Audio drop out and picture wobble during export to tape

I use a camera to capture footage from DV tapes - it's its only job and is always connected to the Mac.
But when playing back the footage from the FCP 4.5 timeline to make a back up DV copy of a finished job it all goes awry.
The audio cuts in and out - from normal audio to silence and back again at no regular intervals but every few seconds.
The picture wobbles just as though the camera isn't getting enough power (it is connected to the mains)I watch the playback with the camera's flip out screen.
On the computer it all looks fine. Playing back the DV tape shows me what I saw on the flip out screen - a wobbly picture with intermittent sound.
The cables are good. The camera works fine in all other respects, the external firewire drives work fine, the computer is good.
I'm stumped! I can't export to tape any more...
But exporting the files via compressor to make DVDs is fine - no problems.

Playing back the DV tape shows me what I saw on the flip out screen - a wobbly picture with intermittent sound.
The cables are good. The camera works fine in all other respects, the external firewire drives work fine, the computer is good.
Not quite sure how you reach your conclusion in the second paragraph. If it displays fine on the computer and is TOTAL JUNK after it heads out the firewire cable - I'd start with every piece of equipment that connects to the computer. Time to do A/B testing. find another camera, A-DV converter, firewire cables, even the computer and test each element.
good luck.
x

Similar Messages

Audio drop outs and continuing problems- Apple Support informed again.

Hi All,
Have had various audio problems with iMovie transfer to iDVD 6. iMovie had the problems initially but a weird trick seems to be helping me.
Copy a random new audio track into my film, paste it, then cut it out then empty trash..... all of a sudden my audio is clean again and perfectly in time with the video. I have informed the iMovies people in Ireland and they are at a loss to explain why this is now ok.
BACK to the plot and iDVD 6.
When I try to export this project from iMovie in iDVD 6 it either becomes an audio garbled nightmare or if I try and import into iDVD 6 I get audio that gradually becomes out of sync with the video visual. I know that this project was recorded in 16 bit audio so no joy there.
I've told Apple in Ireland that there are major audio issues with iDVD 6's audio set up + something they were apparently unaware of. I was assured that the tech dept's would investigate and solve. I am really surprised that they hadn't seen this problem in this forum!!
In the meantime any advice is very gratefully received. I'm on an Intel G5 Imac with 1.83ghz 1Gb sdram and 250 GB HD. So Software is currently limited!! I desperately need to get this project to DVD!!!!
Many thanks,
GUY

SAME EXACT THING HERE. This is what I posted in a diff thread:
2013 iMac 1TB Flash Drive
OS 10.8.5
Constant audio drop outs using Apogee Duet. I have to unplug and replug several times to get the system to recognize it. Sometimes when it is connected, Audio Prefs doesn't even recognize it and it shows up as "Unknown". When I click Audio Prefs before I get in, I get the spinning beachball and it takes a while for it to open. I have been in touch with Apogee but to no avail. It seems to work on my 2013 Macbook Pro, but I haven't tested extensively. It seems to get tripped up if I'm working in Ableton and get a Facetime call or if I try to use Youtube / Soundcloud. The system gets noticebly slower. When I switch back to Ableton, Duet is recognized (sometimes not recognized at all) but I cannot play anything inside the project window.
Not sure what to do at this point

AE and Computer- Audio dropping out and stuttering issues

Hi all,
I recently bought an Airport Express 2 weeks ago. I hooked the unit up in my bedroom via ethernet(roaming) method. I use Airplay and turn on Computer and Airport Express to play both in my living room and my bedroom at the same time. Problem is I'm noticing my iTunes in my living room exhibits some stuttering during songs or the audio will start to drop out intermittently and sometimes shuts off completely but the Airport Express is still playing in my bedroom without issue. I've tried turing off the wireless but it doesn't do anything. When I turn off AE in Airplay and just play using the Computer it works fine. I'm not sure what can be causing the interference but it seems its between my computer and AE when they are both turned on. I would appreciate any suggestions forum members have to help me resolve this issue. I have the 2nd generation AE. Thanks a lot.
Macthemini

