Commit e5605b4bb4 for ffmpeg

commit e5605b4bb4d981fc88bbe0c19d803724e196de66
Author: James Almer <jamrial@gmail.com>
Date:   Mon Oct 19 11:19:57 2026 -0300

    avformat: add an split Color and Alpha channel Stream Group

    Signed-off-by: James Almer <jamrial@gmail.com>

diff --git a/doc/APIchanges b/doc/APIchanges
index 6fdb77deaa..748e7d938f 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -2,6 +2,9 @@ The last version increases of all libraries were on 2026-06-23.

 API changes, most recent first:

+2026-10-23 - xxxxxxxxxxx - lavf 63.14.100 - avformat.h
+  Add AV_STREAM_GROUP_PARAMS_ALPHA.
+
 2026-10-21 - b8249f73a7c - lavu 61.16.100 - hwcontext.h
   Add av_hwframe_get_transfer_buffer().

diff --git a/libavformat/avformat.c b/libavformat/avformat.c
index e8ebb89097..aca8c4834f 100644
--- a/libavformat/avformat.c
+++ b/libavformat/avformat.c
@@ -123,6 +123,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
     case AV_STREAM_GROUP_PARAMS_LCEVC:
     case AV_STREAM_GROUP_PARAMS_DOLBY_VISION:
     case AV_STREAM_GROUP_PARAMS_GAIN_MAP:
+    case AV_STREAM_GROUP_PARAMS_ALPHA:
         av_opt_free(stg->params.layered_video);
         av_freep(&stg->params.layered_video);
         break;
@@ -290,6 +291,7 @@ const char *avformat_stream_group_name(enum AVStreamGroupParamsType type)
     case AV_STREAM_GROUP_PARAMS_TREF:                      return "Track Reference";
     case AV_STREAM_GROUP_PARAMS_DOLBY_VISION:              return "Dolby Vision (Split base and enhancement layer)";
     case AV_STREAM_GROUP_PARAMS_GAIN_MAP:                  return "Gain Map (Split base rendition and gain map)";
+    case AV_STREAM_GROUP_PARAMS_ALPHA:                     return "Alpha (Split color and alpha channels)";
     }
     return NULL;
 }
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index fc46ae6b8d..664a291ea4 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1098,8 +1098,8 @@ typedef struct AVStreamGroupTileGrid {
  * layer video stream and a separate enhancement layer stream that together
  * form a single layered video presentation (for example a video stream and a
  * data stream containing LCEVC enhancement layer NALUs, Dolby Vision
- * Profile 7 dual-layer encoding, or a base rendition accompanied by an
- * ISO 21496-1 gain map).
+ * Profile 7 dual-layer encoding, an Alpha plane being a separate stream, or
+ * a base rendition accompanied by an ISO 21496-1 gain map).
  *
  * The enhancement layer stream is identified by @ref el_index.
  */
@@ -1165,6 +1165,7 @@ enum AVStreamGroupParamsType {
     AV_STREAM_GROUP_PARAMS_TREF,
     AV_STREAM_GROUP_PARAMS_DOLBY_VISION,
     AV_STREAM_GROUP_PARAMS_GAIN_MAP,
+    AV_STREAM_GROUP_PARAMS_ALPHA,
 };

 struct AVIAMFAudioElement;
diff --git a/libavformat/options.c b/libavformat/options.c
index df7b6434d8..e6ab0a7e38 100644
--- a/libavformat/options.c
+++ b/libavformat/options.c
@@ -404,6 +404,7 @@ static void *stream_group_child_next(void *obj, void *prev)
         case AV_STREAM_GROUP_PARAMS_LCEVC:
         case AV_STREAM_GROUP_PARAMS_DOLBY_VISION:
         case AV_STREAM_GROUP_PARAMS_GAIN_MAP:
+        case AV_STREAM_GROUP_PARAMS_ALPHA:
             return stg->params.layered_video;
         default:
             break;
@@ -438,6 +439,7 @@ static const AVClass *stream_group_child_iterate(void **opaque)
     case AV_STREAM_GROUP_PARAMS_LCEVC:
     case AV_STREAM_GROUP_PARAMS_DOLBY_VISION:
     case AV_STREAM_GROUP_PARAMS_GAIN_MAP:
+    case AV_STREAM_GROUP_PARAMS_ALPHA:
         ret = &layered_video_class;
         break;
     default:
@@ -518,6 +520,7 @@ AVStreamGroup *avformat_stream_group_create(AVFormatContext *s,
     case AV_STREAM_GROUP_PARAMS_LCEVC:
     case AV_STREAM_GROUP_PARAMS_DOLBY_VISION:
     case AV_STREAM_GROUP_PARAMS_GAIN_MAP:
+    case AV_STREAM_GROUP_PARAMS_ALPHA:
         stg->params.layered_video = av_mallocz(sizeof(*stg->params.layered_video));
         if (!stg->params.layered_video)
             goto fail;
diff --git a/libavformat/version.h b/libavformat/version.h
index e8fad25023..14bf700274 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -31,7 +31,7 @@

 #include "version_major.h"

-#define LIBAVFORMAT_VERSION_MINOR  13
+#define LIBAVFORMAT_VERSION_MINOR  14
 #define LIBAVFORMAT_VERSION_MICRO 100

 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \