Jerky playback of 1080p files

When trying to play back HD video captured with my Canon S1X, playback through QT is subtly jerky at actual size. When I decrease the window size, or strangely enter full screen, playback becomes smooth. Processors are barely working. Frame rate says 30 in inspector, but looks more like 10 or 15 on the screen.
System: '07 2 dual-core 2.66 Mac Pro w/ 5G memory. OS 10.6.2. QT 10. The files generated by the camera are 1080P .mov (h.264).
I've tried converting them to M4P in handbrake, but no improvement. A friend of mine has the same Mac Pro, but with 8G ram, and he has the same problem. Playback on my Macbook Pro is even worse (very jerky). This is kind of annoying, my tower should be able to handle this. Or do I need to step up to a new system to be able to play 1080P at actual size?

An update: I've had better luck playing 1080P with VLC (ffmpeg skip loop set to Non-ref), and MPlayer OSX extended. While both apps will play the file smoothly, neither offer the control of Quicktime. QT scrubs more smoothly & offers smooth forward & back increment.

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Jerky playback of wmv files

Please can anyone suggest how to fix this. Medium size wmv file (128Mb). Flip4mac version 2.2.3.7 and QuickTime 7.6 (472). Very jerky playback of both audio and video with much spinning beachball.
Message was edited by: Roger Sinden

Medium size means nothing. How long is it? If it is one minute that is a really high bitrate video and the G4 may not be able to decode it fast enough.
Try this - open it, then "save As" which will save it into a MOV container (it will still be WMV video).
See if it plays back nicely. Also try a computer from more recent times.
You can see a 128 MB WMV will save as a 256MB or even bigger MOV file as the video is not compressed any more in the MOV container.

Jerky playback even on RAID 0

Hopefully someone has a solution to this irritation!
I am running Premiere Pro CS5 on a Dual Xeon 2.4Ghz, Windows 7 64bit with 24 GB of RAM and an Nvidia Quadro 40000. It is a new system with barely anything but CS5 installed.
I render out PSD image sequences from After Effects and when I play them back on Premiere's timeline, 720p sequences can just about play smoothly however 1080p sequences stutter consistently.
To resolve this issue I have bought an extra 2 WD Velociraptor 10000rpm drives and now have 3 of these drives striped as a single volume in a Raid 0 configuration. I've tested the Max Read of this new volume and I can get 326 MB/s out of it so no problems there.
CS5 is installed on my system C drive. The footage and Adobe cache files are stored on the RAID 0 volume and the Premiere project is saved on an external eSata drive. I have Mercury Playback GPU Acceleration selected in Premiere, I have the latest Quadro 4000 driver installed, I dragged the imported footage onto the New Item icon in Premiere so it matches the sequence settings. Reducing the playback resolution with Premiere makes no difference whatsoever.
It is so frustrating that the jerky playback is still happening. It is happening with footage shot on a Red also. The only possibilities I can possibly think of now are that there is some magic unit size I should use when creating the RAID volume, or whether AVG is somehow interfering, or if there is some feature on Windows 7 that I am not aware of that is doing things with the drives.
Does anyone have any thoughts on how to resolve this?

katzkane wrote:
I render out PSD image sequences from After Effects and when I play them back on Premiere's timeline, 720p sequences can just about play smoothly however 1080p sequences stutter consistently.
Does anyone have any thoughts on how to resolve this?
Don't expect image sequences to play back realtime; they won't. Actually, that's not entirely true; if your I/O subsystem can produce very high transfer rates (which it sounds like yours can, at 300MB/s) then you might be able to if your image sequences are UNcompressed TIFF. Any other compressed format (compressed/LZW TIFF, PNG, PSD) is not optimized for video playback and you're going to get stuttering. You proved this yourself by rendering to an uncompressed .AVI file which you said played back perfectly.
Your options are:
Render your sequences to uncompressed .avi
Render your sequences to a lightly-compressed format like Cineform (only slightly lossy)
Save your image stills in uncompressed TIFF
Or, you could just live with the stuttering -- remember, it's a preview issue only, your final mastered output file will be flawless. If you simply MUST have realtime playback of what you already have because you're trying to time/edit a sensitive part, adjust the work bar to cover just that section and then render the section. It will render to an intermediate format for preview which will play back realtime.
PS: Ignore this hard drive reformatting talk -- If you're seeing rates of 300MB/s out of your RAID-0 then you're hitting the maximum transfer rate of SATA 3 (which is great). The problem isn't your RAID-0.

