added reframer_ts_vtt filter.

include/gpac/internal/media_dev.h

@@ -1128,6 +1128,15 @@ void gf_media_format_ttxt_sdp(GP_RTPPacketizer *builder, char *payload_name, cha
 
 
 #ifndef GPAC_DISABLE_VTT
+#include <gpac/webvtt.h>
+
+typedef enum {
+	WEBVTT_PARSER_STATE_WAITING_SIGNATURE,
+	WEBVTT_PARSER_STATE_WAITING_HEADER,
+	WEBVTT_PARSER_STATE_WAITING_CUE,
+	WEBVTT_PARSER_STATE_WAITING_CUE_TIMESTAMP,
+	WEBVTT_PARSER_STATE_WAITING_CUE_PAYLOAD
+} GF_WebVTTParserState;
 
 typedef struct _webvtt_parser GF_WebVTTParser;
 typedef struct _webvtt_sample GF_WebVTTSample;
@@ -1141,11 +1150,11 @@ GF_Err gf_webvtt_parser_parse(GF_WebVTTParser *parser);
 void gf_webvtt_parser_del(GF_WebVTTParser *parser);
 void gf_webvtt_parser_suspend(GF_WebVTTParser *vttparser);
 void gf_webvtt_parser_restart(GF_WebVTTParser *parser);
+void gf_webvtt_parser_force_state(GF_WebVTTParser *parser, GF_WebVTTParserState state);
 GF_Err gf_webvtt_parser_parse_payload(GF_WebVTTParser *parser, u64 start, u64 end, const char *vtt_pre, const char *vtt_cueid, const char *vtt_settings);
 GF_Err gf_webvtt_parser_flush(GF_WebVTTParser *parser);
 GF_Err gf_webvtt_parser_parse_ext(GF_WebVTTParser *parser, FILE *ext_file, Bool in_eos);
 
-#include <gpac/webvtt.h>
 void gf_webvtt_parser_cue_callback(GF_WebVTTParser *parser, void (*on_cue_read)(void *, GF_WebVTTCue *), void *udta);
 GF_Err gf_webvtt_merge_cues(GF_WebVTTParser *parser, u64 start, GF_List *cues);
 GF_Err gf_webvtt_parser_finalize(GF_WebVTTParser *parser, u64 duration);

include/gpac/mpegts.h

@@ -56,6 +56,7 @@ extern "C" {
 enum {
 	GF_M2TS_META_ID3 	= GF_4CC('I','D','3',' '),
 	GF_M2TS_META_KLVA 	= GF_4CC('K','L','V','A'),
+	GF_M2TS_META_WVTT 	= GF_4CC('W','V','T','T'),
 };
 
 
@@ -298,6 +299,7 @@ typedef enum
 	GF_M2TS_DVB_SUBTITLE				= 0x154,
 	GF_M2TS_METADATA_ID3_HLS			= 0x155,
 	GF_M2TS_METADATA_ID3_KLVA			= 0x156,
+	GF_M2TS_METADATA_WVTT				= 0x157,
 
 } GF_M2TSStreamType;
 

