[mythtv-users] Scrambled preview image after HandBrakeCLI transcode

[William Jacoby]

On 5/19/2014 8:44 AM, David H. Johnson, III wrote:
> I'm having the same issue as Mark
> (http://www.gossamer-threads.com/lists/mythtv/users/555356) --
> mythpreviewgen is cranking out scrambled/garbled images (exact symptoms
> as Mark's) on my HandBrakeCLI-transcoded MP4s.  I tried Mike(mtdean)'s
> solution and ran
>
> mythcommflag --rebuild --file /var/lib/mythtv/recordings/2002_20140429140000.mp4
>
> but still get the same scrambled images.  Am I missing something?  Prior
> to running mythcommflag, I updated the filename, filesize and transcoded
> fields for the appropriate record in the recorded table.  Is there
> anything else I need to update?
>
> Thank you,
> David
>
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A solution I found(inadvertantly while working on cobling my own bash 
userjob script) is to use ffmpeg: 
http://forums.roku.com/viewtopic.php?p=342975#p342975  I'm not sure if 
it works as I don't use it, but might give you somewhere to start.