Something causing a tiny jitter/slowdown in video playback...
I have tried MPlayer, totem movie player, vlc, xine, you name it-- every somewhere between 20-40 seconds in a .avi/.mpg, there's a tiny little few frames dropped, it's the briefest thing but it happens many times through a half-hour or hour episode or two hour movie
I have looked at my running processes, I even played video right at log in with zero startup apps, am using fluxbox. I can't figure this out. I have a P4 3.4ee, 1.2gb ram, 7600 gs 512mb card, 2 x 320gb sata drives, can't be the hardware I am confident as it plays back perfectly otherwise.
It seems it's just something causing it to lose a few frames or something at these random intervals?? I'm completely out of ideas, I've been testing with so many different video files for the last couple of days, finally thought I'd post before I found the solution, but alas I cannot
EDIT: I just tried the "xv" video output in Xine player and watched a tv episode (.avi), I noticed that it is almost every 1 minute that it does this little tiny frame drop/jitter. Could it be some process doing something at 1 minute intervals? I have an empty cron.
My process list:
bobby@dabox:~$ ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 1612 544 ? Ss 14:25 0:01 init [3]
root 2 0.0 0.0 0 0 ? S< 14:25 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S< 14:25 0:00 [migration/0]
root 4 0.0 0.0 0 0 ? S< 14:25 0:01 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S< 14:25 0:00 [watchdog/0]
root 6 0.0 0.0 0 0 ? S< 14:25 0:00 [migration/1]
root 7 0.0 0.0 0 0 ? S< 14:25 0:00 [ksoftirqd/1]
root 8 0.0 0.0 0 0 ? S< 14:25 0:00 [watchdog/1]
root 9 0.0 0.0 0 0 ? S< 14:25 0:00 [events/0]
root 10 0.0 0.0 0 0 ? S< 14:25 0:00 [events/1]
root 11 0.0 0.0 0 0 ? S< 14:25 0:00 [khelper]
root 47 0.0 0.0 0 0 ? S< 14:25 0:01 [kblockd/0]
root 48 0.0 0.0 0 0 ? S< 14:25 0:00 [kblockd/1]
root 51 0.0 0.0 0 0 ? S< 14:25 0:00 [kacpid]
root 52 0.0 0.0 0 0 ? S< 14:25 0:00 [kacpi_notify]
root 151 0.0 0.0 0 0 ? S< 14:25 0:00 [kseriod]
root 181 0.0 0.0 0 0 ? S 14:25 0:00 [pdflush]
root 182 0.0 0.0 0 0 ? S 14:25 0:01 [pdflush]
root 183 0.0 0.0 0 0 ? S< 14:25 0:02 [kswapd0]
root 235 0.0 0.0 0 0 ? S< 14:25 0:00 [aio/0]
root 236 0.0 0.0 0 0 ? S< 14:25 0:00 [aio/1]
root 319 0.0 0.0 0 0 ? S< 14:25 0:00 [khvcd]
root 383 0.0 0.0 0 0 ? S< 14:25 0:00 [rpciod/0]
root 384 0.0 0.0 0 0 ? S< 14:25 0:00 [rpciod/1]
root 395 0.0 0.0 0 0 ? S< 14:25 0:02 [ata/0]
root 396 0.0 0.0 0 0 ? S< 14:25 0:00 [ata/1]
root 397 0.0 0.0 0 0 ? S< 14:25 0:00 [ata_aux]
root 402 0.0 0.0 0 0 ? S< 14:25 0:00 [scsi_eh_0]
root 404 0.0 0.0 0 0 ? S< 14:25 0:00 [scsi_eh_1]
root 422 0.0 0.0 0 0 ? S< 14:25 0:00 [scsi_eh_2]
root 424 0.0 0.0 0 0 ? S< 14:25 0:00 [scsi_eh_3]
root 987 0.0 0.0 0 0 ? S< 18:36 0:00 [scsi_eh_4]
root 988 0.0 0.0 0 0 ? S< 18:36 0:00 [usb-storage]
root 1082 0.0 0.0 0 0 ? S< 14:25 0:00 [ksuspend_usbd]
root 1139 0.0 0.0 0 0 ? S< 14:25 0:00 [khubd]
root 1486 0.0 0.0 0 0 ? S< 14:25 0:02 [kjournald]
root 1533 0.0 0.0 1812 612 ? S<s 14:25 0:00 /sbin/udevd --daemon
root 2779 0.0 0.0 0 0 ? S< 14:25 0:00 [kgameportd]
root 5776 0.0 0.0 0 0 ? S< 14:26 0:00 [kpsmoused]
root 6994 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 6995 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 6996 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 6997 0.0 0.0 0 0 ? S< 14:35 0:01 [kjournald]
root 6998 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 6999 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 7000 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 7001 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 7002 0.0 0.0 0 0 ? S< 14:35 0:00 [kjournald]
root 7298 0.0 0.0 2248 816 ? Ss 14:35 0:00 /usr/sbin/syslog-ng
root 7313 0.0 0.0 1772 264 ? Ss 14:35 0:00 /sbin/dhcpcd -N -R -t 30 -h dabox eth0
root 7342 0.0 0.0 1644 556 ? S 14:35 0:00 /usr/sbin/crond
dbus 7357 0.0 0.0 2392 1128 ? Ss 14:35 0:14 /usr/bin/dbus-daemon --system
hal 7360 0.0 0.2 5048 3344 ? Ss 14:35 0:09 /usr/sbin/hald
root 7361 0.0 0.0 3156 1140 ? S 14:35 0:00 hald-runner
root 7373 0.0 0.0 3244 1204 ? S 14:35 0:01 hald-addon-input: Listening on /dev/input/event5 /dev/input/event4 /dev/input/event3 /dev/input/event2
hal 7376 0.0 0.0 2060 884 ? S 14:35 0:00 hald-addon-acpi: listening on acpi kernel interface /proc/acpi/event
root 7391 0.0 0.0 3244 1200 ? S 14:35 0:08 hald-addon-storage: polling /dev/sr0 (every 2 sec)
root 7393 0.0 0.0 3244 1200 ? S 14:35 0:08 hald-addon-storage: polling /dev/sr1 (every 2 sec)
bin 7417 0.0 0.0 1720 460 ? Ss 14:36 0:00 /sbin/portmap
root 7420 0.0 0.0 3492 1196 ? Ss 14:36 0:04 /usr/sbin/famd -T 0 -c /etc/fam/fam.conf
root 7455 0.0 0.1 12848 1476 ? Ss 14:36 0:00 /usr/sbin/gdm-binary
root 7458 0.0 0.2 13224 2784 ? S 14:36 0:00 /usr/sbin/gdm-binary
root 7500 0.0 0.0 1612 500 tty1 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/1 linux
root 7501 0.0 0.0 1612 504 tty2 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/2 linux
root 7502 0.0 0.0 1612 504 tty3 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/3 linux
root 7503 0.0 0.0 1612 500 tty4 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/4 linux
root 7504 0.0 0.0 1612 500 tty5 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/5 linux
root 7505 0.0 0.0 1612 504 tty6 Ss+ 14:36 0:00 /sbin/agetty -8 38400 vc/6 linux
bobby 7578 0.0 0.2 6708 3756 ? S 14:36 0:01 /usr/lib/GConf/gconfd-2 6
bobby 15763 0.0 0.0 2256 1128 ? Ss 21:01 0:00 /usr/bin/dbus-daemon --fork --print-pid 13 --print-address 15 --session
bobby 15838 0.0 0.2 9652 3732 ? S 21:02 0:00 /usr/lib/gnome-vfs-2.0/gnome-vfs-daemon
root 26444 5.5 3.7 53900 48032 tty7 SLs+ 22:53 2:07 /usr/bin/Xorg :0 -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
bobby 26462 0.6 0.4 11160 6376 ? Ss 22:53 0:14 /usr/bin/fluxbox
bobby 26480 0.0 0.0 4868 604 ? Ss 22:53 0:00 /usr/bin/ssh-agent -- /usr/bin/startfluxbox
bobby 26499 0.0 0.3 19168 4992 ? Ss 22:53 0:01 gnome-volume-manager
bobby 26502 0.0 0.0 2256 1096 ? Ss 22:53 0:00 /usr/bin/dbus-daemon --fork --print-pid 13 --print-address 15 --session
bobby 26505 0.3 0.2 19352 2836 ? Sl 22:53 0:07 conky
bobby 26506 0.0 0.5 22096 7620 ? Ss 22:53 0:00 gnome-power-manager
bobby 26508 0.1 0.2 13696 3560 ? Ss 22:53 0:03 gnome-screensaver
root 26536 0.0 0.0 0 0 ? S< 22:53 0:00 [kjournald]
root 26550 0.0 0.0 0 0 ? S< 22:53 0:00 [kjournald]
root 26566 0.0 0.0 0 0 ? S< 22:53 0:00 [kjournald]
bobby 26607 0.0 0.2 9652 3624 ? S 22:53 0:00 /usr/lib/gnome-vfs-2.0/gnome-vfs-daemon
bobby 26634 0.3 1.8 77552 24140 ? Ss 22:54 0:08 /usr/bin/nautilus /mnt/video --no-desktop
bobby 26637 0.0 0.2 24332 2804 ? Ssl 22:54 0:00 /usr/lib/bonobo/bonobo-activation-server --ac-activate --ior-output-fd=22
bobby 26652 0.0 0.0 2444 792 ? S 22:54 0:00 /usr/lib/nautilus-cd-burner/mapping-daemon
bobby 27182 0.0 0.7 39688 10292 ? Sl 22:57 0:01 /usr/bin/gnome-settings-daemon
bobby 27239 0.0 0.0 2860 328 ? S 22:57 0:00 dbus-launch --autolaunch f1f99a3c140ac785a9aa54004765db00 --binary-syntax
bobby 27240 0.0 0.0 2256 1056 ? Ss 22:57 0:00 /usr/bin/dbus-daemon --fork --print-pid 11 --print-address 14 --session
bobby 27242 0.0 0.2 9652 3624 ? S 22:57 0:00 /usr/lib/gnome-vfs-2.0/gnome-vfs-daemon
bobby 27422 0.0 2.0 42360 27016 ? Ss 22:59 0:01 nvidia-settings
bobby 27760 0.0 0.1 4228 1400 ? Ss 23:02 0:00 /bin/sh /opt/mozilla/bin/firefox
bobby 27764 0.0 0.1 4228 1424 ? S 23:02 0:00 /bin/sh /opt/mozilla/lib/firefox-2.0.0.11/run-mozilla.sh /opt/mozilla/lib/firefox-2.0.0.11/firefox-bin
bobby 27769 3.7 5.7 194596 74408 ? Sl 23:02 1:03 /opt/mozilla/lib/firefox-2.0.0.11/firefox-bin
bobby 30469 1.7 1.2 41288 15612 ? Ssl 23:30 0:00 gnome-terminal
bobby 30471 0.0 0.0 2444 644 ? S 23:30 0:00 gnome-pty-helper
bobby 30472 0.0 0.1 4536 1756 pts/0 Ss 23:30 0:00 bash
bobby 30537 0.0 0.0 3580 996 pts/0 R+ 23:31 0:00 ps aux
bobby@dabox:~$
Last edited by colbert (2007-12-20 04:31:42)
Well it's amazing, the simplest answer is usually right, albeit the one most often overlooked! (At least by me;))
I had a random, Einsteinian thought to kill conky and whaddaya know, my video is playing superbly thus far I hope anyone that runs into this can reference this should they also be running conky. It normally takes up no cpu, but the flickering of it apparently randomly has the effect on the video.
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Many thanks for your very long reply and your interest in my problems.
I shall try to answer you :
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I hope my answer will be usefull for you.
Regards,
Jacques Gourier.
