[MPlayer-cygwin] Re: Seek in large files

[Frank Aurich]

Erik Lunchpail wrote:
> --- Frank Aurich <fa859178 at inf.tu-dresden.de> wrote:
> 
>> Vladimir Filippov wrote:
>>> I use MPlayer 1.0rc1 Windows from 
>>> http://www.mplayerhq.hu/design7/dload.html
>>> Then I am try to seek in video file with size about 4,3 GB MPlayer
>>> write message:
>>> Cannot seek in this file.
>>>
>>> But there is no problem to seek in this file by MPlayer 1.0pre7 in
>>> Linux. I try to open file from NTFS and UDF filesystems (in Windows
>>> and Linux). They normally support files of great volume.
>>>
>>> May be Windows version in mplayerhq.hu compiled without
>>> --enable-largefiles option? Or the reason in other?
>> I dug through the source code a bit and found something.
>> The problem seems to be in stream/stream_file.c, line 90 (or line
>> 153)
>> Here the size of the video file is determined.
>> Since len is of value off_t, it can only cover files up to 2GB in
>> size.
>> Anything larger results in an overflow and therefore negative size
>> values.
>> This is actually checked in line 162. If size ain't larger than 0,
>> then the seek 
>> property is not set.
>>
>> I replaced off_t with unsigned long, unfortunately  that did not
>> help.
>> I still can't seek in large files.
>> The length of the video is saved in a stream_t object, here as well
>> with a size 
>> of off_t.
>>
>>
>> Maybe the maintainer of the stream files could take a look at this?
>>
> 
> Gianluigi Tiesi has a patch against the mingw-runtime that will provide
> large files support.
> 
> http://oss.netfarm.it/mplayer/misc/file64_mingw.diff
> 
> Regards,
> Erik

Thanks Erik, I didn't know about this particular patch. Works like a charm!


Frank