I have an upcoming project in PAL. I am looking for a stable setting for 720 50p but I can't find any consensus.

The above discussion is way over my head no matter how hard I try to understand it. I just want a stable setting where stability is priority over IQ. What would you suggest?

(I will be using SanDisk extreme class 10. And yes, I want to be able to playback the clip in camera)

Thx

>>>Try video buffers 30000000 for 720 modes, and 36000000 for 1080p2

Tomorrow I'll try. What progress has your testing 50p?

@Botvinic Also not sure about the muxers... what have you found by changing them?

@driftwood
Today my friend gave me other options. They can set the bitrate to 50 Mbps and GOP6 or GOP12. And everything seems to be working, but ... if you shoot trees, Stream Parser show jumps (Hard 1). How to fix it? Here is the configuration file, 40 Mbps, Gop12, AQ2.

I think it all depends on this part:

---
Video Bitrate 24H ADD = 50 million
Video buffer = 0x2800000
Video buffer 24p = 0x2800000
Quantizer for 1080 modes = 17
Quantizer for 720 modes = 17
Muxer buffer for 24p = 33,165,824
Muxer buffer for other modes = 19582912
1080p24 High Top Setting = 52 209
1080p24 High Bottom Setting = 40 846
1080p24 Low Top Setting = 38 589
1080p24 Low Bottom Setting = 34 900
Other Modes Top Setting = 49 900
Other Modes Bottom Setting = 39 100
---

but I do not understand this.

@Botvinic Im trying to reach stable GOP1 first, then go back to the other settings. :-)

@Ulisse Won't be here much soon. Got a huge filming job on- need these gh2s to perform... :-) Besides, I sleep with one eye shut ;-)

@AKED @Botvinic This is probably a false positive, but run this test very quickly for me and check it out. Read the instructions within the settings. ignore the 720p stuff for now and other settings. Test 1080 FSH and see what happens! Make sure you test at 50, 100, 125, 200 shutter, then do other shutter tests. Keep iso down low for now.
NOTE: this is nowhere near a final setting, Im much further down the line but just want you guys to check this earlier setting.
UPDATE: Now run another test and uncheck the encoder 720p settings. It appears its all about the video buffer being 3000000 :-)

I've tested many more, but I was not able set more than 34 Mbps. Below Gop24 (Gop12 worked only at 28 Mbps).

@driftwood
Please say your current settings, I'll test too:)

I know. Has that to do with the B-frames?
And thanks for your testing.
It is great that there are peopel like you, who know what they are doing when they test and then share their results with the group.
Thank you.

In the beginning, ther was much talk about the possibility of putting B-frames in the 720 mode.
As far as I remember it also worked.
Now in the last weeks there was nothing to read about tis.
Not important any more?

@Botvinic Attempting GOP1 at the moment on 720p50

I shot the video a little more, and 38 Mbps dies again =(((. I think leaving 34 Mbps. Someone has tested 38 and 36 Mbps?

I just get "wrighting limitations due to the memory card"............dam