IgnorantGuru
commented
10 years ago I can't reproduce any problem with SpaceFM detecting changes to a file's mime type in general.
Your report is unclear - it sounds like you're talking about file types but you say "file extension". A file extension (.mp3) is part of the filename. It is never changed automatically by SpaceFM. It is only changed if the file is renamed, or deleted and recreated with a new name. A file type (eg "MP3 audio" audio/mpeg) is displayed in SpaceFM's Type column and in Info|Properties. It will generally change when the file content changes (although some rules for mime types are based on the filename extension, or both).
For example, if I create an empty file: touch xxx
xxx is identified as a plaintext type (no extension in this case). If I write mp3 data to the file: cat test.mp3 >> xxx
In SpaceFM, it now shows the file type as "MP3 audio" (mime type in Info|Properties shows audio/mpeg). So the change is detected. Same for changing an MP3 file to a FLAC file: cat test.flac > xxx
I did not test NTFS specifically, so you might want to run similar tests there. Note that if a file has .mp3 extension, it will always be identified as mime type MP3 (that's how freedesktop database does it - other programs may vary in identification, and your freedesktop database may vary).
I'm unlikely to install a 3rd party app to test something like this (very time consuming), so please try to provide generic steps to reproduce any problem, like the commands above. Also, you might add a screencast to this issue so I can see the before and after effect (or screenshots showing same), and others might reproduce it. Overall this report is unclear.
Originally reported by prodigalgvs in issue 388 (issues 386-388 and 390 were somehow lost - github support is being contacted):
The above only occurs under these circumstances, and not all the time.\r\n\r\nSituation:\r\n\r\n--Converting FLAC files to MP3 using Soundconverter 2.1.1\r\n--Soundconverter is set to create a folder named the same as the Artist - Album metadata. It is also set to move converted files to said folder as soon as each file is converted.\r\n--An existing instance of SpaceFM is open when the conversion process begins. This never occurs if an instance of SpaceFM is opened after the conversion process begins.\r\n\r\nWhat occasionally occurs in SpaceFM:\r\n--Folder is created based on the metadata mentioned above and the MP3 files are moved to it upon conversion as per normal. So good so far.\r\n--However ... File extensions are still named as FLAC files according to SpaceFM when in fact they are MP3 files. \r\n--Only restarting SpaceFM will bring about the correct file extension. Refreshing or starting a new copy does not fix it until all copies of SpaceFM are shut down and a new instance started.\r\n\r\nI know this sounds like it may be a Soundconverter related issue as well, but this never occurs in Thunar or PCmanFM. If I check the files in Thunar, or view the folder initially in Thunar, or have a copy of Thunar open when the conversion begins etc.. they are always displayed correctly as MP3. This only occurs in SpaceFM.\r\n\r\nThis occurs on a removable USB drive formatted to NTFS.