[Bf-blender-cvs] [fe4cbe62dff] blender-v2.93-release: Fix T87932: Failure to build movie strip proxy

[Sebastian Parborg]

Commit: fe4cbe62dff28933d6b5b66a2a9e95074016fd1e
Author: Sebastian Parborg
Date:   Fri May 28 18:35:26 2021 +0200
Branches: blender-v2.93-release
https://developer.blender.org/rBfe4cbe62dff28933d6b5b66a2a9e95074016fd1e

Fix T87932: Failure to build movie strip proxy

We didn't initialize the scaled proxy frame properly.
This would lead to issues in ffmpeg 4.4 as they are more strict that the API is properly used.

Now we initialize the size and format of the frame.

===================================================================

M	source/blender/imbuf/intern/indexer.c

===================================================================

diff --git a/source/blender/imbuf/intern/indexer.c b/source/blender/imbuf/intern/indexer.c
index 11ce77e3091..26f332bd575 100644
--- a/source/blender/imbuf/intern/indexer.c
+++ b/source/blender/imbuf/intern/indexer.c
@@ -466,13 +466,6 @@ struct proxy_output_ctx {
   struct anim *anim;
 };
 
-// work around stupid swscaler 16 bytes alignment bug...
-
-static int round_up(int x, int mod)
-{
-  return x + ((mod - (x % mod)) % mod);
-}
-
 static struct proxy_output_ctx *alloc_proxy_output_ffmpeg(
     struct anim *anim, AVStream *st, int proxy_size, int width, int height, int quality)
 {
@@ -595,15 +588,19 @@ static struct proxy_output_ctx *alloc_proxy_output_ffmpeg(
   if (st->codecpar->width != width || st->codecpar->height != height ||
       st->codecpar->format != rv->c->pix_fmt) {
     rv->frame = av_frame_alloc();
-    av_image_fill_arrays(
-        rv->frame->data,
-        rv->frame->linesize,
-        MEM_mallocN(av_image_get_buffer_size(rv->c->pix_fmt, round_up(width, 16), height, 1),
-                    "alloc proxy output frame"),
-        rv->c->pix_fmt,
-        round_up(width, 16),
-        height,
-        1);
+
+    av_image_fill_arrays(rv->frame->data,
+                         rv->frame->linesize,
+                         MEM_mallocN(av_image_get_buffer_size(rv->c->pix_fmt, width, height, 1),
+                                     "alloc proxy output frame"),
+                         rv->c->pix_fmt,
+                         width,
+                         height,
+                         1);
+
+    rv->frame->format = rv->c->pix_fmt;
+    rv->frame->width = width;
+    rv->frame->height = height;
 
     rv->sws_ctx = sws_getContext(st->codecpar->width,
                                  rv->orig_height,