cables often get damaged during installation unfortunatelyUnfortunately, the known bad cables I have either don't supply any signal or the plug is damaged due to the user trying to use some kind of adapter that broke off in the plug (not sure why I haven't just tossed these). No cables with intermittent signal.
Well, thanks for checking! I have a funny feeling Jokiin is going to say my SD card is not so good...Unfortunately, the known bad cables I have either don't supply any signal or the plug is damaged due to the user trying to use some kind of adapter that broke off in the plug (not sure why I haven't just tossed these). No cables with intermittent signal.
Okay, attached are my results from Crystal Mark Disk...this is like playing poker and not knowing what the cards mean... I get poker hands, but not this.... Good or Bad???format the card before testing
Depends on the dashcam, but the A129 will happily work down to about 8 MB/s minimum write speed, below that it starts occasional beeping depending on the complexity of the scene (image), and below about 6 becomes regular beeping. Of course if you have a custom firmware with increased bitrate then you will need a faster card.Does anyone know what acceptable benchmark speeds are for Viofo's dash cams?
Attached my CrystalDiskMark Results. The sequential write is more than enough for 2x1080p video
Testing in the laptop is a good way to test the performance of the card itself.I just noticed the post about using the dashcam as a card reader, I didn't do that. I just used the SD card reader built into the laptop.
I think using the dashcam as the card reader is probably a better idea, as (presumably?) you are testing the write speed of both the card and the dashcam.
What firmware version are you using? Which power source/hardwire kit is used?Joe384 and I have been discussing this issue on the "Buffered Parking Mode" thread. TonyM suggested a new thread, so here it is...
The attached pic describes the situation: single beeps are heard once in a while during driving mode - The camera is cutting the videos short when this happens by 20-30 seconds. Weeks ago, members here speculated that it could be an SD card problem. But Joe and I checked our SD cards, and they are fine.
TonyM just suggested that it may be a rear camera connection issue: Either a damaged cable, which is somewhat unlikely since the cable is brand new from Viofo; or the cable is not firmly connected to front & rear cameras. I intend to check that my cables are firmly connected. I'll report back.
How about you? Have you every heard single beeps while driving and not knowing what your camera was telling you?
I may have an issue with the rear camera cable (at least). Just wiggling the cable gently gives me issues with the picture, I don't think this should happen especially since the cable is so thick!What firmware version are you using? Which power source/hardwire kit is used?
Troubleshoot that A129 Duo recording issue by disconnecting the Rear camera and see if issue continues. Suggest selecting a non-buffered Parking Mode such as Low Bitrate Recording or 5fps Time Lapse to confirm buffered Parking Mode cause.
Those odd sized clips and beeps can be caused by Parking Mode not switching to Normal Mode while driving ---or--- not selecting DEFAULT SETTINGS after every Firmware change ---or--- memory card write speed is to low ---or--- insufficient volts/amps due to other device/DVR drain.
Troubleshoot the memory card and power source by repeating the test with only one change ---- load official Viofo A129 Duo v1.90 Firmware and select Normal/Medium Bitrate (or disconnect REAR camera) then test again (lower Bitrate eliminates write speed errors on slower cards). Official VIOFO 64 + 128 GB microSD cards with superior MLC chips should work perfectly. I've never had a single issue with any locally purchased Samsung EVO Plus U3 write speed 64 or 128 GB cards and I record at extremely high Bitrates. (All new A129 Pro 4K owners MUST use high U3 write speed cards or forget about 4K resolution)
Very easy to test any microSD memory card isn't FAKE by simply recording / copying MP4 video files to fill more than 50% storage capacity, most FAKEs use 32GB cards.
Parking Auto Event Detection Mode does NOT work reliably using Power Bank.
Select Parking Low Bitrate Recording Mode if using Power Bank.
Problem with disconnecting the rear camera is that it will reduce the amount of data being written to the memory card, so a memory card issue may disappear as a result and you still won't know where the problem is, although if the beep does still happen then you have ruled out the rear camera as the cause.I may have an issue with the rear camera cable (at least). Just wiggling the cable gently gives me issues with the picture, I don't think this should happen especially since the cable is so thick!
I appreciate your advice with regard to changing one thing and then testing, the problem is however everything is so random it's almost impossible to troubleshoot. As mentioned in other thread after initially testing the card I had a few issues when I put the card back in, the dashcam then was faultless for about 10 days without me changing anything and then the single beep issue started. After testing the card for speed though, I am now having issues which might be the rear camera.
I will probably disconnect the rear camera now but for how long do I test before I can be sure it's the rear camera? I may go 10 days again without issue and I may return the rear camera only to have the dash cam start randomly beeping the next day...
You do realise that yours has a decimal point in the wrong place?
That is an order of magnitude of difference, not "very similar"!
Your test results showed 6.605 MB/s write, while joe's results showed 67.94 MB/s write for Seq Q32T1What do you mean "has a decimal in the wrong place?". Btw, I had asked nicely on this thread for an interpretation of my Crystal Mark Disk test results (above). Funny enough, Jokiin had time to "like" your post, but not reply to my question...lol
AND I asked "what is a good SD card speed benchmark" for the A129. - - Funny enough again, none of the experts here decided to reply. And one wonders why these threads go on an on sometimes! - - Besides, not wanting to make Viofo look bad and making up excuses for Viofo's "non-performance", they often do not answer legit questions, i.e. like when I first posted to this forum: No one took a moment to answer my question. Well, it will take more than ignoring me to get rid of me... especially when there are an army of guys here who feel exactly like me!
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