[FFmpeg-user] overlay_qsv with hardware decode and encode

[Vladimir Mishonov]

On 2025-02-28 19:53, Greg Oliver wrote:
> On Thu, Feb 27, 2025 at 11:49 PM Vladimir Mishonov via ffmpeg-user <
> ffmpeg-user at ffmpeg.org> wrote:
> 
> Sorry - that link I referenced actually did not have the whole thread.  
> The
> piece I intended to be included was:
> 
> https://lists.ffmpeg.org/pipermail/ffmpeg-user/2024-September/058652.html
> 


Unfortunately, the -noautoscale option does not work either, I've 
already tried that before.

It is, however, not surprising that it has no effect because 
-noautoscale is an output option. And in my scenario, the output 
resolution does not change over time.

As for the patch linked in that thread, I have yet to try it. Not sure 
if it's already been merged into master; if not, it means I have to 
compile a build myself, and setting everything up for that is likely 
going to take a while...

> If that does not solve it - sorry - I do not use QSV (except in Plex) 
> for
> anything - I just remembered seeing that email thread a while back, so
> looked it up.  This one has a resolution, but I am unsure if it is 
> software
> or hardware.
> 

No problem. What I still cannot understand is whether this is some kind 
of fundamental limitation or an outright bug. For some reason, I could 
find very little information about this particular scenario. Whenever I 
search for that error message ("impossible to convert between..."), it 
always seems to concern a completely different use case.

> 
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