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JerryPrice-3765 avatar image
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JerryPrice-3765 asked JohndeuMSFT answered

Azure Media - Assest Filter Start time - NOt working as expected

I changed the time increment to 1 sec (have tried both ways) ... Original video is 11:21 ... I would like to start at 9:00 ... so I set the value of 540 ... However this shortens the video to 8:21 and trims only about 3 minutes from the start ... I have tried different value to trying to find pattern with no luck ... Any ideals

azure-media-services
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JohndeuMSFT answered

I would need some more examples to see what you set in your filter exactly. Can you provide the filter settings that you used?
Also, how is the content encoded originally? 1 second GOPs or 2 sec GOPs? Any sample manifest you can provide?

Asset Filters are limited to the size of the GOP or distance between keyframes of the video fragments. Meaning, it is only doing a manifest manipulation filtering, and it is not doing any sort of re-encoding of the source video.

If you are looking to get "frame accurate" when generating clips, you will need to submit an encoding job to the standard encoder using the Clip feature. That will get you frame accurate sub clips.

Filters are meant for super-fast manifest manipulation, and publishing, and will always just modify the XML of DASH or the text of the HLS manifest, but won't touch the video content segments directly.

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