AVIF to HEVC Converter

Convert AVIF to HEVC: What This Tutorial Covers

This page turns an AVIF still image into a .hevc H.265 video file — your picture re-encoded as an H.265 stream inside a Matroska (MKV) container that simply carries an unusual extension. Two things follow from that and both matter before you start: the image is held as one motionless frame for a duration you set (there is no motion, and no audio because a still image has none to carry over), and the unusual extension plus Matroska packaging mean stock phone, TV, and browser apps often refuse the file — MKV-capable players such as VLC and mpv open it directly. If you actually want a shareable, playable video of your image, use AVIF to MP4 instead; if you only need a plain picture, use AVIF to JPG.

How to Convert AVIF to HEVC

1. Upload Your AVIF File: Drag and drop your .avif onto the page or click "+ Add Files". You can queue several images and they will share the same settings.
2. Choose Merge Strategy: Pick "Merge images" to combine every uploaded file into one .hevc video, or "Video per image" to get a separate file per picture.
3. Set Image Duration and Quality Preset: "Image Duration" controls how long the frame is held (default "5 seconds per frame"); the codec is fixed to H.265 for .hevc output, and "Quality Preset" (default "Very High") sets the encode quality.
4. Convert and Download: Click "Convert" and download the .hevc file. No sign-up, no watermark.

Walk-through: Getting a Usable .hevc File From a Still

The output is a constant-image video, so the settings that change the result are duration, quality, and resolution — not motion. A few patterns cover almost every real use:

• If you only need a single frame for a codec test: keep "Merge images" and lower "Image Duration" to a fraction of a second (the dropdown goes down to 1/60s, i.e. one frame at 60 fps). One repeated picture compresses efficiently, so the file stays small.
• If you want the still to match 1080p footage in an encoding pipeline: open "Video Resolution" and set a fixed 1920×1080, leaving "Keep aspect ratio" on so a non-16:9 image is letterboxed against the "Background Color" (default White) rather than stretched.
• If you are building a short sequence: upload the images in order and pick "Merge images" — each is shown for the chosen duration back to back in one .hevc video.
• For quality: "Quality Preset" defaults to "Very High", which keeps the still sharp. Because HEVC reaches similar quality to H.264 at a noticeably lower bitrate, there is rarely a reason to lower it for a single frame. If your AVIF is HDR or 10-bit, an H.265 Main 10 encode can carry that wider color depth, where an 8-bit codec would flatten it.

Read This First: .hevc Is a Matroska File With an Unusual Extension

The .hevc file this tool writes is a Matroska (MKV) container holding an H.265 video stream — a normal video file whose only quirk is the extension. Two consequences still matter, and they are the reason most people who type "AVIF to HEVC" actually want a different page:

• There is no audio. A still image has no sound to begin with, so there is nothing to carry over — the Matroska container itself could hold an audio track, but for image sources the tool hides the audio codec menu and writes a video-only file. The .hevc file is silent by design.
• Stock apps often won't open it. Phones, smart TVs, QuickTime, and browsers favor MP4/MOV; stock Apple apps do not play Matroska at all, and the unusual .hevc extension confuses software that judges files by name (renaming to .mkv helps). MKV-capable players — VLC, mpv, other FFmpeg-based tools, and analyzers such as GPAC — open it directly, with timing, duration, and seeking intact.

If a tool insists on MP4, a lossless remux is quick — for example ffmpeg -i image.hevc -c copy image.mp4 — but it is optional, not required for playback; or skip the unusual extension entirely and use AVIF to MP4, which gives you a single, widely playable file from the start.

AVIF Is an AV1 Image — HEVC Is a Different Codec

It is worth being precise about what this conversion does, because the two formats are easy to conflate. AVIF stores its pixels as an AV1 bitstream inside a HEIF container — AV1 is the royalty-free codec from the Alliance for Open Media. HEVC (H.265) is a separate, unrelated codec standardized by ITU-T and ISO/IEC. So this is not a container swap or a rewrap: the tool decodes the AV1-coded image and re-encodes the picture with H.265. AV1 and HEVC are competing codecs, and an .hevc stream contains no AV1 data once the conversion is done.