Hi Macthemini,
Thanks for using the Apple Support Communities. It sounds like you are experiencing issues with AirPlay between iTunes on a Mac mini and your AirPort Express. The following resource outlines troubleshooting issues for AirPlay performance:
iTunes: Troubleshooting AirPlay and AirPlay Mirroring - Apple Support
http://support.apple.com/en-us/HT203822
Troubleshooting performance issues
Wi-Fi Connection
If you are experiencing intermittent playback or significant network lag with AirPlay, it could be due to a weak Wi-Fi connection, interference, or the distance between the Wi-Fi router and your AirPlay-enabled device.
Ensure that other devices aren't trying to stream to the same Apple TV at the same time.
Ensure that your Wi-Fi router is set up with the recommended settings for the best performance.
Certain external devices, such as microwave ovens and baby monitors, may interfere with a Wi-Fi network. Try moving or disabling these devices.
If your wireless and wired networks are the same, try connecting your Apple TV to the router via Ethernet instead of Wi-Fi.
Use the Wi-Fi network troubleshooting guide to resolve interference and other issues.
- Matt M.

Usb audio drop-out and problems on 2010 Mac Mini

Hello! I recently purchased an Apogee Symphony USB audio interface for my Mac mini. I have been trying for over a month to get it fully functional without having any dropouts. The interface runs fine for about 15-20 minutes before I hear static (using my DAW, using iTunes, streaming movies on Netflix, etc). Sometimes the DAW (reaper to be specific) can't play back because the computer lost the connection to the USB Audio interface. I know this because I launch Audio Midi setup and it does not recognize the Apogee Symphony interface. I restart the interface and it works fine. There is intermittent loss at times, inconsistent latency, etc. I have worked with Apogee support and we've tried everything - newest drivers, firmware update, etc. I used to run Snow Leopard 10.6.8 and had the same issues; I upgraded to 10.7.5 but had major kernel panics due to the display (or something, couldn't quite figure it out) but I reverted to 10.7.4 and everything runs smoothly... except the audio interface.
This led me to doing some research online and I think the problem is with USB audio dropouts. I've tried disabling Bluetooth, Airport, not putting my HD to sleep, etc and still has the same issues. I've tried two different USB ports: the one closest to the display and the the one next-to-last.
My question is: what causes the USB audio dropouts and is there a fix for it??

This happened a bunch of times; I only copied the main gist of the error message:
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: kIOReturnNotResponding
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: System          : 0x38
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: Sub          : 0x0
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: Code          : 0x2ed
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: sys_iokit error
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: sub_iokit_common
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: kIOReturnNotResponding
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: System          : 0x38
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: Sub          : 0x0
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: Code          : 0x2ed
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: sys_iokit error
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: sub_iokit_common
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: kIOReturnNotResponding
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: System          : 0x38
Jun 1 19:01:31 Franks-Mac-mini com.SymphonyIOUSBDaemon.plist[63]: *** process 63 exceeded 500 log message per second limit - remaining messages this second discarded ***

Static and audio drops out

I am not sure if I am in the right Discussion area. If not, please advise where to post. After having work done (new mother board and power supply) on my iMac I heard a static or scratchy noise in the lower right side behind my screen while listening to iTunes the week after I got the machine back. Some songs(with more treble) were worse than others. My parents and I iChat every Sunday. The static now interferes with our iChats and the audio drops out and then will come back. They hear it more on their end than I do on mine. I tried turning the speakers way over to the left and that did help some when listening to iTunes, hulu but, not the iChat problem. My question is - do you suppose it is my speakers rather than another issue such as bandwidth or setting elsewhere? And if I were to buy external speakers would those then just amplify the existing issue? The computer on the other end is an iMac running snow leopard. Could it be that the microphone wasn't put back in correctly during my last repair?

