votes
1answer
178 views

How to sync motion and music in After Effects

There's a video of a man, drawing something. There's a violin symphony music. I want to sync the video, I mean the movements of hand with the symphony. For example, I want the hand to move fast, ...
3
votes
1answer
679 views

GoPro Dual HERO 3D stereo system only compatible with HERO3+ Black Edition units?

I need to shoot stereo video in perfect sync. I realized that GoPro offers Dual HERO System but they only list compatibility for HERO3+ Black Edition units. So I assume the currently selling cheaper ...
3
votes
3answers
124 views

Is 0.0036% time inaccuracy on a consumer-grade camcorder expected?

I did an experiment on our church's camcorder (Sony Handycam HDR-CX380) recently to test whether it was the source of a time inaccuracy between our video recordings and PC audio recordings of sermons (...
3
votes
0answers
87 views

Video and Telemetrics not in sync

I've recorded a video with Raspberry Pis Camera Module. On top of that I've recorded GPS data including the GPS Timestamp and made my own data file. Using Dashware I've tried to get the video and ...
2
votes
2answers
2k views

Techniques and technologies for synchronizing multiple audio and video streams

I'm hoping to produce an amateur movie. I may be renting some equipment: (professional camera, microphone and digital recorder) but I hope to primarily use my own equipment: camera phones, ...
2
votes
3answers
874 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 ...
2
votes
2answers
494 views

How is 29.97 timecode generated over a full day without frame errors?

A quick primer:American television was originally broadcast at 30 frames per second. In order to accommodate color information without losing backward-compatibility with B&W televisions, the ...
2
votes
1answer
4k views

link multiple audio tracks to one video track in Premiere CC

I shoot TMZ-type webisodes, where multiple people are throwing jokes around a news room. I'm considering buying 4 lavaliere mics for my 4 performers so I can isolate their audio during editing. I ...
2
votes
1answer
901 views

Lossless HDCP stripper?

Is there a product that allows you to strip HDCP from HDMI and that does not loose quality?
2
votes
1answer
1k 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 ...
2
votes
1answer
212 views

2 videos out of sync

I recorded myself using my camera (canon ixus 117hs, 23.98fps) and also recorded my LG G3 using AZrecorder (records the screen at 55.58fps). I tried to sync both videos (using premiere pro cc) and at ...
2
votes
1answer
92 views

what software & How to Synchronize sequence pictures with audio and make it a video just like gif image

I recently went on vacation with my family, and while capturing pictures I took some in sequence like in burst mode, for example, I took 4 pictures while the person turned his head from left to right. ...
2
votes
1answer
99 views

Sound sync problem

I have a bizarre sound synchronization problem which I am really puzzled with. I recently recorded an interview with the video camera capturing the sound of the interviewed and an external sound ...
2
votes
0answers
31 views

Synchronize Video / Audio with different numbers of audio channels

I have a main video recording and audio recordings from 2 phone-based lav mic's. One subject's lav recording has 2 audio channels and the other has 1. (The video also has 1 audio channel) I can ...
2
votes
1answer
207 views

Identifying source of audio drift between camcorder and recording PC

I'm recording our church's sermons using a standard consumer-grade camcorder (Handycam HDR-CX380). Depending on mixer circumstances (our church moves around a lot), I'll either run a line from our ...
2
votes
1answer
53 views

Why is my Sony Alpha 6000 not synchronzing with other recorders?

Using a Canon 70D and a couple stand-alone audio recorders, I have no trouble matching footage between the different devices. With the Sony Alpha 6000, I can't line them up on the Premiere timeline: ...
2
votes
0answers
262 views

HyperCam2 video out of sync, ffmpeg throws video out of bounds

I've recorded my over 2h presentation using HyperCam2 but output video is totally out of sync with audio. It looks like video is 2x faster than audio so I have 'Thanks for watching' slide in the ...
2
votes
0answers
347 views

recording multiple video feed with timecode/genlock in sync with motion capture system

So, I am looking into recording 2 HD video streams, as reference for our mocap studio. The thing is that I don't know much about video gear, and it must be fairly cheap. I have asked Vicon (mocap ...
2
votes
0answers
203 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 ...
2
votes
0answers
192 views

segment does not contain sync frame

Whenever I split a video using Apple's mediafilesegmenter, using the following command: medifilesegmenter video.ts -t 10. I get the following error for each segment except the first: segment does not ...
1
vote
4answers
868 views

Sync several movie clips with one audio file

Have several video clips from DSLR with terrible sound, and one audio file from zoom. It was a bend concert. Zoom was recording all the time but clips are separated, as there were breaks from song to ...
1
vote
1answer
37 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 ...
1
vote
1answer
428 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
vote
1answer
3k 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 "...
1
vote
1answer
443 views

Syncing Shogun Footage with PluralEyes?

I can't get my video footage to sync with my audio in PluralEyes 3. Here's what I tried... I shot some interviews today using a Sony a7s and Atomos Shogun. I recorded almost everything through the ...