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salamsejahtera
Inspiring
May 31, 2018
Answered

Exported video has 10x higher bitrate than selected (VBR, 1-pass)

  • May 31, 2018
  • 1 reply
  • 732 views

These are my AME CC 2018 (12.1.1 | Build 12) settings. 0.30Mbps for 100 minutes (file size is the target). But my exported video has a bitrate of 2.9Mbps (and a 2.06GB file size to boot).

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What has gone wrong here? Sure, VBR 2-pass would save me a few bits, but I can't fathom how this 10x size increase has happened. It should be 300kbps, not 3,000kbps. For peculiarities, I used hardware acceleration (QSV) and added a timecode. But besides that...this video is plain jane (recorded via OBS).

    This topic has been closed for replies.
    Correct answer salamsejahtera

    Found the answer: the "hardware accelerated" (Quick Sync Video) dribble: beyond worthless for lower bit rates. Switching to software only fixed it right up with the output bit rates actually matching the specified bit rates.

    Hopefully this can help others.

    1 reply

    S
    salamsejahteraAuthor
    Inspiring
    May 31, 2018

    Even the minimum bitrate is still 2x the target. Has anyone experienced this issue?

    xNqEdks.png

    And, for what it's worth, I ran it again on a much smaller portion of the file (~5 seconds). It's still 10x the bitrate (and thus 10x the size).

    DqVf0s0.png

    S
    salamsejahteraAuthorCorrect answer
    Inspiring
    June 1, 2018

    Found the answer: the "hardware accelerated" (Quick Sync Video) dribble: beyond worthless for lower bit rates. Switching to software only fixed it right up with the output bit rates actually matching the specified bit rates.

    Hopefully this can help others.

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