Hi paperchase
That kind of sounds like the right internal speaker is bad or loose and the Internal Mic is picking up on the noise from it.
One thing to try before committing to a 2.0 or 2.1 External Speaker System, is to test the iMac's external output sound with iPod buds or a set of headphones. That at least will give you a better idea if the problem is with the right internal speaker or something worse like the sound card.
Likewise if the repair work was recent, then perhaps you should contact the service provider and report that it came back with an intermittent or rattling right speaker.
Dennis

Motion produces audio drop out in FCP

I'm working in Motion 2.0.1 with FCP 5.0.3. I'm using a G5 Dual 2.7, 4GB RAM with OS X 10.4.3
I created a FCP audio/video sequence with multiple clips and exported it as a self-contained QT movie.
In Motion I used the Glass Panes Open NTSC template...modified some lengths and added a number of additional layers. I dragged and dropped the previously mentioned QT movie into various layers. I used the slip tool to move the clips where I wanted them in the various layers. Everything looks and sounds fine at this point.
I export the Motion project as a QT movie (self-contained) and import it into FCP. The video still looks great but I get audio dropouts periodically through the movie.
I've trashed Motion preferences, I've played it only in the QT player with same results. I've gone back and exported the original FCP sequence another time...rebuilt the project again and had the same results.
Okay, I realize the work-around is to use the original audio while keeping the video portion of what was created in Motion. And of course that's what I've started doing now, but why should I have to go to that extra work?
Have any, of the many, much more experienced users of Motion come across this problem before. If so what did you do about it?
Thanks
Doug

Stupid, stupid, stupid. Can you guess how I feel? Okay, here's the answer to my own question, and I hope no one else has to waste hours of time like I did on this one.
When I exported the QT movie of course I used the "Export Preset" for DV NTSC Movie, because that's what naturally pops up in the dialogue box. But guess what ladies and gentlemen, if you're going to use this movie in FCP that's not what you need to do. Instead you need to make the additional step of clicking on the "Options..." button. Once you do this you will notice the sample rate for "Audio" is by default set to 44.1kHz. You need to select the disclosure triangle and then select 48 kHz. Once you do this your QT movies will in fact actually play in FCP.
Geez, I can't believe I went to all the trouble of re-inserting the original audio where all the drop outs were. Of course now I will begin putting in the new QT movies since the ones I have in there now have 44.1 kHz and that might produce audio drop outs when I print this baby to tape.
At least I can take solice in knowing that the hour plus I spent with the folks at pro video support didn't arrive with a solution either, and that I eventually figured it out on my own. Can I give myself points for this? Of course not. But I certainly hope I can give someone out there a little peace of mind if ever they come across the same issue.
Happy Thanksgiving
D

Problem : Audio drops out on multicast

We are using Quicktime to view multicasted feeds. We read in the SDP file, Quicktime goes off, does the connect...all is well..until you try and fast forward to get rid of the latency (customer wants < 100 ms, which Quicktime can do fine). If you get to the end of the buffering, video still works fine, but audio drops out and does not come back. There is also some audio pops while the fastforward occurs. This behaviour is the same on both the standard player and the wrapped version.
Have not seen anything in COM interface that can let me see how much buffering is left, otherwise I could simple keep poking fastforward until I have minimal buffer left.
Here is the SDP file we are using
v=0
o=- 1 1 IN IP4 127.0.0.1
s=RTP session
e=NONE
c=IN IP4 239.1.1.8/3
b=RR:0
t=0 0
m=video 49170 RTP/AVP 96
a=rtpmap:96 MP4V-ES/90000
a=fmtp:96 profile-level-id=245; config=000001b0f5000001b509000001000000012000c48dc0004138c00cc000c20097530c1f4c 2c1078510f000001b2656d347620342e332e322e3400c5ff
a=control:video
m=audio 49172 RTP/AVP 97
a=rtpmap:97 mpeg4-generic/90000/2
a=fmtp:97 streamType=5;profile-level-id=22;mode=AAC-hbr;sizelength=13;indexlength=3;index deltalength=3;config=1190
a=control:audio