Le 11/02/2014 19:53, Stan Jones a écrit :
>
Re: Media pending with Encore CS6
created by Stan Jones <http://forums.adobe.com/people/Stan+Jones> in
/Encore/ - View the full discussion
<http://forums.adobe.com/message/6110278#6110278 -
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package com.literacysoft
import flash.display.Sprite;
import flash.events.Event;
import flash.events.NetStatusEvent;
import flash.events.StageVideoAvailabilityEvent;
import flash.events.StageVideoEvent;
import flash.geom.Rectangle;
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private var stageVideoAvail:Boolean;
private var sv:StageVideo;
private var videoUrl;
private var vidWidth;
private var vidHeight;
public var theStage;
private var vid;
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private var myY;
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myX = x;
myY = y;
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vidHeight = h;
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vid = new Video(vidWidth, vidHeight);
theStage.addChild(vid);
vid.attachNetStream(ns);
vid.x = myX;
vid.y = myY;
vid.smoothing = true;
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trace('not');
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trace("event.info.code "+event.info.code);
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trace("NetConnection.Connect.Success");
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if (!stageVideoAvail){
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theStage.removeChild(vid);
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theStage.addChild(vid);
theStage.setChildIndex(vid, 0);
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trace("rendering video",sv.viewPort);
sv.viewPort = new Rectangle(myX, myY, vidWidth, vidHeight);
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Video Playback Fine On iPhone - Horrible On Computer
Seen others with this issue. But think this is NOT talked about enough, therefore NOT addressed. Hopefully someone can help me ?
Summary: Record video on iPhone, plays back great on iPhone ( A PHONE !!). Get raw footage to a computer, video plays back horribly choppy and audio out of sync (on a COMPUTER !!). Results for me are the same on ALL players on my computer. Others seem to have it play fine with VLC, but not me.
Here's my stats:
iPhone 4, lastest O.S., latest update.
Computer - PowerBook (laptop) G4 17", 1.67Ghz Aluminum Last PPC Edition (Higher Res model), 2 GB Ram, ALL up to date, latest possible O.S., etc..
Players tested with SAME horrible results - Quicktime PRO (default .mov file), VLC, iTunes, WMV, Flip For Mac. ALL latest versions for above computer at least, etc..
I shoot some video (any length) with my iPhone 4 (which has no video camera settings, sooooo...IDK). Video plays back flawless on iPhone.
Plug iPhone into computer, download RAW uncompressed footage to desktop via "Image Capture". From that moment on (if viewing on computer), the raw footage's movie file) video playback acts like computer can't handle its quality, (choppy, skipping lots of frames, timing horribly off, etc..). Reacts same way with ANY player I use. Actually VLC is the worse, it just completely chokes. Quicktime PRO will at least play it, just horribly choppy. ALL players are up to date.
BUT if I burn a video DVD of it using Toast Pro, etc... then play it on convential DVD player and TV, it plays back awesome ! ALSO, if I "export for web" in Quicktime PRO and wait a amazing amount of time, I get a new file (MP4 or something), and that file will play fine on any player in my computer. BUT it is of a low quality, in which is BS that I have to go so low to view it cause I've played other videos downloaded from the net, or various places and they playback fine via QT or ANY player for that matter. Full screen, high res videos too !!
So I ask, what is the issue ? And why has this not been extensively discussed here and why has Apple not at least publically acknowledged this issue and gave its official word ? Is there something I can do ? Why can't the iPhone have camera settings on it to allow me to lower its video quality ? Or more importantly, why can't my computer seem to handle a simple video file that is really NOT true HD (which is 1920x1080) ? Its honestly not even much above TV resolution (720 x something). My computers screen resolution is 1680 x 1050 dpi, and my video card is a ATI Mobility Radeon 9700, AGP 128.
I could be mistaken, but I am almost sure I've downloaded and viewed movies (in file format) via QT that are of a highe res, better quality even and they playback fine. So can I get some clarification on this please ? Whats going on with the iPhones video capture ? Is it out of frame rate ? Or what ?
Thanks for anyones time --mcsound wrote:
Given the specs of your computer, I would not expect smooth playback of HD video. You definitely lack the processor power and are fairly low on the amount of RAM need to do so.
Hi mcsound, thanks for chiming in to help.
I don't know if I agree with this. Mathematic reasoning just don't support this. I agree consumerism does though - lol.
Playing HD don't take much resources, as my old xBox 360 plays HD movies just fine. But the real point is, 1280 x 720 is not HD, sure its a higher res than standard TV, but not by some overwhelming amount that causes issues like this. I can play other high res videos on this computer just fine, from DVD (which actually should be more taxing on the computer), and also from file (which is literally the same).
The xBox 360 has less processing power and less ram than my old "out of spec" computer, and it plays HD movies just fine. Point to all this is, it just aint adding up. The first inclination I agree, is to go buy a new computer. But, if you do the math, there is no reason why a 1.67Ghz processor can't play HD movies. Cause actually, it can, my computer plays them fine in iMovie, and edits HD video and renders HD video and burns HD video, and real 1920 x 1080 HD video, not this faux HD of 1280 x 720. So see how this is not adding up ?
RAM has nothing to do with this either. Playing movies from file or disc uses almost no ram. But editing film does for sure, and at that, these 2GB of ram I got has edited, rendered and made plenty of HD movies.
Look at the screenshots I supplied, the before and during screens of the "System Memory" (RAM) shows that while playing the faux HD iPhone clip, it used only 100mb of Ram.
So again, no reason to think it is the specs of the computer. I agree it could be the video card, or processor MAYBE, but again, why does other HD clips/movies play on this computer smoothly, while anyone taken from the iPhone doesn't ?
If it is the case that the iPhone is just taking a amazingly high quality of 1280 x 720 (higher than other 1280 x 720 cameras for some other reason), then why in the world would Apple not give the iPhone a camera setting to allow us to pick "capture" setting optimized for the end result application we plan on using ?
Either way, this is not ok, and either way, its funny how it gets most people buying into the whole "consumerism" thing. Which is the last thing we need. Don't get me wrong, I buy things like crazy, and will be buying a couple new computers soon, BUT there is no need for it to play HD or several other things people think. HD is not rocket science, and again, HD is old and was supported even when my computer came out. My screen resolution exceeds the iPhones video clips resolution !
There is some framerate controversy I think, or something that the iPhone is doing that other sources are not. But I just can't find it out, and I find it strange there is not more talk about this. -
Problem with Mac Pro Video Playback Stutter
I just purchased a new Mac Pro (2.66 GHz Quad-Core Intel Xeon with 6GB of Memory) and I'm having an issue with video playback. Whenever I play videos (in Quicktime, online, or in iTunes) the video will freeze briefly every few seconds, causing an annoying stutter that drives me crazy. Sometimes if I restart the computer the video will play normally, but not always. It is quite frustrating for me to have this issue, because I do a lot of video work and would also like to use the machine for watching movies on the Cinema Display I got with it.
Does anyone have any idea what might cause a problem like this? I got the NVIDIA GeForce GT 120 card with 512 MB of VRAM. Thanks in advance for any help.Comparison of GTX 285 amd 8800GT in Mac OS and Windows XP:
http://www.evga.com/forums/tm.asp?m=100785469&mpage=1&key=&#100785469
.... will be interesting to see if improved drives help close the gap but 20% (most of the time, drivers will show 5-10% at best in a single jump, in some apps).
Having looked at and used alternatives, helps gives me some perspective. I use to assume or think QuickTime was or must be "it" but there are other apps that can play back video with more finesse, more user control. Maybe why QuickTimeX is getting some buzz.
People will build PCs to run 3 x 285s in SLI and try to achieve 175 fps, output to HDTV or something for full 'immersion' field effect. -
Online video playback is severally laggy/choppy on my macbook pro 2011?
hey guys, got a bit of an issue here. I've been noticing some SEVERE lagging issues whilst viewing online (streaming) video, from various sites, including, novamov, youtube, and others. the videos rarely stop to buffer as i have a fast connection, but yet they still seem to lag wildly. what i mean by this, is the sound will continue as normal, the the picture will freeze sometimes for a good 5 seconds or so before resuming, this is happening increasingly more and more..
i am running Mac OSX Lion (latest Update) on my:
MacBook Pro
17-inch, Early 2011
Processor 2.3 GHz Intel Core i7
Memory 8 GB 1333 MHz DDR3
Graphics Intel HD Graphics 3000 512 MB
Software Mac OS X Lion 10.7.3 (11D50b)
If it helps my hard drive space is:
Macintosh HD
Capacity: 664 GB
Available: 179.79 GB
The browser i am using is the latest version of Safari, although i have tried firefox and chrome and i experience the same issue.
I have Sophos anti-virus installed and run regular scans on my system (all clear)
i really can't think of anything else which could be causing an issue here. I haven't installed any additional software for a while, not in the time frame since the error started to occur.
I am quite surprised to be experiencing such issues as lagging on something as simple as a youtube video when my £3000+ computer handles heavy applications such as Final cut pro and Photoshop with ease...
i MUST be missing something here,
I really would appreciate any help i can get here.
thankyou very much for your time
benHey Carolyn,
Worked a treat, de-jaggy video for first time in months!!! Only point of clarification, I manually deleted the Flash plug-in before I uninstalled Flash. Don't know if this was why it worked for me rather than others but hey ...
Thanks again!
Jody
Carolyn Samit
Re: Online video playback is severally laggy/choppy on my macbook pro 2011?
Apr 26, 2012 5:07 PM (in response to bcusick)
Hi Ben...
I am quite surprised to be experiencing such issues as lagging on something as simple as a youtube video
Try troubleshooting the Flash plugin required for most YouTube video.
Quit all open browsers. I'm using Safari as a test.
Open System Preferences > Flash Player then select the Storage tab. Click: Delete All
Now uninstall the Flash plugin then reinstall new > Troubleshoot Flash Player | Mac OS
Make sure and uninstall the current plugin first.
Then launch Safari. From your Safari menu bar click Safari > Empty Cache
Now try a video.
BTW... if you have the ClickToFlash extension installed, that can prevent Flash based video from streaming. It can also be installed as a plugin in /Library/Internet-Plug-Ins.
And check to see if Safari is running in 32 bit mode. Right or control click the Safari icon in your Applications folder then click Get Info. If the box next to: Open in 32 bit mode is selected, deselect, quit then relaunch Safari.
edited by: cs -
DVD Player freezes video playback, but audio continues
Whenever I insert a DVD into my Macbook Pro, DVD Player starts playing the DVD's audio, but the video playback will only run if I have my mouse positioned at the bottom of the screen. If the mouse is moved anywhere toward the middle of the video, it freezes on the image while audio playback continues. This has happened with multiple DVDs and all run fine on any other player (VLC, etc).
I have the same issue fairly regularly with DVDs when played back using the Apple DVD Player app. The same DVDs work fine with VLC.
While rebooting helps, it doesn't actually fix anything. The same goes for resetting PRAM and other stuff. The problem persists, albeit intermittently. I've rebooted and have had a DVD exhibit the same exact problems right away. And then I try VLC and it runs fine.
There are three variables that I can point to...
Apple DVD Player application... as noted above, the issue does not occur at all with VLC
Memory... it's possible that the Apple DVD Player app hits on a bad stretch of memory, it causes this kind of problem. Still this points to the application as the issue does not occur in other playback apps.
Video Card... on my macbook pro it's the NVIDIA 320M. Again, the playback is fine in other playback apps, so this still points back to the Apple DVD Player app, but it's possible that it has issues with the video card
That's all I can think of off the top of my head. I hope Apple will fix the problem, and I'm OK with using VLC until it gets fixed, but there is at least one feature of Apple's DVD Player app that I love... it remembers exactly where I was at even if I take the DVD out to play something else. VLC Player does not appear to have that functionality (at least not that I've found thus far). -
Intermittent stalling during audio/video playback
This issue is driving me up the wall. I hope someone can help.
Often, while listening to (for example) iTunes, playback stalls and there is silence for several seconds. If I listen to music for an hour, I guess I might experience the issue anywhere from 3-6 (?) times — though sometimes I can go for more than an hour without it happening. But: it doesn't just happen with iTunes — the same thing happens from time to time when using VLC for video playback (usually accompanied by some video artifacts), or HTML5 video playback within Safari. (I don't have Flash Player installed, though I occasionally use Google Chrome for Flash content; if I recall correctly I think the same thing sometimes happens with Flash videos/audio within Chrome too.)
Along the same lines, now and then I notice that when attempting an action within Mail.app, a task will appear in the Activity Window that's something like, 'waiting for the hard drive,' with a barber pole and stop sign. This will delay my action for several seconds. I suspect this is a different manifestation of the same underlying problem that causes the playback stalling.
I DON'T typically get the swirling beach ball of doom when any of these things happen. Mouse pointer does NOT freeze, and the system seems responsive in all other ways during these episodes.
I'm pretty Mac savvy, and I make sure to do regular hard drive maintenance (verifying volume with Disk Utility, rebuilding directory with DiskWarrior, etc.). My startup partition is only about 2/3 full. This week I used iDefrag to defrag the hard drive, thinking it might fix the problem, but nope it still happens. SMART diagnostics have never shown a problem.