Common Errors and How to Fix Them

• "The file has no sound" — Expected. A still image has no audio to carry over, so the output from an image source is silent by design. There is nothing to recover; if you need a video with sound, add an audio track in a video editor afterward.
• "My phone / QuickTime / TV won't open the .hevc file" — Stock Apple apps don't play Matroska, and some software goes by the unfamiliar extension. Rename the file to .mkv, remux losslessly to MP4 (ffmpeg -i in.hevc -c copy out.mp4), or use AVIF to MP4 from the start.
• "The duration or seeking seems wrong" — It shouldn't be: the file is ordinary Matroska with normal timestamps, duration, and working seek. If a player misbehaves, it is usually keying off the unusual extension — rename to .mkv or remux to MP4 (-c copy) and it behaves.
• "The picture is stretched or has white bars" — That is the Background Color showing through after scaling. Keep "Keep aspect ratio" on for letterboxing, or pre-crop the AVIF to your target shape with the crop tool first.
• "H.265 isn't supported on the playback device" — Older hardware lacks HEVC decoding. For the widest compatibility, target an H.264 MP4 instead.

When This Doesn't Work

A .hevc target only makes sense when a downstream tool or workflow specifically asks for that extension — an H.265 encode test, or a pipeline that names it. For everything else it is an awkward target: the output from a still image is silent, stock Apple apps refuse its Matroska packaging, and the unusual extension trips software that judges files by name. If your real goal is a video you can share, upload, or hand to a person, skip this page and use AVIF to MP4; if you only need the picture in a widely supported still format, use AVIF to JPG. And a corrupted or partially-decoded AVIF can't be re-encoded — the converter needs a readable image to work from.

AVIF and HEVC Are Different Codecs

This conversion decodes the AVIF picture and re-encodes it with H.265 — the two are unrelated codecs, not a rewrap:

Settings That Change the Output

Frequently Asked Questions

Does the .hevc output have any motion or sound?

No. A single AVIF is one frame, so the stream shows that image held motionless for the duration you set, with no audio at all. A still image has no sound to begin with, so there is nothing to carry over — the Matroska container the tool writes could hold audio, but for image sources the audio menu is hidden and the output is silent by design. If you merge several images, you get cuts between frames but no movement within each.

What can actually play the .hevc file?

Anything that plays Matroska: VLC, mpv, and other FFmpeg-based players open it directly, with working duration and seek, and developer tools such as GPAC handle it too. Stock consumer apps — phones, smart TVs, QuickTime, most browsers — generally do not play Matroska, and some software balks at the unfamiliar extension; renaming the file to .mkv helps there. If a tool insists on MP4, remux losslessly with ffmpeg -i image.hevc -c copy image.mp4.

Isn't AVIF already compressed with AV1 — why re-encode to H.265?

Because AV1 and HEVC are different codecs. AVIF stores its picture as an AV1 bitstream inside a HEIF container, while .hevc is an H.265 stream. There is no way to rewrap AV1 data as H.265, so the tool decodes the AVIF image and re-encodes it with the H.265 encoder. You end up with a genuine HEVC stream that contains no AV1 data.

Why would I want a .hevc file from an image instead of MP4?

Almost the only reason is a workflow that specifically asks for the .hevc extension — an H.265 encode test, or a pipeline that names it. For anything you want to watch or share, choose AVIF to MP4: MP4/H.264 plays in stock phone, TV, and browser apps, where the Matroska-packaged .hevc file needs an MKV-capable player — and the output from a still is silent either way.

Is HEVC really about half the size of H.264, and does it keep HDR?

Roughly half at the same visual quality. HEVC (ITU-T H.265 / ISO/IEC 23008-2, published in 2013) was designed for about a 25-50% lower bitrate than H.264, with the savings growing at higher resolutions. It also defines a Main 10 profile with 10-bit depth, so if your AVIF is HDR or wide-gamut, an H.265 encode can preserve that color depth rather than flatten it. In our testing, a single 1080p AVIF held for five seconds at the default Very High quality produced a small H.265 stream of a few hundred kilobytes, since one repeated frame compresses efficiently.

Does the HEVC output preserve the HDR or 10-bit color in my AVIF?

It can. H.265 defines a Main 10 profile that carries 10-bit depth, so a wide-gamut or HDR AVIF can be encoded without being flattened to 8-bit. Keep the Quality Preset on "Very High" to hold the most detail in the single frame.

How long is each image shown, and can I combine several AVIFs?

"Image Duration" sets how long the still is held (default "5 seconds per frame", down to 1/60s for a single frame at 60 fps). Choose "Merge images" and upload your files in order to place them one after another in a single output; choose "Video per image" to get a separate output for each picture.

Are my uploaded files kept after conversion?

No. Your AVIF is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion. There is no sign-up, no watermark, and files are never shared or made public.