Hallo Jogen,
vielen Dank für deinen Hinweis.
Ich habe deinen Rat befolgt, aber wenn ich das fertige und ausgespielte Video zur Kontrolle wieder in Premiere importiere ,A1 auf L-100 und A2 auf R100 drehe, ist das Video am lautesten Punkt -12dB. In der Sequenz waren es aber -9dB. Lasse ich bei der Kontrolle A1 und A2 bei 0,0, hat das fertige Video am lautesten Punkt -6dB.
Anbei je ein Screenshot zu meinem Mischer wenn ich die Pan-Regler verstelle und zu meinen Exporteinstellungen.
Hier noch etwas aus dem englischen Forum. Es geht teilweise in die selbe Richtung, aber ich verstehe leider nicht alles. Es sind drei verschiedene Ansätze, wenn ich mich nicht irre:
Post 1:
Yes, just did a little test. -18dB tone feeding left & right of sequence - exported as DNXHD 25P SQ MXF OP1a
Reimported (it flagged as 2 x mono tracks) - plays fine at -18dB in source monitor on both channels.
Dragged onto 'create new sequence' - defaults to DNX SQ timeline with 4 *standard* audio tracks - thus:
a. both mono tracks are attenuated (reduced) by 3dB
b. The standard tracks are centre panned (as they are really 'stereo' tracks)
c. The two channels summed to centre should be +9dB but the attenuation reduces that to +3dB
So your levels are not unity and your tracks are now summed (which you may not want)
Your answers are to either:
a. modify the track mixer so it pans left & right and increase gain on both tracks by +3dB
b. modify the clip to be 'stereo' before editing into the sequence (thus track 1 will be left, track 2 will be right and there will be no attenuation)
c. create a sequence with mono tracks, panned alternate left and right in the track mixer, before cutting in your exported clip.
Audio in PP is powerful but a little bit farked in places & tricky in others. I've often taken over edits where the music & fx are mono because the previous editor didn't understand this.
Post 2:
Premiere Pro will automatically attenuate audio by 3 decibels when doubling mono content across two stereo channels, or when combining (i.e. down mixing) two stereo channels to a single mono destination. This comes from many standards for down mixing content (e.g.
https://www.itu.int/dms_pubrec/itu-r/re ... !PDF-E.pdf) to mono. However, many Premiere users will find themselves in a situation where the mono-to-stereo duplication or the stereo-to-mono attenuation happens without it being obvious to the user.
For example, if you have an 8 channel MXF file that comes in to Premiere as having 8 individual mono clips, if your sequence doesn't have enough tracks for those 8 clips, it will often automatically create the extra tracks needed to accommodate the number of clips. Unfortunately, these are mono clips (on clip per channel in the original file), but Premiere (by default) will create Stereo clip tracks. At this point, you're taking a mono clip, placing it in a stereo audio pipeline for the stereo audio clip track. So we have to duplicate the content into the Left and Right channels of the track. However, you're effectively doubling the audio at that point, so it is common (and even standardized) to attenuate by some factor. The number isn't exactly 3 decibels, it is actually based off of a linear multiplier of the square root of 1/2 (0.7071067811865476...). This comes out to be about -3.0102999566398116... dB. At any rate, the proper way to get around this is to create mono audio tracks for the mono clips and there will be no gain changing. The same would happen if you put a stereo clip (e.g. a stereo music MP3 file) on a mono audio track. Premiere has to down mix the stereo content to fit into the mono audio pipeline for that track. Again, from the standards, a 3 dB attenuation is recommended.
TLDR: Put mono clips on mono tracks, put stereo clips on stereo tracks.
Jogen hat geschrieben: ↑Fr 22 Jun, 2018 21:52
Hi Marco,
3 dB Unterschied: das wird daher kommen, dass Du bei der Kontrolle des fertigen Videos Deine Audiospuren nicht als separate Spuren auf L/R gepant hast, also Pan-Regler 1 nach links und Pan-Regler 2 nach rechts im Spurmischer "drehen", dann bekommst Du wieder Deine vorherigen Werte.
Gruß Jogen
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