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http://opencast.jira.com/browse/MH-8272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=28829#comment-28829
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Christopher Brooks commented on MH-8272:
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Assigning to Akm.
Adam, can you please make sure that the workaround of not failing the workflows
has been added to 1.2.1 so we can close this issue off for the branch?
> FFMPEG gives error of 1 when trying to extract image files from VGA feed
> ------------------------------------------------------------------------
>
> Key: MH-8272
> URL: http://opencast.jira.com/browse/MH-8272
> Project: Matterhorn Project
> Issue Type: Task
> Components: Architecture & Services
> Affects Versions: 1.2
> Reporter: Christopher Brooks
> Assignee: Adam McKenzie
> Priority: Release Blocker
> Fix For: 1.2.1
>
>
> Sometimes, VGA video that is captured from the capture agent fails to
> segment. FFMPEG fails to extract segments in particular, here's a command
> that we have failing:
> ffmpeg -strict inofficial -y -i
> /data2/opencast/workspace/mediapackage/3c995799-7220-4d95-b1c1-14310a2e428a/af97fe33-8d91-4166-ab47-fd4022c8eece/vga.mpg
> -ss 2435 -r 1 -vframes 1 -f image2 -pix_fmt rgb24
> /data2/opencast/workspace/mediapackage/3c995799-7220-4d95-b1c1-14310a2e428a/af97fe33-8d91-4166-ab47-fd4022c8eece/vga_2435_7aabe258-39c7-43ae-9fe6-5cd943b2788a.2435.jpeg
>
> This has happened with media from various capture agents, and does not seem
> deterministic. Once media has a problem, it is 100% reproducable with that
> media. The problem is with ffmpeg.
> Potential work around: change the default workflow to not fail on error.
> Then lectures should process, albeit not completely correctly since they
> won't be segmented *sometimes*. This is being tested on U of S test stack.
> Other workaround: reencoding the media to mkv (default settings) then
> reprocessing the media makes this problem go away (segmentation is
> successful).
> Open issue: Unclear whether newer ffmpeg solves this issue.
> Waiting on local team to make media available for further testing.
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