There are only two possible causes I can think of:
1. The fiel your'e using out of FCP is bad.
2. The encode that DVDSP created is bad.
> After exporting to DVD using compressor, the audio on the DVD completely goes away 49 seconds in. It's there on the master in FCP, but not on the DVD. It goes away in simulator too. <
How did you export out of FCP? I always use a self-contained movie. If the movie includes the audio, there's a problem in DVDSP.
If you are exporting to MPEG2 out of FCP, you must figure out a way to check the audio portion of the file.
If it goes away in Simulator there's an issue happening right at that point. Does it play in the DVDSP timeline? Does it play in the media viewer of DVDSP? Can you open the exported movie in QT Player?
Is there anything significant about the 49 second location?
bogiesan

Eeek! Timeline audio keeps dropping out and I'm on a deadline!

I'm REALLY hoping someone has experience with this issue. I search the forums, and was unable to find anything quite like what I've got.
I've got a 25 minute project in a FCP X timeline. For the most part, it's a simple string-out of ProRes 422 video with AAC audio.
While playing, the audio drops out at random times for random lengths of time (usually around 1 to 8 seconds). The dropouts do not occur in the same place with any sort of consistency. It happens every few second, and it's making editing impossible.
FCP X is the only running app, and I've killed all the obvious background processes. Rebooting doesn't help either. I've watched Apple's activity monitor and seen no spikes in CPU or disk usage during the silences. Based on other audio issues I've read about, I tried coping all the content into a new timeline. That didn't help.
I'm running out of ideas, and more importantly, out of time. Can anyone suggest a fix?
Thank you in advance!

Holy crap! The media is AAC. How did I miss that?! I even typed it!!! I think I must have confused it with AIC (which isn't even an audio codec). Good lord.
Ok... I'm recompressing some of the footage right now -- just to make sure that's the culprit, which it likely is. I'll report back shortly.
Thank you, Tom!

Video playback slow and audio drop out after render

Hi
I have downloaded a trial version of After Effects from the cc,
Problem is everytime I render ou,t the video playback is slow and the audio drops out
This happens with AVI or Quicktime files.
Using a Intel i5 quad core, 8 gig of ram 250 gig ssd.laptop
Render/export in Premire pro is fine.
Can any one help.
Regards Phil Green
Blue Room Media.

It sounds like you might be hitting the space bar in hopes of getting real time playback. Sorry, but AE doesn't work like that, because it does totally different things from an editing application like Premiere.
And if you've downloaded the tryout version, you really ought to learn how AE works... and a short description is "it doesn't work intuitively". You can frustrate yourself in a hurry.
But this can really help;
Getting started with After Effects (CS4, CS5, CS5.5, CS6, & CC) | After Effects region of interest

Audio drop out in Encore AND Premiere

Strange problem. I am trying to burn a dvd with Encore. All the files play fine in QT, all the audio is there. once in Encore, it randomly picks clips to not play audio AT ALL. Sometimes it will play part of a clip then drop out audio. I have re installed and tried several tricks, like bringing files into Premiere Pro to render out a different file type. Now my premiere wont play the audio randomly either and the file produced has no audio! all other audio/video apps running fine. Not sure if its a Adobe Production Studio problem or a glitch in my system, thou as I said, rest of system works fine.
Any suggestions would be greatly appreciated!!
Steve

Well, thanks for reply but I got it to work after several work arounds, thou my Adobe products still seem to be working strange(Not opening as I closed them, etc.)
So, foe giggles, here was what I was working with.
I digitized some footage from a digibeta into my Avid where I exported Quick Time reference files to be used in After Effects.
In After Effects I exported Quick Time Movies with Blackmagic codec,8bit, with 4800k audio, uncompresed. All where NTSC 29.97. Files play in Quick Time/Windows media player no prob.
Installed Blackmagic codec on my home system for the final build with Encore2.0 DVD and thats when all the fun started. Encore would play files fine but then start to randomly drop out audio at burn.
To solve this I pulled QT's into Premiere Pro2.0 and exported WAV files to swap out for in Encore. This almost worked until Premiere started to mimic the Encore problems with random audio drop out.
After several retarts of the programs ( they would both have ASIO driver problems and quit audio. I replaced my driver, still same problem. whew!)I got the files all rendered.
Wow, still with me? Thanks! so long story I finally got the QT re rendered in Premiere to DV files that worked fine in Encore.Still think I have a system bug or somethig due to the fact these programs and Photoshop too are acting "wonky", crashing out or locking up, etc.
Thanks for the intrest!! any suggestions on system checks would be great!
Steve

