Is it possible to use a quality between AVAssetExportPresetMediumQuality and AVAssetExportPresetHighestQuality with AVAssetExportSession?

I am using AVAssetExportSession to export a video out of my iOS app, like this:

AVAssetExportSession *exportSession=[AVAssetExportSession exportSessio开发者_开发技巧nWithAsset:composition presetName:AVAssetExportPresetMediumQuality];

I want to upload the exported video, therefore size does matter. The problem is: The medium quality is a real bad quality and the AVAssetExportPresetHighestQuality is fine, but about 5 times larger than the medium one.

So, is there a way to create a video with a quality in between, lets say with 2 times the size?

Is this possible with AVAssetExportSession?

If not, is it possible with AVAssetWriter?

Thanks in advance,

best regards,

Walchy

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The answer is:

No. Not possible with AVAssetExportSession.

But yes. It is possible with AVAssetReader/AVAssetWriter.