avformat: add AVFormatContext.name

Analog to AVFilterContext. May be used to set a custom logging name to
disambiguate multiple AVFormatContext instances in the logs.

doc/APIchanges

@@ -2,6 +2,9 @@ The last version increases of all libraries were on 2025-03-28
 
 API changes, most recent first:
 
+2026-02-xx - xxxxxxxxxx - lavf 62.9.100 - avformat.h
+  Add AVFormatContext.name.
+
 2026-01-xx - xxxxxxxxxx - lavu 60.24.100 - hwcontext_d3d11va.h
   Add BindFlags and MiscFlags to AVD3D11VADeviceContext
 

libavformat/avformat.c

@@ -190,6 +190,7 @@ void avformat_free_context(AVFormatContext *s)
     if (s->iformat)
         ff_flush_packet_queue(s);
     av_freep(&s->url);
+    av_freep(&s->name);
     av_free(s);
 }
 

libavformat/avformat.h

@@ -1884,6 +1884,11 @@ typedef struct AVFormatContext {
      * @see skip_estimate_duration_from_pts
      */
     int64_t duration_probesize;
+
+    /**
+     * Name of this format context, only used for logging purposes.
+     */
+    char *name;
 } AVFormatContext;
 
 /**

libavformat/options.c

@@ -45,7 +45,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
 static const char* format_to_name(void* ptr)
 {
     AVFormatContext* fc = (AVFormatContext*) ptr;
-    if(fc->iformat) return fc->iformat->name;
+    if (fc->name) return fc->name;
+    else if(fc->iformat) return fc->iformat->name;
     else if(fc->oformat) return fc->oformat->name;
     else return fc->av_class->class_name;
 }

libavformat/version.h

@@ -31,8 +31,8 @@
 
 #include "version_major.h"
 
-#define LIBAVFORMAT_VERSION_MINOR   8
-#define LIBAVFORMAT_VERSION_MICRO 102
+#define LIBAVFORMAT_VERSION_MINOR   9
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \