Play H.265 Videos Free on Windows Using LAV Filters

Downloaded an H.265 file and got a black screen, or sound with no picture? The file is almost certainly fine - Windows just cannot read it, and LAV Filters is the free fix.

LAV Filters is a free, open-source set of DirectShow decoders, and adding it is usually a five-minute job.

HEVC, also written H.265, is what phones and 4K releases use because it halves the file size. Windows does not ship a decoder for it in every player, so the picture never arrives while the audio plays on regardless.

This guide fixes that in a DirectShow player, in about five minutes. Start with the check below, because a good number of readers do not need the install at all.

First: Do You Actually Need LAV Filters?

Open the file in the online HEVC player first. It runs in your browser and installs nothing.

If it plays there, the file is healthy and the problem is on your PC. If it fails there too, the download is damaged and no decoder will save it.

LAV Filters is the answer for DirectShow players and for older programs that use them: MPC-HC, MPC-BE, PotPlayer, Windows Media Player and a good deal of editing software. It replaces whatever ageing decoder is in there with a current one, and gives you control of the hardware acceleration those built-in decoders do not expose.

Step 1: Install LAV Filters

• If Haali Media Splitter is on the machine, uninstall it first. It overrides DirectShow filter priority and will make the LAV install look like it did nothing at all.
• Download LAV Filters and run the installer.
• Keep all three components ticked - LAV Splitter opens the container, LAV Video decodes the picture, LAV Audio decodes the sound. HEVC needs the first two, and unticking the third leaves you fixing the audio next.
• Close and reopen your media player. Filters registered while it is running will not be picked up until it restarts.

Step 2: Point LAV at Your GPU

Open LAV Video Configuration - type "LAV Video" into Windows Search, it installs alongside the filters. The first thing on the page is the Hardware Decoder dropdown.

Set it to D3D11, then check that HEVC is ticked in the codec list beside it. That list controls which formats get handed to the graphics card, and it is separate from the Formats tab, which only decides what LAV will decode in software.

The dropdown underneath, Hardware Device, is the one that catches people out. Leave it on "Automatic (Native)" only if you are using madVR or MPC Video Renderer; on any other renderer, pick your graphics card by name instead, which switches LAV to copy-back mode and works everywhere.

Step 3: Make the Player Prefer LAV

MPC-HC and PotPlayer both ship their own copy of LAV inside them, and they prefer it. Your new external install is ignored until you say otherwise, which is why "I installed it and nothing changed" is the most common outcome of Step 1.

In MPC-HC, go to View, then Options, then External Filters. Click Add Filter, add LAV Splitter Source, LAV Video Decoder and LAV Audio Decoder, and set each one to Prefer.

In PotPlayer, the equivalent is Preferences, then Filter Control, then Filter Priority, where you set LAV Video as the preferred decoder. Windows Media Player and older DirectShow apps need none of this - they have no built-in decoders to compete.

Check It Worked

Play an HEVC file, then open LAV Video Configuration again and click the Status tab. Active Decoder should read D3D11, not avcodec - avcodec means it is decoding in software.

In MPC-HC you can also right-click during playback, open the Filters menu, and confirm LAV Video Decoder is in the chain rather than the internal one.

If It Still Will Not Play

Black screen, audio fine. Another decoder is winning the filter chain. Set LAV Video Decoder to Prefer as in Step 3, and remove or block old decoders such as ffdshow, which is the usual culprit on machines that have had a codec pack on them before.

Stutters on 4K. Check the Status tab first - if it says avcodec, the hardware path is not engaged, so revisit the Hardware Device dropdown. If it says D3D11 and it still stutters, the file is likely 10-bit on a GPU that cannot hardware-decode it.

Picture but no sound. Open LAV Audio Configuration and confirm the file's audio format is enabled - AAC and AC3 cover most HEVC files. If you play through an AV receiver, the LAV setup guide covers bitstreaming properly.

File opens then closes immediately. The container is not being handled. Make sure LAV Splitter Source is added and set to Prefer for that file type, MKV and MP4 especially.

Anything not covered here is in the full HEVC troubleshooting guide, which works through the causes in order.

Quick questions

Install it, set D3D11, tell your player to prefer it - and the file that showed you a black screen this morning plays like any other.

Download LAV Filters and see whether it clears up your file. If it does, tell us which player you were in - it helps the next person.