Guy's,
i have been working with HikVision on the issues surrounding Firmware 5.4.0 / 5.4.1 for the IPC_R6, i have a Skype contact on the Support team, over the past month we have been working trying to find the issues surrounding bad image quality in the firmware, below is a list on what i have been working with them on, if you have any other issue you would like me to ask them, please add to the list.
this is what we have discovered:
1: bad pixelation, and pulsation effect, this is due I-Frames, as the I-Frame interval is less the grater the gap the more it degrades, so it looks worse when i-frame resets it, so having an 20 I-Frame Interval with Frame rate of 20, this 1 reference frame per second, so pulsation reset but be once per second so the degrade of pixels would be over a second, and thus 1 pulse per second, but, having an 40 I-Frame Interval with Frame rate of 20 this is 2 reference frame per second, so pulsation will reset but be twice per second so the degrade of pixels would be over a 1/2 second, and thus 2 pulse per second, but as the time allowed for degrade is halved the pulse effect looks less, but happen twice as often. And to reflect this did not happen is 5.3.8, nor does it happen in 5.4.0 firmware for the PTZ R7 cams.
2: in H264+ it is not very reliable, we have found that H264+ has issue with I-Frames where bits in the i-frame gets to big, so stops a live image showing in with WEB browser, Live on NVR, or Green screen in iVMS, to work around this bug, you can not use sharpness higher than 18, and try to keep bitrate no higher than 8Mbits (8Mbits / 4Mbits) when multiple cam are in h264+ mode, if some cams's do not show video image try reducing bitrate.
3: when H264+ mode is used, it is not as good at saving bandwidth as 5.3.8, as recorded files show, in 5.3.8 (with same bitrate settings) i used to get 2 - 2.5 hours per 1Gb file, now i only get aprrox 1Hr per 1Gb file
attached a sample of the pulsation effect i caught yesterday while it was raining and whilst i was working with HikVision over Skype, Hikvision has also earlier this month connected via team viewer to my mac, i connected the cam direct to mac (on separate lan, it was the only connected device), and he grabed the raw packets so they could be looked at.
as for the sample video of the pulsation, look at the houses opposite, and the neighbours house wall on the right, you will pixels degrading, and the when the i-frame is refreshed, it regained full quality and cycle begins again, HikVision has confirmed to me that this IS an issue and it should NOT be doing it, as i have proven with the PTZ cam in 5.4.0 as it is working perfect, sample also attached, you should see no pulsation, to play these file please use HikVision's player, VLC might also work.
I will keep you informed on what progress we make here.
i have been working with HikVision on the issues surrounding Firmware 5.4.0 / 5.4.1 for the IPC_R6, i have a Skype contact on the Support team, over the past month we have been working trying to find the issues surrounding bad image quality in the firmware, below is a list on what i have been working with them on, if you have any other issue you would like me to ask them, please add to the list.
this is what we have discovered:
1: bad pixelation, and pulsation effect, this is due I-Frames, as the I-Frame interval is less the grater the gap the more it degrades, so it looks worse when i-frame resets it, so having an 20 I-Frame Interval with Frame rate of 20, this 1 reference frame per second, so pulsation reset but be once per second so the degrade of pixels would be over a second, and thus 1 pulse per second, but, having an 40 I-Frame Interval with Frame rate of 20 this is 2 reference frame per second, so pulsation will reset but be twice per second so the degrade of pixels would be over a 1/2 second, and thus 2 pulse per second, but as the time allowed for degrade is halved the pulse effect looks less, but happen twice as often. And to reflect this did not happen is 5.3.8, nor does it happen in 5.4.0 firmware for the PTZ R7 cams.
2: in H264+ it is not very reliable, we have found that H264+ has issue with I-Frames where bits in the i-frame gets to big, so stops a live image showing in with WEB browser, Live on NVR, or Green screen in iVMS, to work around this bug, you can not use sharpness higher than 18, and try to keep bitrate no higher than 8Mbits (8Mbits / 4Mbits) when multiple cam are in h264+ mode, if some cams's do not show video image try reducing bitrate.
3: when H264+ mode is used, it is not as good at saving bandwidth as 5.3.8, as recorded files show, in 5.3.8 (with same bitrate settings) i used to get 2 - 2.5 hours per 1Gb file, now i only get aprrox 1Hr per 1Gb file
attached a sample of the pulsation effect i caught yesterday while it was raining and whilst i was working with HikVision over Skype, Hikvision has also earlier this month connected via team viewer to my mac, i connected the cam direct to mac (on separate lan, it was the only connected device), and he grabed the raw packets so they could be looked at.
as for the sample video of the pulsation, look at the houses opposite, and the neighbours house wall on the right, you will pixels degrading, and the when the i-frame is refreshed, it regained full quality and cycle begins again, HikVision has confirmed to me that this IS an issue and it should NOT be doing it, as i have proven with the PTZ cam in 5.4.0 as it is working perfect, sample also attached, you should see no pulsation, to play these file please use HikVision's player, VLC might also work.
I will keep you informed on what progress we make here.
