Thunderbolt8
13th November 2008, 23:27
got 2 questions when syncing one kind of audio track for a movie with another kind, here flac with a fixed bitrate track (like DTS-HD HiRes). I'm not a native speaker, so its difficult for me to express what I exactly mean. but I uploaded 2 pics to indicate what I am refering to (use full screen view (pic res is 1280x1024)), here:
http://thumbnails9.imagebam.com/1825/67d0e818249557.gif (http://www.imagebam.com/image/67d0e818249557)
http://thumbnails11.imagebam.com/1825/827e5018249558.gif (http://www.imagebam.com/image/827e5018249558)
the first question refers to the first pic, to the red circled area of both track, with '1' above. I believe this to be a sync point for both tracks, but as you can see for the flac track the digits are above the green middle line, while they below it in case of the flac track. what is the reason for that? Or does this maybe mean that I need to shift back/ahead 1 intervall of one of the tracks, so that in both cases the dots both need to point in the same direction in order to have complete syncronisation?
the second question refers to the yellow circled area with '2' above. I zoomed in one more time in the 2nd picture. at first I tried to take this area as sync spot, but I wasn't sure if they correspond. Theres a whole block for the DTS-HD track, while theres only 1 single digit for the flac track. there are 2 questions now: do/can these spots nevertheless correspond, as there is maybe only '1 real spot of sound' as the 1 flac digit shows, while the dts-hd track for fixed bitrate reasons needs to show a whole block of data there, while only of of these dots might be real audio data? as the 2 arrows then indicate, in case it also would be possible to sync from that point on, where would I have to link that 1 flac dot to then, to the beginning or the end of that DTS-HD block?
I realise, when comparing both pics the differences are merely between 3 ms and absolutely not distinguishable for human ears. but I'd still like to know as matter of principle to do it right and not get confused and maybe get distracted too far from the real delay value in other cases.
http://thumbnails9.imagebam.com/1825/67d0e818249557.gif (http://www.imagebam.com/image/67d0e818249557)
http://thumbnails11.imagebam.com/1825/827e5018249558.gif (http://www.imagebam.com/image/827e5018249558)
the first question refers to the first pic, to the red circled area of both track, with '1' above. I believe this to be a sync point for both tracks, but as you can see for the flac track the digits are above the green middle line, while they below it in case of the flac track. what is the reason for that? Or does this maybe mean that I need to shift back/ahead 1 intervall of one of the tracks, so that in both cases the dots both need to point in the same direction in order to have complete syncronisation?
the second question refers to the yellow circled area with '2' above. I zoomed in one more time in the 2nd picture. at first I tried to take this area as sync spot, but I wasn't sure if they correspond. Theres a whole block for the DTS-HD track, while theres only 1 single digit for the flac track. there are 2 questions now: do/can these spots nevertheless correspond, as there is maybe only '1 real spot of sound' as the 1 flac digit shows, while the dts-hd track for fixed bitrate reasons needs to show a whole block of data there, while only of of these dots might be real audio data? as the 2 arrows then indicate, in case it also would be possible to sync from that point on, where would I have to link that 1 flac dot to then, to the beginning or the end of that DTS-HD block?
I realise, when comparing both pics the differences are merely between 3 ms and absolutely not distinguishable for human ears. but I'd still like to know as matter of principle to do it right and not get confused and maybe get distracted too far from the real delay value in other cases.