src/Makefile

@@ -215,7 +215,7 @@ endif
 SCENEGRAPH_CFLAGS=
 MEDIATOOLS_CFLAGS=
 
-LIBGPAC_FILTERS+=filters/bs_agg.o filters/bs_split.o filters/bsrw.o filters/compose.o filters/dasher.o filters/dec_ac52.o filters/dec_bifs.o filters/dec_faad.o filters/dec_img.o filters/dec_j2k.o filters/dec_laser.o filters/dec_mad.o filters/dec_mediacodec.o filters/dec_nvdec.o filters/dec_nvdec_sdk.o filters/dec_odf.o filters/dec_theora.o filters/dec_ttml.o filters/dec_ttxt.o filters/dec_uncv.o filters/dec_vorbis.o filters/dec_vtb.o filters/dec_webvtt.o filters/dec_xvid.o filters/decrypt_cenc_isma.o filters/dmx_avi.o filters/dmx_dash.o filters/dmx_ghi.o  filters/dmx_gsf.o filters/dmx_m2ts.o filters/dmx_mpegps.o filters/dmx_nhml.o filters/dmx_nhnt.o filters/dmx_ogg.o filters/dmx_saf.o filters/dmx_vobsub.o filters/enc_jpg.o filters/enc_png.o filters/encrypt_cenc_isma.o filters/evg_rescale.o filters/filelist.o filters/hevcmerge.o filters/hevcsplit.o filters/in_dvb4linux.o filters/in_file.o filters/in_http.o filters/in_pipe.o filters/in_route.o filters/in_route_repair.o filters/in_rtp.o filters/in_rtp_rtsp.o filters/in_rtp_sdp.o filters/in_rtp_signaling.o filters/in_rtp_stream.o filters/in_sock.o filters/inspect.o filters/io_fcryp.o filters/isoffin_load.o filters/isoffin_read.o filters/isoffin_read_ch.o filters/jsfilter.o filters/load_bt_xmt.o filters/load_svg.o filters/load_text.o filters/mux_avi.o filters/mux_gsf.o filters/mux_isom.o filters/mux_ts.o filters/mux_ogg.o filters/out_audio.o  filters/out_file.o filters/out_http.o filters/out_pipe.o filters/out_route.o filters/out_rtp.o filters/out_rtsp.o filters/out_sock.o filters/out_video.o filters/reframer.o filters/reframe_ac3.o filters/reframe_adts.o filters/reframe_latm.o filters/reframe_amr.o filters/reframe_av1.o filters/reframe_flac.o filters/reframe_h263.o filters/reframe_img.o filters/reframe_mhas.o filters/reframe_mp3.o filters/reframe_mpgvid.o filters/reframe_nalu.o filters/reframe_prores.o filters/reframe_qcp.o filters/reframe_rawvid.o filters/reframe_rawpcm.o filters/reframe_truehd.o filters/resample_audio.o filters/restamp.o  filters/tileagg.o filters/tilesplit.o filters/tssplit.o filters/ttml_conv.o filters/unit_test_filter.o filters/rewind.o filters/rewrite_adts.o filters/rewrite_mhas.o filters/rewrite_mp4v.o filters/rewrite_nalu.o filters/rewrite_obu.o filters/vflip.o filters/vcrop.o filters/write_generic.o filters/write_nhml.o filters/write_nhnt.o filters/write_qcp.o filters/write_tx3g.o filters/write_vtt.o ../modules/dektec_out/dektec_video_decl.o filters/dec_opensvc.o filters/unframer.o filters/dec_scte35.o
+LIBGPAC_FILTERS+=filters/bs_agg.o filters/bs_split.o filters/bsrw.o filters/compose.o filters/dasher.o filters/dec_ac52.o filters/dec_bifs.o filters/dec_faad.o filters/dec_img.o filters/dec_j2k.o filters/dec_laser.o filters/dec_mad.o filters/dec_mediacodec.o filters/dec_nvdec.o filters/dec_nvdec_sdk.o filters/dec_odf.o filters/dec_theora.o filters/dec_ttml.o filters/dec_ttxt.o filters/dec_uncv.o filters/dec_vorbis.o filters/dec_vtb.o filters/dec_webvtt.o filters/dec_xvid.o filters/decrypt_cenc_isma.o filters/dmx_avi.o filters/dmx_dash.o filters/dmx_ghi.o  filters/dmx_gsf.o filters/dmx_m2ts.o filters/dmx_mpegps.o filters/dmx_nhml.o filters/dmx_nhnt.o filters/dmx_ogg.o filters/dmx_saf.o filters/dmx_vobsub.o filters/enc_jpg.o filters/enc_png.o filters/encrypt_cenc_isma.o filters/evg_rescale.o filters/filelist.o filters/hevcmerge.o filters/hevcsplit.o filters/in_dvb4linux.o filters/in_file.o filters/in_http.o filters/in_pipe.o filters/in_route.o filters/in_route_repair.o filters/in_rtp.o filters/in_rtp_rtsp.o filters/in_rtp_sdp.o filters/in_rtp_signaling.o filters/in_rtp_stream.o filters/in_sock.o filters/inspect.o filters/io_fcryp.o filters/isoffin_load.o filters/isoffin_read.o filters/isoffin_read_ch.o filters/jsfilter.o filters/load_bt_xmt.o filters/load_svg.o filters/load_text.o filters/mux_avi.o filters/mux_gsf.o filters/mux_isom.o filters/mux_ts.o filters/mux_ogg.o filters/out_audio.o  filters/out_file.o filters/out_http.o filters/out_pipe.o filters/out_route.o filters/out_rtp.o filters/out_rtsp.o filters/out_sock.o filters/out_video.o filters/reframer.o filters/reframe_ac3.o filters/reframe_adts.o filters/reframe_latm.o filters/reframe_amr.o filters/reframe_av1.o filters/reframe_flac.o filters/reframe_h263.o filters/reframe_img.o filters/reframe_mhas.o filters/reframe_mp3.o filters/reframe_mpgvid.o filters/reframe_nalu.o filters/reframe_prores.o filters/reframe_qcp.o filters/reframe_rawvid.o filters/reframe_rawpcm.o filters/reframe_truehd.o filters/resample_audio.o filters/restamp.o  filters/tileagg.o filters/tilesplit.o filters/tssplit.o filters/ttml_conv.o filters/unit_test_filter.o filters/rewind.o filters/rewrite_adts.o filters/rewrite_mhas.o filters/rewrite_mp4v.o filters/rewrite_nalu.o filters/rewrite_obu.o filters/vflip.o filters/vcrop.o filters/write_generic.o filters/write_nhml.o filters/write_nhnt.o filters/write_qcp.o filters/write_tx3g.o filters/reframe_ts_wvtt.o filters/write_vtt.o ../modules/dektec_out/dektec_video_decl.o filters/dec_opensvc.o filters/unframer.o filters/dec_scte35.o
 LIBGPAC_FILTERS_FFMPEG=filters/ff_common.o filters/ff_avf.o filters/ff_dec.o filters/ff_dmx.o filters/ff_enc.o filters/ff_rescale.o filters/ff_mx.o filters/ff_bsf.o
 LIBGPAC_FILTERS_LIBCAPTION=filters/dec_cc.o
 LIBGPAC_FILTERS_MPEGHDEC=filters/dec_mpeghdec.o

src/filter_core/filter_register.c

@@ -103,6 +103,7 @@ REG_DEC(writegen)
 REG_DEC(ufnalu)
 REG_DEC(writeqcp)
 REG_DEC(ufvtt)
+REG_DEC(rftsvtt)
 REG_DEC(nhntw)
 REG_DEC(nhmlw)
 REG_DEC(vobsubdmx)
@@ -205,7 +206,7 @@ typedef struct
 
 #define REG_IT(__n) { #__n , __n##_register }
 
-BuiltinReg BuiltinFilters [] = {
+BuiltinReg BuiltinFilters[] = {
 	REG_IT(inspect),
 	REG_IT(probe),
 	REG_IT(compositor),
@@ -270,6 +271,7 @@ BuiltinReg BuiltinFilters [] = {
 	REG_IT(ufnalu),
 	REG_IT(writeqcp),
 	REG_IT(ufvtt),
+	REG_IT(rftsvtt),
 	REG_IT(nhntw),
 	REG_IT(nhmlw),
 	REG_IT(vobsubdmx),

src/filters/dmx_m2ts.c

@@ -421,6 +421,11 @@ static void m2tsdmx_declare_pid(GF_M2TSDmxCtx *ctx, GF_M2TS_PES *stream, GF_ESD
 			//fallthrough
 		case GF_M2TS_SCTE35_SPLICE_INFO_SECTIONS:
 			return; //ignore actively: these streams will be attached verbatim as properties to audio and/or video packets
+		case GF_M2TS_METADATA_WVTT:
+			stype = GF_STREAM_TEXT;
+			codecid = GF_M2TS_META_WVTT;
+			stream->flags |= GF_M2TS_ES_FULL_AU;
+			break;
 		default:
 			GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("[M2TSDmx] Stream type 0x%02X not supported - ignoring pid\n", stream->stream_type));
 			return;
@@ -431,13 +436,15 @@ static void m2tsdmx_declare_pid(GF_M2TSDmxCtx *ctx, GF_M2TS_PES *stream, GF_ESD
 	for (i=0; i<gf_filter_get_opid_count(ctx->filter); i++) {
 		opid = gf_filter_get_opid(ctx->filter, i);
 		const GF_PropertyValue *p = gf_filter_pid_get_property(opid, GF_PROP_PID_ID);
-		if (p && (p->value.uint == stream->pid))
+		if (p && (p->value.uint == stream->pid)) {
 			break;
+		}
 		opid = NULL;
 	}
 
