MP4 Input Plugin (for Winamp2/5) 2.1 beta

Updated: 29 Sep 2004 | Freeware | 226KB | Downloads: 509530

This plugin decodes .MP4 and .M4A files as well as AAC, PS AAC and the newer HE ACC profile included in Nero 6.0 and can be considered a correctly working replacement for in_mp4 included with Winamp 5. It includes MP4 tagging.
How to install it:

- Uncompress in_mp4.dll from archive and copy it in Winamp \ Plugins directory.
- Always backup the existing file!

Important Notes:

- As from Winamp 5.12 and later, the default Nullsoft MPEG-4 Decoder (in_mp4) supports he-aac/nero digital mp4/m4a audio files, so there's no longer any need to use this plugin.

Note, the new in_mp4 still doesn't support mpeg4 video or proprietary Apple lossless audio (alac), though neither does the 3rd-party plugin. You'll still need to use the DirectShow Decoder for .mp4 video files; that's why you have to add ;MP4 to the Extension List in the DirectShow Decoder config (see the 2nd screenshot) by going to Preferences > Plug-ins > Input > double click "Nullsoft DirectShow Decoder...".

- FFDShow may need to be installed to decode MPEG4 audio and video formats. 3ivx might be required in some cases.

- WARNING: This will use the DirectShow filter for all MP4 files, therefore tags will not be read when adding MP4 audio files to the library and some audio formats in MP4 files might not function properly. You can circumvent this by renaming any .mp4 audio files with the .m4a extension, so that the Nullsoft in_mp4 decoder will be used for audio-only files. More info here.


MP4 Input Plugin (for Winamp2/5) 2.1 beta
on 09 December 2011, reviewed by: Cliff Davis


Not sure why Media Monkey stopped playing my MP4 files which had played previously, but this plug in fixed my problem after a month without access to my music files and failed attempts at fixes. Thank you Free Codecs!


MP4 Input Plugin (for Winamp2/5) 2.1 beta
on 14 September 2011, reviewed by: just me


brilliant little file, took 1 second to download then drag and drop to plugin folder.

when i deleted the disease that is itunes and transferred my files to mediamonkey I was finding that all the music that i had downloaded from torrents were in mp3 format n worked o.k but the music i had imported to itunes (disease) from my cd collection was in m4a format.

thanx a lot


MP4 Input Plugin (for Winamp2/5) 2.1 beta
on 22 August 2009, reviewed by: Yilmaz


People, use quick time player for mp4 files. It will open it no problem at all. Who wants to go through extra installations and extension changes. Until other players get their act together and include mp4 in their list, use quick time, save your self time and sanity. Just right click on the mp4 file and select "open with" choose "quick time".

Print MP4 Input Plugin

M4P input plugin (for Winamp2/5): allows you to associate M4P (iTunes MusicStore encrypted files) and M4B (protected Apple/Audible audiobooks) files with Winamp.

Haali Matroska Splitter: is a new DirectShow splitter, based on Haali's C library for Matroska (.mkv), .mp4, .ogg/.ogm and .avi handling.

MP4 Splitter: in order to play MP4 files, you must have MP4 Splitter installed.

mp4UI: is an easy-to-use software for opening, creating and modifying MP4 files.

Winamp iPod Plugin: (aka ml_ipod) allows you to manage your iPod from Winamp Media Library.

Orban AAC/aacPlus Player Plugin: is a free, full-featured software plug-in for Windows Media Player, capable of playing .aac, .mp4, .m4a, m4b, .3gp files.

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