[FFmpeg-devel] [PATCH v2 1/2] avcodec/libx26[45]: add udu_sei option to import user data unregistered SEIs

[lance.lmwang@gmail.com]

From: Limin Wang <lance.lmwang@gmail.com>

Most of user data unregistered SEIs are privated data which defined by user/
encoder. currently, the user data unregistered SEIs found in input are forwarded
as side-data to encoders directly, it'll cause the reencoded output including some
useless UDU SEIs.

I prefer to add one option to enable/disable it and default is off after I saw
the patch by Andreas Rheinhardt:

https://patchwork.ffmpeg.org/project/ffmpeg/patch/AM7PR03MB66607C2DB65E1AD49D975CF18F7B9@AM7PR03MB6660.eurprd03.prod.outlook.com/

How to test by cli:
ffmpeg -y -f lavfi -i testsrc -c:v libx264 -frames:v 1 a.ts
ffmpeg -y -i a.ts -c:v libx264 -udu_sei 1 b.ts
ffmpeg -y -i a.ts -c:v libx264 -udu_sei 0 c.ts

# check the user data unregistered SEIs, you'll see two UDU SEIs for b.ts.
# and mediainfo will show with wrong encoding setting info
ffmpeg -i b.ts -vf showinfo -f null -
ffmpeg -i c.ts -vf showinfo -f null -

This fixes tickets #9500 and #9557.
---
 doc/encoders.texi    | 6 ++++++
 libavcodec/libx264.c | 5 ++++-
 libavcodec/libx265.c | 4 ++++
 libavcodec/version.h | 2 +-
 4 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/doc/encoders.texi b/doc/encoders.texi
index 8a7589c..e3b61de 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -2660,6 +2660,9 @@ ffmpeg -i foo.mpg -c:v libx264 -x264opts keyint=123:min-keyint=20 -an out.mkv
 Import closed captions (which must be ATSC compatible format) into output.
 Only the mpeg2 and h264 decoders provide these. Default is 1 (on).
 
+@item udu_sei @var{boolean}
+Import user data unregistered SEI if available into output. Default is 0 (off).
+
 @item x264-params (N.A.)
 Override the x264 configuration using a :-separated list of key=value
 parameters.
@@ -2741,6 +2744,9 @@ Quantizer curve compression factor
 Normally, when forcing a I-frame type, the encoder can select any type
 of I-frame. This option forces it to choose an IDR-frame.
 
+@item udu_sei @var{boolean}
+Import user data unregistered SEI if available into output. Default is 0 (off).
+
 @item x265-params
 Set x265 options using a list of @var{key}=@var{value} couples separated
 by ":". See @command{x265 --help} for a list of options.
diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 2b680ab..9836818 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -104,6 +104,7 @@ typedef struct X264Context {
     int chroma_offset;
     int scenechange_threshold;
     int noise_reduction;
+    int udu_sei;
 
     AVDictionary *x264_params;
 
@@ -464,6 +465,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
             }
         }
 
+        if (x4->udu_sei) {
         for (int j = 0; j < frame->nb_side_data; j++) {
             AVFrameSideData *side_data = frame->side_data[j];
             void *tmp;
@@ -487,6 +489,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
             sei_payload->payload_type = SEI_TYPE_USER_DATA_UNREGISTERED;
             sei->num_payloads++;
         }
+        }
     }
 
     do {
@@ -1168,7 +1171,7 @@ static const AVOption options[] = {
     { "chromaoffset", "QP difference between chroma and luma",            OFFSET(chroma_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, VE },
     { "sc_threshold", "Scene change threshold",                           OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, VE },
     { "noise_reduction", "Noise reduction",                               OFFSET(noise_reduction), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, VE },
-
+    { "udu_sei",      "Use user data unregistered SEI if available",      OFFSET(udu_sei),  AV_OPT_TYPE_BOOL,   { .i64 = 0 }, 0, 1, VE },
     { "x264-params",  "Override the x264 configuration using a :-separated list of key=value parameters", OFFSET(x264_params), AV_OPT_TYPE_DICT, { 0 }, 0, 0, VE },
     { NULL },
 };
diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c
index 7dd70a3..47d0103 100644
--- a/libavcodec/libx265.c
+++ b/libavcodec/libx265.c
@@ -54,6 +54,7 @@ typedef struct libx265Context {
 
     void *sei_data;
     int sei_data_size;
+    int udu_sei;
 
     /**
      * If the encoder does not support ROI then warn the first time we
@@ -543,6 +544,7 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
             memcpy(x265pic.userData, &pic->reordered_opaque, sizeof(pic->reordered_opaque));
         }
 
+        if (ctx->udu_sei) {
         for (i = 0; i < pic->nb_side_data; i++) {
             AVFrameSideData *side_data = pic->side_data[i];
             void *tmp;
@@ -568,6 +570,7 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
             sei_payload->payloadType = SEI_TYPE_USER_DATA_UNREGISTERED;
             sei->numPayloads++;
         }
+        }
     }
 
     ret = ctx->api->encoder_encode(ctx->encoder, &nal, &nnal,
@@ -708,6 +711,7 @@ static const AVOption options[] = {
     { "preset",      "set the x265 preset",                                                         OFFSET(preset),    AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "tune",        "set the x265 tune parameter",                                                 OFFSET(tune),      AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
     { "profile",     "set the x265 profile",                                                        OFFSET(profile),   AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { "udu_sei",      "Use user data unregistered SEI if available",                                OFFSET(udu_sei),   AV_OPT_TYPE_BOOL,   { .i64 = 0 }, 0, 1, VE },
     { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_DICT,   { 0 }, 0, 0, VE },
     { NULL }
 };
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 580b099..45c6d13 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  59
 #define LIBAVCODEC_VERSION_MINOR  15
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MICRO 102
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
-- 
1.8.3.1

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