CS3 exporting drop outs and red screen flashes when exporting via Media Encoder

Hi forum
I have been using Premiere Pro CS3 for a long time on my dual core PC with no issues. Suddenly, I am now getting a major issue i MUST get sorted asap for a client is waiting for the final video.
It is a HDV (1080i, 25fps) project/timeline. An 8 minute video has been put together in this and every time I try to export as either MPEG2 (Blu Ray) or WMV, I am getting pixelation in certain places usually around certain cuts, or horrible red blocky pixels filling up the screen for a second or two. They seem to come always at the same point. They don't happen when i render the timeline or show up when playing the edit itself in the timeline - just when i playback the exported video in premiere or in Windows Media Player.
To try a workaround I exported the whole video as high quality MPEG2 (blu ray - 30mbps), which I brought into a new sequence, then I exported small sections where this problem was happening as Uncompressed Microsoft AVI and called them "patch 1", "patch 2" etc. and brought them back in and overlayed over where the problems were occuring. The short Uncompressed AVI patches seem to have exported with no glitches, so theoretically I thought I had a clean good timeline in my new sequence made up of the MPEG 2 video overlayed in the dodgy places with uncompressed AVI "patches". However, trying to export a new MPEG 2 master from this has created the same problems, in the same places!!! Still drop outs and still those horrid red flashes filling the screen. Not always as bad, and some places where there were problems are ok, but I am still left with most of the problems still there.
I am now trying to export the whole video as an AVI uncompessed but dont know if this will work and will take a very long time.
I do have Saphire plugins, but they are not being used in this new sequence so therefore could that be a possible problem? I thought perhaps it was the brightness/contrast filter etc so removed that from some of the problem areas, and it helped on some of them, but not on others, so not sure its anything to do with my plug in or filters.
Any help would be greatly appreciated.
thanks, James

This topic is about a year old, but I thought I would reply because I just experienced this problem very recently and stumbled upon an easy solution.
Problem: When using Adobe Media Encoder to create an HD or .m2v video file, a bright red screen will flash followed by a mashup of red blocks/pixels somewhere within the file you've just encoded. This phenomenon lasts for exactly 10 frames before clearing up. Most likely, you won't see this problem until you import the encoded file into Adobe Encore. It shows up on the timeline, the preview monitor and the DVD itself. It occurs on edits that the system reads as being corrupt or when a flash bulb goes off from a still camera. Both instances make the encoding process go haywire.
Solution: Encode your HD or .m2v file with CBR (1-pass) bitrate encoding rather than VBR (2-pass). Don't worry about losing any quality in your video or creating unnecessarily large file sizes with your new renders. I guarantee you won't see much of a difference, if any. I can't explain why this solution works. It just does.
Hope this helps you as much as it did me.

Help me!:audio keeps dropping out and coming back in while importing clips

While importing from my camera (brand new Canon Xl-2) to imovie, the audio from the tape keeps dropping out and coming back in for some reason.This happens with all my tapes. I've tried using a head cleaner and that didn't help. I'm using a Maxtor external hard drive to save the project on. The project itself is kind of big (about 80 GB) Can imovie support projects that large? Could this be a problem with my processor?
I'm just frustrated beyond belief right now. Any help you can give would be greatly appreciated. Thanks!
these our my specs: Processor: 800 mhz. Memory: 1GB SDRam. The disk space icon at the bottom of imovie says i have 151 GB of disk space left.
powermac g4 Mac OS X (10.4.5)

