[File] [PATCH] of Magdir/riff forTrID defs *.trd+ MIDI Stream *.mds+ extensions

[Christos Zoulas]

Committed, thanks!

christos

> On Jul 14, 2020, at 3:10 AM, Jörg Jenderek <joerg.jen.der.ek at gmx.net> wrote:
> 
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> Hello,
> some days ago i handled some RIFF based video files. When i run
> file command version 5.39 on more RIFF based samples i get a
> correct output like:
> 
> 8ball1.rmi:                          RIFF (little-endian) data,
> 				     MIDI
> AQUA.MMM:                            RIFF (little-endian) data,
> 				     multimedia movie
> BBALL.MMM:                           RIFF (little-endian) data,
> 				     multimedia movie
> dracula.4xm:                         RIFF (little-endian) data,
> 				     4X Movie file
> sample.dat:                          RIFF (little-endian) data,
> 				     wrapped MPEG-1 (CDXA)
> sample.mpg:                          RIFF (little-endian) data,
> 				     wrapped MPEG-1 (CDXA)
> Shakira - Hips Don't Lie.amv:        RIFF (little-endian) data,
> 				     AMV
> TABB4.MDS:                           RIFF (little-endian) data
> tada.wav:                            RIFF (little-endian) data,
> 				     WAVE audio, Microsoft PCM,
> 				     16 bit, stereo 44100 Hz
> test-noid3.mpr:                      RIFF (little-endian) data,
> 				     WAVE audio, MPEG Layer 3,
> 				     stereo 44100 Hz
> test.webp:                           RIFF (little-endian) data,
> 				     Web/P image
> TestRFIB.rdi:                        RIFF (little-endian) data,
> 				     device-independent bitmap
> TestRMP3.txt:                        RIFF (little-endian) data,
> 				     MPEG Layer 3 audio
> The Black Eyed Peas - Pump It.amv:   RIFF (little-endian) data,
> 				     AMV
> TimeGatep01s01n01a02_2.4xm:          RIFF (little-endian) data,
> 				     4X Movie file
> Toy-Story2_better-image-quality.4xa: RIFF (little-endian) data,
> 				     4X Movie file
> triddefs.trd:                        RIFF (little-endian) data
> Unison.SF2:                          RIFF (little-endian) data
> 				     SoundFont/Bank
> 
> All samples are at least general described by Magdir/riff with line
> 0	string		RIFF		RIFF (little-endian) data
> but with --extension option only ??? is displayed. Furthermore with
> - -i option for many samples only generic application/octet-stream is
> shown.
> 
> For comparison reason i run the file format identification utility
> TrID ( See https://mark0.net/soft-trid-e.html). This list the used
> file name extension and often with -v option the related URL
> pointing to used file format information.
> 
> So i add this information to Magdir/riff. For example AQUA.MMM with
> the RIFF Multimedia Movie File format i add at corresponding
> position a comment line like
> # URL:	http://fileformats.archiveteam.org/wiki/RIFF_Multimedia_Movie
> After the identifying line i now show file name extension by
> additional line like
> !:ext	mmm
> If no mime type is mentioned on corresponding website i add a
> meaningful user defined mime type. For the MMM-sample this
> information is shown by additional line like
> !:mime	video/x-mmm
> Then i repeat this procedure for all other inspected RIFF examples
> if information is available.
> 
> After applying the above mentioned modifications by patch
> file-5.39-riff-else.diff then for other riff samples with
> - --extension option now i get output like:
> 
> 8ball1.rmi:                          rmi
> AQUA.MMM:                            mmm
> BBALL.MMM:                           mmm
> dracula.4xm:                         4xm/4xa
> sample.dat:                          mpg/dat
> sample.mpg:                          mpg/dat
> Shakira - Hips Don't Lie.amv:        amv
> TABB4.MDS:                           mds
> tada.wav:                            wav/wave
> test-noid3.mpr:                      wav/wave
> test.webp:                           webp
> TestRFIB.rdi:                        rdi/dib
> TestRMP3.txt:                        ???
> The Black Eyed Peas - Pump It.amv:   amv
> TimeGatep01s01n01a02_2.4xm:          4xm/4xa
> Toy-Story2_better-image-quality.4xa: 4xm/4xa
> triddefs.trd:                        trd
> Unison.SF2:                          sf2
> 
> I hope my diff file can be applied in future version of
> file utility.
> 
> Unfortunately i found no information for RIFF wrapped MP3 with RMP3
> tag. I handled only 32 bit little endian files. Probably the
> observed information about file name extension and mime type also
> applies to big endian variants. For 64 bit files still no name
> extension and mime type is displayed.
> 
> With best wishes
> Jörg Jenderek
> - --
> Jörg Jenderek
> 
> 
> 
> 
> 
> 
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