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Questions tagged [sync]

Abbreviation for synchronization

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19 votes
4 answers
58k 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 ...
shafi's user avatar
  • 343
11 votes
5 answers
48k 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)....
Zeno's user avatar
  • 161
10 votes
1 answer
12k 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 ...
Alessandro Amato del Monte's user avatar
8 votes
3 answers
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 ...
Ryan's user avatar
  • 541
8 votes
6 answers
15k 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 ...
Olivier Bruchez's user avatar
7 votes
5 answers
2k 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 ...
Sophia_ES's user avatar
  • 171
6 votes
1 answer
9k 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 ...
trinkner's user avatar
  • 163
6 votes
4 answers
5k 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 ...
Peter Cordes's user avatar
  • 2,769
6 votes
4 answers
4k 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 ...
octuplex's user avatar
6 votes
1 answer
10k 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 ...
Kozuch's user avatar
  • 210
6 votes
1 answer
979 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 / ...
roy's user avatar
  • 163
5 votes
5 answers
8k 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 ...
elhombre's user avatar
  • 151
5 votes
1 answer
281 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 ...
nonsensation's user avatar
5 votes
3 answers
475 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 ...
mythofechelon's user avatar
4 votes
1 answer
131 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 ...
JonYork's user avatar
  • 141
4 votes
2 answers
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 ...
Voxwoman's user avatar
  • 143
4 votes
3 answers
744 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 ...
Claudiu's user avatar
  • 141
4 votes
2 answers
618 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.
moala's user avatar
  • 151
4 votes
1 answer
4k 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 ...
Sloloem's user avatar
  • 161
4 votes
1 answer
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),...
WoJ's user avatar
  • 143
3 votes
1 answer
2k views

ffmpeg to cut subtitle file in sync with the cut video

I managed to cut the video and keep subtitle in sync by embedding the subtitles in the video: $ ffmpeg -i sample-mp4-file.mp4 -hide_banner \ -vf subtitles=subtitles.srt -ss 0:30:00 -t 1:33:31 \ ...
xpt's user avatar
  • 195
3 votes
2 answers
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, ...
Jodes's user avatar
  • 135
3 votes
2 answers
491 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 ...
Sathyaish's user avatar
  • 283
3 votes
2 answers
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) ...
Ben Brocka's user avatar
3 votes
2 answers
3k 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 ...
GiddyUpHorsey's user avatar
3 votes
1 answer
6k 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 ...
iter's user avatar
  • 251
3 votes
1 answer
801 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 ...
Cloud's user avatar
  • 133
3 votes
1 answer
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 ...
mir.moezi's user avatar
  • 141
3 votes
1 answer
221 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, ...
Farzad's user avatar
  • 343
3 votes
1 answer
808 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 ...
Kozuch's user avatar
  • 210
3 votes
3 answers
148 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 (...
Matthew Frazier's user avatar
3 votes
2 answers
338 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. ...
palako's user avatar
  • 133
3 votes
0 answers
102 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 ...
Daniel's user avatar
  • 131
3 votes
1 answer
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 ...
slartidan's user avatar
  • 131
2 votes
3 answers
8k 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 ...
pkamb's user avatar
  • 127
2 votes
1 answer
54 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?
antuK3n's user avatar
  • 23
2 votes
3 answers
4k 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 ...
iter's user avatar
  • 251
2 votes
3 answers
2k 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 ...
Mr A's user avatar
  • 153
2 votes
2 answers
759 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 ...
Erik D.'s user avatar
  • 23
2 votes
1 answer
5k 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 ...
BrettFromLA's user avatar
  • 1,589
2 votes
1 answer
1k views

Lossless HDCP stripper?

Is there a product that allows you to strip HDCP from HDMI and that does not loose quality?
sorin's user avatar
  • 173
2 votes
1 answer
93 views

Is there a standard for multi-camera, high-speed video?

I develop an application to record from multiple high-speed (e.g. 200 fps) cameras simultaneously. Typically, the frame rate of these cameras is constant but this is not necessarily the case. ...
Andrew Straw's user avatar
2 votes
2 answers
632 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 ...
Scott's user avatar
  • 133
2 votes
1 answer
368 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 ...
Ishay Frenkel's user avatar
2 votes
1 answer
123 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. ...
Sid Buyyanapragada's user avatar
2 votes
1 answer
105 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 ...
Fabricio's user avatar
  • 121
2 votes
2 answers
2k 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 ...
AntumDeluge's user avatar
2 votes
0 answers
877 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 ...
acker9's user avatar
  • 131
2 votes
0 answers
47 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 ...
evn's user avatar
  • 81
2 votes
0 answers
1k views

How can I mux video and audio from separate sources that're at different frame rates?

I'm having trouble muxing the video from one source with the audio from another because the audio drifts over time. As I mentioned in the title, the sources are at different frame rates, the video's ...
Rapta's user avatar
  • 21