---
libavfilter/vf_thumbnail.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/libavfilter/vf_thumbnail.c b/libavfilter/vf_thumbnail.c
index 0effdc91e9..30bb0dfdb8 100644
--- a/libavfilter/vf_thumbnail.c
+++ b/libavfilter/vf_thumbnail.c
@@ -136,6 +136,7 @@ static int filter_frame(AVFilterLink *inlink,
AVFrame *frame)
AVFilterLink *outlink = ctx->outputs[0];
int *hist = s->frames[s->n].histogram;
const uint8_t *p = frame->data[0];
+ int stride = frame->format == AV_PIX_FMT_BGRA || frame->format ==
AV_PIX_FMT_RGBA ? 4 : 3;
// keep a reference of each frame
s->frames[s->n].buf = frame;
@@ -143,9 +144,9 @@ static int filter_frame(AVFilterLink *inlink,
AVFrame *frame)
// update current frame RGB histogram
for (j = 0; j < inlink->h; j++) {
for (i = 0; i < inlink->w; i++) {
- hist[0*256 + p[i*3 ]]++;
- hist[1*256 + p[i*3 + 1]]++;
- hist[2*256 + p[i*3 + 2]]++;
+ hist[0*256 + p[i*stride ]]++;
+ hist[1*256 + p[i*stride + 1]]++;
+ hist[2*256 + p[i*stride + 2]]++;
}
p += frame->linesize[0];
}
@@ -197,6 +198,7 @@ static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_NONE
};
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
--
2.19.1
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