[linux-dvb] Re: mplex and mpegtools 2gb limit

[Marcus Metzler <mocm@metzlerbros.de>]

Andy Coates writes:
 > > Both times when it reaches the end of the TS file, and looks 
 > > like it has
 > > completed vid and aud, it hangs.. in exactly the same way 
 > > dvb-mplex hangs
 > > with:
 > > # dvb-mplex -t MPEG2 -o test.mpg -i TS_STREAM 
 > > DVB-9-20021127-2059.36+2h10m.ts
 > > 
 > > 
 > > read(3, "", 1880)                       = 0
 > > read(3, "", 1880)                       = 0
 > > read(3, "", 1880)                       = 0
 > > 
 > > ... repeats for ever.. Why is it continuing to read from this 
 > > file.. the
 > > return value of 0 indicated EOF surely?
 > 
 > Looking at the code, dvb-mpegtools differs in that it uses save_read()
 > instead of read(), but the function has a slight flaw that won't let it
 > exit the read() loop:
 > 
 > ssize_t save_read(int fd, void *buf, size_t count)
 > {
 >         ssize_t neof = 1;
 >         size_t re = 0;
 > 
 >         while(neof >= 0 && re < count){
 >                 neof = read(fd, buf+re, count - re);
 >                 if (neof > 0) re += neof;
 >         }
 > 
 >         if (neof < 0 && re == 0) return neof;
 >         else return re;
 > }
 > 
Or you could just add a else break; to the if statement in the while
loop.
There is a new version of dvb-mpgtools with some other fixes available
since yesterday.

Marcus

-- 
/--------------------------------------------------------------------\
| Dr. Marcus O.C. Metzler        |                                   |
|--------------------------------|-----------------------------------|
| mocm@metzlerbros.de            | http://www.metzlerbros.de/        |
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