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#1
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Renaming changed format?
Can renaming a file change its format?
Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. |
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#2
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Renaming changed format?
masonc wrote:
Can renaming a file change its format? Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. I've renamed hundreds of mp3 files and never had that happen with true mp3 files. Sometimes the files are not mp3 though and the assigned player still plays them. Open one with Irfan and see if it says anything about incorrect format. |
#3
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Renaming changed format?
masonc wrote:
Can renaming a file change its format? Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. I suppose it depends on how "sophisticated" the player is. There are two ways to identify files. You can "trust" the file extension and then try and parse the 4CC codes in the file and play it. Or, you can ignore the file extension and "sniff" the file for characteristic identification strings. If I wanted a general purpose tool to offer opinions on files, I might try ffmpeg/ffprobe/ffplay package. While I could try the bash shell "file" command, it might not offer the level of detail that ffmpeg could. https://ffmpeg.zeranoe.com/builds/ Click the ugly buttons on the web page, to select: Release build 4.0 Windows 32 or Windows 64, as you see fit Linking: Static (no separate DLLs needed) Then click the blue Download Build button. If you had an older platform, you might try this one. https://ffmpeg.zeranoe.com/builds/wi...n32-static.zip When I tried a nightly build several months ago, it wasn't linked properly and the static build was internally missing some DLLs. The release build (4.0), one would hope it's tested well enough to run on your computer. Then, feed the program a file, and check the Command Prompt output text for details about what kind of file it is. If it really is a .mp3, put the .mp3 extension back on it. Then see if your player has an appetite. Paul |
#4
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Renaming changed format?
On Sat, 05 May 2018 14:59:59 -0700, masonc
wrote: Can renaming a file change its format? Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. These are mp3 "music" files (actually voice: stories) |
#5
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Renaming changed format?
In message , masonc
writes: On Sat, 05 May 2018 14:59:59 -0700, masonc wrote: Can renaming a file change its format? Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. These are mp3 "music" files (actually voice: stories) What is the nature of the renaming you're doing? If you're changing the extension on the file name (either to .mp3 _from_ something else, or from .mp3 _to_ something else), then I'm not surprised. If you're changing the part of the name before the dot, _some_ players may be fussy about (a) filenames longer than 8 characters (b) filenames with certain characters in them. To answer your first line: I've never experienced _any_ situation where changing the name of a file - whatever the nature of the change - alters its contents. However, it often (I'd say usually) alters what the device or OS handling them _expects_ to be the contents, if the change is to the extension at least. -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf To keep leaf vegetables clean and crisp, cook lightly, then plunge into iced water (the vegetables, that is). - manual for a Russell Hobbs electric steamer |
#6
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Renaming changed format?
On Sun, 6 May 2018 07:27:07 +0100, J. P. Gilliver (John) wrote:
In message , masonc writes: On Sat, 05 May 2018 14:59:59 -0700, masonc wrote: Can renaming a file change its format? Changing file names in Win7pro caused my mp3 player to reject them as "format not correct" Files transfer normally otherwise. Computer disks NTFC. Player is FAT32, internal and card. These are mp3 "music" files (actually voice: stories) What is the nature of the renaming you're doing? If you're changing the extension on the file name (either to .mp3 _from_ something else, or from .mp3 _to_ something else), then I'm not surprised. If you're changing the part of the name before the dot, _some_ players may be fussy about (a) filenames longer than 8 characters (b) filenames with certain characters in them. To answer your first line: I've never experienced _any_ situation where changing the name of a file - whatever the nature of the change - alters its contents. However, it often (I'd say usually) alters what the device or OS handling them _expects_ to be the contents, if the change is to the extension at least. I've changed a file's extension a few times out of curiosity - it came about due to a video not having an extension at all (I knew what it was, but not why the lack of extension). Not being sure of the correct extension, I gave it, IIRC, .mp4 and MPC played it. In the spirit of 'science' I gave it another 3 or 4 extensions and MPC just played it. Wouldn't play with no extension. -- Peter. The gods will stay away whilst religions hold sway |
#7
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Renaming changed format?
In message , PeterC
writes: On Sun, 6 May 2018 07:27:07 +0100, J. P. Gilliver (John) wrote: [] On Sat, 05 May 2018 14:59:59 -0700, masonc wrote: Can renaming a file change its format? [] To answer your first line: I've never experienced _any_ situation where changing the name of a file - whatever the nature of the change - alters its contents. However, it often (I'd say usually) alters what the device or OS handling them _expects_ to be the contents, if the change is to the extension at least. I've changed a file's extension a few times out of curiosity - it came about due to a video not having an extension at all (I knew what it was, but not why the lack of extension). As to why, I've encountered at least one thing to do with video files that had a tendency to omit the extension - I think it highlighted the whole name on saving, so if you entered a new name the extension was replaced (with nothing) too. I forget what it was/is - might have been a downloader. Not being sure of the correct extension, I gave it, IIRC, .mp4 and MPC played it. In the spirit of 'science' I gave it another 3 or 4 extensions and MPC just played it. Wouldn't play with no extension. Double-clicking from explorer definitely wouldn't, as Windows wouldn't know it had to go to MPC. In that spirit of "science", it might be interesting to drag and drop it onto MPC's icon, or within MPC do a file|open (with filetype set to ".* Any). If you drop an _image file with no, or the wrong, extension onto IrfanView, it will offer to correct it; IV now does play various video files too (sometimes with a few seconds' delay), so it might be worth seeing if it'll tell you what the type _should_ be. If not, there are things that will - one called g-spot comes to mind, though I can't remember if the name has the hyphen in it (and have fun googling for that!). -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf Experience is that marvelous thing that enables you to recognize a mistake when you make it again. -Franklin P. Jones |
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