Movie time limit investigation

fudgey

1705
a570is

Re: Movie time limit investigation

« Reply #20 on: 01 / August / 2011, 15:09:28 »

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Great work! Time limits for video on some models have been bugging people for year (happily not me), so I do think this is a valuable feature. If you think there are thermal risks involved, maybe video length override should be combined with CCD temperature monitoring (do all cameras have that? I fear the ones that need this are often the ones with the cheapest hw...) and automated video shutdown by simulated shutter press upon crossing an upper threshold.

Or, just make it buildconf optional and disabled by default, with big warnings for those who want to risk it or only shoot videos outside during winter...

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funnel

349

Re: Movie time limit investigation

« Reply #21 on: 01 / August / 2011, 17:20:59 »

Quote from: philmoz on 01 / August / 2011, 09:44:07

Setting the normal video duration to 0xFFFFFFFF crashes the IXUS 310 when you stop recording (it also displays a warning icon when recording).

Same here, I did something wrong and the compiler didn't throw an error.

Now I tried other values and 0xFFFFF for 240,480p and 0xFFFF for 720,1080p appears to work.

Code: [Select]

"loc_FF2FB464:\n"
"	LDR	R0, [R6, #0xD8] \n"                  
"	LDR	R1, =0xFFFFF \n"                     //240p, 480p video limit 0xE0F
"	MOV	R0, R0, LSR #1 \n"                   
"	STR	R0, [R6, #0xDC] \n"                  
"	LDR	R0, [R10] \n"                        
"	STR	R0, [R6, #0xE4] \n"                  
"	LDRH	R0, [R10, #0x10] \n"                
"	STR	R0, [R6, #0xE8] \n"                  
"	LDR	R0, [R10, #4] \n"                    
"	STRH	R0, [R6, #2] \n"                    
"	LDR	R0, [R10, #8] \n"                    
"	STRH	R0, [R6, #4] \n"                    
"	LDR	R0, [R10, #0x14] \n"                 
"	STR	R0, [R6, #0xEC] \n"                  
"	STR	R8, [R6, #0x128] \n"                 
"	LDR	R0, [R6, #0xD0] \n"                  
"	CMP	R0, #0x140 \n"                       
"	MOVEQ	R0, #0x20000 \n"                   
"	MOVEQ	R5, #1 \n"                         
"	STREQ	R0, [R6, #0xAC] \n"                
"	BEQ	loc_FF2FB4F8 \n"                     
"	CMP	R0, #0x280 \n"                       
"	LDREQ	R0, =0x7A760 \n"                   
"	MOVEQ	R5, #2 \n"                         
"	STREQ	R0, [R6, #0xAC] \n"                
"	BEQ	loc_FF2FB4F8 \n"                     
"	CMP	R0, #0x500 \n"                       
"	LDREQ	R0, =0x11DA50 \n"                  
"	LDR	R1, =0xFFFF \n"                    //720p, 1080p video limit 0x707
"	MOVEQ	R5, #4 \n"                         
"	STREQ	R0, [R6, #0xAC] \n"                
"	BEQ	loc_FF2FB4F8 \n"                     
"	CMP	R0, #0x780 \n"                       
"	BNE	loc_FF2FB500 \n"
"	MOV	R0, #0x200000 \n"                    
"	MOV	R5, #5 \n"                           
"	STR	R0, [R6, #0xAC] \n"

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funnel

349

Re: Movie time limit investigation

« Reply #22 on: 02 / August / 2011, 08:25:04 »

I did a succesful test video recording at 240p, 1h 20m long. The ccd temp went from 40C to 54C after 1 hour, then I put a computer fan next to the camera and after 10 minutes the temperature went down to 45C.

Doing this tests I found a new bug in the camera(sx220). When I set the video quality override to low (1-30) the camera crashes randomly between 1-5 minutes of recording. At quality 50 works.

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