mux: mp4: generate AV1 extradata when missing

modules/mux/Makefile.am

@@ -13,6 +13,8 @@ libmux_mp4_plugin_la_SOURCES = mux/mp4/mp4.c \
 	packetizer/hxxx_nal.c packetizer/hxxx_nal.h \
         packetizer/hevc_nal.c packetizer/hevc_nal.h \
         packetizer/h264_nal.c packetizer/h264_nal.h
+libmux_mp4_plugin_la_SOURCES += $(extradata_builder_SOURCES)
+
 libmux_mpjpeg_plugin_la_SOURCES = mux/mpjpeg.c
 libmux_ps_plugin_la_SOURCES = \
 	mux/mpeg/pes.c mux/mpeg/pes.h \

modules/mux/mp4/libmp4mux.c

@@ -2255,15 +2255,7 @@ bool mp4mux_CanMux(vlc_object_t *p_obj, const es_format_t *p_fmt,
     case VLC_CODEC_YUYV:
     case VLC_CODEC_VC1:
     case VLC_CODEC_WMAP:
-        break;
     case VLC_CODEC_AV1:
-        /* Extradata is an AVC1DecoderConfigurationRecord */
-        if(p_fmt->i_extra < 4 || ((uint8_t *)p_fmt->p_extra)[0] != 0x81)
-        {
-            if(p_obj)
-                msg_Err(p_obj, "Can't mux AV1 without extradata");
-            return false;
-        }
         break;
     case VLC_CODEC_H264:
         if(!p_fmt->i_extra && p_obj)

modules/mux/mp4/mp4.c

@@ -44,6 +44,7 @@
 #include "libmp4mux.h"
 #include "../packetizer/hxxx_nal.h"
 #include "../av1_pack.h"
+#include "../extradata.h"
 
 /*****************************************************************************
  * Module descriptor
@@ -130,6 +131,8 @@ typedef struct
     mp4mux_trackinfo_t *tinfo;
     const es_format_t *p_fmt;
 
+    mux_extradata_builder_t *extrabuilder;
+
     /* index */
     vlc_tick_t   i_length_neg;
 
@@ -177,6 +180,9 @@ typedef struct
 
 static void mp4_stream_Delete(mp4_stream_t *p_stream)
 {
+    if(p_stream->extrabuilder)
+        mux_extradata_builder_Delete(p_stream->extrabuilder);
+
     /* mp4 frag */
     if (p_stream->p_held_entry)
     {
@@ -520,6 +526,7 @@ static int AddStream(sout_mux_t *p_mux, sout_input_t *p_input)
         return VLC_ENOMEM;
     }
 
+    p_stream->extrabuilder = mux_extradata_builder_New(p_input->p_fmt->i_codec);
     p_stream->p_fmt = p_input->p_fmt;
 
     p_input->p_sys          = p_stream;
@@ -602,6 +609,17 @@ static block_t * BlockDequeue(sout_input_t *p_input, mp4_stream_t *p_stream)
     if(unlikely(!p_block))
         return NULL;
 
+    /* Create on the fly extradata as packetizer is not in the loop */
+    if(p_stream->extrabuilder && !mp4mux_track_HasSamplePriv(p_stream->tinfo))
+    {
+         mux_extradata_builder_Feed(p_stream->extrabuilder,
+                                    p_block->p_buffer, p_block->i_buffer);
+         const uint8_t *p_extra;
+         size_t i_extra = mux_extradata_builder_Get(p_stream->extrabuilder, &p_extra);
+         if(i_extra)
+            mp4mux_track_SetSamplePriv(p_stream->tinfo, p_extra, i_extra);
+    }
+
     switch(p_stream->p_fmt->i_codec)
     {
         case VLC_CODEC_AV1: