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-   -   FZ150 jerky playback (https://forums.steves-digicams.com/what-camera-should-i-buy-80/fz150-jerky-playback-213760/)

Shinnen Feb 2, 2015 3:08 PM

FZ150 jerky playback
 
Hi,
I was testing a new SDHC card today to see how it performs, and the playback was very jerky, both audio and video. I haven't used the video since summer, and it was great then. (I have it set for MP4/FHD.) I tried several other cards with the same result. It looks normal when recording, and the stills seem fine; but when I transfer the card to the reader and play it, it's jerky. I've tried putting other videos on the card, and they play fine, so it doesn't seem to be the card or Windows(XP).
Any thoughts are appreciated.
Thanks,
.... john

SIMON40 Feb 2, 2015 6:24 PM

My old XP computer won't play my FZ150's FHD... I have to use the 1280x720 or 640x480...
A pretty fast system is required for full HD playback.
The "other" videos... I'm guessing they weren't recorded in full HD ?

Shinnen Feb 2, 2015 10:20 PM

Hi Simon,
It appears as if you're right, although I could have sworn I took the 'summer' video in FHD. (But I no longer have it, so can't check.) When I switch to HD, the playback is fine. The 'other' videos are not from my camera, so I have no idea what they are. (They're mostly from the net, and have an MP4 tag.)
Thanks for your help. I'll do some more testing, and let you know if I find out anything more.
....... john
P.S. I love this camera

pcake Feb 3, 2015 1:24 AM

do you actually transfer the video to your computer before you play it? it's not going to be as smooth played from the card reader.

SIMON40 Feb 3, 2015 11:50 AM

Quote:

Originally Posted by Shinnen (Post 1386362)
Hi Simon,
It appears as if you're right, although I could have sworn I took the 'summer' video in FHD. (But I no longer have it, so can't check.) When I switch to HD, the playback is fine. The 'other' videos are not from my camera, so I have no idea what they are. (They're mostly from the net, and have an MP4 tag.)
Thanks for your help. I'll do some more testing, and let you know if I find out anything more.
....... john
P.S. I love this camera

I love mine also... :)

Shinnen Feb 4, 2015 11:50 AM

Hi pcake,
No, I've been playing it from the card. I'll try tranferring, and see if that's better.
.... john

VTphotog Feb 5, 2015 6:40 AM

Does the video play back smoothly in the camera?
What class is the SD card? You probably need a class 10 card for full HD video.
Do you format the card each time prior to using it?

Shinnen Feb 5, 2015 8:41 AM

Hi VTphotog,
Yes, it does play back smoothly in the camera. The card is a class 4, which is what I've been using for a long time. No, I never format my cards, unless I have problems with them.
I just bought a class 10 (Retail Plus brand, that I've read mixed reviews about) which was very cheap, so I'll give that a try.
..... john
P.S. I just tried the 'class 10' card, with the same result, jerky playback on the computer .... on the camera it plays back fine. I'm thinking that Simon's right, and that my computer does not have enough smack to play FHD. Unless someone has a better idea I think I'll find someone who has a fast computer and see how it works on their machine.

TCav Feb 5, 2015 9:35 AM

  1. If you never reformat your SD Card, the file allocation table will become fragmented, and over time, will perform less and less well.
  2. The SC Card Association that instituted the SD Card Speed Class system of rating the performance of SD Cards, relies on the honor system of having manufacturers rate their own cards. I'm certain that in all instances, manufacturers always rate their products honestly to give consumers the best information possible.

pcake Feb 5, 2015 9:51 AM

my cards often don't play smoothly on my computer but my videos play smoothly in the camera and in the computer. i use very fast cards and reformat regularly, btw.

Shinnen Feb 5, 2015 10:10 AM

Oops. I made the same mistake again ...... I tried to play the video from the SD card. When I transfered it to the computer, it played fine. So it looks like that's my problem, trying to play the videos from the sd card.
I apologize for wasting your time. I should know better; but I'm so used to using the SD card for pictures, that I forgot about the speed restrictions from card to computer.
Thanks again,
.... john
P.S. This is probably also why I'm having trouble playing *.mov files from a little point and shoot (EasyShareM380) that I've been experimenting with as a dash cam. They also don't play well from the SD card, and they're much larger files ~4 gig.

pcake Feb 6, 2015 8:05 AM

glad you got things sorted out so you can watch your videos smoothly :)

Shinnen Feb 6, 2015 11:28 AM

Hi TCav,
"If you never reformat your SD Card, the file allocation table will become fragmented, and over time, will perform less and less well."
Thanks. I wasn't aware of this. I guess I'll have to format mine occasionally.
...... john

Shinnen Feb 15, 2015 10:02 AM

The Reader's the thing.
 
Last night I decided to test my new off brand (retailplus) 8 gig 'class 10' card to see if it's as fast as they say, i.e. a class 10; but when I plugged it into my card reader (a good band name one) it read and wrote at 1 mb/sec. (using H2testW), and so did my other class 10 (Lexar) and a class 4 card ..... something wrong here. So, I went back to my old reader, that gave my readings of 10/16 mb/sec, for both class 10's and slightly less for the class 4.
So, now I'm thinking that all card reader's are not created equal .... well.... duh ..... and that the slow reader is the main reason I haven't been able to play HD from my camera.
This of course begs the question, that if the theoretical maximum speed of a USB 2 port is 480mbs/second, what speed could a good card reader reach.
If anyone is interested in testing their reader (the H2testW utility can be had for free on line) I'd be interested in hearing the results.
.... john
P.S. I don't think computer speed is a factor here. My computer's memory benchmarks read at well over 2600mb/sec.

VTphotog Feb 15, 2015 7:53 PM

It sounds as if the card reader or the cable for it, isn't rated for USB 2.0. I have an older one which is definitely USB 1.0, and it is about as fast as what you report for yours. The one I use now is built in to the front panel of my PC. Haven't tested the speed, but it will play full HD video just fine.
The only other thing I would question is your media player having the necessary codecs for the video format you're using, but if it works from your hard drive, that shouldn't be the problem.
brian

Shinnen Feb 15, 2015 10:32 PM

Hi Brian,
It's funny that you mention the cable; because after posting my last message I found out that the problem was not the card reader, but the interface connector I was using to connect the USB cable to the USB 'B' port (the square port) on the card reader. When I connected the reader to the computer using a cable that had the square connector at the reader end, then I got readings similar to what I was getting on the other reader.
Thanks for your help.
..... john
P.S. Just for the hell of it, I check the speed of one of my pen drives and got a read/write speed of 24/11 mb/sec. The class 10 sd card gave me 17/10 read/write, not a great difference.


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