interpretting ripped CD text info
2019-12-03 19:14:52
Ripped a bunch of CDs back in 2014 using cdparanoia and some other tools I unfortunately don't recall. At time I made vorbis lossy encoding but I want opus now, for quality with smaller file size for my phone. I archived each CD rip as a single file along with a file called cdinfo.txt that I know was created with some tool at time of rip but I forget. Anyway would like to reprocess those archived rips into lossy, but like an idiot I did not take any notes on my previous process and don't remember. The cdinfo.txt file (among other things) has the following:Disc mode is listed as: CD-DA CD-ROM Track List (1 - 9) #: MSF LSN Type Green? Copy? Channels Premphasis? 1: 00:02:00 000000 audio false no 2 yes 2: 05:22:40 024040 audio false no 2 yes 3: 10:34:20 047420 audio false no 2 yes 4: 15:40:42 070392 audio false no 2 yes 5: 20:24:02 091652 audio false no 2 yes 6: 24:47:50 111425 audio false no 2 yes 7: 28:20:15 127365 audio false no 2 yes 8: 32:00:20 143870 audio false no 2 yes 9: 35:46:55 160855 audio false no 2 yes 170: 39:50:60 179160 leadout (401 MB raw, 401 MB formatted) Looking at the MSF value in #2 and the MSF value in #1 and taking the difference I get 5:20 which is the length of the first track. Can I assume that the MSF value then specifies the beginning of the track in the CD? e.g. first track starts 2 seconds in? Can I assume that the AA:BB:CC is Minutes:Seconds:SixtiethOfSeconds ?? What is the LSN ?? This rip is Tom Petty - Southern Accents. What I am doing with reprocessing is applying the deemph, then EBU R128 loudness normalize (via ffmpeg-normalize) - yes can use tags for that but a lot of players don't respect them. Then resample to 48/16 (ffmpeg-normalize leaves it at 192/16) via sox with dithering. Then split into individual wave files, then lossy encode. But I need to know how to interpret the MSF and maybe LSN to get sox to split correctly. I just didn't take notes on what those things mean, given that nothing in the : delimited fields are > 59 I assume they are scale of 60 but I have no idea what the LSN field is. Thank you to anyone familiar with this format.