There are so many many software around to convert or extract audio from video files.
But I need the one which DOES NOT convert at all, and just extract the exact same audio from video file WITHOUT quality loss!
Most of videos are in mp4 format, but I also have some vob and web video format as well?
I also have a question:
I bought the software from x265.org and it has Windows Media Player x64 included, if there a x64 version of Windows Media Player, where I can get its standalone installer for Win10 1803?
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you can use ffmpeg however as you not providing details about audio coding type then using container that recognize various audio coding methods seem to be most safe way to deal with your problem.
try something like:
ffmpeg -hide_banner -stats -i %1 -vn -dn -sn -c:a? copy -f matroska "%~n1_audio.mkv"
You can use ffmpeg in CLI mode but Audacity will do this and itr's a HELL of a lot easier.
I actually discovered this almost by accident ... or frustration? But if you open a video file in Audacity it will simply load the audio stream, or if there are more than one I'm guessing it'll ask to select the one you want. Never tried it with multi audio streams though.
After import, just go to file > export audio and pick the correct file type/extension and save. I've done this many times with music video. No conversion is done unless you want it, and if so it's an excellent converter/editor too.
MKVToolNix. It's quick and easy. Using Mediainfo., I compared the audio information for the video and audio files separately and they look 100% identical. Internet research says "lossless" format is what you want. "Lossy" loses a very small bit of information. My VOB (dvd source) had lossy compression and the extracted audio had lossy compression as well. I suspect if my DVD source would have been lossless, the extract audio would also have been lossless using MKVToolNix. I'm still new to this so wait for others to confirm my results.
Mediainfo (DVD Source, VOB File)
Audio ID : 189 (0xBD)-128 (0x80) Format : AC-3 Format/Info : Audio Coding 3 Muxing mode : DVD-Video Duration : 21 min 41 s Bit rate mode : Constant Bit rate : 192 kb/s Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 kHz Frame rate : 31.250 FPS (1536 SPF) Bit depth : 16 bits Compression mode : Lossy Stream size : 29.8 MiB (4%) Service kind : Complete Main
Mediainfo (extract audio)
Audio ID : 1 Format : AC-3 Format/Info : Audio Coding 3 Codec ID : A_AC3 Duration : 21 min 41 s Bit rate mode : Constant Bit rate : 192 kb/s Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 kHz Frame rate : 31.250 FPS (1536 SPF) Bit depth : 16 bits Compression mode : Lossy Stream size : 29.8 MiB (100%) Service kind : Complete Main Default : Yes Forced : No
DVDs always use lossy compression schemes (MPEG2, AC3, DTS, MP2). But copying that data isn't doing any additional loss.
Like if you rip an old-school Audio CD (PCM) on your PC to MP3 format you have some loss because MP3 is a lossy format. But if you copy that MP3 file from your PC to your MP3 player there is no extra loss - copying the file itself is a lossless process. It's the same with using mkvmerge on a VOB, it just copies the "lossy" data already inside the VOB without creating additional loss.