Re: [Freecycle-users] Corrupt midi output file

[Marco]

Hi Predrag,

Thanks for that. I have a workaround for the moment, but it's not great.

I checked out some midi file format info on:
http://www.skytopia.com/project/articles/midi.html

I made two binary files header.mid and footer.mid:

header.mid: "4d 54 68 64 00 00 00 06 00 00 00 01 20 00"
footer.mid: "00 ff 2f 00"

than I run "cat header.mid export.mid footer.mid > midifile.mid"

After that I open the new file and add 4 to byte 22 (the 4 bytes from the
footer). Now I can read the midi file.

I'm still struggeling with the tempo, I hope to get that right maybe with
info from your C code.

Regards, Marco

> Hi Marco,
>
> Sorry for not responding earlier.
>
> I recall having problems with opening of midi files in newer versions of
> MuSE,
> Rosegarden etc.  This was, if I remember well, related to differences
> between
> different revisions of the SMF standard. I'll look at your comments about
> MThd and add it when I find some spare time.
>
> If you have some programming knowledge you could look at:
>
> http://cvs.savannah.gnu.org/viewvc/freecycle/src/midimanager.cpp?revision=1.4&root=freecycle&view=markup&pathrev=MAINTENANCE_0_6_ALPHA
>
> Dont checkout the last revision but use MAINTENANCE_0_6_ALPHA cvs tag.
>
> Regards,
> Predrag
>
>
>
> Le Wednesday 03 June 2009 10.33:44 Marco, vous avez écrit :
>> Hi All,
>>
>> I wanted to check out Freecycle, so I installed OpenSuse 10.3 on my
>> laptop
>> (I had dificulties on Fedora and Debian). I wanted to built Feecycle
>> from
>> source, since there was quite some info about it in the mailing list.
>> But
>> I found a Freecycle package in the Packman repository, and installed
>> that
>> one.
>>
>> Everything works fine, -thanks for a great program!- except the export
>> to
>> midi functionality.
>>
>> The midi file is saved, but when I load it in Rosegarden it complains
>> about a bad midi file. The Muse sequencer gives the following error:
>> 'Failed. Bad midi file: MThd expected'.
>>
>> I checked the midi file format standard, and indeed a file should start
>> with 'MThd'. When I open the file in GHex I see that the file starts
>> with
>> 'MTrk'. Before I start trying to modify the midi file with the HEX
>> editor
>> (and learn about the MIDI syntax along the way), is there anyone who had
>> this problem before, and found a solution?
>>
>> Alternatively, If I built from source, which package is particulary
>> important for the export of midi files?
>>
>> Thanks, Marco
>>
>>
>>
>>
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>