AVAssetWriter: preview recorded .mp4 before calling `finishWriting`?

0
votes

I am using AVAssetWriter to record a video (with audio) form iOS camera. Everything works great.

I now want to allow the user to preview the video before saving, meaning, before calling finishWriting on the AVAssetWriter instance.

My original thought was to copy the current file the writer is writing to during recoding to a preview url, and then use another AVAssetWriter to finalize that file and then play it.

However, I am not sure how to properly initialize a second AVAssetWriter for preview purposes, so I can call finishWriting on it at the preview url...

Anyone knows how I could implement preview functionality to allow a user to preview the currently recorded mp4 before calling finishWriting?

1
iosswiftavfoundationavassetwriteravkit

1 Answers

-1
votes

Anyone knows how I could implement preview functionality to allow a user to preview the currently recorded mp4 before calling finishWriting?

You must call finishWriting in order to have a viewable mp4 file.

So call finishWriting, let the user preview the resulting file and then decide whether to delete it or keep it.