Open one video
Select a compatible video from Photos, Files, sharing, or a previous ClipFlow result.
Fade In / Out · iPhone + iPad
Start in black. End in black. Let the sound follow.
Enable a fade in, a fade out, or both, then set the duration of each effect in seconds. The original audio follows the same fades by default, with a switch to keep it playing at normal volume. ClipFlow checks the selected times against the span that contains visible video before creating the result.
Two independent edge fades
How to add a fade in or fade out to video on iPhone.
A fade in changes the opening from black to the normal picture. A fade out gradually takes the final picture to black.
Choose the edges
Turn on Fade In, Fade Out, or both. At least one effect must remain enabled.
Set the durations and sound
Each fade starts at 2 seconds when the visible span allows it; shorter videos use safe shorter defaults. Audio Fade In and Out is on by default, so the original soundtrack follows the enabled picture fades. Turn it off to keep normal volume. If the enabled total is too long, ClipFlow asks you to shorten it before export.
A clear opening, closing, or both
Fade In begins on a black frame and gradually reveals the normal picture during the selected opening duration. Fade Out keeps the picture normal until the selected closing duration, then darkens it progressively until the final frame is black.
The two effects are independent. Each enabled duration must be greater than zero, and the combined fade time must be strictly shorter than the span from the first visible video segment to the last. This leaves a normal-picture interval between the effects and lets ClipFlow show a specific duration warning instead of producing an ambiguous overlap, even when an audio track runs longer.
Match the soundtrack—or leave it alone
Audio Fade In and Out is enabled by default. Every available source audio track follows the same active opening and closing fade times as the picture. Turn the switch off when the soundtrack should start and finish at its original volume; the audio remains in the exported video either way.
Output and next steps
ClipFlow renders the fades into a new video on your device without changing its running time and leaves the original source unchanged. Available source audio is retained and fades with the picture by default, or stays at normal volume when the audio switch is off. Fade In / Out is included without ClipFlow Pro. The generated video can continue into compatible tools for trimming, filters, overlays, sound, captions, or conversion.