-	if (!opid)
+	if (!opid) {
 		opid = gf_filter_pid_new(ctx->filter);
+	}
 
 	stream->user = opid;
 	stream->flags |= GF_M2TS_ES_ALREADY_DECLARED;
@@ -591,7 +598,6 @@ static void m2tsdmx_declare_pid(GF_M2TSDmxCtx *ctx, GF_M2TS_PES *stream, GF_ESD
 	}
 
 	m2tsdmx_update_sdt(ctx->ts, opid);
-
 	gf_m2ts_set_pes_framing((GF_M2TS_PES *)stream, GF_M2TS_PES_FRAMING_DEFAULT);
 }
 
@@ -745,7 +751,10 @@ static void m2tsdmx_send_packet(GF_M2TSDmxCtx *ctx, GF_M2TS_PES_PCK *pck)
 
 	/*pcr not initialized, don't send any data*/
 //	if (! pck->stream->program->first_dts) return;
-	if (!pck->stream->user) return;
+
+	if (!pck->stream->user) {
+		return;
+	}
 	opid = pck->stream->user;
 
 	u8 *ptr = pck->data;
@@ -795,6 +804,8 @@ static void m2tsdmx_send_packet(GF_M2TSDmxCtx *ctx, GF_M2TS_PES_PCK *pck)
 	}
 
 
+	// if (pck->stream->pid == 65) GF_LOG(GF_LOG_ERROR, GF_LOG_CONDITION, ("m2tsdmx_send_packet: creating packet %llu\n", len));
+
 	dst_pck = gf_filter_pck_new_alloc(opid, len, &data);
 	if (!dst_pck) return;
 	memcpy(data, ptr, len);
@@ -1337,8 +1348,11 @@ static GF_Err m2tsdmx_configure_pid(GF_Filter *filter, GF_FilterPid *pid, Bool i
 		}
 		return GF_OK;
 	}
-	if (! gf_filter_pid_check_caps(pid))
+
+	if (! gf_filter_pid_check_caps(pid)) {
+		GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("[M2TSDMx] caps not supported \"%s\"\n", gf_filter_pid_get_name(pid)));
 		return GF_NOT_SUPPORTED;
+	}	
 
 	//by default for all URLs, send packets as soon as the program is configured
 	ctx->mux_tune_state = DMX_TUNE_DONE;

