[FFmpeg-devel] [PATCH v2] avfilter: propagate colorspace and color_range from buffer filter and between AVFilterLink.

[Damiano Galassi]

There two new fields were never sent down the filter chain,
and no filter after the first had colorspace and color_range set,
causing breakage in zscale and possible other filters.
---
 libavfilter/avfilter.c  | 4 ++++
 libavfilter/buffersrc.c | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 831871de90..66733f5ecf 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -391,6 +391,10 @@ int ff_filter_config_links(AVFilterContext *filter)
                         link->w = inlink->w;
                     if (!link->h)
                         link->h = inlink->h;
+                    if (link->colorspace == AVCOL_SPC_UNSPECIFIED)
+                        link->colorspace = inlink->colorspace;
+                    if (link->color_range == AVCOL_RANGE_UNSPECIFIED)
+                        link->color_range = inlink->color_range;
                 } else if (!link->w || !link->h) {
                     av_log(link->src, AV_LOG_ERROR,
                            "Video source filters must set their output link's "
diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index ddcd403785..2760097edf 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -499,6 +499,8 @@ static int config_props(AVFilterLink *link)
         link->w = c->w;
         link->h = c->h;
         link->sample_aspect_ratio = c->pixel_aspect;
+        link->colorspace = c->color_space;
+        link->color_range = c->color_range;
 
         if (c->hw_frames_ctx) {
             link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
-- 
2.39.3 (Apple Git-146)