Jitter, stutter, or jerky playback on output

Hi friends,
I've edited a video in Premiere Pro CS4 and it plays smoothly in the timeline. However, when I export it for DVD output, and then preview it in Encore, every minute or so, it will play one frame out of order. I don't know whether to describe this as a jitter, a stutter, or jerky playback. The preview is accurate: if I burn a DVD from Encore, the DVD will have the same glitches in playback. Again, Premiere plays everything fine.
The frame can be pulled from before or after the current point in the timeline. The first glitch occurs at 08s 15f and plays frames in the clip in this order: 1,2,3,4,17,6,7,8,9... Then it goes to 01:24:15 and partway into another clip does this:
24s:14f
24:15
24:00
24:01
24:16
25:02
24:17 (back to normal)
Both of these clips with these symptoms have a lot of movement (people moving independently in the frame, plus camera movement), but there are other clips with nearly as much movement, and they do not have a problem.
The source footage is AVCHD 720 30p in a matching timeline. I do have some SD footage later in this timeline. This SD footage was captured to the computer via Firewire from a Canon Optura. It is "Scaled to Frame Size" and rendered in the timeline, and is causing zero problems. I exported using the Media Encoder. I am outputting to DVD using the MPEG2-DVD and NTSC Widescreen preset, with the aspect ratio changed from 16:9 to 4:3 and the quality set to 4.5.
I'm running Premiere Pro version 4.2.1 and Encore 4.0 on an Intel Core 2 Duo T9550 2.66 GHz with Windows 7 (64 bit), 4 GB RAM, a 5400 RPM 320 GB hard drive running the OS and the video files located on a USB 2.0 7200 RPM hard drive.
If any of you have ideas, I would be grateful.
Thanks,
Russ

I've been having this problem since installing Snow Leopard with QuickTime 10 way back when and it's caused me real problems with video rendering. I think it's a codec issue as my raw video files play back ok (H.264 codec), but when I export them and save as Photo jpeg or motion jpeg etc the playback has about 4 or 5 seconds of jerky playback near the beginning of the file.
I've just tried opening all my test files with QuickTime v7 and was staggered to see them all run perfectly. It is indeed very annoying.

Jerky playback in Bridge CS4

I get jerky playback of Hi Def mov files shot on my Canon 7D when playing them back through Bridge. The same movies play smoothly with no stuttering whatever on the same machine through Nero or any other player I have installed. According to my camera manual, the frame rate of these movies is 25 fps (I am in the UK using the PAL TV system) and so I set Bridge to play back at this rate (it was originally set to something like 29.77) but that made no difference. Is Bridge using a different codec or what?

Bridge uses Quicktime, so any performance issues wil lhave to be attributed to that, most likely.
Mylenium

Jerky playback

All of a sudden I'm getting jerky playback of video. I've tried the usual fixes: trash preferences, delete render files, repair permissions, repair disk, but nothing has helped. This happens in timeline and also with individual clips in the viewer, on all projects, playing from a variety of hard drives. It may be a coincidence, but it started happening today right after I played a few of the videos on the new google video site. Also, when I open the Mac Finder, the columns are slightly jerky, snaping back and forth laterally, which leads me to guess the problem might be in my system rather than in FCP, so a re-install of FCP might not help. My other programs are working normally. Any suggestions? I'm running the latest FCP 5.0.4.

Perhaps it is now time for the Harpoon solution (aka the Guinness solution in the mid and far west)
for those not in the know:
1. turn everything off.
2. unplug firewire cables
3. unplug power cords
4. get up from well worn chair
5. walk to refrigerator
6. open refrigerator
7. remove bottle of Harpoon (Guinness, local micro brew, etc)
8. pop cap
9. pour into glass ( you AREN'T going to drink it from a bottle, are you?)
10. sip responsibly. enjoy the moment. think pure thoughts
11. return to kitchen. If less than 15 minutes has elapsed, have another. Otherwise, retrurn to edit room.
12. Plug everything back together
12. fire up external monitors, VTR, external hard drives & computer in that order.
does it work now? If yes, congratulate your self. If not, oh well, but at least you are in a much better frame of mind to begin some serious troubleshooting.
cheerios,
∏

