[FFmpeg-devel] [PATCH v1 2/2] avformat/rtmpproto: support enhanced rtmp
Steven Liu
lingjiujianke at gmail.com
Fri Aug 25 08:32:56 EEST 2023
Tristan Matthews <tmatth at videolan.org> 于2023年8月25日周五 04:11写道:
>
> Hi,
Hi Tristan,
>
> On Thu, Aug 24, 2023 at 1:32 AM Steven Liu <lq at chinaffmpeg.org> wrote:
> >
> > add option named rtmp_enhanced_codec,
> > it would support hvc1,av01,vp09 now,
> > the fourcc is using Array of strings.
> >
> > Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
> > ---
> > doc/protocols.texi | 6 ++++++
> > libavformat/rtmpproto.c | 38 ++++++++++++++++++++++++++++++++++++++
> > 2 files changed, 44 insertions(+)
> >
> > diff --git a/doc/protocols.texi b/doc/protocols.texi
> > index b3fad55591..f2930fb3a2 100644
> > --- a/doc/protocols.texi
> > +++ b/doc/protocols.texi
> > @@ -896,6 +896,12 @@ be named, by prefixing the type with 'N' and specifying the name before
> > the value (i.e. @code{NB:myFlag:1}). This option may be used multiple
> > times to construct arbitrary AMF sequences.
> >
> > + at item rtmp_enhanced_codec
> > +Specify that the media is an enhanced rtmp live stream. This option should
> > +set a sting like @code{hvc1,av01,vp09} for multiple codecs, or @code{hvc1}
>
> I think this should be more like "Specify the codecs to use in an
> enhanced rtmp live stream", the wording here makes it sound more like
> a boolean flag.
>
> Also nit: "set a string"
>
> > +for only one codec, set codec fourcc into fourCcLive property into
> > +Connect Command Message,
> > +
> > @item rtmp_flashver
> > Version of the Flash plugin used to run the SWF player. The default
> > is LNX 9,0,124,2. (When publishing, the default is FMLE/3.0 (compatible;
> > diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
> > index f0ef223f05..f7ce04244f 100644
> > --- a/libavformat/rtmpproto.c
> > +++ b/libavformat/rtmpproto.c
> > @@ -127,6 +127,7 @@ typedef struct RTMPContext {
> > int nb_streamid; ///< The next stream id to return on createStream calls
> > double duration; ///< Duration of the stream in seconds as returned by the server (only valid if non-zero)
> > int tcp_nodelay; ///< Use TCP_NODELAY to disable Nagle's algorithm if set to 1
> > + char *enhanced; ///< codecs list in enhanced rtmp
>
> nit: "codec list"
> > char username[50];
> > char password[50];
> > char auth_params[500];
> > @@ -336,6 +337,42 @@ static int gen_connect(URLContext *s, RTMPContext *rt)
> > ff_amf_write_field_name(&p, "app");
> > ff_amf_write_string2(&p, rt->app, rt->auth_params);
> >
> > + if (rt->enhanced) {
> > + uint32_t list_len = 0;
> > + char *fourcc_data = rt->enhanced;
> > + int fourcc_str_len = fourcc_data ? strlen(fourcc_data) : 0;
> > +
> > + // check the string, fourcc + ',' + ... + end fourcc correct length should be (4+1)*n+4
> > + if ((fourcc_str_len + 1) % 5 != 0)
> > + return AVERROR(EINVAL);
> > +
> > + list_len = (fourcc_str_len + 1) / 5;
> > + // write the fourCcList field name
> > + ff_amf_write_field_name(&p, "fourCcList");
> > +
> > + // write the fourcc array length
> > + ff_amf_write_array(&p, list_len);
> > +
> > + while(fourcc_data) {
> > + unsigned char fourcc[5];
> > + switch (*(uint32_t *)fourcc_data) {
> > + case MKTAG('h', 'v', 'c', '1'):
> > + case MKTAG('a', 'v', '0', '1'):
> > + case MKTAG('v', 'p', '0', '9'):
> > + strncpy(fourcc, fourcc_data, 4);
> > + fourcc[4] = '\0';
> > + ff_amf_write_string(&p, fourcc);
> > + break;
> > + default:
> > + return AVERROR(EINVAL);
> > + }
> > +
> > + fourcc_data += (fourcc_str_len - (fourcc_data - rt->enhanced)) > 4 ? 5 : 4;
> > + if (fourcc_data - rt->enhanced >= fourcc_str_len)
> > + break;
> > + }
> > + }
> > +
> > if (!rt->is_input) {
> > ff_amf_write_field_name(&p, "type");
> > ff_amf_write_string(&p, "nonprivate");
> > @@ -3104,6 +3141,7 @@ static const AVOption rtmp_options[] = {
> > {"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
> > {"rtmp_flashver", "Version of the Flash plugin used to run the SWF player.", OFFSET(flashver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
> > {"rtmp_flush_interval", "Number of packets flushed in the same request (RTMPT only).", OFFSET(flush_interval), AV_OPT_TYPE_INT, {.i64 = 10}, 0, INT_MAX, ENC},
> > + {"rtmp_enhanced_codec", "Specify that the codec in enhanced rtmp live stream", OFFSET(enhanced), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC},
>
> I think this should be more like "Specify the codec(s) to use in an
> enhanced rtmp live stream" ?
>
> > {"rtmp_live", "Specify that the media is a live stream.", OFFSET(live), AV_OPT_TYPE_INT, {.i64 = -2}, INT_MIN, INT_MAX, DEC, "rtmp_live"},
> > {"any", "both", 0, AV_OPT_TYPE_CONST, {.i64 = -2}, 0, 0, DEC, "rtmp_live"},
> > {"live", "live stream", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, DEC, "rtmp_live"},
> > --
> > 2.40.0
> >
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I have submitted new version patchset fix these problem:
https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2023-August/313483.html
Thanks
Steven
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