> On Feb 27, 2024, at 1:49 PM, James Almer <jamr...@gmail.com> wrote:
> 
>>> SVT-AV1 1.8.0 has this value set to 1.8.0, same as in the current git head 
>>> commit. Is this in preparation for an upcoming release?
>> Yes, this is in preparation for release 2.0 which is targeted for next week. 
>> https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/2155 is tracking the 
>> status, and this API change is one of the outstanding items.
> 
> Without this patch, the command "ffmpeg -lavfi testsrc,format=yuv420p 
> -vframes 101 -c:v libsvtav1 -loglevel debug -f null -" gives this:
> 
>> Output stream #0:0 (video): 101 frames encoded; 101 packets muxed (17890 
>> bytes);
>> Total: 101 packets (17890 bytes) muxed
>> frame=  101 fps=0.0 q=31.0 Lsize=N/A time=00:00:04.00 bitrate=N/A
> 
> Whereas with it applied, i get:
> 
>> Output stream #0:0 (video): 101 frames encoded; 100 packets muxed (17885 
>> bytes);
>> Total: 100 packets (17885 bytes) muxed
>> frame=  100 fps=0.0 q=35.0 Lsize=N/A time=00:00:03.96 bitrate=N/A
> 
> If i pass it a single frame, i get no output at all. So the last frame is 
> being lost.

This change depends on the API change on the SVT-AV1 side, which is in in 
https://gitlab.com/AOMediaCodec/SVT-AV1/-/merge_requests/2189

This will get merged in shortly as part of the 2.0 release. If I build this 
patch against the low-delay-api-change branch (from PR 2189) then I get 

> Output stream #0:0 (video): 101 frames encoded; 101 packets muxed (17970 
> bytes);
> Total: 101 packets (17970 bytes) muxed


- Cosmin
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