[FFmpeg-devel] [PATCH 4/7] avformat/avformat: add a flag to signal muxers that support storing cropping values

[James Almer <jamrial@gmail.com>]

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavformat/avformat.h | 1 +
 libavformat/mux.c      | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 9e7eca007e..c099ca8a01 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -500,6 +500,7 @@ typedef struct AVProbeData {
                                         The user or muxer can override this through
                                         AVFormatContext.avoid_negative_ts
                                         */
+#define AVFMT_CROPPING     0x80000 /**< Format supports storing cropping values */
 
 #define AVFMT_SEEK_TO_PTS   0x4000000 /**< Seeking is based on PTS */
 
diff --git a/libavformat/mux.c b/libavformat/mux.c
index c7877c5d98..c5e8a4ca74 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -188,6 +188,7 @@ static int init_muxer(AVFormatContext *s, AVDictionary **options)
     AVDictionary *tmp = NULL;
     const FFOutputFormat *of = ffofmt(s->oformat);
     AVDictionaryEntry *e;
+    int warned_crop = 0;
     int ret = 0;
 
     if (options)
@@ -276,6 +277,13 @@ FF_ENABLE_DEPRECATION_WARNINGS
                     goto fail;
                 }
             }
+            if (!warned_crop && !(s->oformat->flags & AVFMT_CROPPING) &&
+                av_packet_side_data_get(st->codecpar->coded_side_data,
+                                        st->codecpar->nb_coded_side_data,
+                                        AV_PKT_DATA_FRAME_CROPPING)) {
+                av_log(s, AV_LOG_WARNING, "Muxer does not support storing cropping values\n");
+                warned_crop = 1;
+            }
             break;
         }
 
-- 
2.42.0

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