Does adding RAM help solve iMovie4 jerky playback

I have been reading threads about jerky playback in iMovie4 in large projects, after adding music from iTunes etc. My wife has a monster project and playback during editing has became very eratic. I have emptied cache, repaired the hard drive, repaired permissions etc. I have not tossed iMovie preferences. I have 23 gigs of space on the HD and a 250gig external FW HD that I bought after she started the project on the internal HD. I would like to know from you experts: 1. Would it help to move the project to the larger external HD? 2. Would adding RAM help (currently iMac G5 1.8mhz with 768 megs RAM)? 3. Is there any way to tell if the project will export to iDVD smoothly if it continues to look terrible in iMovie playback? I hate to go through a few hours of rendering for nothing. Thanks so much for your help. I always find good and useful info in discussions.
Mike Ryan

Michael, there are some very useful applications that I highly recommend to keep your Mac running smoothly. As a defragmenter I use Allsoft's Disk Warrior that also has a very good directory repair feature. Check out also Drive Genius that has a host of useful features. Also get iMovie file fixers, invaluable tool that is free that will allow iMovie to import certain files in audio and photo formats that are greyed out and also has other features. I believe I got mine from Mr. Lennart Thelander in previous posts here. Cache Out is an excellent application to clear out cache files. I also advise you do a regular permission repair from Disk Utility in your Utilities folder that is on your Mac. These are basically my must have applications. As for copying your iMovie project to your external, just drag your entire project folder ( the blue one with the media and star folder(s) in it directly in the external hard drive. I find that iMovie is one application that requires a clean (defragmented) drive with ample space to spare. I defrag my drives if I trash files often from them, or if I notice erratic and jerky performance or slowness in response. I hope that some of my suggestions will help your in your editing.

Jerky playback in elements organizer

Hoping some one can help out here. I've downloaded the trial version of Premiere elements to edit videos captured with a Kodak playsport. When I view the captured video in the organizer, it a very jerky playback. When I play back using Windows media player or quicktime, it's nice and smooth.
I've tried capturing the MOV files in 720p and 720p (60fps) and have the same issue.
Anyone have any suggestions?

Jerky playback in PE is almost always because you have not rendered the area where the jerk is. - or else you dont have a fast enough computer or enough RAM or have everything on one computer hard disk.
If you have a horizontal red line above any of your video in the time ine it means you dont have it rendered. It is caused every time you insert a transition or effect or if your original meaterial doesnt match the original project settings when you imported the video.
You dont have to render the whole project if there are only parts with a red line - just adjust the work space pointers to cover the red line and render that.
There are numerous posts in this forum about it and the way to cure it

Jerky playback of movies only in iTunes

Have movies that play perfectly directly from Quicktime (7.1.3) and when loaded on the iPod with iTunes. But when the same file is played within iTunes (7.02) as a movie, the playback is jerky and like stop motion. The apparent frame rate is several per second. Audio playback is fine whike this happens.
Activity Monitor shows about the same level of CPU utilization in both applications Quicktime and iTunes, at around 20% on my 1.6GHz G5 Powermac.
I have Quicktime Pro if it makes a difference.
Using EyeTV (2.3.2) and playing back as a Qucktime movie also produces a clean playback.
So, the jerky playback is only in iTunes.
OS X version is 10.4.7, I'd rather not update to 10.4.8.
I've looked for preference settings and other interactions. Any suggestions?

If you search (itunes forums) you'd have found this tidbit:
I found the problem! The jerky playback in iTunes7 is caused by a conflict with the 3ivx D4 4.5.1 component found in the Library/Quicktime/ folder.
It may also be say an old DivX codec, etc. Same folder. Remove to your desktop and try again.
Also some have reported turning off the internal mic if you have one, and making sure MIDI settings are at 44.100Khz.
Give these a try.

