The meaning and relationship of nal, slice and frame in H.NAL Nal_unit_type 1 (encoding strip for non-IDR images), 2 (coded stripe data split block a), 3 (coded stripe data split block B), 4 (coded stripe data block C), 5 (encoded stripe of IDR image) typesAndThree coding modes for slice species: I_slice, P_slice, B_sliceThere are 3 types of frame: what is the mapping between I-frame, P-frame, and B-frame?Finally, what frame does the 6 (SEI), 7 (SPS), 8 (PPS
groupsDatavg03Datavg02Datavg01Datavg00Rootvg2. perform the following operations on the volume group used for database preparation:# Lsvg? L datavg03Datavg09:Lv name type LPs PPs PVs LV STATE MOUNT POINTLvdata0316 raw 64 64 1 open/syncd N/Lvdata0317 raw 64 64 1 open/syncd N/Lvdata0318 raw 64 64 1 closed/syncd N/Lvdata0319 raw 64 64 1 closed/syncd N/Lvdata0320 raw 64 64 1 closed/syncd N/Lvdata0321 raw 64 64 1 closed/syncd N/Lvdata0322 raw 64 64 1 close
yet.This information is stored in the SPS (set of sequence parameters) and PPS (set of image parameters) of the H264 stream.For each NAL unit, the last 5 bits of the first byte after the starting code represent the type of the NAL unit. 7 represents sps,8 on behalf of PPS. Usually after the SPS and PPS is the IDR frame, without the information on the front frame
Base64 encoding is very common in e-mails. For emails such as Foxmail and outlook, the user agent performs SMTP verification when sending emails, that is, entering the username and password in base64 encoding format for verification, the body content and attachments of emails are generally transmitted using base64 encoding.
When using the Telnet tool to test mail sending, if verification is required, the practical base64 encoding tool becomes necessary. In another articleArticlePHP functions c
["au_id"]);//// Create a link for the two tables created above, specify the names of the Parent and Child columns, and name their relationships.
String connstring = ConfigurationManager. ConnectionStrings ["pubs"]. ConnectionString;SqlConnection con = new SqlConnection (connstring );
SqlDataAdapter sda = new SqlDataAdapter ("select * from authors", con );DataSet ds = new DataSet ();Sda. Fill (ds, "name ");
SqlDataAdapter sda2 = new SqlDataAdapter ("select * from titleauthor", con );Sda2.Fill (
Hardware environment: minicomputer IBM p670, storage: IBM shark F-20
Software environment: Operating System aix5.1 database Oracle9i
Theme: physical volume PV-> volume group VG-> logical Volume LV (type: Raw)-> Add tablespace
Procedure:
I. First, # lsvg-O // view all available volume groups
Datavg03
Datavg02
Datavg01
Datavg00
Rootvg
2. perform the following operations on the volume group used for database preparation:
# Lsvg-l datavg03
Datavg09:
LV name type lps
group, I only need to operate on it..
2. view the volume group information========================================================== ============================================
# Lsvg rootvgVolume group: rootvg identifier: 00098d9f00004c00000000f9b120700bVG state: Active pp size: 64 megabyte (s)VG permission: read/write total PPS: 542 (34688 megabytes)
Max LVS: 256 free PPS: 390 (24960 megabytes)
LVS: 9 u
available volume groups
Datavg03
Datavg02
Datavg01
Datavg00
Rootvg
2. perform the following operations on the volume group used for database preparation:
# Lsvg-l datavg03
Datavg09:
Lv name type LPs PPs PVs LV STATE MOUNT POINT
Lvdata0316 raw 64 64 1 open/syncd N/
Lvdata0317 raw 64 64 1 open/syncd N/
Lvdata0318 raw 64 64 1 closed/syncd N/
Lvdata0319 raw 64 64 1 closed/syncd N/
Lvdata0320 raw 64 64 1 closed/syncd N/
Lvdata0321 raw 64 64 1 closed/syncd
= "% d, % d/N ";Printf (PF, A, * a, a [0], A [0], A [0] [0]);Printf (PF, A + 1, * (a + 1), a [1], A [1], A [1] [0]);Printf (PF, A + 2, * (a + 2), a [2], A [2], A [2] [0]);Printf ("% d, % d/N", a [1] + 1, * (a + 1) + 1 );Printf ("% d, % d/N", * (a [1] + 1), * (a + 1) + 1 ));}
