Hello,
we are trying to change ffserver.c to open several mpegts raw files and
start streaming them to a Set Top Box than only reads TS packets. We don't
need to demux the files into streams just send them. For this we have
changed the rtp_new_av_stream function as in the solution you give:
static int rtp_new_av_stream(HTTPContext *c,
int stream_index, struct sockaddr_in
*dest_addr,
HTTPContext *rtsp_c)
{
int res=0;
char *ipaddr;
AVFormatContext *tscontext = av_alloc_format_context();
if (!tscontext) return -1;
http_log("Reservamos memoria para tscontext\r\n");
tscontext->oformat = av_guess_format("mpegts",NULL,NULL);
http_log("Despues de guess_format\r\n");
AVStream *fakevideo = 0;
fakevideo = av_new_stream(tscontext,0); //Videostream as
fakeinput
MPEG-TS
http_log("Creamos el fakevideo\r\n");
if (!fakevideo) return -1;
avcodec_get_context_defaults(fakevideo->codec);
fakevideo->codec->codec_id = CODEC_ID_MPEG2TS;
tscontext->audio_codec_id = CODEC_ID_NONE;
tscontext->video_codec_id = CODEC_ID_MPEG2TS;
res = av_set_parameters(tscontext,0);
ipaddr = inet_ntoa(dest_addr->sin_addr);
if (c->stream->is_multicast) {
int ttl;
ttl = c->stream->multicast_ttl;
if (!ttl)
ttl = 16;
snprintf(tscontext->filename, sizeof(tscontext->filename),
"rtp://%s:%d?multicast=1&ttl=%d&pkt_size=1316",
ipaddr, ntohs(dest_addr->sin_port), ttl);
} else {
snprintf(tscontext->filename, sizeof(tscontext->filename),
"rtp://%s:%d?pkt_size=1316", ipaddr,
ntohs(dest_addr->sin_port));
}
if (url_open(&tscontext->pb, tscontext->filename, URL_WRONLY) < 0)
goto fail;
c->rtp_handles[stream_index] = tscontext->pb;
//3. OK to initialize outputs call av_write_header() for both contexts
if (av_write_header(tscontext) < 0) {
fail:
if (tscontext->pb)
url_close(tscontext->pb);
av_free(tscontext);
return -1;
}
c->rtp_ctx[stream_index] = tscontext;
return 0;
}
And we have changed the code where the ffserver is sending packets
(http_preparedata function) like this:
case HTTPSTATE_SEND_DATA:
/* find a new packet */
/* read a packet from the input stream */
if (c->stream->feed)
ffm_set_write_index(c->fmt_in,
c->stream->feed->feed_write_index,
c->stream->feed->feed_size);
if (c->stream->max_time &&
c->stream->max_time + c->start_time - cur_time < 0)
/* We have timed out */
c->state = HTTPSTATE_SEND_DATA_TRAILER;
else {
AVPacket avpkt;
AVPacket tspkt;
AVCodecContext *codec;
uint8_t *videobuf;
uint8_t *destbuff;
int res=0;
int len;
int videobuf_size;
AVStream *ist;
int enc_size =0;
AVFrame *outframe;
ByteIOContext *ioctx;
if (res = url_open_dyn_buf(&ioctx))
{
return -1;
}
c->pb = ioctx;
av_init_packet(&avpkt); // ts-packet
av_init_packet(&tspkt); // rtp-packet
//int source_index = avpkt.stream_index;
ist = c->fmt_in->streams[0];
ctx = c->rtp_ctx[c->packet_stream_index];
if(!ctx) {
av_free_packet(&avpkt);
break;
}
codec = ctx->streams[0]->codec;
avpkt.stream_index = 0;
outframe = alloc_picture(codec->pix_fmt, codec->width,
codec->height);
if (!outframe)
{
exit(1);
}
outframe->interlaced_frame = 1; //if wanted and in
video parameters
defined
outframe->top_field_first = 1;
enc_size = avcodec_encode_video(codec, videobuf
,videobuf_size,outframe);
// encode videoframe
if (enc_size > 0)
{
if (codec->coded_frame->key_frame)
{
avpkt.flags |= PKT_FLAG_KEY;
}
avpkt.size= enc_size;
avpkt.pts =
av_rescale_q(codec->coded_frame->pts,
codec->time_base, ist->time_base);
avpkt.stream_index= ist->index;
avpkt.data= videobuf;
// write into the dyn_buf (ts-context)
ret = av_interleaved_write_frame(c, &avpkt);
//close the buffer to read the bytes
len = url_close_dyn_buf(ioctx, &destbuff);
//prepare the packet for rtp
tspkt.size = len;
tspkt.data = destbuff;
//write to output , not sure if _interleaved_
is the right call
av_interleaved_write_frame(ctx, &tspkt);
av_free(destbuff);
//open new buffer for the next frame
if (res = url_open_dyn_buf(&ioctx))
{
return -1;
}
}
av_free_packet(&avpkt);
av_free_packet(&tspkt);
Can anyone help us to make this work? We have spent a lot of time trying to
send ts packets to the STB and don't know what are we doing wrong.
Thank you very much
Kind regards
--
View this message in context:
http://libav-users.943685.n4.nabble.com/Output-mpeg-ts-to-rtp-tp2234066p3263370.html
Sent from the libav-users mailing list archive at Nabble.com.
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
