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AWS Media Convert removes silent audio which causes the output video to be severly out-of-sync with audio

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Hi re:Post community,

We have been using AWS Elemental MediaConvert for about 3 years but we have encountered some very strange behaviour roughly from the 10th of December 22 onwards. MediaConvert started removing all of the silent audio from our audio inputs and it merges all the speech in the input together. This is causing major syncing issues between the video and the audio in the output file.

The rough specification of our MediaConvert jobs is:

  • video input: H.264 or VP8
  • audio input: Matroska with OPUS
  • output: MPEG-4 AVC (H.264)

We started receiving customer reports on the 12th of December saying that their videos are out of sync. I found a job from 9 Dec that was OK and I cloned and reran the job today (19 Dec). The result from today was missing all the silent audio which was matching all the broken files reported by our customers. The two jobs are using exactly the same inputs and the same configuration.

This makes me think something must've changed internally in MediaConvert that is causing these issues. Perhaps a new setting?

Has anyone experienced the same?

Thanks Michal

Topics
Media Services
Tags
AWS Elemental MediaConvert
Language
English
asked 3 years ago178 views
1 Answer
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Hi Michal,

I sincerely apologize for the delayed response to your inquiry. Your message was misplaced during the Re:post process, and we'll ensure this doesn't happen again.

I understand your concern regarding the AWS MediaConvert job inconsistency - specifically how a previous job succeeded while a new one failed, despite using identical settings and source files.

Should this issue recur, I strongly recommend:

Opening a support case through the AWS Console Including both job IDs and your AWS region in the ticket This will allow us to use our internal tools for thorough troubleshooting. For your reference, you can stay updated on important changes by checking the MediaConvert release notes. https://docs.aws.amazon.com/mediaconvert/latest/ug/doc-history.html

Please let me know if you need any further assistance.

Best regards

AWS
EXPERT
answered a year ago

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