大佬们，请问海思芯片的系统在上电重启之后，还能看到之前的系统日志么？有的时候解码程序在运行的时候突然卡死了，重新上电恢复正常，想查问题但是不太好复现，能不能把日志存下来呢？

在用3536的两个网卡进行数据的转发，eth1收链路的MAC帧，然后用eth0建立TCP连接，把收到的数据发出去，发现在不收eth1数据的时候，eth0的TCP收发速度正常，但是在接收eth1数据并转发的时候，eth0发TCP包的速度很慢，需要360ms才能发完一帧，导致了大量的丢数，有没有大佬能说一下是什么原因？

项目需要，要把输入的逐行视频转成隔行视频再编码，解码之后再转回逐行视频输出，3516A有这个功能么？该怎么做？我只找到了把输入隔行视频源转成逐行视频的功能。

项目需要，把3536的一路phy芯片去掉了，通过RGMII与FPGA通信，修改了内核里面的phy_device.c,在MDIO读取外部信息的时候直接改返回值，让它认为存在phy芯片，用的原始套接字收发数，现在传输的数据经常出错，有的时候丢数，有的时候多收到CRC校验，请问有什么解决办法么，或者说这么做正确么，不对的话，正确的修改方法是什么？谢谢各位大神~

求助各位大佬，用Hi3536做解码的时候，有两块板卡程序运行时会突然崩溃，然后打印信息出来 Unable to handle kernel paging request at virtual address 00282008 pgd = c0004000 [00282008] *pgd=00000000 Internal error: Oops: 805 [#1] SMP ARM Modules linked in: hi_rtc(O) hi_ir(O) hi3536_adec(PO) hi3536_aenc(PO) hi3536_ao(PO) hi3536_ai(PO) hi3536_aio(PO) acodec(PO) gpioi2c(O) hi3536_ive(PO) hi3536_vda(PO) hi3536_jpege(PO) hi3536_h264e(PO) hi3536_chnl(PO) hi3536_venc(PO) hi3536_rc(PO) hi3536_hdmi(O) hifb(PO) hi3536_vou(PO) hi3536_vpss(PO) hi3536_viu(PO) hi3536_vgs(PO) hi3536_region(PO) hi3536_tde(PO) hi3536_jpegd(O) hi3536_vfmw(PO) hi3536_vdec(PO) hi3536_sys(PO) hi3536_base(PO) hiuser(O) hi_media(O) mmz(O) stmmac CPU: 3 PID: 0 Comm: swapper/3 Tainted: P           O 3.10.0_hi3536 #13 task: cf85d400 ti: cf86a000 task.ti: cf86a000 PC is at rcu_bh_qs+0x18/0x24 LR is at __do_softirq+0x13c/0x204 pc : []    lr : []    psr: 60000113 sp : cf86bf08  ip : 00000000  fp : 00000100 r10: 00000004  r9 : 00000001  r8 : cf86a000 r7 : c06f0080  r6 : c06f0088  r5 : 00000008  r4 : 00000041 r3 : 00282000  r2 : 00282000  r1 : 00000001  r0 : 00000003 Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel Control: 10c5387d  Table: 4d4cc06a  DAC: 00000015 PC: 0xc007d928: d928  e3a03000 e18720f6 eafffff6 e308af00 e34ca072 e5da3013 e3530000 1affffee d948  e30203c8 e3a01f61 e34c0062 ebfe9af3 e3a03001 e18740d6 e5ca3013 eaffffe6 d968  c06eb930 e30d2fb0 e34c206f e30b3890 e34c306e e7921100 e3a02001 e0833001 d988  e5c32008 e12fff1e e30d2fb0 e34c206f e59f3010 e3a01001 e7922100 e0833002 d9a8  e5c31008 e12fff1e c06eb940 e92d41f0 e10f6000 f10c0080 e59f4078 ee1d5f90 d9c8  e18520d4 e0857004 e2522001 e2c33000 e3520000 e2d31000 e18520f4 ba000008 d9e8  e1921003 0a000001 e121f006 e8bd81f0 e1a00007 e3a01001 ebfffb4f e121f006 da08  e8bd81f0 e3088f00 e34c8072 e5d83014 e3530000 1afffff3 e3a01e1e e30203c8 LR: 0xc002baec: baec  e3a0e000 e59dc018 e78ce303 f1080080 e59f612c e3a05000 ea000003 e1b040a4 bb0c  e2855004 e2866004 0a000017 e3140001 e0870005 0afffff8 e1a09145 e59dc00c bb2c  ee1d2f90 e1a0a109 e598b004 e08a300c e2833004 e792e003 e28ee001 e782e003 bb4c  e5163004 e12fff33 e5983004 e15b0003 1a000026 e59d0010 e2855004 eb014788 bb6c  e1b040a4 e2866004 1affffe7 f10c0080 e5983014 e59dc018 e79c4303 e3540000 bb8c  0a00000d e59dc01c e59c3000 e59dc020 e06c3003 e3530000 aa000006 e5983000 bbac  e3130002 1a000003 e59dc014 e25cc001 e58dc014 1affffc8 ebfffeac e3a00c01 bbcc  ebfffe7d e59dc02c e3cc303f e59dc028 e593300c e20c1b02 e593200c e3c22b02 SP: 0xcf86be88: be88  0000005c 00989680 00000000 c096d1c0 00000000 c0728efb 00000001 c006220c bea8  c007d9a8 60000113 ffffffff cf86bef4 