The following example describes how to use a string pointer as a function parameter. The content of a string must be copied to another string, and the strcpy function cannot be used. The form parameter of the function
1. pageddatesource paging efficiency is not high
Private void page_load (Object sender, system. eventargs E)
{
// Put user code to initialize the page here
If (! Ispostback)
{
Sqlpage ();
}
}
Void sqlpage ()
{
Sqlconnection myconnection = new sqlconnection (webuidemo. Code. Conn. connstr );
String SQL = "select linkname, lurl, limageurl from llinks where linkname is not null and limageurl is not null order by linkid DESC ";
Sqldataadapter SDA = new sqldataadapter (SQL, myconnection );
Dataset D
groupsDatavg03Datavg02Datavg01Datavg00Rootvg2. perform the following operations on the volume group used for database preparation:# Lsvg? L datavg03Datavg09:Lv name type LPs PPs PVs LV STATE MOUNT POINTLvdata0316 raw 64 64 1 open/syncd N/Lvdata0317 raw 64 64 1 open/syncd N/Lvdata0318 raw 64 64 1 closed/syncd N/Lvdata0319 raw 64 64 1 closed/syncd N/Lvdata0320 raw 64 64 1 closed/syncd N/Lvdata0321 raw 64 64 1 closed/syncd N/Lvdata0322 raw 64 64 1 close
is saved as several PPS projection files. It is best to put the external files inserted in these PPS files and PPS files in a folder for easy management. I first set up a link folder, the external file in which, and then inserted into these several PPS files, (avoid the show can not find the file), and finally put the
The original post link is as follows: http://blog.csdn.NET/ren65432/article/details/43449391
Sometimes we need to get h264 naked stream for analysis. This article describes how to obtain a h264 stream by FFmpeg. The H264 code stream files obtained can be played directly through the player such as VLC.
I. H264 file Data flow
The following figure is a. h264 file data analyzed through the Winhex tool:
FFmpeg get H264 ideas as follows:
1, write sync code, 4 bytes (00,00,00,01)
2, write SPS
3, wr
) (unsigned char *buf, int buf_size)) {int ret;
uint32_t now,last_update;
memset (metadata,0,sizeof (rtmpmetadata));
memset (m_pfilebuf,0,buffer_size);
if ((Ret=read_buffer (m_pfilebuf,m_nfilebufsize)) Read the SPS and PPS for the H264 file before you begin looping through the data. The SPS is a set of sequence parameters and the PPS is the set of image parameters. In the SPS sequence parameter set,
Using System;
Using System. Collections. Generic;
Using System. ComponentModel;
Using System. Data;
Using System. Drawing;
Using System. Text;
Using System. Windows. Forms;
Using ESRI. ArcGIS. DataSourcesGDB;
Using ESRI. ArcGIS. esriSystem;
Using ESRI. ArcGIS. Geodatabase;
Using ESRI. ArcGIS. Carto;
Using ESRI. ArcGIS. Geometry;
Using ESRI. ArcGIS. Display;
Namespace WindowsApplication1{Public partial class Form1: Form{Public Form1 (){InitializeComponent ();}
Private void button#click (object s
Pageddatasource PPS = new pageddatasource ();
Protected void page_load (Object sender, eventargs E){If (! Page. ispostback){Gvbind ();}}Private void gvbind (){// Obtain the data sourceSqlconnection con = new sqlconnection ("Server =.; database = pubs; uid = sa; Pwd = sa ");Sqldataadapter SDA = new sqldataadapter ("select * from jobs", con );Dataset DS = new dataset ();SDA. Fill (DS );// Assign a value to the data sourcePDS. datasource = Ds. Tables [0]
Generally, backup is required at the operating system level. One of the most common backup methods for an operating system is mirroring. In practice, generally, the volume group rootvg is used as an image. Check whether rootvg has been mirrored:
1) lsvg-o
2) lsvg-l rootvg
# Lsvg-l rootvgRootvg:Lv name type LPs PPs PVs LV STATE MOUNT POINTHd5 boot 1 2 2 closed/syncd N/Hd6 paging 16 32 2 open/syncd N/Hd8 jfs2log 1 2 2 open/syncd N/Hd4 jfs2 12 24 2 ope
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