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ndufresne: <u>dv_</u>: we use Fffmpeg h264 decoder debug log to validate macro block structures, we have not investigated the intra refresh, though we have some information about the second reference
dv_: <u>ndufresne</u>: found that, and I figured it out
<br> it is cyclic in the sense that the interval is the interval between macroblocks, so interval 4 means I d d d I d d d I d d d I ...
<br> and the caller must adjust the start offset, otherwise the intra macroblocks always start at the same offset, which is not what you want
<br> and, if the interval equals the total macroblock count, then there is only one intra macroblock (regarding the macroblocks that come from the intra refresh - the encoder additionally inserts intra macroblocks sometimes separately from that)
<br> but with intra refresh operating properly, the IDR frame size peaks are gone, which was the overall goal
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ndufresne: <u>dv_</u>: thanks for this explanation, I'm not sure the existing control enum have something that correctly describes this, but I suspect that we can use the lazy "random" mode added by Venus folk, as it fits virtually anything that spreads the intra refresh evenly
<br> (in some ways, I may agree users don't care, it's the same visual effect)
<br> <u>dv_</u>: and yeah, we noticed the HW adds intra block even for a static image being streamed
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sirspudd: <u>ipu1_csi0</u>: entity ov7251 0-0060 does not implement get_mbus_config()
<br> <u>ipu1_csi0</u>: failed to get upstream media bus configuration
<br> is this a benign error?
<br> I am still seeing: imx-ipuv3-csi imx-ipuv3-csi.0: pipeline start failed with -32, running 6.7 on the imx6
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sirspudd: Ah, I have had partial success by reverting: commit 7318abface486d6a6389731810f5b60650daedb5; Author: Philipp Zabel <p.zabel@pengutronix.de>; media: imx: Use get_mbus_config instead of parsing upstream DT endpoints
<br> get_mbus_config is implemented for very few sensors; does that mean these sensors will fail hard against the imx-media-csi framework?
<br> I am now living the dream of NFB4EOF :D
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