CPU spikes & jerky playback of audio or video content

I've been having a problem with the flash plugin this year. I'm not sure when it started exactly, but I'm certain that this wasn't happening during 2011.
When at a site that uses Flash for video+audio (Youtube and similar) or even audio-only playback (Turntable, Pandora, etc), I find that the flash plugin causes spikes of 100% CPU usage (on one core) and that the video or audio will pause for a moment during those spikes. The disruption is typically in the 100-500ms range.
Frequency of the spikes seems to vary over time. It's fairly typical to experience a situation where it starts off bad and the frequency of disruption lessens over the course of 30 minutes until there are no disruptions at all. If you keep using playback, it'll work its way into being bad again. You're likely to start using the flash plugin at any point on that sine wave of disruption intensity. It might start working well but slowly get worse, it might start bad and slowly get better, it might start at a tolerable level and work its way worse or better depending on if you're on the rising or falling side of the cycle.
Whatever it is, it isn't my Windows install. I switched from an AMD FX-8120 to an Intel 3930K about a month ago and this problem persisted through new hardware and a fresh install of Windows using the latest device drivers for everything. I've even tested different browsers in case it was an issue with only the non-IE plugin or with my specific browser (Opera). The issue happens in Chrome, IE9, Opera, and FF on my system. I've also tested both with and without hardware acceleration, but there is no difference.
I have to wonder if there are any known issues with particular sound cards (Xonar STX), unusual video configurations (dual Radeon 6970s in crossfire), or peripherals. Perhaps with output sampling rates (96 KHz) or security software like MSE?
Anyhow, I mention this here in the hope of either raising awareness of a problem or finding answers if this is a known issue. It's silly that playing back audio would be a challenge in 2012 with good equipment. There is sure to be a logical explanation that can help lead me to a resolution. Thank you.

Hey Tbird, I was asking the guys about this jerky playback bug here:
https://bugbase.adobe.com/index.cfm?event=bug&id=3155813
It turns out this problem is very likely found in mainly computers with single-core CPUs or low-power mutiple-core CPUs. What type of CPU model is on your computer?
My advice to everyone who has this jerky or choppy or stuttering playback on Flash Player 11.2 is to downgrade back to Flash Player 11.1 for now until the Adobe guys can fix this problem which seems to be with the multi-threaded decoding engine introduced in Flash Player 11.1. Make sure you uninstall Flash Player 11.2 completely before installing Flash Player 11.1.
You can get Flash Player 11.1 in this zip file archive from the link below. Just make sure you look for the right setup folder with the right setup program file in zip file archive (For example, if you got Windows 64-bit OS, then look for win64 (or x64 for windows ). If you got windows 32-bit OS, then look for win32 (or x86 for windows)
http://fpdownload.macromedia.com/get/flashplayer/installers/archive/fp_11.1.102.63_archive .zip

Jerky playback of movies, Im getting desperate now, help !!

I have recently purchased a Sanyo Xacti digital camera which records onto an SD card in MPEG 4 format, the camera came supplied with Quick time to view the movies on.
I installed it and everything worked fine. I looked at the option of going PRO with the software because of the editing and file conversion facilities it offered, the £19.99 fee seemed reasonable also, so I did, during this quick time upgraded the player to the current version 7.1 also, since doing this my movies do not play back properly, the quality is grainy on some parts and the footage is choppy and laggy. I am really annoyed now as I expected to gain some useful features, not loose the one thing this player was intended for!!
I have searched through the forums for any clues and tried do some suggestions, i.e. running in safe mode, uninstalling QuickTime and reinstalling off the CD that came with my camera and I have upgraded my graphics drivers as well.
The thing is I downloaded the free VLC media player and that plays fine, the same movies also play ok on my editing software that came with the camera.
I spent half an hour on hold to apples Technical help line then got cut off! nice service eh and its cost £20 for this pleasue with no way of getting a refund or any help on the matter!! so it seems?
Thanks for any help you can give
Regards
John
custom Intel 3Ghz, 1024m ddr Windows XP

"Copy one of your clips to your internal (system) HD. Open & play it in the QuickTime player. Does it play ok?
Do you have more than 1 project, and if so is this happening in all projects or just this one?"
Hello again ~
I have done all the memory upgrades, external (new 1TB:Mac OS Extended (Journaled) / internal: Capacity: 233 GB Available 90GB) moving new project onto 1TB drive and making more room on the internal drive too. Skipping/jerky playback still occurs.
I copied a small section, placing in & out points on a few seconds of the project. I stopped at that point because I couldn't figure how to move to the internal HD. (My brain has been on overdrive and dropping memory rapidly ~ another support topic.) Please tell me how to move the clip to the internal drive.
I did play another completed project, that had no previous problem. It did skip when the player was over the titles/transitions.
I thought of copying the project and starting w/new titles & transitions to see if there was some corruption problem, until I played the 2nd project and had the same result.

Playback of 1080p footage looks like studdering

I export my footage to Apple ProRes 422 HQ 1080p. Then I run a check in Quicktime 7. Need it to set a posterframe.
But when I run the clip, people walking in the shot look like shot in a slower framerate.
Got a big shock, because it would mean to re transcode those clips.
I then opened for testing 1 clip in FCP and everything looks smooth.
Must be something in the settings of QT7. I like that program, because I can open more clips at the same time.
Anything I should change in the settings?
Thank you.

Anything I should change in the settings?
Probably your work flow.
If you are setting a posterframe for your Apple ProRes 422 HQ file, then the assumption is that this is final distribution format. While this codec may be excellent for archiving raw data and video editing—it is not suitable for the distribution of a final product targeted for general playback. Further, while FCP is optimized for the editing and real-time rendering of "Pro" codec edits on systems that which support this, the QT player is only optimized for the general playback of distribution level content. Thus, the most likely reason for you playback problem is your likely attempt to push more data through the QT player than it can smoothly render without dropping frames which is is designed to do when it cannot keep up with playback requirements.
What you are seeing here is probably quite normal. Basically, you need to look at your video data rate here. How much data are you trying to push through the QT player per second? Since you did not mention whether or not you limited the data rate of your Apple ProRes 422 HG coding of your content, I will assume, for the sake of argument, that such encodes were made in the auto data rate (i.e., unlimited) mode. If true, then it is likely that your playback expectations are simply unreasonable and you should modify your work flow so that the final distribution content matches media player capabilities.
As no one had asked such a question previously, I ran some tests to get some idea as to what might be going on here. To simulate an HD source content, I extracted a 4 minute video only segment of a BD file I already had on my system, exported it to an Apple ProRes 422 HQ compressed file and compared the results. Here are the stats I found for the H.264 "source" file:
As you can see, the video data rate is greater than 26 Mbps. This is 4 to 10 times what I normally use for general playback distribution H.264 1080p files and roughly 6 to 16 times what I use for 720p H.264 content for mobile IOS and ï£¿TV devices. When I recompressed the BD video data to Apple ProRes 422 HQ and allowed it to use all the data rate it wanted, here is what I ended up with for this particular source file:
As you can see here, this particular file increased 7.5 fold in terms of data rate and file size for the same 4 minute file. In short, this compression codec was never designed for use as a distribution/general playback format and its use here in the QT player likely creates a data bottleneck when trying to play the equivalent of 7 and a half blu-ray discs simultaneously if your files are encoded similar to my test file. So yes, once you are satisfied with the FCP edits, I would probably recommend you recompress your files to match your distribution/playback requirements/needs but keep the "master" file as an archive file for re-edits and/or re-compression as different situations may warrent in the future.

Adobe Premiere 8.0 - jerky playback

Guys, here are my computer specs. Should I have a problem with resource requirements?
Base processor
Core 2 Quad Q6700 (K) 2.66 GHz
1066 MHz front side bus
Socket 775
Chipset
Intel G33 Express
Motherboard
Manufacturer: Asus
Motherboard Name: IPIBL-LB
HP/Compaq motherboard name: Benicia-GL8E
Memory
Component
Attributes
Memory Installed
6 GB
Speed supported
PC2-6400 MB/sec
Type
240 pin, DDR2 SDRAM
Hard drive
750 GB SATA 3G (3.0 Gb/sec)
7200 rpm
Video Graphics
GeForce 9500 GS
512 MB GDDR2 memory
I/O Ports: HDMI, VGA, dual-link DVI

