[FFmpeg-devel] [PATCH 1/2] avcodec/vaapi: slice_vertical_position starts from zero for the second field

[Jerome Borsboom]

Is your VAAPI library and VAAPI driver new enough? You need at least
libva-2.1.0 (VA-API version 1.1.0) and intel-vaapi-driver-2.1.0 for
interlaced VC-1 decoding. From the output, I think you are using an
older version and the error is just the libva library bailing out for
not supporting interlaced VC-1.


Regards,
Jerome

> are these 2 patches enough or something else ?
> It feels like iam missing something but
> 
> i tried
> ./ffmpeg -hwaccel vaapi -i SA10180.vc1 -pix_fmt yuv420p -f framecrc crcpatch12
> 
> but ffmpeg spews errors at me:
> 
> ibva info: VA-API version 0.39.0
> libva info: va_getDriverName() returns 0
> libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
> libva info: Found init function __vaDriverInit_0_39
> libva info: va_openDriver() returns 0
> Stream mapping:
>   Stream #0:0 -> #0:0 (vc1 (native) -> rawvideo (native))
> Press [q] to stop, [?] for help
> Output #0, framecrc, to 'crcpatch12':
>   Metadata:
>     encoder         : Lavf58.17.100
>     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x480 [SAR 1:1 DAR 3:2], q=2-31, 103680 kb/s, 25 fps, 25 tbn, 25 tbc
>     Metadata:
>       encoder         : Lavc58.20.102 rawvideo
> [vc1 @ 0x3d430c0] Failed to end picture decode issue: 23 (unknown libva error / description missing).
> Error while decoding stream #0:0: Input/output error