avformat: add an AV1 Low overhead bitstream format muxer

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

Changelog

@@ -15,6 +15,7 @@ version <next>:
 - adecorrelate audio filter
 - atilt audio filter
 - grayworld video filter
+- AV1 Low overhead bitstream format muxer
 
 
 version 4.4:

configure

@@ -3388,6 +3388,7 @@ mxf_opatom_muxer_select="mxf_muxer"
 nut_muxer_select="riffenc"
 nuv_demuxer_select="riffdec"
 obu_demuxer_select="av1_frame_merge_bsf av1_parser"
+obu_muxer_select="av1_metadata_bsf"
 oga_muxer_select="ogg_muxer"
 ogg_demuxer_select="dirac_parse"
 ogv_muxer_select="ogg_muxer"

doc/general_contents.texi

@@ -599,6 +599,7 @@ library:
 @item raw NULL                  @tab X @tab
 @item raw video                 @tab X @tab X
 @item raw id RoQ                @tab X @tab
+@item raw OBU                   @tab X @tab X
 @item raw SBC                   @tab X @tab X
 @item raw Shorten               @tab   @tab X
 @item raw TAK                   @tab   @tab X

libavformat/Makefile

@@ -379,6 +379,7 @@ OBJS-$(CONFIG_NUT_MUXER)                 += nutenc.o nut.o
 OBJS-$(CONFIG_NUV_DEMUXER)               += nuv.o
 OBJS-$(CONFIG_AV1_DEMUXER)               += av1dec.o
 OBJS-$(CONFIG_OBU_DEMUXER)               += av1dec.o
+OBJS-$(CONFIG_OBU_MUXER)                 += rawenc.o
 OBJS-$(CONFIG_OGG_DEMUXER)               += oggdec.o         \
                                             oggparsecelt.o   \
                                             oggparsedirac.o  \

libavformat/allformats.c

@@ -305,6 +305,7 @@ extern const AVInputFormat  ff_nut_demuxer;
 extern const AVOutputFormat ff_nut_muxer;
 extern const AVInputFormat  ff_nuv_demuxer;
 extern const AVInputFormat  ff_obu_demuxer;
+extern const AVOutputFormat ff_obu_muxer;
 extern const AVOutputFormat ff_oga_muxer;
 extern const AVInputFormat  ff_ogg_demuxer;
 extern const AVOutputFormat ff_ogg_muxer;

libavformat/rawenc.c

@@ -453,6 +453,26 @@ const AVOutputFormat ff_mpeg2video_muxer = {
 };
 #endif
 
+#if CONFIG_OBU_MUXER
+static int obu_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
+{
+    AVStream *st = s->streams[0];
+    return ff_stream_add_bitstream_filter(st, "av1_metadata", "td=insert");
+}
+
+const AVOutputFormat ff_obu_muxer = {
+    .name              = "obu",
+    .long_name         = NULL_IF_CONFIG_SMALL("AV1 low overhead OBU"),
+    .extensions        = "obu",
+    .audio_codec       = AV_CODEC_ID_NONE,
+    .video_codec       = AV_CODEC_ID_AV1,
+    .init              = force_one_stream,
+    .write_packet      = ff_raw_write_packet,
+    .check_bitstream   = obu_check_bitstream,
+    .flags             = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
 #if CONFIG_RAWVIDEO_MUXER
 const AVOutputFormat ff_rawvideo_muxer = {
     .name              = "rawvideo",

libavformat/version.h

@@ -32,8 +32,8 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  59
-#define LIBAVFORMAT_VERSION_MINOR   4
-#define LIBAVFORMAT_VERSION_MICRO 102
+#define LIBAVFORMAT_VERSION_MINOR   5
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \