Analysis of SRT in Python

Desperate_housewives _-_ season_1 has only Chinese subtitles on iQiYi, which is a shortcoming for those who want to practice English listening. No suitable tools can be found online to display external subtitles. Just recently I was learning python, so I thought that it would be better to have a hand to do it.

Everything has to be done. My ideas are as follows:
1. Analyze SRT files;
2. extract time information and characters to be displayed. This is the most important part. The best way is to call the python regular expression to extract related information;
3. Call the pyosd display function, which is similar to the lyrics display function of the QQ music player;

For more information about SRT, see http://en.wikipedia.org/wiki/subrip. However, due to frequent access to external Subtitles at work, you also have a certain understanding of SRT.
The SubRip file format is "perhaps the most basic of all subtitle formats. "[10] SubRip files are named with the extension. SRT, and contain formatted plain text. the time format used is hours: Minutes: seconds, milliseconds. the decimal separator used is the comma, since the program was written in France. the line break used is often the CR + LF pair. subtitles are numbered sequentially, starting at 1.

Subtitle number // equivalent to index, marking the serial number of subtitle
Start Time --> end time // the start time and end time. The duration can be calculated accordingly.
Text of subtitle (one or more lines) // subtitle Information
Blank line [11] [10] // blank line

The following is the implementationCodeVery rough. I am still modifying it, but I have implemented some functions:

Import reimport pyosdimport sysimport getoptimport timeclass srtparsing (): Index = 0 # hour minute sec = 0 duration = 0 print time. time () def srtgetindex (self, line): Reg = Re. compile ('\ D') if (Reg. search (line): print line def srtgettimestamp (self, line): Reg = Re. compile ('\-\>') P = pyosd. OSD () if (Reg. search (line): print line time = line. split ('-->') # Start Time: hour_end = time [1]. split (':') minute_end = int (hour_end [1]) sec_end = hour_end [2]. split (',') hour_end = int (hour_end [0]) mis_end = int (sec_end [1]) sec_end = int (sec_end [0]) print "end --> H: % d M: % d S: % d, MIS: % d "% (hour_end, minute_end, sec_end, mis_end) # End Time: hour_start = time [0]. split (':') minute_start = int (hour_start [1]) sec_start = hour_start [2]. split (',') hour_start = int (hour_start [0]) mis_start = sec_start [1] sec_start = int (sec_start [0]) time_start = hour_start * 60*60 + minute_start * 60 + sec_start print "Start Time: % d "% time_start time_end = hour_end * 60*60 + minute_end * 60 + sec_end print" End Time: % d "% time_end duration = time_end-time_start print duration p. set_timeout (duration) def srtgetsubinfo (self, line): Reg = Re. compile (R' ^ [A-Za-Z] ') P = pyosd. OSD () p. set_pos (pyosd. pos_bot) p. set_colour ("yellow") p. set_align (1) # P. set_shadow_offset (10) p. set_vertical_offset (100) if (Reg. search (line): print line P. display (line) p. wait_until_no_display () If _ name _ = "_ main _": SRT = srtparsing () F = open ("/home/workspace/subtitle/src/DH. SRT ") for line in F: SRT. srtgettimestamp (line) SRT. srtgetsubinfo (line)

The next step is to control the time. You need to obtain the time from the system and compare it with the tag to precisely control the display.