Readonly_Readonly~effect/Optional Readonly~effect/Attach extra key/value metadata to this error.
Optional Readonly~effect/Suppress reports for this error.
Optional Readonly~effect/Override the severity level for this error.
Optional Readonly~effect/Optional Readonly~effect/OptionalcauseReadonlylogReadonlyreasonOptionalstack
The inputs cannot be mixed: the developer's video (a file the MP4 reader refuses — not an MP4, a fragmented MP4, no video track, no samples — or one whose sound the codec cannot decode: the build reads AAC, and PCM only as float32 little-endian) or the song file (the server's bytes) is unreadable, or FFmpeg did not finish in time. The bytes were supplied from outside — by the developer or the server — so the condition is typed: a caller can offer another file.
logis FFmpeg's log (its last lines), empty when the failure came before FFmpeg ran.Guide: Errors