src/filters/reframe_ts_wvtt.c

@@ -0,0 +1,233 @@
+#include <gpac/filters.h>
+#include <gpac/constants.h>
+#include <gpac/bitstream.h>
+#include <gpac/webvtt.h>
+#include <gpac/mpegts.h>
+#include <gpac/internal/media_dev.h>
+#include <gpac/internal/isomedia_dev.h>
+
+#include <stdio.h>
+
+#ifndef GPAC_DISABLE_VTT
+
+
+#define REFRAME_TS_WVTT_DEFAULT_TIMESCALE 90000
+
+///////////////////////////////////////////////////////////////////////////////
+
+typedef struct
+{
+    u32 timescale;
+    GF_FilterPid *ipid;
+    GF_FilterPid *opid;
+} GF_ReframeTsVttCtx;
+
+///////////////////////////////////////////////////////////////////////////////
+// Callbacks for WebVTT parser
+
+static GF_Err reframe_ts_wvtt_parse_callback_report(void *user, GF_Err e, char *message, const char *line) {
+    GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("reframe_ts_wvtt_parse_callback_report: line: %s, message: %s\n", line, message));
+    return e;
+}
+
+static void reframe_ts_wvtt_parse_callback_header(void *user, const char *config)
+{
+    // nothing to do
+}
+
+static void reframe_ts_wvtt_parse_callback_sample(void *user, GF_WebVTTSample *sample) {
+
+    if (!sample) {
+        return;
+    }
+
+    // in milliseconds
+    u64 start = gf_webvtt_sample_get_start(sample);
+    u64 end = gf_webvtt_sample_get_end(sample);
+
+    if (!gf_isom_webvtt_cues_count(sample)) {
+        return;
+    }
+
+    GF_ISOSample *iso_sample = NULL;
+    iso_sample = gf_isom_webvtt_to_sample(sample);
+
+    if (iso_sample) {
+        GF_ReframeTsVttCtx* ctx = (GF_ReframeTsVttCtx*) user;
+        GF_FilterPacket *pck;
+        u8 *pck_data;
+
+        pck = gf_filter_pck_new_alloc(ctx->opid, iso_sample->dataLength, &pck_data);
+        if (pck)
+        {
+            memcpy(pck_data, iso_sample->data, iso_sample->dataLength);
+            gf_filter_pck_set_cts(pck, (u64)(ctx->timescale * start / 1000));
+            gf_filter_pck_set_sap(pck, GF_FILTER_SAP_1);
+
+            if (end && (end >= start))
+            {
+                gf_filter_pck_set_duration(pck, (u32)(ctx->timescale * (end - start) / 1000));
+            }
+            gf_filter_pck_send(pck);
+        }
+
+        gf_isom_sample_del(&iso_sample);
+    }
+
+    gf_webvtt_sample_del(sample);
+}
+
+static void reframe_ts_wvtt_cue_callback(void *user, GF_WebVTTCue *cue) {
+    // nothing to do
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Filter callbacks
+
+static GF_Err reframe_ts_wvtt_initialize(GF_Filter *filter)
+{
+    return GF_OK;
+}
+
+GF_Err reframe_ts_wvtt_configure_pid(GF_Filter *filter, GF_FilterPid *pid, Bool is_remove)
+{
+    GF_ReframeTsVttCtx *ctx = gf_filter_get_udta(filter);
+
+    if (is_remove)
+    {
+        GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("reframe_ts_wvtt_configure_pid: is_remove\n"));
+        ctx->ipid = NULL;
+        if (ctx->opid) {
+            gf_filter_pid_remove(ctx->opid);
+            ctx->opid = NULL;
+        }
+        return GF_OK;
+    }
+
+    if (!gf_filter_pid_check_caps(pid)) {
+        GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("reframe_ts_wvtt_configure_pid: not supported\n"));
+        return GF_NOT_SUPPORTED;
+    }
+
+    GF_PropertyValue *p = gf_filter_pid_get_property(pid, GF_PROP_PID_CODECID);
+    if (!p) {
+        GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("reframe_ts_wvtt_configure_pid: no codec id\n"));
+        return GF_NOT_SUPPORTED;
+    }
+
+    char *pid_name = gf_filter_pid_get_name(pid);
+
+    GF_PropertyValue* timescale = gf_filter_pid_get_property(pid, GF_PROP_PID_TIMESCALE);
+    if (!timescale) {
+        GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("reframe_ts_wvtt_configure_pid: no timescale using default value\n"));
+        ctx->timescale = REFRAME_TS_WVTT_DEFAULT_TIMESCALE;
+    } else {
+        ctx->timescale = timescale->value.uint;
+    }
+
