Troubleshooting

iPhone videos often fail to play on Windows PCs — codec errors, audio-only playback, or portrait videos rotated sideways. Learn the three common causes (HEVC, hvc1/hev1 tagging, rotation metadata) and fix them in your browser or with one FFmpeg command.

iPhone and Android cameras embed GPS coordinates in every video. This guide shows you how to inspect what's actually in your file (exiftool, ffprobe, browser tools) and how to strip the location, timestamp, and camera info before posting to social — losslessly.

All the reasons your FFmpeg-converted video or audio plays silent — missing audio streams, -an, incompatible codecs, sample-rate and channel-count issues — with diagnostics and fixes for each.

Fix FFmpeg errors like 'Unknown encoder', 'Encoder not found', and 'codec not currently supported'. Covers build flags, alternative codecs, and licensing issues.

Fix H.265/HEVC encoding failures in FFmpeg. Covers alternatives when libx265 is unavailable, profile and level settings, the hvc1 tag for Apple Silicon, and explicit Main profile specification.

Fix FFmpeg's 'No such file or directory' error. Covers the four common causes — path spaces, relative paths, extension mismatches, and glob expansion — with quick commands and verification steps.

Fix 'SharedArrayBuffer is not defined' and 'Cannot use SharedArrayBuffer' errors when using ffmpeg.wasm. Covers COOP/COEP headers, coi-serviceworker, and configurations for common servers.

Fix common FFmpeg errors fast: Unknown encoder, moov atom not found, height not divisible by 2, Invalid data found when processing input, and more. Each error entry shows the exact message, root cause, and the fix command — searchable quick reference.