How to know delay between sound track?

bokbokchui · 26th February 2011, 08:04

I have a MKV file with AC3 audio track perfectly synced with video.

I have another DTS sound track extracted from the DVD source of the same movie and want to add it to the MKV file. If I just add the DTS sound track using mkvmerge, the DTS sound track is a bit out-synced with the video.

I know that I can use player like VLC Player to adjust the audio delay of the DTS audio track while playing to get it synced, but it seems a try and error approach and may not be very accurate.

While I know that the AC3 audio is perfect while the DTS audio is a bit out-of-sync, are there any tools which can calculate/compare and get the audio delay between the two audio tracks so that I can get the audio delay to be used in mkvmerge?

Thanks

tebasuna51 · 26th February 2011, 12:34

You can decode the ac3 and dts and compare the uncompressed audio, you only need 1 channel, in Audacity (or other audio editor).
You can see the delay between the same sound (a shot/hit ...)

yetanotherid · 28th February 2011, 01:58

When converting, many/most programs include the audio delay used as part of the file name of the extracted audio track. You could probably start another DVD encode using the dts track as the audio, then once it's extracted look at the file name and use the appropriate delay value.

26th February 2011, 08:04	#1 \| Link
bokbokchui Registered User Join Date: Jan 2004 Posts: 16	How to know delay between sound track? I have a MKV file with AC3 audio track perfectly synced with video. I have another DTS sound track extracted from the DVD source of the same movie and want to add it to the MKV file. If I just add the DTS sound track using mkvmerge, the DTS sound track is a bit out-synced with the video. I know that I can use player like VLC Player to adjust the audio delay of the DTS audio track while playing to get it synced, but it seems a try and error approach and may not be very accurate. While I know that the AC3 audio is perfect while the DTS audio is a bit out-of-sync, are there any tools which can calculate/compare and get the audio delay between the two audio tracks so that I can get the audio delay to be used in mkvmerge? Thanks

26th February 2011, 12:34	#2 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 7,471	You can decode the ac3 and dts and compare the uncompressed audio, you only need 1 channel, in Audacity (or other audio editor). You can see the delay between the same sound (a shot/hit ...)

28th February 2011, 01:58	#3 \| Link
yetanotherid Banned Join Date: Apr 2008 Posts: 723	When converting, many/most programs include the audio delay used as part of the file name of the extracted audio track. You could probably start another DVD encode using the dts track as the audio, then once it's extracted look at the file name and use the appropriate delay value.