AVIF to HEVC Converter

Convert AVIF to HEVC: What This Tutorial Covers

This page turns an AVIF still image into a raw .hevc H.265 bitstream — your picture re-encoded as a bare H.265 elementary stream with no container around it. 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), and a raw .hevc file is meant for encoding pipelines, codec testing, or muxing into MP4/MKV later — it will not open in most ordinary players. 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 stream, or "Video per image" to get a separate stream 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 stream. No sign-up, no watermark.

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

The output is a constant-image stream, 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 stream 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 Black) 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 stream.
• 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 Raw Stream, Not a Normal Video File

A .hevc file is the bare output of an H.265 encoder — the compressed picture data and nothing else. Two consequences follow directly, and they are the reason most people who type "AVIF to HEVC" actually want a different page:

• There is no audio, and there cannot be. A raw video elementary stream carries one kind of data: video. A still image has no sound to begin with, and even if it did, there is no container here to hold a second track. The .hevc file is silent by design.
• Most players can't open it. Phones, smart TVs, QuickTime, and browsers expect a container (MP4, MKV, MOV) with timing and index information. A raw .hevc stream has none of that, so consumer players usually reject it. FFmpeg-based tools like VLC, and stream analyzers such as GPAC, can decode it — which is exactly why this output exists: for muxing and codec work, not casual playback.

If you want H.265 you can play, mux the stream into a container — for example ffmpeg -f hevc -i image.hevc -c copy image.mp4 — or skip the raw output entirely and use AVIF to MP4, which gives you a single, 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 raw .hevc stream of a still image has no audio track. There is nothing to recover; if you need a video with sound, add audio in an editor after muxing into MP4.
• "My phone / QuickTime / TV won't open the .hevc file" — These players need a container. Mux the stream into MP4 (ffmpeg -f hevc -i in.hevc -c copy out.mp4) or use AVIF to MP4 from the start.
• "VLC opens it but the duration or seeking is wrong" — Raw elementary streams carry no timing index, so players estimate timestamps. Muxing into a container with a proper index fixes seek and duration.
• "The picture is stretched or has black 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 raw .hevc stream only makes sense when a downstream tool specifically expects an H.265 elementary stream — a muxing step, a hardware-encoder test, or codec conformance work. For everything else it is the wrong target: it has no audio, no timing index, and won't play on consumer devices. 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.

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 raw .hevc elementary stream can only carry video, and a still image has no sound to begin with — so 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 a raw .hevc file?

FFmpeg-based players like VLC can usually decode a raw H.265 stream, and developer tools such as GPAC or an HEVC stream analyzer are built for it. Consumer players — phones, smart TVs, QuickTime, most browsers — generally cannot, because they expect a container with timing and index data. To play the result anywhere, mux it into MP4 with ffmpeg -f hevc -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 stream from an image instead of MP4?

Almost the only reason is a pipeline that specifically expects a raw H.265 elementary stream — feeding a muxer, testing how a hardware encoder handles a known frame, or codec conformance work. For anything you want to watch or share, choose AVIF to MP4: it gives you a single playable file with a proper container, where the raw stream gives you neither audio nor playback.

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.

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.