Steven Liu <l...@chinaffmpeg.org> 于2023年8月25日周五 18:05写道：
>
> 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 <l...@chinaffmpeg.org>
> ---
> doc/protocols.texi | 6 ++++++
> libavformat/rtmpproto.c | 37 +++++++++++++++++++++++++++++++++++++
> 2 files changed, 43 insertions(+)
>
> diff --git a/doc/protocols.texi b/doc/protocols.texi
> index b3fad55591..bd2b25e502 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.
>
> +@item rtmp_enhanced_codecs
> +Specify the list of codecs the client advertises to support in an
> +enhanced RTMP stream. This option should set a string like
> @code{hvc1,av01,vp09}
> +for multiple codecs, or @code{hvc1} 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..10e0aed539 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; ///< codec list in enhanced
> rtmp
> char username[50];
> char password[50];
> char auth_params[500];
> @@ -336,6 +337,41 @@ 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_codecs) {
> + uint32_t list_len = 0;
> + char *fourcc_data = rt->enhanced_codecs;
> + int fourcc_str_len = strlen(fourcc_data);
> +
> + // check the string, fourcc + ',' + ... + end fourcc correct length
> should be (4+1)*n+4
> + if ((fourcc_str_len + 1) % 5 != 0) {
> + av_log(s, AV_LOG_ERROR, "Malformed rtmp_enhanched_codecs, "
> + "should be of the form hvc1[,av01][,vp09][,...]\n");
> + 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_start(&p, list_len);
> +
> + while(fourcc_data - rt->enhanced_codecs < fourcc_str_len) {
> + unsigned char fourcc[5];
> + if (!strncasecmp(fourcc_data, "hvc1", 4) ||
> + !strncasecmp(fourcc_data, "av01", 4) ||
> + !strncasecmp(fourcc_data, "vp09", 4)) {
s/strncasecmp/av_strncasecmp/g fix local.
> + av_strlcpy(fourcc, fourcc_data, sizeof(fourcc));
> + ff_amf_write_string(&p, fourcc);
> + } else {
> + av_log(s, AV_LOG_ERROR, "Unsupported codec fourcc,
> %.*s\n", 4, fourcc_data);
> + return AVERROR_PATCHWELCOME;
> + }
> +
> + fourcc_data += 5;
> + }
> + }
> +
> if (!rt->is_input) {
> ff_amf_write_field_name(&p, "type");
> ff_amf_write_string(&p, "nonprivate");
> @@ -3104,6 +3140,7 @@ 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_codecs", "Specify the codec(s) to use in an enhanced
> rtmp live stream", OFFSET(enhanced_codecs), AV_OPT_TYPE_STRING, {.str = NULL
> }, 0, 0, ENC},
> {"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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