How to Convert HEVC to MP4 (H.265 Video)

How to convert HEVC to H.264 MP4

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   Understand what you're converting

   HEVC is a video codec, not a container. HEVC video is usually stored in MKV, MOV, or MP4 containers. When we say 'convert HEVC to MP4', we mean: re-encode the video from H.265 codec to H.264 codec, typically stored in an MP4 container. This is a full re-encode (unlike remuxing) — it takes time proportional to video length.

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   Check whether you need to convert

   If your phone, TV or editing app already plays the file, keep it: HEVC files are usually much smaller than H.264 at the same quality. Convert only for players, editors or websites that reject HEVC. Re-encoding takes time and loses a little quality.

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   Method 1: HandBrake (recommended for best quality)

   Open HandBrake (handbrake.fr, free). Open your HEVC source video. Under Output Settings, set Container to MP4. Under Video, set Video Codec to H.264. Set quality to RF 18-22 (lower number = higher quality). Under Audio, verify AAC is set. Click Start Encode. HandBrake produces an H.264 MP4 compatible with virtually every device.

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   Method 2: FFmpeg (fastest encoding control)

   ffmpeg -i input.hevc.mkv -c:v libx264 -crf 18 -preset slow -c:a aac output.mp4. The '-crf 18' is high quality (range 0-51, lower=better). '-preset slow' gives better compression. For faster encoding (less quality): use '-preset faster' and '-crf 23'. For hardware acceleration on NVIDIA: add '-c:v h264_nvenc' instead of libx264.

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   Method 3: VLC with transcode

   VLC → Media → Convert/Save (on a Mac: File → Convert / Stream) → add file → Convert/Save. Select 'Video - H.264 + MP3 (MP4)' as profile. Set output filename with .mp4 extension. Click Start. VLC transcodes HEVC to H.264 using its built-in encoder (x264).