Forum Discussion
Compressed video in storyline is 3X larger in SCORM zip
Hi,
I'm noticing an interesting issue with videos that are embedded directly into storyline. This came up when I compressed 2 videos that were a combined 200MB down to 20MB, but the resulting zip file was only 10MB smaller. When I checked Storyline's View menu->Media Library, the video sizes are correct, but I think what's happening is that they seem to go through another round of compression that ends up creating large file sizes. I know if you check Storyline's video settings, there's an option for Compression. But the ability to turn it off is greyed out and otherwise seems to be set to Automatic.
Anyone have a fix for this?
Thanks,
Jae
2 Replies
If you publish with Adaptive video quality, Storyline publishes multiple versions of the video at different sizes, typically high, medium, and low quality plus streaming segments and playlist files. The published package may therefore contain several encoded copies of the same video. The size shown in View > Media Library represents the imported project asset. It does not necessarily represent the total size of all versions Storyline generates during publishing. Have you tried switching the publish quality to Static?
But the ability to turn it off is greyed out and otherwise seems to be set to Automatic.
This can happen when the video has been modified inside Storyline’s built-in video editor for example, cropped, trimmed, or otherwise adjusted. Once Storyline processes the file internally, the Compression: None option may no longer be available.
Another possible cause is an unsupported H.264 profile. For example, if the video was compressed in HandBrake, reopen the encoded file in HandBrake and check the Video tab. This should show the video encoder, codec profile, and related encoding settings.
Storyline generally supports standard H264 profiles such as bbaseline, main, and high for pass-through publishing. If the file uses a less common profile, such as high 444, high422, or another profile, Storyline may be unable to use the original stream without re-encoding it. In that case, the Compression setting remains locked to Automatic or appears greyed out. Example of unsupportet format and the Compression option disabled or greyed out.
You can download the MediaInfo app and open the videos in question to view more detailed information about their codec, profile, bit depth, frame rate, and other encoding properties. Alternatively, upload the videos here, and I can check the encoding details for you.Hi Nedim,
First, thank you. This is very help and kind of you.
To answer your questions, I do have Static turned on. I didn't know about the multiple versions, which makes sense, but I was also noticing a lot of audio encryption which is why it's set to static.
I built my own little compression tool that uses FFMPEG because I wasn't all that happy with Handbrake, which is using the same tool.
But if you're not experiencing this tripling of the file size using Handbrake's standard H264 profiles such as bbaseline, main, and high for pass-through, I'll give that a try.
And if that doesn't work, I'll try MediaInfo and will pass along any other questions and findings here.
Many many thanks,
Jae
