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

["\"zhilizhao(赵志立)\"" <quinkblack@foxmail.com>]

> On Dec 28, 2021, at 9:29 AM, lance.lmwang@gmail.com wrote:
> 
> On Sat, Dec 25, 2021 at 10:46:52PM +0800, lance.lmwang@gmail.com wrote:
>> 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
>> 
> 
> plan to apply tomorrow unless there are objections.

LGTM. Since a lot people are enjoying their vacation, maybe waiting a few more days.

> 
> 
> -- 
> Thanks,
> Limin Wang
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