Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Looking for a free tool to sync second audio track to video (Read 1020 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Looking for a free tool to sync second audio track to video

I am looking for a free tool to sync second audio track to video.
I have a set of videos that have audio and video and I'm adding a second audio stream to that. The original videos have excess stuff at the beginning of various lengths. If this length was always the same, I'd have no trouble to batch program this.
What I'm doing now is I playback the original video in MPC-HC with milliseconds visible, find the spot where the second sound source should begin, note the time and then use that time as a parameter for ffmpeg to cut the excess. Sometimes I need to repeate the process a few times, because I don't always get it right the first time. Cumersome, especially since I have ~100 videos to process.
I have tried Shotcut and the likes, but since I'm not into video editing, I can't figure out how to do this. So, I need either a guide for dummies for Shotcut or some other software suggestion that can help me.
I'd like to open the existing video, add the second audio and be able to just drag the second audio to the place where it's supposed to be and then export that as a new video.
Shotcut, DaVinci Resolve, etc. all promise this is what you can do, but I'm just not smart enough, apparently.
lame -V 0

Re: Looking for a free tool to sync second audio track to video

Reply #1 –
If your container is matroska, you can use mkvtoolnix.
It delay/stretch every stream independently.
Plus, you does not reencode any of streams - it is loseless.
MPC plays correct the product MKV but VLC and MX Player not.
See: https://hydrogenaud.io/index.php/topic,123051.0.html