Tips for KMPlayer Doesn’t Play MP4, FLV, MKV Files Problems

As most players shouldn’t have problems with MP4 and H.264, KMPlayer should play both, as well as MKV, AVI, FLV, WMV and AVCHD. In order to fix ‘KMPlayer doesnt work’ problem, please take a closer look at the following help and 2 tips to help you out!

Why KMPlayer Doesn’t Play MP4, FLV, MKV Files

The problem that KMPlayer cannot play MP4, FLV or MKV files can be caused by several factors including the lack of MP4 codec pack, the settings on your computer, the problem of your YouTube downloader or the KMPlayer itself, etc, based on which solutions for how to solve “KMPlayer doesn’t play MP4” prob will be divided into two parts.

Part I – Fix “KMPlayer doesn’t play MP4/MKV/AVI” error by using KMPlayer alternatives

KMPlayer and VLC media player should have no trouble playing MP4, FLV, MKV videos. If your KMPlayer doesn’t play MP4 Video, probably it was not successfully installed. In this case, install the new version of KMPlayer to play MP4 videos again. Or go to Options -> Preferences -> Filter Control and check the Source Filters, Splitters, and Internal Video (and audio) Decoders. Well, there are also many other media players that can play MP4 video very well if your KMPlayer still can’t play MP4 after all those efforts, one of which available for free is 5KPlayer (for Windows/Mac).

5KPlayer supports all video audio codecs, including:

Supports popular formats MP4, H.264, M4V, WEBM, MPEG1/2, WMV/ASF, AVI, MOV, RM, OGV, FLV;

2. 1080P HD videos like M2TS, AVCHD, TP, MPEG-TS, EVO, MKV, AVC, MOD;
Besides, 5KPlayer is an all-in-one media player that can free download MP4/FLV/3GP/WebM videos songs from 300+ video sites, stream (MP4/MOV/M4V) videos music for AirPlay-supported devices, play regular and commercial DVDs, etc.

Part II – Convert MP4, FLV, MKV Files to KMPlayer Supported Video Formats

To solve and avoid “KMPlayer won’t play MKV, MP4 or other videos” issues, you can try the all-in-one Pavtube Video Converter Ultimate to convert videos to other formats supported by your player, like MP4, AVI, WMV, and more. Not only can it convert videos to solve KMPlayer not working problems, it can also convert videos to popular devices like iPhone, iPad, edit videos, download online videos from 300+ sites, make photo slideshow videos, etc. Below is a step-by-step tutorial on how to achieve the desired results using this software. Here is review.

Free Download and trail:


Other Download:

– Pavtube old official address:
– Cnet Download:

Note: This Top KMPlayer Video Converter will keep all your video files in good shape and make them more accessible by 5KPlayer, KMPlayer, VLC, Windows Media Player, MPlayer, QuickTime Player and any other pop multimedia players, as well as video editing tools, for example, convert MKV to MP4, AVI to WMV, H.265 to MP4, MTS to FLV, and MKV to iPhone, iPad etc. For Mac users, iMedia Converter for Mac is a helpful app to encode videos for further usage.

1. Load MKV, MP4, FLV Videos

Launch the Video to KMPlayer Converter; click “Add” and load your MKV, AVI, FLV, WMV Video files. Or directly drag and drip your Video/Movie source to the program.

2. Choose output format

Press the drop-down box named “Profile” and select a format you need for KMPlayer. There are several options that include MPEG-2, WMV, MPEG-4, MKV and many others each designed with their own encoding types.

3. Start Video to KMPlayer conversion

Hit “Convert” button to start downscaling and encoding MKV, AVI, FLV, WMV Video files for KMPlayer. After the conversion, tap the Open icon in the main interface and you can locate the converted files there. Just add the files to your KMPlayer, and you can play the converted Any videos on KMPlayer easily without any issues. Enjoy your Ultra HD life.

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