When researching this issue on the web, some folks have suggested keeping an eye on the log files (Console.app), and Activity Monitor. I definitely haven't found anything in the log files that coincides with incidents of stalling. And nothing in particular seems to 'spike' in CPU activity in the Activity Monitor at the same time as the stalling; at least not that I've noticed.
I'm pretty good about keeping apps up to date, and I don't have too many apps running in the background. But the problem persists even when I've quit everything else except the app that's doing the audio/video playback.
This has been going on for a long time, and nothing I've tried has helped. Any advice or suggestions, anyone??
- GordChecking Console.app messages once again, the following lines seem to coincide with at least some of the stalling incidents:
===
2013/03/05 1:32:33.231 am Finder[595]: PlotISImageRef 0x29f50026 InContext 0x7f986b3c1340 in {33.000000,493.000000,16.000000,16.000000}, inAlign:5, inTransform:0, inFlags:0 failed. (err=-2582)
2013/03/05 1:32:34.499 am Dock[590]: no information back from LS about running process
2013/03/05 1:34:58.597 am Safari[8023]: PlotISImageRef 0x20990018 InContext 0x7ffb9b9d6ea0 in {33.000000,493.000000,16.000000,16.000000}, inAlign:5, inTransform:0, inFlags:0 failed. (err=-2582)
2013/03/05 1:35:00.853 am Dock[590]: no information back from LS about running process
2013/03/05 1:35:39.917 am TextEdit[8026]: PlotISImageRef 0x25910017 InContext 0x7f8873a45940 in {33.000000,493.000000,16.000000,16.000000}, inAlign:5, inTransform:0, inFlags:0 failed. (err=-2582)
2013/03/05 1:35:41.186 am Dock[590]: no information back from LS about running process
2013/03/05 1:42:14.318 am Finder[595]: PlotISImageRef 0x29f50026 InContext 0x7f986c064400 in {33.000000,514.000000,16.000000,16.000000}, inAlign:5, inTransform:0, inFlags:0 failed. (err=-2582)
2013/03/05 1:42:15.986 am Dock[590]: no information back from LS about running process
===
Any significance to this? Thanks for any help.
- Gord -
ITunes 11 HD video playback slow/choppy/stutter/skipping in OSX
Hi guys,
I'm running iTunes 11.0.1 in OS 10.8.2 on my 2.66 GHzm, 8 GB RAM MacBook Pro and playback in HD (1080p) movies/TV shows in iTunes is slow, choppy, stuttering and skipping. Can't seem to fix it. Any help would be greatly appreciated!
Thanks!I was having this same problem, and found one cause.
I have an extensive library on a Drobo FS. None of the AppleTV's in the house have any problem streaming full 1080p from it, but my new iMac does. Choppy / laggy video play. Movies and TV shows right from the iTunes store. I can have 3 TV's streaming, and even a 4th laptop, all streaming from the iMac iTunes using the Drobo. They all have zero issues. No lag, no choppy, nothing. iMac has the issue even when nothing else is running. Every time.
BTW, it's happend on my old iMac and the brand new one, both with iTunes 11.
I was told to try setting up a second account on my iMac, and try playing video there. It worked. No problems at all. Weird.
So I started looking at differences between the new account, and my standard. I'd already made sure nothing unusual was running, and no processor hogs (not that anything short of Handbrake at full settings has come close to pegging out the processers on the new box). I found one thing, that made a difference. I had Timemachine backups, going to the same Drobo FS (though a different partition) turned on on the iMac.
Timemachine was running the whole time, and didn't impact any other streaming from the same machine, but it did make iTunes video playback of 1080p movies skip like my 6 year old daughter on the iMac. I turned it off.... no more skipping. I've watched 5 TV shows and 2 movies on that account, and not had another single incident.
Obviously, there is still a problem. The iMac and Drobo have enough bandwidth that they can do all the work at the same time (or I'd be seeing the problem on the other devices while streaming), but they are not playing well together on the same account. I've also checked the throughput to the Drobo FS from the iMac... way more than necessary. If it were a read / write thing on the Drobo, then I'd expect other devices to see the issue when I'm watching something on the iMac that is skipping, but there was still no skipping on any other device at that same time...