cf86a000 c0012b58 00000003 00000001 bec8  00282000 00282000 00000041 00000008 c06f0088 c06f0080 cf86a000 00000001 bee8  00000004 00000100 00000000 cf86bf08 c002bb6c c007d9a8 60000113 ffffffff bf08  0000006c c06f5280 c0728efb c06eb778 00000003 0000000a c072e900 c06f00c0 bf28  000025a3 c0703c24 00200040 cf86a008 cf86a000 cf86a020 0000006c 00000000 bf48  c0743780 fe402000 cf86a000 cf86a000 c06fdcf0 c002bf6c c06ebfd8 c0013ea0 bf68  fe40200c c06fe108 cf86bf98 c0008514 c00142a4 c00142a8 60000013 ffffffff R6: 0xc06f0008: 0008  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0028  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0048  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0068  00000000 00000000 00000000 00000000 00000000 00000000 c002b810 c00323d8 0088  c03f3ff8 c03f6100 c02b5204 c02b5718 c002b920 c0053e84 00000000 c007cd2c 00a8  00000000 00000000 00000000 00000000 00000000 00000000 000025c1 00000001 00c8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00e8  00000000 00000000 00000000 00000000 00000000 00000000 09660966 00000000 R7: 0xc06f0000: 0000  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0020  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0040  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0060  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0080  c002b810 c00323d8 c03f3ff8 c03f6100 c02b5204 c02b5718 c002b920 c0053e84 00a0  00000000 c007cd2c 00000000 00000000 00000000 00000000 00000000 00000000 00c0  000025c7 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00e0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 R8: 0xcf869f80: 9f80  00000002 ffffffff cf869fcc c0728ee5 cf868000 c0012bc0 c0965930 00000000 9fa0  00026f26 00000000 c0728ee5 c06fdd50 c052be6c cf868000 00000000 01400000 9fc0  c06eb930 c007d91c c0728ee5 c06fdd50 c052be6c cf868000 c0728ee5 cf868000 9fe0  00026f32 c005b360 00000000 c0729384 00000000 4051d764 ffffffff ffffffff a000  00000002 00000101 00000000 cf85d400 c0703ac4 00000003 00000015 c096eac0 a020  cf85d400 c06ecac0 cf86a038 cf9ea380 ce74e800 cf9ea380 cf86bfdc cf86bf38 a040  c05284b4 00000000 00000000 00000000 00000000 00000000 00000000 00000000 a060  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Process swapper/3 (pid: 0, stack limit = 0xcf86a238) Stack: (0xcf86bf08 to 0xcf86c000) bf00:                   0000006c c06f5280 c0728efb c06eb778 00000003 0000000a bf20: c072e900 c06f00c0 000025a3 c0703c24 00200040 cf86a008 cf86a000 cf86a020 bf40: 0000006c 00000000 c0743780 fe402000 cf86a000 cf86a000 c06fdcf0 c002bf6c bf60: c06ebfd8 c0013ea0 fe40200c c06fe108 cf86bf98 c0008514 c00142a4 c00142a8 bf80: 60000013 ffffffff cf86bfcc c0728ee5 cf86a000 c0012bc0 c096d930 00000000 bfa0: 00056c6c 00000000 c0728ee5 c06fdd50 c052be6c cf86a000 c0728ee5 cf86a000 bfc0: cf86a000 c06fdcf0 00000000 cf86bfe0 c00142a4 c00142a8 60000013 ffffffff bfe0: 00056c6c c005b360 00000000 c0729384 00000000 4051d764 ffffffff ffffffff [] (rcu_bh_qs+0x18/0x24) from [] (__do_softirq+0x13c/0x204) [] (__do_softirq+0x13c/0x204) from [] (irq_exit+0x9c/0xd0) [] (irq_exit+0x9c/0xd0) from [] (handle_IRQ+0x44/0x90) [] (handle_IRQ+0x44/0x90) from [] (gic_handle_irq+0x34/0x8c) [] (gic_handle_irq+0x34/0x8c) from [] (__irq_svc+0x40/0x50) Exception stack(0xcf86bf98 to 0xcf86bfe0) bf80:                                                       c096d930 00000000 bfa0: 00056c6c 00000000 c0728ee5 c06fdd50 c052be6c cf86a000 c0728ee5 cf86a000 bfc0: cf86a000 c06fdcf0 00000000 cf86bfe0 c00142a4 c00142a8 60000013 ffffffff [] (__irq_svc+0x40/0x50) from [] (arch_cpu_idle+0x2c/0x30) [] (arch_cpu_idle+0x2c/0x30) from [] (cpu_startup_entry+0xfc/0x140) [] (cpu_startup_entry+0xfc/0x140) from [<4051d764>] (0x4051d764) Code: e59f3010 e3a01001 e7922100 e0833002 (e5c31008) ---[ end trace 273035b391bc66f5 ]--- Kernel panic - not syncing: Fatal exception in interrupt CPU1: stopping CPU: 1 PID: 0 Comm: swapper/1 Tainted: P      D    O 3.10.0_hi3536 #13 [] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x10/0x14) [] (show_stack+0x10/0x14) from [] (handle_IPI+0x188/0x1b0) [] (handle_IPI+0x188/0x1b0) from [] (gic_handle_irq+0x88/0x8c) [] (gic_handle_irq+0x88/0x8c) from [] (__irq_svc+0x40/0x50) Exception stack(0xcf867f98 to 0xcf867fe0) 7f80:                                                       c095d930 00000000 7fa0: 000d4e92 00000000 c0728ee5 c06fdd50 c052be6c cf866000 c0728ee5 cf866000 7fc0: cf866000 c06fdcf0 00000000 cf867fe0 c00142a4 c00142a8 60000013 ffffffff [] (__irq_svc+0x40/0x50) from [] (arch_cpu_idle+0x2c/0x30) [] (arch_cpu_idle+0x2c/0x30) from [] (cpu_startup_entry+0xfc/0x140) [] (cpu_startup_entry+0xfc/0x140) from [<4051d764>] (0x4051d764) CPU0: stopping CPU: 0 PID: 0 Comm: swapper/0 Tainted: P      D    O 3.10.0_hi3536 #13 [] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x10/0x14) [] (show_stack+0x10/0x14) from [] (handle_IPI+0x188/0x1b0) [] (handle_IPI+0x188/0x1b0) from [] (gic_handle_irq+0x88/0x8c) [] (gic_handle_irq+0x88/0x8c) from [] (__irq_svc+0x40/0x50) Exception stack(0xc06eff68 to 0xc06effb0) ff60:                   c0955930 00000000 000c7b9a 00000000 c0728ee5 c06fdd50 ff80: c052be6c c06ee000 c0728ee5 c06ee000 c06ee000 c06fdcf0 00000000 c06effb0 ffa0: c00142a4 c00142a8 60000013 ffffffff [] (__irq_svc+0x40/0x50) from [] (arch_cpu_idle+0x2c/0x30) [] (arch_cpu_idle+0x2c/0x30) from [] (cpu_startup_entry+0xfc/0x140) [] (cpu_startup_entry+0xfc/0x140) from [] (start_kernel+0x30c/0x318) CPU2: stopping CPU: 2 PID: 0 Comm: swapper/2 Tainted: P      D    O 3.10.0_hi3536 #13 [] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x10/0x14) [] (show_stack+0x10/0x14) from [] (handle_IPI+0x188/0x1b0) [] (handle_IPI+0x188/0x1b0) from [] (gic_handle_irq+0x88/0x8c) [] (gic_handle_irq+0x88/0x8c) from [] (__irq_svc+0x40/0x50) Exception stack(0xcf869f98 to 0xcf869fe0) 9f80:                                                       c0965930 00000000 9fa0: 00026f7e 00000000 c0728ee5 c06fdd50 c052be6c cf868000 c0728ee5 cf868000 9fc0: cf868000 c06fdcf0 00000000 cf869fe0 c00142a4 c00142a8 60000013 ffffffff [] (__irq_svc+0x40/0x50) from [] (arch_cpu_idle+0x2c/0x30) [] (arch_cpu_idle+0x2c/0x30) from [] (cpu_startup_entry+0xfc/0x140) [] (cpu_startup_entry+0xfc/0x140) from [<4051d764>] (0x4051d764) 其他几块板卡都正常，只有这两块有这种现象，请问这是什么原因呢？

