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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - VCE dual instance encoding inconsistent since st/va: enable dual instances encode by sync surface"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98005">98005</a>
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<th>Summary</th>
<td>VCE dual instance encoding inconsistent since st/va: enable dual instances encode by sync surface
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>adf.lists@gmail.com
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<pre>Bit late with this one, but I didn't notice initially.
It seems there is some timing/sync issue on R9285 with dual instance enabled
after
c59628d11b134fc016388a170880f7646e100d6f
st/va: enable dual instances encode by sync surface
Testing with large rawvideo/higher bitrates lucked me out of noticing initially
as visually these tend to be OK, though making say 20 and md5summing them will
show inconsistencies. I can change the number of "bads" in some tests by
flipping my cpus between cpufreq on_demand and perf.
At lower sizes/bitrates/transcoding it's possible to get corruption, either in
the form of some runs giving abnormally low bitrate with vbr, or sometimes with
cbr there is a chance of an out of order frame around an IDR frame.
Testing this with gstreamer.</pre>
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