On 11/29/2022 5:07 AM, wenbin.chen-at-intel....@ffmpeg.org wrote:
From: Wenbin Chen <wenbin.c...@intel.com>
When process yuv420 frames, FFmpeg use same alignment on Y/U/V
planes. VPL and MSDK use Y plane's pitch / 2 as U/V planes's
pitch, which make U/V planes 16-bytes aligned. We need to set
a separate alignment to meet runtime's behaviour.
Now the commandline works fine:
ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 3082x1884 \
-i ./3082x1884.yuv -vf 'vpp_qsv=w=2466:h=1508' -f rawvideo \
-pix_fmt yuv420p 2466_1508.yuv
Signed-off-by: Wenbin Chen <wenbin.c...@intel.com>
---
libavfilter/qsvvpp.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/libavfilter/qsvvpp.c b/libavfilter/qsvvpp.c
index 8428ee89ab..ad09114cb7 100644
--- a/libavfilter/qsvvpp.c
+++ b/libavfilter/qsvvpp.c
@@ -408,9 +408,15 @@ static QSVFrame *submit_frame(QSVVPPContext *s,
AVFilterLink *inlink, AVFrame *p
} else {
/* make a copy if the input is not padded as libmfx requires */
if (picref->height & 31 || picref->linesize[0] & 31) {
- qsv_frame->frame = ff_get_video_buffer(inlink,
- FFALIGN(inlink->w, 32),
- FFALIGN(inlink->h, 32));
+ /* When process YUV420 frames, FFmpeg uses same alignment on Y/U/V
+ * planes. VPL and MSDK use Y plane's pitch / 2 as U/V planes's
+ * pitch, which makes U/V planes 16-bytes aligned. We need to set a
+ * separate alignment to meet runtime's behaviour.
+ */
+ qsv_frame->frame = ff_default_get_video_buffer2(inlink,
I think the proper way to do this is by setting a custom AVFilterPad
get_buffer.video() callback, which will be called instead of
ff_default_get_video_buffer() (Which uses an automatically chosen
alignment at runtime) by ff_get_video_buffer().
See other filters like vf_pad, vf_transpose_vaapi, etc.
+ FFALIGN(inlink->w, 32),
+ FFALIGN(inlink->h, 32),
+ 16);
if (!qsv_frame->frame)
return NULL;
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