To put it simply, the MKV and AVI formats only encapsulate containers, which encapsulate video streams and audio streams. The container does not affect the image quality. What affects the quality is what is encapsulated in the container. Therefore, changing the container does not affect definition subtitle audio.
I would like to add some basic knowledge about video. Maybe there is something wrong with it.
F
First, Introduction
The MPEG2 system is used for AV synchronization and time labels for system clock recovery in the 3 levels of es,pes and TS respectively.
On the TS layer, the TS header information contains the program Clock Reference PCR (Programme clock Reference),
It is used to recover the system timing clock STC, which is consistent with the encoder end.
In the PES layer, the PES header information contains a timestamp of PTS (Presentation time
Regular Expression of phone number (mobile phone number, 3-4 area code, 7-8 live video number, 1-4 extension code)
(\ D {11}) | ^ (\ d {7, 8}) | (\ d {4} | \ d {3})-(\ d {7, 8 }) | (\ d {4} | \ d {3})-(\ d {7, 8 }) -(\ d {4} | \ d {3} | \ d {2} | \ d {1}) | (\ d {7, 8 }) -(\ d {4} | \ d {3} | \ d {2} | \ d {1}) $)
Matching format:11-digit mobile phone number3-4-bit area code, 7-8 live
Use the MySQL function to determine the video extension code bitsCN.com
Delimiter |
Drop function if exists IS_MOBILE |
Create function IS_MOBILE (x VARCHAR (255) returns tinyint (1)
BEGIN
DECLARE result TINYINT (1) DEFAULT 0;
SET x = LCASE (x );
If right (x, 4) = '.mp4 'THEN
SET result = 1;
Elseif left (x, 9) = '[ctvideo]' THEN
SET result = 1;
End if;
RETURN result;
END;
Delimiter;
Not
Regular expressions matching telephone numbers in php (location, live video number, and extension number supported)
This article introduces a regular expression for matching telephone numbers in php. For more information, see.Example of a regular expression for phone number distribution:
[2, 3, 5, 6, 8, 9] only mobile phone numbers of these types are provided: 12 ..., 13 ..., 15 ..., 16 ..
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Show all public hangouts in Google +
Show hangouts in your circle
Quick one-click hangouts chat
View the video in album format (for example)
Hover your mouse over your avatar to see the number of Captive Students (as long as he is
Document and Video file format extension verification and image real verification help class, file format truth
Using System; using System. collections. generic; using System. linq; using System. text; using System. IO; namespace Reform. folderManage. cls {public class FileHelper {///
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