+    ctx->ipid = pid;
+    ctx->opid = gf_filter_pid_new(filter);
+
+    // configure output PID properties
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DECODER_CONFIG, &PROP_DATA((u8 *)"WEBVTT", 7));
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_MIME, &PROP_DATA((u8 *)"text/vtt", 9));
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_STREAM_TYPE, &PROP_UINT(GF_STREAM_TEXT));
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_CODECID, &PROP_UINT(GF_CODECID_WEBVTT));
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_UNFRAMED, &PROP_BOOL(GF_FALSE));
+    gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_TIMESCALE, &PROP_UINT(ctx->timescale));
+
+    return GF_OK;
+}
+
+GF_Err reframe_ts_wvtt_process(GF_Filter *filter)
+{
+    GF_ReframeTsVttCtx *ctx = gf_filter_get_udta(filter);
+    GF_FilterPacket *pck = NULL;
+    u32 pck_size;
+    u8 *pck_data = NULL;
+    // u64 start_ts, end_ts;
+
+    // GF_List *cues;
+    // Bool keep_ref = GF_TRUE;
+
+    pck = gf_filter_pid_get_packet(ctx->ipid);
+    if (!pck) {
+        if (gf_filter_pid_is_eos(ctx->ipid)) {
+            gf_filter_pid_set_eos(ctx->opid);
+            return GF_EOS;
+        }
+        return GF_OK;
+    }
+
+    pck_data = (char *)gf_filter_pck_get_data(pck, &pck_size);
+    // GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("reframe_ts_wvtt_process: len %d\n", pck_size));
+
+
+    ///////////////////////////////////////////////////////
+    GF_WebVTTParser *parser = gf_webvtt_parser_new();
+
+    // create a memory file to read the packet data
+    FILE *mem_file = fmemopen(pck_data, pck_size, "r");
+
+    // Assume UTF-8 encoding
+    gf_webvtt_parser_init(parser, mem_file, 0, GF_FALSE, ctx,  reframe_ts_wvtt_parse_callback_report, reframe_ts_wvtt_parse_callback_sample, reframe_ts_wvtt_parse_callback_header);
+
+    // as the input packets do not contain the WEBVTT signature at the beginning
+    // we have to force the parser to start looking for cues immediately
+    gf_webvtt_parser_force_state(parser, WEBVTT_PARSER_STATE_WAITING_CUE);
+
+    // the parser will call reframe_ts_wvtt_parse_callback_sample for each sample found
+    gf_webvtt_parser_parse(parser);
+    gf_webvtt_parser_del(parser);
+
+    ///////////////////////////////////////////////////////
+    // cleanup
+    gf_filter_pid_drop_packet(ctx->ipid);
+    fclose(mem_file);
+
+    return GF_OK;
+}
+
+static void reframe_ts_wvtt_finalize(GF_Filter *filter)
+{
+    // nothing to do
+}
+
+static const GF_FilterCapability ReframeTsVttCaps[] =
+    {
+        // receive a text stream using the custom 4CC code for WVTT in TS
+        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_TEXT),
+        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_CODECID, GF_M2TS_META_WVTT),
+
+        // then, produce a Metadata stream with WebVTT cues
+        CAP_UINT(GF_CAPS_OUTPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_TEXT),
+        CAP_UINT(GF_CAPS_OUTPUT, GF_PROP_PID_CODECID, GF_CODECID_WEBVTT),
+        CAP_BOOL(GF_CAPS_OUTPUT, GF_PROP_PID_UNFRAMED, GF_FALSE),
+        {0},
+};
+
+#define OFFS(_n) #_n, offsetof(GF_ReframeTsVttCtx, _n)
+
+GF_FilterRegister ReframeTsWebVTT = {
+    .name = "rftsvtt",
+    GF_FS_SET_DESCRIPTION("Reframer for WebVTT subtitles in Transport Stream")
+    GF_FS_SET_HELP("Transform Transport Stream PES metadata content to WebVTT cues")
+    .private_size = sizeof(GF_ReframeTsVttCtx),
+    .initialize = reframe_ts_wvtt_initialize,
+    .finalize = reframe_ts_wvtt_finalize,
+    SETCAPS(ReframeTsVttCaps),
+    .configure_pid = reframe_ts_wvtt_configure_pid,
+    .process = reframe_ts_wvtt_process};
+
+const GF_FilterRegister *rftsvtt_register(GF_FilterSession *session)
+{
+    return &ReframeTsWebVTT;
+}
+#else
+const GF_FilterRegister *rftsvtt_register(GF_FilterSession *session)
+{
+    return NULL;
+}
+
+#endif /*GPAC_DISABLE_VTT*/