Hi e
With a slow computer one has to minimize the hassle.
I would
- repair permissions
- cheque that nothing else is taking resourses from the job (energy saver,
screensaver, File Vault etc.)
- I would move material to my ext hd so that I got > 80Gb free (for a 80Gb
project)
- nothing else connected than my Mac + Camera and import.
Yours Bengt W

ITouch and Pandora app....audio drop outs

Anybody having audio drop outs when using Pandora? It used to work flawlessly on my home network...nothing changed except maybe the update from Pandora in Aug? Anyway- tried the Pandora app on my Apple network at work...no problem. Is it my home network?...My network is secure...I have a cable modem and Time capsule wireless router. What is REALLY perplexing is that AOL radio app. streams fine to my iTouch.
Please anybody have a solution or similar problem with a fix for this? This was/is the best app for the iTouch and a speaker dock! So frustrating.
Tried reinstalling the app.....no luck
...all updates are current.
any thoughts?
Thanks-
Steve

I saw that post...but I'm not sure it applies to my situation. It doesn't seem to be connected to when my screen is locked or not. As I stated, It works without a hitch at my work but at home it has the dropouts. I would normally think...well it HAS to be my connection or speed or traffic at home BUT Pandora used to work flawlessly...it probably started having the drops after the update. Maybe the locked screen bug has something to do with my problem but I'm not sure. Why would it work at my work w/ an apple router and NOT at home with an apple router?...just plain weird...
I get buffering with LastFM if that is any clue for you? I don't get any buffering with the AOl radio app.
As a note I get no issues when I listen to my Pandora on my desktop both wirelessly and wired....so it HAS to be an iTouch/Pandora issue. I hope you are right that the update will fix my problem.
Thanks

Audio drop-out in FCPX with 1920x1080 & 2048x1240p @ 24p (codec Apple ProRes 4444 (Linear PCM))24p

Hi all...
I'm new to this forum.
Is there an audio issue (drop-outs) with FCPX (ver 10.1.2) for 1920x1080 24p, 1080p HD & 2048x1240 24p (2k) - note: films in FCPX are in codec Apple ProRes 4444, Linear PCM?
Very recently I've been working on a show reel and I have imported a file (short film) to snip out a section to add to the show reel.
I set the project to the film's settings i.e.. "set based on first video clip"...(1920x1080 24p, 1080p HD). When I play the film in FCPX the audio "hic-cups"..."dips to silence"..."drops-out" briefly (up to 0.5 secs in duration) and very frequently all the way through (approx 15 mins long film)...note: audio set is at stereo 48kHz. The audio monitors on the right hand side also show the dip taking place (if it's a long enough drop-out).
I also have a version of the film in 2048x1240 24p at 2k, again Stereo 48kHz...and this does the same audio "drop-out" all the way through. I'm unsure what other formats will create this problem i.e. higher or lower aspect ratios than those above.
Is this a software and/or OS issue? Or a hardware issue? Or both!?
About This iMac details:
iMac 27 inch: OS X ver 10.9.4
Processor: 3.5 GHz Intel Core i7
Memory: 32 GB 1600 MHz DDR3
Graphics: NVIDIA GeForce GTX 780M 4096 MB
Fusion Drive 3.12 TB
Final Cut Pro X was bought & installed with this iMac back in Feb 2014
FCPX version: 10.1.2
Note also: I used Compressor (ver 4.1.2) to convert the files (movies) above to Apple ProRes 422 HQ, Linear PCM and the issue disappeared - the audio and visuals played with no problems. All films play with no issue when opened in QT player. They are also fine when exporting from FCPX. The issue only occurs (as far as I can tell) within FCPX when editing or playing the audio there.
Has anyone encountered this problem?
Kind Regards,
Hakan

