Forum Archive Home -> Camcorders (DV/HDV/AVCHD) -> Sony HDR-SR7 recorded video jumping around...
Sony HDR-SR7 recorded video jumping around... | ||||
| MikeZZZZ posted 2009 Oct 16 14:55 | ||||
| I have an HDR-SR7 that is about 2.5 years old. We used it in the morning the other day and it was fine. Went to use it again later that day and the autofocus had stopped working and the video came out blurry and jumped around. Take a look at the sample video below. The video looks the same when played in the camera. Later that afternoon, after several powercylces, the camera began working normally again. Sony support says to take it in for service.
I tried several things in Sony Vegas to correct it, but nothing worked very well. Has anyone seen this effect before, or know of any way I can clean up this video? http://www.macpamedia.org/media/temp/test3.wmv Thanks, Mike | ||||
| poisondeathray posted 2009 Oct 16 15:23 | ||||
| I doubt there is much you can do to salvage it.
You could try deshaker in vdub to help a bit, but there is much more "wrong" with that video than simple shaking. There is intraframe "warping". You might try sharpening it a bit too, but it really is a mess What was the original recording format? 1080i30 avchd? 720p30? or something else? There is a chance you could do a better job on the original video (e.g. if you had access to the original fields if it was interlaced). Did you blend de-interlace in vegas? (this will worsen the blurriness) Maybe you could upload a sample of the native footage? You could use a free hosting site e.g. mediafire.com | ||||
| MikeZZZZ posted 2009 Oct 16 15:34 | ||||
| Here's a link to the original file: http://www.macpamedia.org/media/temp/20091012103932.m2ts (~56MB)
I'll take a look at that in vdub, love that program. "Intraframe warping" - never heard of that. It almost looks like a repeating pin-cushion effect. The best I could do in Vegas was to interpolate using the upper field first and render at 5fps. This got rid of most of the rippling, but the video was still very blurry. Yes, this was recorded in 1080i30(29.97fps). I did try turning off "blend" as that did make it worse. It almost looks like the autofocus stopped working and the OIS went crazy at the same time.
| ||||
| poisondeathray posted 2009 Oct 16 16:10 | ||||
| When you look at the individual fields in avisynth, the wave distortion is present in each field, and it's already blurry in each field (this is before deinterlacing or any processing)
You might be able to do a reverse displacement map manually in after effects, but this would be very very very difficult to do to get it lined up perfectly I doubt deshaker or related software will have any effect on this footage Others might have some better ideas, but I don't see how you can fix this | ||||
| zoobie posted 2009 Oct 16 16:50 | ||||
| Curious about the cam...did the manual focus also stop focusing on items in infinity? | ||||
| MikeZZZZ posted 2009 Oct 16 19:17 | ||||
Taking it down to 10fps and then 5fps seemed to have the most positive effect, getting rid of most of the shaking. The speaker had come in from out of town to pre-record this webcast for us. We'll have to do what we can with it. We might be able to shrink it down small enough that most of the blurriness is not too noticeable.
| ||||
| MikeZZZZ posted 2009 Oct 16 19:24 | ||||
| I was filming at a different location when this happened. The tech running the camera said that she tried to use the manual focus, but it seemed like it wasn't working at all. She did try turning the camera off and back on, but that didn't help. It mysteriously started working again later in the day. I'm afraid this means that we won't be able to rely on this camera for future projects. They go for about $500 on ebay, so we may just upgrade to a newer model instead of trying to repair this one.
I'm going to torture test the camera to see if I can reproduce the problem. I asked the tech, but she didn't think the camera was making any odd noises at the time. This camera was purchased new for $1500 2.5 years ago and has been treated very gently, so I'm a little disappointed that it's having problems already.
| ||||
| poisondeathray posted 2009 Oct 16 19:28 | ||||
What do you mean? Selecting every 3rd or 4th frame so it is a lower fps, or playing all the frames back slower so it plays at 5 or 10fps ? What do you do with the audio then? Either way, the distortion will be there in each frame or field (if left interlaced), so I don't see how that is going to help ? | ||||
| MikeZZZZ posted 2009 Oct 16 19:52 | ||||
| Selecting every 3rd frame and dumping the others. I did this in Vegas, just by rendering the video at a lower fps. I kept experimenting with different fps, 10 looked noticeably better, 5 looked even better with almost no shake. I figured that the shaking effect was happening at a predictable interval, so I could partially eliminate it by dropping the other frames. All of these were done with de-interlace interpolation set with upper field first, using Vegas terminology.
