All Questions
64
questions
0
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62
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Automatically synchronize two audio streams with ffmpeg
Say I have a video of a talk but the soundtrack is bad, and I happen to have an audio recording of the same talk made with a good mike. Is there a way, with ffmpeg, to replace the bad audio with the ...
- 137
1
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0
answers
56
views
How to create timestamps for raw H264 to make it VFR using audio as reference?
I had an MP4 screen recording which got corrupted (missing moov atom).
I tried untrunc, recover_mp4_to_h264 and MP4Fix, and the latter gave me a complete result.
However, the result was pure h264 and ...
- 131
2
votes
0
answers
2k
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Remote desktop audio lag
Why when using remote desktop, when playing a video, my keyboard executions are almost perfectly in sync with the image on the screen, but the there is like a 1 second audio delay and sometimes 2 ...
- 131
0
votes
1
answer
314
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Easiest way to add a 3 second delay, every 30 seconds, in a subtitle to sync it with a video?
I need to sync a subtitle with a video.
By trial and error, I figured out that the subtitle needs a delay of 3 seconds, every 30 seconds. Is there an automated way to do add this delay? I am somewhat ...
- 333
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0
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82
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How to force audio not being delayed compared to video while processing ffmpeg filters?
I apply zoom filter on a 2k video but I've noticed the audio doesn't go with it. It's slightly delayed. I guess it's an issue with my cpu or gpu because there are lot of processing.
ffmpeg -i e:/vid....
- 139
0
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0
answers
513
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How can I sync the frames of multiple videos from a multi-camera capture system using FFMPEG?
I have a multi-camera capture setup with 2 canon cameras. Each of these cameras have a tentacle sync e timecode generator connected to them.
After a video capture with these 2 cameras, the generated ...
1
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0
answers
376
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How to detect in real-time, whether there is an audio video sync or lag using FFMPEG?
I'm not asking about how to fix an audio video sync issue or lag. That I'll figure out, using FFMPEG's timeline editing filter. My question is about whether there is a way to detect if the audio and ...
- 1,089
1
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0
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1k
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Demux video and KLV data from MPEG-TS stream, frame-by-frame, in sync
I need to demux the video frames and KLV data from an MPEG-TS stream in sync, frame-by-frame.
The following command to demux the KLV data and outputs a text file with the KLV data.
gst-launch-1.0 ...
- 21
0
votes
2
answers
1k
views
Can ffmpeg automaticaly align audio and video tracks
I have searched and found many similar questions, but not this one. I've experimented and can't come up with an answer.
I have a Standalone "Digital TV Converter Box". This receives ...
- 165
2
votes
1
answer
1k
views
How to do automatically transfer subtitles from one video to another ? (based on video stream)
I have the following :
a mkv file (let's call it A) with video, audio and subtitles correctly synchronized.
another mkv file (let's call it B) with video and audio also synchronized but without ...
- 931
0
votes
0
answers
1k
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Fix TS File Audio Sync Issue Using FFMPEG
I have a few .ts files which I've downloaded from the web that I want to chop up into smaller files. I'm using FFmpeg to do this, but each time, after about 3 minutes the video starts to fall behind ...
0
votes
1
answer
2k
views
Run ffmpeg in parallel for synchronization in rtsp streaming
I am trying to receive videos from three cameras via rtsp. We use ffmpeg with multiple outputs how ffmpeg explains, but the delay is worse than we run directly three different linux processes, is ...
- 103
2
votes
2
answers
1k
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ffmpeg - video and audio out of sync
This seems to be a common problem, but the answers I found don't seem to apply to my situation.
I'm merging 6 videos (one of them is a short background that loops) into 1 output video, and the audio ...
- 163
1
vote
1
answer
2k
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2020: To quickly and efficiently play an external audio track in sync with a video?
To quickly and efficiently play an external audio track in sync with a video?
How to play a video with a different audio track?
https://superuser.com/a/1077106/183467
Tried this, but the last step ...
- 991
0
votes
1
answer
2k
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Is there a way to make VLC time sync a video on separate computers, each having a local copy of the video?
My friends and I are trying to watch a video that we all have on our machines, and would love to all have it timed together without the hassle of manually doing it. Is there a VLC plugin or tool that ...
