Storyline: How Videos Are Encoded

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This article applies to:

Here's how Storyline encodes videos in your courses, based on their original file formats and the output options you choose when publishing.

Original File Format

HTML5 Output

Flash Output

Mobile Output

MP4

Re-encoded to MP4

Re-encoded to MP4

Re-encoded to MP4

FLV (no alpha channel)

Encoded to MP4

Encoded to MP4

Encoded to MP4

FLV (with alpha channel)

Encoded to MP4*

No change (FLV)

No change (FLV)

SWF

Not supported

No change (SWF)

Not supported

All other file types

Encoded to MP4

Encoded to MP4

Encoded to MP4

*Alpha channel transparency isn't supported in HTML5 output. As a result, FLV videos with alpha channels will be encoded as MP4 videos without transparency in HTML5 output.