$30CAD fake sj4000 - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: October 09, 2015, 10:48:43 am
content: http://www.ebay.com/itm/281816009094?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AITnot bad for the price i know my mums friends husband owns one he told me the video looks not too bad for such a cheap price i bought one a couple of days ago it was shipped the next day once it gets here ill be doing a review of it

author: adadad274
author_rank: Newbie
timestamp: October 09, 2015, 11:11:41 am
content: this link is being spammed via bots on an imageboard and forums so most likely not legit.Don't fall for it guys.

author: sony mavica
author_rank: Frequent Contributor
timestamp: October 09, 2015, 11:12:41 am
content: Quote from: adadad274 on October 09, 2015, 11:11:41 amwhat are you talking about?

author: adadad274
author_rank: Newbie
timestamp: October 09, 2015, 11:16:23 am
content: Yeah someone is framing you for no reason by spam advertising on a high traffic forum for you.https://8ch.net/b/res/4408836.htmlhttps://8ch.net/b/res/4408832.htmlhttps://8ch.net/b/res/4408831.htmlhttps://8ch.net/b/res/4408830.htmlhttps://8ch.net/b/res/4408829.htmlhttps://8ch.net/b/res/4408828.htmletc.

author: Rasz
author_rank: Super Contributor
timestamp: October 10, 2015, 04:34:31 pm
content: 12MP SJ4000 ....720P....lolits garbage, one of thesehttp://www.ebay.com/itm/Mini-808-Car-Key-Chain-Micro-Camera-HD-720P-H-264-Pocket-Camcorder-DX-/251997777204?hash=item3aac3ced34in different case

author: edy
author_rank: Super Contributor
timestamp: October 10, 2015, 06:55:43 pm
content: I'm not sure about the $30 Fake SJ4000, but the REAL one is pretty awesome and worth the price! I've been playing around with it for about 1 week since I got it....I bought a real SJCAM for $65 (which included a spare battery) when eBay listed it as a "special day deal" email. A few days later the listed again the SJCAM for $50! Oh well. I am not disappointed. Even at $65 it was a good deal for what it does. It is no GoPro but it is definitely worth the price-point for entry level hobby use and there are plenty of hacks that are available.For example, even though it doesn't support live video out while recording on the HDMI, you can modify a USB cable as it outputs composite signal on 2 of the USB wires while recording. So you can mount it to a Drone and rig up a "First Person View" (FPV) and have it beam the composite signal to your remote controller while it also records in full 1080p resolution for later playback (just google "SJ4000 USB FPV AV out cable" or something like that).I have only started playing with it, but here are some review videos I posted:UNBOXING:MENU SHOTS:This is for a real SJCAM 4000. I can't tell you whether the fake ones are going to have the same menus. Also, if you buy a fake one you better not ever update the firmware because you may brick it (unless you have a copy of the original firmware that you for sure know works to restore it back to the original).The SJCAM and it's variants work great if you can pair it up with a couple free video and image processing utilities such as FFMPEG and IRFANVIEW. I went out a did a bunch of tests and processed it before posting on YouTube:DASHCAM EXAMPLE:The video is sped up using "ffmpeg" command line option:ffmpeg -i input.mkv -filter:v "setpts=0.5*PTS" -an output.mkv(this speed up 2x - timelapse)Or you can speed it up by 4x like I did for my video using this:ffmpeg -i input.mkv -filter:v "setpts=0.25*PTS" -an output.mkv(this speed up 4x - timelapse)4K ULTRA-HD TIMELAPSE:The SJ4000 does not output 4K video. However, it will take up to 12 MP photos (resolution 4032 x 3024 which is 4:3 ratio) at 5, 10 and 20 second intervals for timelapse photography. You can take these images and use IrfanView batch processing to resize/crop/scale to a 4K video frame of 3840 x 2160 (16:9 ratio). Then you stitch the images together using ffmpeg command line:ffmpeg -f image2 -i r%04d.jpg -r 30 -c:v libx264 -tune stillimage -preset medium -crf 23 c:output.mp4In the above case the images are numbered r0001.jpg, r0002.jpg, r0003.jpg, etcetera. You will need to rename your images from the SJCAM to this sequence. They are not numbered like this automatically, SJCAM gives them a name based on the time, so you will need to sort them by date/time and make a batch file to rename them sequentially. I use EXCEL for this purpose. I make a list of files in order of time in column A, and a list of numbers 1, 2, 3.... etc... in columm B, and then column C is syntax of DOS rename command such as "ren <col A> <col B>". I then copy column C into a batch file and run it in the folder... it will rename all the images to sequential numbering of the above format so that ffmpeg works fine.NIGHT-TIME LOW LIGHT TEST:I tried a low-light test which is just a regular 1080p video sped up 4x.By the way, if you want to make regular 1080p timelapses (and not 4K VIDEO) which will save you space on the SD CARD and also avoid needing to use IrfanView to crop, just set the SJCAM photo resolution to 1080p. It will output properly sized 1920x1080 JPG frames. You still have to rename them sequentially for ffmpeg using EXCEL/Batch File trick I explained above, but then it combines it into a movie very easily and nicely.Here is a full 8+ hours timelapse I shot at 5 second intervals, combined into a 30 frames per second movie. That's more than 6000 photos (12 photos per minute x 60 minutes x 8 hours). It ended up being 3:38 length, which is 218 seconds x 30 fps = 6540 frames:8 HOUR TIMELAPSE 1080p:(EDIT - I added this summary)SUMMARY:In conclusion.... The REAL SJ4000 does output at 1080p 30fps. It will also do 720p at 30fps... although there is a menu option for 720p 60fps this is just frame-doubling... It doesn't actually capture at 60fps, it just duplicates the same frame twice. Therefore, you are better off just using 1080p 30fps more and if you want slow-motion just use ffmpeg to cut the rate down to 15fps or 10fps and see how it looks. It is not as smooth as a GoPro which captures for real at 60 fps, but you can still make a nice slow-motion action film if you don't slow it down too much to start noticing the choppiness.The fake SJ4000 I don't know.... They could top out at 720p and not offer anywhere close to the number of options I showed in the menu screens you see above. That is why people are tempted to "update" the firmware thinking they can add these extra features, and just end up bricking their device.As far as time-lapse goes, you can do lots of cool things.... As you can see, it can allow you to make 4K ULTRA-HD movies with a few tricks because it outputs 12 Megapixel photos. There is an auto-record CarMode feature which turns on automatically and begins recording when you turn on the car (and it receives power via the micro USB cable) and cycleMode which will over-write older files for continuous recording. So even just used as a Dashcam it is not a bad price. But it comes with the whole assortment of clips and waterproof casing and attachments for other ActionCam uses.

author: sony mavica
author_rank: Frequent Contributor
timestamp: October 11, 2015, 08:20:51 am
content: Quote from: edy on October 10, 2015, 06:55:43 pmcool videos