Here's a sample at 5fps, in uncompressed avi (~80MB): http://www.macpamedia.org/media/temp/test1-5-upper.avi
| ||||
| poisondeathray posted 2009 Oct 16 20:22 | ||||
| Did you upload the wrong clip? It still has combing artifacts?
Also do you care about audio? Or is this a mute clip? What is your end goal? web delivery ? dvd ? etc.. Interesting theory on the cadence thing though. Here is an example, where i used avisynth to bob-deinterlace to 60p and used selectevery(3,0) which is every 3rd frame, resulting in 19.98 fps. (I resized to clip to 720x400 just for demonstration purposes). It still looks like crap, but some of the motion warping is gone. I wonder if there is a mechanical reason for the underlying cause? selectevery%203,0.avi | ||||
| MikeZZZZ posted 2009 Oct 16 21:06 | ||||
| The artifacts pretty much go away when the video is resampled down to 522x296, which is the res we use for webcasts.
I had pulled the audio out of that clip so it would render more quickly. The final clip will have audio in it. The audio recorded fine. This will be webcast, eventually converted to flv for that purpose. That's pretty good, still a little motion. I'll take a look at avisynth too. That's kind of what I was thinking. It almost looks like the optical image stabilzation in the camera went crazy. That's why I asked the tech if the camera was making any unusual noises. I can't think of any "electronic" explanation. Sony support was no help. First I got the canned response you get if you have any problem recording with the camera. My reply back was less than polite (given that they didn't even read past the first sentence of my first message). Their second message suggested taking it in for service.
| ||||
| divebus posted 2009 Nov 13 01:18 | ||||
| I have the same problem shown in your video with my Sony HDR-SR7 when the camera warms up. It started two months out of warranty (of course). I've found similar complaints on this and related cameras (HDR-CX7). The problem is something wrong with the LD-228 and/or the VC-504 board which controls several lens functions including the Steadyshot.
Put your hand on the front of the lens housing and you can feel the optical block (shift lens) vibrating. Listen carefully to your audio - you can hear a little hum going on. That's the vibrating Steadyshot. Rotate the camera 90 degrees and return to level, the problem will temporarily subside in my camera. Turn off Steadyshot and the problem goes away until the camera heats up more, then it returns. There are entries in the service manual about how to deal with overheating shift lens errors. Mere humans can't do any repairs or adjustments. Sony says "replace the lens block" for $500. Is this ready for Class Action status? | ||||
| MikeZZZZ posted 2009 Nov 13 14:58 | ||||
| Thanks for the info, it's good to know what might cause it to start acting up again in the future. I also a have an HDR-SR8 (bought used off ebay) which hopefully will not start to exhibit this problem.
I can't believe this is such a common problem. Sony should man-up and cover this issue even if out of warranty. It's not like I've abused my camera or anything. It kind of sucks because the camera I purchased new, and have babied since I've owned it, is now malfunctioning. However, the camera I bought used from ebay is working fine, for now. Seems like Sony's reputation for quality products may be in question. Reminds of Seagate. They used to be the #1 harddrive manufacturer, now their failure rate is as high as any of the other manufacturers.
| ||||
| Knightmessenger posted 2009 Nov 15 20:45 | ||||
| So did the auto focus stop working for you too? That happened with the similar model HDR-SR11 camera I was using about a week ago. And the manual focus wouldn't work either for me, it's like the camera was still on auto. Do you have any idea what might have been happening? Did I read correctly that these Sony models lose their stability and focus because they can overheat?
I probably rambled a bit too much about the problems I experienced with the SR11 in this post: http://forum.videohelp.com/topic375574.html | ||||
| divebus posted 2009 Nov 15 21:49 | ||||
| Focus still works but the manual focus control has always been less than responsive. Just the Steadyshot is screwing up. My next step is to get out my can of Freez-Mist and start hitting components to find the culprit. Then... idunno. Probably figure out a heat sink arrangement. |
Login/Register to our forum to be able to post here.