But, as I said, I found the root cause in my case. I can turn off Timemachine backups while I'm watching a movie on the iMac, or I can move where I write the Timemachine backups to (going to try this over the weekend to be sure it works). If moving the Timemachine backup to a different drive doesn't work, it's a bigger problem.
I'd really love to see Apple fix this and the issue where I have to turn iTunes on in 32bit mode when using an external library (of it gives the funky quicktime error until you delete and readd the movie).
Hope this helps some of you, if not all. -
Hello,
I previously had no problems playing videos in iTunes. Recently, however, video playback becomes choppy about 10 seconds in, while audio remains fine. This happens both with my own ripped videos and with iTunes Store videos, at 100% view (i.e., not fullscreen or anything). Looking at Activity Monitor, iTunes begins to eat up 90-105% CPU.
I only have a few apps running (e.g., Camino, iChat, Mail), and everything is responsive until iTunes starts chugging away, at which point my whole system slows down. Can anyone help shed some light on what is going on?I've been having the same problem on my G4. I created a second user account and noticed that videos play perfectly there, just not in my normal account. I'm now trying to troubleshoot from there to see if it's some third party thing or widget or something that is the cause. Maybe someone else could try the same thing - create another account and see if that solves the problem - then go back and try troubleshooting their regular account. This seems like it could be a solvable problem to me at this point. Please post your results.
-
Does anyone have problems with video playback, jerky video?
Video playback on my MacBook Pro is jerky, really not workable at all. Has anyone else had a similar problem?
This is my pet checklist for questions regarding FCP X performance - you may have already addressed some of the items but it's worth checking.
Check the spec of your Mac against the system requirements:
http://www.apple.com/finalcutpro/specs/
Check the spec of your graphics card. If it's listed here, it's not suitable:
http://support.apple.com/kb/HT4664
Make sure you're using the latest version of the application - FCP X 10.0.3 runs very well on my 2009 MacPro 2 x 2.26 GHz Quad-Core Intel Xeon with 16 GB RAM and ATI Radeon HD 5870 1024 MB. I run it with Lion 10.7.3.
Check that you have at least 20% free space on your system drive.
If you have not already done so, move your Projects and Events to a fast (Firewire 800 or faster) external HD. Make sure the drive's formatted OS Extended (journalling's not required for video). You should always keep at least 20% free space on the Hard Drives that your Media, Projects and Events are on.
If you are getting crashes, there is some conflict on the OS. Create a new (admin) user account on your system. Do NOT import any of the settings etc from the old account - simply use FCP X from there - if it runs a lot better, there's a conflict and a clean install would be recommended - but remember, if you reinstall the system, and then use Migration Assistant (or anything else) to import all your old settings etc etc, you may well be importing the cause of the conflict in the first place.
Keep projects to 20 mins or less (about half that for Multicam). If you have a long project, work on short sections, make them into Compound Clips and then paste these into a final project for export.
If you ever experience dropped frames, I strongly recommend you use ProRes 422 Proxy - it edits and plays back like silk because the files are small but lightly compressed (not much packing and unpacking to do) - but remember to select 'Original or Optimised Media' (FCP X Preferences > Playback) just before you export your movie, otherwise it will be exported at low resolution.
If you have plenty of processor power, for the ultimate editing experience, create Optimised Media - most camera native files are highly compressed and need a great deal of processor power to play back - particularly if you add titles, filters or effects. ProRes 422 takes up much more hard drive space but is very lightly compressed. It edits and plays back superbly.
Hide Audio Waveforms at all times when you don't need them (both in Browser and Storyline / Timeline). They take up a lot of processor power. (Use the switch icon at the bottom-right of your timeline to select a format without waveforms if you don't need them at the moment, then switch back when you do).
Create folders in the Project and Events libraries and put any projects you are not working on currently, in those folders. This will help a lot. There's a great application for this, called Event Manager X - for the tiny cost it's an invaluable application.
http://assistedediting.intelligentassistance.com/EventManagerX/
Unless you cannot edit and playback without it, turn off Background Rendering in Preferences (under Playback) - this will help general performance and you can always render when you need to by selecting the clip (or clips) and pressing Ctrl+R.
The biggest single improvement I saw in performance was when I upgraded the RAM from 8 GB to 16.
Andy
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