3516A芯片，启动脚本的参数设置了在线模式，编码程序运行后发现HI_MPI_VI_SetDevAttr会报错：0xa0108003，视频输入参数设置无效，但是在离线模式下程序运行没有错，想请各位指点一下什么地方需要修改，谢谢了！

输入BT656数据，应该是隔行视频，用3516A编码，发现图像动起来的时候 条纹非常明显，然后从VI通道里取了一帧图像发现已经有很厉害的条纹了，怀疑是不是VI把输入的顶场和底场简单的合在了一起送出来，请问各位这有什么解决办法么？

新手初来，先报个到，希望能在这里多学到些东西，以后也希望能有机会帮助到别人~

本帖最后由 qn1533785484 于 2019-8-2 11:25 编辑 采用的方案是SDI输入，VI-〉VPSS-〉VENC-〉VPSS-〉VO，3M的编码速率，30fps，链路以4Mbps速率发送，3536TCP接收，VDEC-〉VPSS-〉VO，HDMI输出到显示器。已知摄像头直接接显示器的延时在110ms左右，请问各位大神，整个系统的总延时最低大概能到多少？ 现在我们做出来的延时不低于380ms，某些细节多的场景延时会到400多甚至500ms。试过解码用PREVIEW模式，延时会降一些但是画面会有卡顿；编码的时候提高I帧的QP值，又会出现呼吸效应。规定了不能超过350ms，抓头发也抓不出来结果，求各位大神指点一下怎么办……

项目需要，3536的一路网口需要把外接的phy芯片去掉，通过RGMII与FPGA直接通信，恳求各位大佬指点一下，这个需要怎么做？内核需要怎么修改？

大家好，我遇到了一个问题，想请求一下帮助，我们有几个SDI的摄像头，其中一个摄像头的延时接到显示器上测出来延时比另外几个都低，但是接入链路后，端到端的延时反而比其他的摄像头更大。这个摄像头是3G-SDI的接口，其他几个有的是HD-SDI，有的是3G-SDI，我们用的视频分辨率是1080P30，采集芯片是GV7601转成了BT1120，16BIT。请问这种情况有没有谁也遇到过么？

大家好： 请问HI3536的VO如果要设置成BT1120，16bit和20bit模式分别该怎么设置呢?

用3516和3536分别做编码和解码，测出来1080P/30的视频，编码和解码两个过程加起来有170ms，是不是延时太大了？请问海思官方有编解码延时的测试报告么？