Any command to only keep the first 10 seconds of a MIDI file?

linustalman · 01-22-2022, 02:01 AM

Hi.

I've tried some editors. They're very confusing. Is there a terminal command to just keep the first 10 seconds of a .mid file and remove the rest?

Thanks.

wpeckham · 01-22-2022, 12:09 PM

Quote:

Originally Posted by linustalman

Hi.

I've tried some editors. They're very confusing. Is there a terminal command to just keep the first 10 seconds of a .mid file and remove the rest?

Thanks.

Not that I know about, at least not directly.
What editors have you tried? This should be somewhat simple for any decent editor as it is a pretty basic cut job.

Might use midicomp to gen a text file, trim it, then convert it back. I have not tried that.

shruggy · 01-22-2022, 12:41 PM

Debian meta-package multimedia-midi recommends/suggests a lot of tools that have something to do with MIDI. Perhaps, you'll find among them what you're looking for.

linustalman · 01-22-2022, 01:00 PM

Quote:

Originally Posted by wpeckham

Not that I know about, at least not directly.
What editors have you tried? This should be somewhat simple for any decent editor as it is a pretty basic cut job.

Might use midicomp to gen a text file, trim it, then convert it back. I have not tried that.

I've tried MuseScore2+3 & Rosegarden.

teckk · 01-22-2022, 02:34 PM

I don't have a .mid at the moment. I think that sox will convert mid to wav.

Code:

sox -t raw -r 44100 -e signed -b 16 -c 1 raw_audio audio.wav

Then you can slice and dice the wav however you wish with ffmpeg.

timidity will too.

Let me find one...
https://www.midiworld.com/download/3964

Code:

file rdeer.mid
rdeer.mid: Standard MIDI data (format 1) using 13 tracks at 1/120

Actually ffmpeg was able to read that ok.

Code:

ffmpeg -i rdeer.mid -vn -c:a libmp3lame rdeer.mp3

ffmpeg -i rdeer.mid -vn out.wav

file out.wav
out.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz

See:
man ffmpeg
man sox
man file

linustalman · 01-23-2022, 02:45 AM

Quote:

sox -t raw -r 44100 -e signed -b 16 -c 1 raw_audio audio.wav

It made a wav file but the playback was just noise.

ondoho · 01-23-2022, 03:32 AM

Midi isn't an audio format per se, it's a set of instruction you send to a synthesizer.
Cutting out 10s (while keeping it as a midi file) can prove to be tricky, because the instructions can include repetitions, or jumping back to a previous block etc.

linustalman · 01-23-2022, 06:20 AM

Quote:

Originally Posted by ondoho

Midi isn't an audio format per se, it's a set of instruction you send to a synthesizer.
Cutting out 10s (while keeping it as a midi file) can prove to be tricky, because the instructions can include repetitions, or jumping back to a previous block etc.

Thanks for the info. I may leave it be.

teckk · 01-23-2022, 06:39 AM

From post #5

Get a .mid

Code:

agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0"

curl -A "$agent" https://www.midiworld.com/download/3964 -o rd.mid

file rd.mid
rd.mid: Standard MIDI data (format 1) using 13 tracks at 1/120

Dump to PCM

Code:

ffmpeg -i rd.mid -vn rd.wav

file rd.wav
rd.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz

Get first 10 sec.

Code:

ffmpeg -i rd.wav -t 00:00:10 -vn -c:a copy rd2.wav

ffprobe rd2.wav
...
Duration: 00:00:10.01, bitrate: 1411 kb/s
  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s

10 different ways that you could do that.

Also saw these
https://github.com/gcunhase/wav2midi2wav
https://anyconv.com/wav-to-midi-converter/

linustalman · 01-24-2022, 09:23 AM

Hi teckk.

Code:

ffmpeg -i rd.mid -vn rd.wav

outputs

Code:

rd.mid: Invalid data found when processing input

teckk · 01-24-2022, 11:03 AM

What is the output of

Code:

file rd.mid

ffprobe rd.mid

Or it could be that you are using a ffmpeg with different compile options than what I am.

I have:

Code:

ffmpeg -codecs
...
 D.V.L. mv30                 MidiVid 3.0
 D.VIL. mvc1                 Silicon Graphics Motion Video Compressor 1
 D.VIL. mvc2                 Silicon Graphics Motion Video Compressor 2
 D.V.L. mvdv                 MidiVid VQ
 D.VIL. mvha                 MidiVid Archive Codec
 ...

Code:

ffmpeg
ffmpeg version n4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11.1.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3

linustalman · 01-24-2022, 11:26 AM

Code:

file rd.mid

Code:

rd.mid: Standard MIDI data (format 1) using 13 tracks at 1/120

Code:

ffprobe rd.mid

Code:

ffprobe version 4.3.3-0+deb11u1 Copyright (c) 2007-2021 the FFmpeg developers
  built with gcc 10 (Debian 10.2.1-6)
  configuration: --prefix=/usr --extra-version=0+deb11u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
rd.mid: Invalid data found when processing input

Code:

...
D.V.L. mv30                 MidiVid 3.0
D.VIL. mvc1                 Silicon Graphics Motion Video Compressor 1
D.VIL. mvc2                 Silicon Graphics Motion Video Compressor 2
D.V.L. mvdv                 MidiVid VQ
D.VIL. mvha                 MidiVid Archive Codec
...

teckk · 01-24-2022, 12:02 PM

Looks like the ffmpeg that you are using does not like .mid files.
You have timidity in your repos?

Looks like it's ancient, but so is midi.
http://timidity.sourceforge.net/
https://archlinux.org/packages/commu...64/timidity++/

https://www.instructables.com/Ubuntu-BASH-MIDI-to-WAV/
http://linux-sound.org/midi.html
https://www.fluidsynth.org/
http://www.tedfelix.com/linux/linux-midi.html
https://github.com/gcunhase/wav2midi2wav

Good luck, whatever you come up with.

linustalman · 01-25-2022, 08:36 AM

Thanks again, teckk. That's too much to deal with for my use case. Hopefully others will find it of use.