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| Identifying the bit rate https://mail.karaokescenemagazine.net/forums/viewtopic.php?f=1&t=22837 |
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| Author: | chrisavis [ Sat Dec 31, 2011 9:01 am ] |
| Post subject: | Identifying the bit rate |
So I paid a neighbor kid to help me with ripping down disks and I think he may have ripped a good chunk of the disks to very low bit rates. Is there any kind of tool that I can use to scan karaoke tracks that are enclosed in .ZIP files to determine the bit rate? I can spot check easily enough just using Windows Explorer but I would much rather scan everything in one fell swoop and get a report back. I would also rather do it without having to extract every single file. -Chris |
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| Author: | ed g [ Sat Dec 31, 2011 9:41 am ] |
| Post subject: | Re: Identifying the bit rate |
Look at the average size of the zip compared to the ones you ripped and it will probably give you a good idea. |
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| Author: | chrisavis [ Sat Dec 31, 2011 10:17 am ] |
| Post subject: | Re: Identifying the bit rate |
I am actually doing that right now. I performed a "dir *.* /s > c:\tracks.txt" and I am scanning the resulting text file. Laborious. -Chris |
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| Author: | exweedfarmer [ Sat Dec 31, 2011 10:58 am ] |
| Post subject: | Re: Identifying the bit rate |
If I remember correctly the bit rate is identified in the in the four most significant digits of the third byte of the frame header in an MP3 file. |
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| Author: | Rob Star [ Sat Dec 31, 2011 9:23 pm ] |
| Post subject: | Re: Identifying the bit rate |
The only way i know is analysing the frequency cut off ....128 Kbps mp3s have a cutoff frequency around 16 KHz, and 320 Kbps above 19 Khz. bit rate cut-off frequency compression 1411kbps >20kHz 1:1 320kbps 19.5kHz 1:4.4 192kbps 18kHz 1:7.3 160kbps 17kHz 1:8.8 128kbps 16kHz 1:11 96kbps 15kHz 1:14.7 64kbps 11kHz 1:22 32kbps 5kHz 1:44 |
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| Author: | chrisavis [ Sun Jan 01, 2012 11:50 am ] |
| Post subject: | Re: Identifying the bit rate |
On Windows Vista and later (I don't think XP does this) you can highlight and audio file and in the status bar on bottom it will display the bit rate. You may have to drag the status bar area up to expand out all of the info it has on the file. It does the same with video. All kinds of goodies displayed there. Oh.....does not work on .ZIP files though so you have to have the media file extracted out to get Windows to tell you. -Chris |
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| Author: | earthling12357 [ Sun Jan 01, 2012 12:51 pm ] |
| Post subject: | Re: Identifying the bit rate |
Open the folder with your music. In the search bar type .mp3 Click on veiw Click on choose details Check the box for bit rate Return to the results page and sort by bit rate. It should look into your zipped folders, but if it doesn't you can use an unzipping program first and then follow those steps to identify the status of your music. |
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| Author: | jerry12x [ Sun Jan 01, 2012 2:45 pm ] |
| Post subject: | Re: Identifying the bit rate |
chrisavis wrote: On Windows Vista and later (I don't think XP does this) you can highlight and audio file and in the status bar on bottom it will display the bit rate. Yes in XP if you mouse over it gives you bit rate for an mp3 but not if zipped. |
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| Author: | Rob Star [ Sun Jan 01, 2012 4:38 pm ] |
| Post subject: | Re: Identifying the bit rate |
sometimes people convert files so they maybe a 320 file but the content was originally 128 or whatever .....the frequency drop off is an identifier if anyone has messed with a file and has cheated. I had some sunfly files from sunfly legally downloaded and they sounded horrible even though they were 320 when i checked the frequency drop off they were 128 files |
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| Author: | chrisavis [ Sun Jan 01, 2012 4:42 pm ] |
| Post subject: | Re: Identifying the bit rate |
earthling12357 wrote: Open the folder with your music. In the search bar type .mp3 Click on veiw Click on choose details Check the box for bit rate Return to the results page and sort by bit rate. It should look into your zipped folders, but if it doesn't you can use an unzipping program first and then follow those steps to identify the status of your music. You have to modify the search index behaviour if your .ZIP files are in a non-indexed location. Regardless, the .ZIP files will show up in the results indicating they contain a media file, but the bit-rate does not get displayed for the .ZIP files. -Chris |
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| Author: | earthling12357 [ Sun Jan 01, 2012 5:41 pm ] |
| Post subject: | Re: Identifying the bit rate |
But for your purposes, you could do a batch unzip so you could identify the offending files, and then delete the unzipped files afterward. |
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