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Can I put an FCP video file and an ac3 audio file through Compressor to get a combined result?
Hi we are making digital movies of comedy performances on HDV, editing them multiclip on FCP, and successfully putting them through Compressor 3.5 to export as an MPEG2 program stream at 25mbits. These files are then shown in digital cinemas throughout South Africa. For our latest project we recorded with multiple mics and had a sound engineer make all the audio into a 5.1 surround ac3 file, which he used Nuendo for. I thought it would be great to combine the video and audio in FCP but Cow herd deluxe Tom Wolsky told me FCP doesnt support ac3, so the thought is to put the FCP .mov file and the ac3 file into Compressor separately, and have Compressor make an MPEG2 file with audio in ac3. But when I try this I get either the audio or the video in preview, not both together. I would be so grateful for advice, the machine I am making the FCP file on is a 4×2.5ghz powerpc G5 using FCP 6.0.6 on OS 10.4.11. Compressor is being used on a2.66ghz Intel Core 2 Duo iMac running OS 10.6.1 and using Compressor 3.5 with FCP 7.0.
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10 Replies
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I am not a compressor guru, but I don’t think it is capableof such a task.
If it was me doing it I would, MPEG encode my video in compressor then mux my mpeg and ac3 into a single TS in MPEGStreamclip.
If i recall correctly, if you have the mpeg and ac3 with the same filename, in the same directory, MPEGstream clip will auto open both… then you can just hit ‘Convert to TS’
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You can put audio and video together with Compressor but only if the audio is MPG-2.
If the audio is PCM or AC3, the only way (I think ) to put the two files together in a single file is with a DVD/BR authoring tool.
So I think that you need to toast a disk or at least to play some kind of disc-image, Video_TS folder or so.[Paul Tilsley] ” Tom Wolsky told me FCP doesnt support ac3, so the thought is to put the FCP .mov file and the ac3 file into Compressor separately, and have Compressor make an MPEG2 file with audio in ac3.”
Is not like that.
You just need to process the picture in Compressor. You get a .m2v. That is an standard MPEG-2 solo video.
You need to bring that .m2v WITH THE AC3 THAT YOU ALREADY HAVE and bring them to DVDSTP (I guess Roxio can do it too) and put them together. I guess is possible to export some kind of playable file.
Cheers,
rafael -
thanks Rafael will try this
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thanks indeed PP another innovative idea, will try this too
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You can also use Quicktime Pro to mux the file. Download the ac3 codec for quicktime. You can get it here https://www.afreecodec.com/mac/123/quicktime-ac3-codec/ then just open the movie in quicktime. Make sure that the movie is at the beginning. Then drop the AC3 file onto the quicktime window and “save as”
Thanks,
Rob Brambila
Director of Technology
ProMAX Systems
rob.brambila@promax.com
http://www.promax.com -
I originally thought Paul was going to DVD, which is why I suggested Compressor.
Will this technique make a muxed MPEG-2 file, or a QuickTime file with an MPEG-2 video track and ac3 tracks?
All the best,
Tom
Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 4 Editing Workshop” -
to make a muxed file simply export after you save. I think his delivery is for digital cinema playout.
Thanks,
Rob Brambila
Director of Technology
ProMAX Systems
rob.brambila@promax.com
http://www.promax.com -
In purity “Muxing” is only when you put together a video-MPEG-2 (.m2v or so) and MPG-2 Audio.
They get muxed together in a single MPEG-2 file.
The way that Rob points seems very interesting. I guess that QT just “Add” the audio to the video. If that works with .m2v and .ac3, great. You don’t need to make any kind of VIDEO_TS or other container.
Cheers,
rafael -
Muxing is actually short for multiplexing, which is to combine multiple into one. But, I think the original poster is not finishing to DVD. The container would be .mov or whichever they choose, based on what the DC player can play out. Digital Cinema Specs however specify jpeg2000 with a MXF wrapper.
Thanks,
Rob Brambila
Director of Technology
ProMAX Systems
rob.brambila@promax.com
http://www.promax.com -
[Rob Brambila] “Muxing is actually short for multiplexing, which is to combine multiple into on”
Right. This is what happens in MPEG-2: The audio filles the Layer 1 of the file, making a single MPEG-2.
In a VOB and so, the .m2v or similar, gets just packaged or paired together. You an put AC3 or PCM.
Cheers,
rafael
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