When a particular file (mp4, flv, etc.) has a 95 kbps audio bit rate, does it make sense to convert it to a higher bit rate when converting to mp3 or other format (lost or lost)?
Would this result in higher audio quality or just a larger file?
I’m not talking about a higher quality of output than an input: this is obviously not possible. (Apart from switching from a lossless format to the original waveform.) I want to know if an output with a higher bit rate than the input will have a better quality than it would.
Note that conversion between lost formats is not recommended. Only in some cases, an original CD / wave may not be available. The question is more or less about the utility of possibly increasing the bit rate during conversion.
maybe a sub question is helpful: does the answer depend on the type of output file (lossless or lost)?
The top two answers below seem to be different, namely the latter indicating that the bit rates are not directly comparable, and if the original sound is in a more efficient format, the (less efficient) audio output should have a somewhat higher bit rate (same idea here and here), but if mp3 is the least effective, I’m not sure which formats are more effective. (Is it aac?) (- And in general, the answers seem to fall into one of the two attitudes represented by the most reconciled responses).
Yes, it may make sense if you need to change the format.
If you have a 95 kbps file in a very efficient format to maintain the same quality, a relatively inefficient format like the mp3 format requires a higher bit rate.
Of course, you never recover anything that was lost in the first place. Conversely, MP3 encoding will further reduce the quality. Each lost format uses a different means to reduce the amount of stored data, eliminating “unnecessary” (unnecessary) portions of the data. Come and go through a bunch of different formats and there’s not much left …
Therefore, if you want to stay as close to the quality of your file as possible, choose a higher bit rate. Probably 320 kbps of space is wasted, but for mp3 format, a value between 128 and 192 is required to maintain, or at least get close to, the quality of a more efficient 95 kbps file.
Generally, this will usually not result in higher sound quality. The basic reason is that you cannot create sounds that are not in the original file.
Ideally, the only result that you suggest will be larger files.
At worst, the quality of the files may be even worse as the second lossy encoder tries to encode the output of a previous lossy encoder. It encodes noise and actual data.
Recording at a higher speed can have benefits if you have a lossless source and make it a lost output. This will minimize any loss of output lost.
If you can, it is much better to go back to the original source and re-code it at the highest bit rate you want.
By increasing the bit rate you will not get better sound quality.
Think of it this way: when it was converted from the original media (such as a CD), it was compressed to contain the “content” in a smaller “box”, thus losing a lot of data (read in loss-making and loss-free formats). If you then increase the speed, you simply expand the “box”, but the “content” is always the same.
