how to compress 93gb speech mp3 files to opus files 2017-05-30 07:29:27 Hi I am Rupesh from India. I have a huge directory of size 93.5 gb with 8500 mp3 files and 2000 sub directories.All these mp3s are speeches recorded by someone at 64 kbps. I want to compress these files recursively to opus using lame or another tool with 16 kbps bit rate and 11050 sample rate.I have compressed the above huge directory with above options using ffmpeg and the resulted destination directory size was 29.5 gb and the quality was not good. Then I thought instead of compressing to mp3 it is better to compress and convert to opus.I have compressed some mp3 files to opus recursively with foobar2000 and lamexp(a gui front end for lame) and the resulted opus files were satisfactory. The quality of opus file generated is much higher than mp3 file generated using same bitrate and same sample rate. The quality I mean there are less sounds like shhh garrrr and other electronic sounds.So I have decided to compress and convert all these mp3 speech files to opus. I have examined some tools like ffmpeg,lame,foobar. lamexp tool is taking much time to convert and foobar is taking very much less time to convert. I want to maintain high quality in resulted opus files I mean I want a tool which can take maximum time and produce good opus file.Can anyone of you suggest which is the best tool to convert and compress mp3 files recursively to opus. Please try to suggest 3 options I mean at 8kbps,16 kbps, 24 kbps with the corresponding sample rates which are perfectly suitable. Also suggest how to reduce noises if any in resulted opus files.I think that there is no player for opus files in android and if you know any please suggest the best one possibly which can play files in folder view.Regards,Rupesh.