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libgme / game-music-emu

Blargg's video game music emulation library, which allows audio applications to easily add playback support for the music of many classic video game consoles.
GNU Lesser General Public License v2.1
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Question about VGM (Master System) length and libgme built-in ffmpeg #45

Open Wohlstand opened 3 years ago

Wohlstand commented 3 years ago

Original report by Vinícius Pontin (Bitbucket: vpontin, GitHub: vpontin).

Hi!
I'm using the ffmpeg 4.3.1 build from gyan's website (which have libgme enabled) to convert Sonic 1 for Master System to m4a.

I run the following command to convert:

ffmpeg -i song.vgm output.m4a

Although the short tracks are converted with the proper time the songs from the stages/zones are converted to 3+ hours of length, instead of just loop one or two times and fade out or stick with a time limit like Chipamp plugin for Winamp does.

I kinda new using ffmpeg with libgme, can someone enlighten me about how to properly convert a vgm song to mp3/m4a with a reasonable length?

Wohlstand commented 3 years ago

Original comment by Leandro Nini (Bitbucket: [Leandro Nini](https://bitbucket.org/Leandro Nini), ).

For looping tunes the field gme_info_t.length is zero while the actual information is splitted into intro_length and loop_length, which ffmpeg does not handle yet.

This should be reported to the ffmpeg developers.

vico93 commented 11 months ago

Oh, that's sad. I dont even know how to get in contact with ffmpeg team to ask for it.

Wohlstand commented 11 months ago

FFMPEG team has many ways to contact them: https://ffmpeg.org/contact.html