I would like to share some recent progress and new problems with PE8.
Firstly, I made a new short-cut for PE and run PE.EXE i/o PE 8.0. EXE. This saves the time on avoiding the Welcome menu. Thanks for the tip.
Secondly I turned off rendering....
Now....
Two nights ago I decided to import all my videos (total length is about 60mins) into the library. I noticed that after I tried to highlight all the clips and drag them into PE timeline, my PE seemed to have frozen. I/O restarting the computer I let it be. I came back the folowing night, all my files were in the timeline ready for effects and transitions. I suppose it just takes PE some time to "process" the imported videos?
Anyways, I tried to playback some clips in the monitor and the video was jerky. I ignored that fact and tried to add a dozen of random transitions here and there. It was very hard to fine tune the transitions because of the jerky playback. OK, I then went to SHARE and export to PC. I exported to a file in HD preset: 1080i, 30fps, etc. I left my computer along again and returned the following morning. The export was successful; took approx 2.5hrs.
A new file was created on my desktop with extension .m2t. No associated software was assigned to playback this new file so I went to "Open With" and chose Windows Media Player. I think I have a 9 or a 10 ver. It played well, the sound was good, video was sharp (no jerkiness), transitions sucked as they were not fine tuned due to the reasons explained above. The .m2t file was measured at 4.7Gb. I brought a 8Gb CFlash card from my SLR and connected it to the PC via USB. When I tried to copy that .m2t file and paste it to my card, which had almost double the required space, I received a prompt saying the file was too large to copy.
I then tried to copy that file to my HDD sony camera, with 120Gb of available space - the same result. The error is - the file is too large to copy. What the heck? How can I test this file for a playback on my TV if I cannot copy it to any external storage device.
p.s. I am trying to find my most favorite transitions: "No Effect", "Cross Fade". I do not seem to find the two from the list.

Jerky playback, sluggish operations while editing

I've never had any troubles with video until now. I'm getting jerky playback on my machine, where under the previous iMovie I didn't. The playback display will freeze and skip, while the vertical red place marker pauses and jumps forward. The video doesn't have sound at this point, so I don't know if sound is skipping. I'm running on a 30" Cinema display with iMovie filling the screen.
When I take actions, such as clicking on a clip, there's a slight pause before the action happens. Scrolling through video to find the right frame to split on is very sluggish.
The type of video that I'm editing are screen movies created using Snapz Pro X (http://www.ambrosiasw.com/utilities/snapzprox/) at 30fps, saved as MP4's highest quality. Yes, it's a lot more space, but I like to preserve as much quality as possible through the editing process.
Activity Monitor shows that I have 266MB of RAM free, so I don't believe I'm running into swapping problems. At the suggestion of an Apple Store employee, I had an authorized Apple repair place upgrade the hard drive (to 7200RPM; weeee!) a year ago since they don't do after-market upgrades.
I've used iDefrag to defrag the filesystem. I'm maxed out on RAM (2GB; first generation MBP).
What types of things should I be looking for to get smooth playback while editing?

I doubt if any card works well with CS5.
It's best to have an Adobe PC without any video signal card.
1. Use a capture/playout PC to capture and view the images, preferably also without using any Adobe software.
2. Then do your stuff on the Adobe PC.
3. Transfer the mixdown of the video to your capture/playout PC, check the field order and print to tape (without Adobe) or deliver the file.
For now, Matrox MXO2 is also unusable with CS5. Boris FX makes things even worse.
My PC is extremely powerfull, so that can't be it, but it's very unstable.
Manufacturers of cards and Adobe don't work hard enough to combine their products and they just blame eachother.
It used to be quite nice semi-pro stuff for editing but forget that with any video hardware for the time being; it dropped to amateur level.
I'm done trying to fix it or waiting for solutions; I just issue warnings for other users and buyers now.

Apple tv gen 1 and 2 jerky playback.

I have had this issue since i first purchased atv1 when they first came out....jerky playback/lag/ slight delay..whatever you call it..i upgraded my modem to an N series..i got apple extreme and ditched the belkin..i bought apple express......extended the range......
i bought atv2 thinking maybe it will fix the problem....nope.I have all Apple hardware except the modem and download via wifi..(i have tried ethernet direct and sill the same)...i hassled my ISP and now have around 6mbps.....still have the lag.....i recently downloaded from foxtel..(ethernet) to compare and playback is perfect...what;s the go with Atv....? i am far too gone now to just leave this and accept it as normal...i still have atv 1 on a separate tv and still the same old lag.....any help or suggestions would be most welcome before i ask apple for full refunds of all the movies/tv shows i have bought..i would rather use Apple to buy tv shows and movies than Foxtel in priciple...but i am running out of ideas......when i first went to support originally Apple hadn;t heard of this....?

Same with 3rd Gen too. I made a movie in Final Cut Pro, exported as SD, 720p and 1080p. Plays back smooth on Mac, iPad, iPhone etc... but on AppleTV 3rd gen, it's dropping about half the frames.

Jerky playback of 1080p files

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