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Music from .MP4
In message , Reinhard
Skarbal writes: In article , le says... On Wed, 22 Mar 2017 09:46:08 -0700, WinUser wrote: I used Win 7 movie maker to extract a portion of a .MP4. Now I want to extract the music to a windows compatible music file. Then put on my cell phone. Can something on Windows 7 or XP do this ? If not, is there a free application to do this? ffmpeg Use with Avanti GUI, There is also xrecode II and newer xrecode III http://xrecode.com/xrecode3/#Download and TEncoder (using ffmpeg) http://tencoder.sourceforge.net/ Regards Reinhard I have these three (all free and these versions work under XP - websites may not be for versions I have): Free Video to Audio Converter version 2015 6.5.7 http://www.free-audio-editor.com/fre...oconverter.php AoA Audio Extractor Basic version 2.3.7 http://www.aoamedia.com/audioextractor.htm Pazera Free Audio Extractor 2.4 (32-bit) http://www.pazera-software.com/produ...dio-extractor/ (scroll down past the lists!) All seem to do the job well; I think all I got from links people have posted here (here being one of '7.general or 'xp.general). Goldwave can also load (the audio from) several video file formats, which of course it can then save in whatever format you want). What I find difficult to do (with all of them - though I _think_ they all _can_ do it - is to select the option to _not_ recode, but just extract the audio. They all _seem_ to want to recode it for you, which obviously takes longer and degrades (though usually not noticeably so) the audio. (It doesn't help, of course, when the original is e. g. coded as stereo but is in fact mono, or is coded at a much higher bit or sample rate than is justified by the actual content, presumably because it is thought [incorrectly in some cases!] to be insignificant compared to the video so may as well just shove it to maximum.) -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf Science isn't about being right every time, or even most of the time. It is about being more right over time and fixing what it got wrong. - Scott Adams, 2015-2-2 |
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Music from .MP4 [or any other video]
I'll repeat an older post I made, slightly more detailed.
MP4 (like most other video formats) is a container. It usually contains a video stream and an audio stream, but it might contain subtitle or other streams. To determine exactly what streams your .MP4 contains, you need a tool like Mediainfo Lite. http://mediaarea.net/en/MediaInfo/Download/Windows After it's installed, you can right click on the .MP4 and see what streams it contains. Scroll down to the audio one, and look at the format Here's an example: Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 3 min 45 s Bit rate mode : Variable Bit rate : 72.0 kb/s Maximum bit rate : 75.9 kb/s Channel(s) : 1 channel Channel positions : Front: C Sampling rate : 44.1 kHz Frame rate : 43.066 FPS (1024 spf) Compression mode : Lossy Stream size : 1.94 MiB (22%) The important bit is "Format". So to extract THIS audio WITHOUT re-encoding, I need to set the target to AAC ffmpeg -i input -c:a copy output.AAC (where input is the COMPLETE name of the .MP4, MKV, AVI, whatever, using double quotes if it has a space in the name) Example ffmpeg -i "My Favorite Music.MP4" -c:a copy "My Favorite Music.AAC" If Mediainfo showed a MP3, I'd use: ffmpeg -i "My Favorite Music.MP4" -c:a copy "My Favorite Music.MP3" The extraction is as fast as your HD can write. A few seconds for an hour of music, and there is NO distortion, as the stream is COPIED, not re-encoded. If you want to check the bitrate of the music after extraction, use this tool: http://spek.cc/ You will find most music from YouTube and other sites is ****-awful in quality. Usually 96.0 kb/s. You can see that with Mediainfo before extracting, of course, but Mediainfo gives you the nominal value, Spek does a full analysis. HTH []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#3
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Music from .MP4 [or any other video]
In message , Shadow
writes: I'll repeat an older post I made, slightly more detailed. MP4 (like most other video formats) is a container. It usually contains a video stream and an audio stream, but it might contain subtitle or other streams. To determine exactly what streams your .MP4 contains, you need a tool like Mediainfo Lite. http://mediaarea.net/en/MediaInfo/Download/Windows To determine the streams, yes; to do what the OP wanted (extract the audio), no. Although what you've explained/described is a good way to do it. But - given that the post was/is in Windows 'groups - I think the OP would probably prefer a GUI method. (Of which I've posted three, and others have others.) Granted, the three I use don't make it _obvious_ how to do an extraction without recoding, though I think they _can_. [] You will find most music from YouTube and other sites is ****-awful in quality. Usually 96.0 kb/s. You can see that with Mediainfo before extracting, of course, but Mediainfo gives you the nominal value, Spek does a full analysis. HTH []'s Depends what it is wanted for. For listening to on a variety of the portable devices around now, 96k probably can be acceptable for some material. -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf "...told me to connect with the electorate, and I did!" John Prescott on having punched the man who threw an egg at him (Top Gear, 2011-2-28) |
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Music from .MP4 [or any other video]
On Sun, 23 Apr 2017 16:42:56 -0300, pjp
wrote: In article , says... In message , Shadow writes: I'll repeat an older post I made, slightly more detailed. MP4 (like most other video formats) is a container. It usually contains a video stream and an audio stream, but it might contain subtitle or other streams. To determine exactly what streams your .MP4 contains, you need a tool like Mediainfo Lite. http://mediaarea.net/en/MediaInfo/Download/Windows To determine the streams, yes; to do what the OP wanted (extract the audio), no. Although what you've explained/described is a good way to do it. But - given that the post was/is in Windows 'groups - I think the OP would probably prefer a GUI method. (Of which I've posted three, and others have others.) Granted, the three I use don't make it _obvious_ how to do an extraction without recoding, though I think they _can_. [] You will find most music from YouTube and other sites is ****-awful in quality. Usually 96.0 kb/s. You can see that with Mediainfo before extracting, of course, but Mediainfo gives you the nominal value, Spek does a full analysis. HTH []'s Depends what it is wanted for. For listening to on a variety of the portable devices around now, 96k probably can be acceptable for some material. I believe Any Audio Converter will accept a mp4 file and spit out just the audio. Not that I've tried to do that but memory serves me right I once made the mistake of dropping a mp4 file into it rather than Any Video Converter and it started doing the conversion so ??? Well, I just extracted the sound from a 1 hour video. It took exactly 8 seconds, on my 10 year old PC. If Any Audio Converter takes the same time (or less, on a faster CPU) it's copying, more than that, it's converting. Conversion always implies loss of quality. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
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