Hi Luis,
Thank you for that.
Seems like you have a point about the "hardware" issue. I'm unsure (new to it all) at what data rate my (er...wonderful) fusion drive provides FCPX for smooth playback - or where I can find that info on the iMac. Playing back movies in the 422 HQ codec seems to have no issues (when I converted the movie from 4444 HQ).
But playing the full 4444 HQ, the picture is smooth, but the audio has these drop-outs - even with "best performance" option ticked. Interesting that the audio suffers, not the picture in FCPX - so not sure what's going on there. I also read - perhaps - that to play a smooth ProRes 4444 HQ movie in FCPX the data rate should be min of 500 Mbs (based upon About Apple ProRes) for HD movies and up (i.e. 2k). ProRes 422 HQ needs a data rate of 220 Mbs - so that is my upper-limit to smooth video&audio playback with the current system I have, I guess.
Does anyone recommend a fast USB3 or Thunderbolt drive (500Mbs+) where I am able to run 4444HQ movies with no issues to picture or sound (away from the fusion drive)?
KR
H.

Audio Drops Out at End of Imported Clips

Hi, Guys,
I have read everything and tried everything, but I can't find a solution to something which seems like it should be obvious:
I am in the process of uploading some TV programs to YouTube. I am using iMovie '11 to cut them into chunks of less than 15 minutes each. When I import the material into iMovie from a file, iMovie automatically breaks the source material into ~5 minute clips. For some reason, the sound for the last half-second or so at the end of each clip is automatically muted by the import process. Needless to say when I cut the clips back together in an attempt to recreate the video stream as it originally was, there is a half-second of audio drop-out marking the spot where the clips are welded together.
How can I get this to stop???
I notice that the advertising makes a big point of 'iMovie HD' allowing the user to adjust the length of the clips that it cuts source material into during import. Please tell me this is not a work-around for this problem 10 years after-the-fact!
Thank you.

I used to have a saying which I applied to John Cage's compositions:
"He's got nothing to say, and he's saying it. And that's BS."
Faceless capricious corporate censorship is good HOW?
As regards iMovie '11 muting a short bit of audio from the ends of clips, it turns out to be the beginnings of the clips:
My prior post uncovered a very different problem in my process. (At the time, a virtually non-existent process!)
Now I have learned my up the learning curve to the point where I am beginning to actually use some of the functionality in iMovie '11. Unfortunately my original observation of "a bit of sound" (50 to 100 milliseconds) disappearing between clips is still a problem. Here are 3 minimalist examples in the form of short test vids: {Just click "Play all". Titles projected over the vid list what you are hearing. The "about box" (YouTube "Description:" field) contains even more detail.}
http://www.youtube.com/viewplaylist?p=7E219251FC3C5FEC
I can now characterize this problem in more detail than I could previously:
The first 50 - 100 milliseconds of sound are squelched in the beginning of a clip when it is uploaded to YouTube from iMovie. This is NOT a YouTube transcoder issue. Reloading multiple copies of the same clip into iMovie yield the same result there: Dead sound between clips.
This demonstrates that iMovie chops the first ~50 milliseconds of audio off of the beginning of a vid when it "shares" (exports) it. Apparently the missing audio in some way becomes an "attribute"of the clip (like a crossfade transition that you can't remove from the beginning!), because attempts to trim the squelched audio off of the beginning of the clip meet with failure; the "bad leading edge" stays with the clip, even after the apparently offending segment has intentionally been discarded.
I checked the audio gaps with Audition, and, while I was guessing 50 - 100 ms, it turns out to be exactly 52 milliseconds of audio is squelched at the beginning of a clip. (I tried to display the image of the spectral & time-domain response here, but I can't figure out how to upload TIFFs into this forum.)
I am sure this must be the result of some simple default setting in iMovie which automatically adds a "style" or something to my vid clips upon export, but I have tried everything I can find, and, if it is, I haven't managed to reliably turn if off yet.
N.B. if I remain inside an iMovie editing session, and paste pieces together into clips without exporting the clip, or interrupting the session (as I did to produce the test vids), everything is fine. But as soon as I save a clip, the first 52 ms of audio seems to irrecoverably disappear. That continues to hold true no matter which frame in the clip subsequently becomes the new beginning.
Please forgive my iMovie newbie ignorance, but: How do I get it to STOP???
Thank you.

Audio drop out and picture wobble during export to tape

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