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Issue while writing a RTSP client

From: Harshdeep Singh <harshcalsoft_at_gmail.com>
Date: Wed, 4 Aug 2010 11:22:18 +0530

Hi,
I am writing a RTSP client program. I am having trouble getting the
program to receive RTP packets Plz can anybody help in resolving this issue.
How can i make my program to receive RTP packets. I tried using the
CURL_RTSPREQ_RECEIVE
option but it is waiting for a minute then any command after that is
returning response code of 405 and no RTP packets are received. Thanks in
advance. The code looks like this (I am using Live555 as a RTSP server):

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <curl/curl.h>

static size_t rtp_write(void *ptr, size_t size, size_t nmemb, void *stream){
  printf("Size is: %d\n",size);
  printf("Nmemb is: %d\n",nmemb);
  return size*nmemb;
}

int main(int argc, char *argv[])
{
  CURL *csession;
  CURLcode res;
  struct curl_slist *custom_msg = NULL;

  char URL[256];
  char temp_URL[256];
  char request[256];
  long rc;
  int port = 48000;
  FILE * protofile = NULL;
  protofile = fopen("Dump","wb");
  if (argc < 2)
  {
      fprintf (stderr, "ERROR: enter a valid URL\n");
      return -1;
  }

csession = curl_easy_init();

  if (csession == NULL)
      return -1;
  printf("%s\n", argv[1]);
  sprintf (URL, "%s", argv[1]);

  curl_easy_setopt(csession, CURLOPT_URL, URL);
  curl_easy_setopt(csession, CURLOPT_RTSP_STREAM_URI, URL);
  curl_easy_setopt(csession, CURLOPT_FOLLOWLOCATION, 1);
  curl_easy_setopt(csession, CURLOPT_HEADER, 1);
  curl_easy_setopt(csession, CURLOPT_INTERLEAVEFUNCTION, rtp_write);
  curl_easy_setopt(csession, CURLOPT_INTERLEAVEDATA, protofile);
  //curl_easy_setopt(csession, CURLOPT_RANGE, NULL);
  curl_easy_setopt(csession, CURLOPT_VERBOSE, 1);

  /** retrieve OPTIONS */
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_OPTIONS);
  res = curl_easy_perform(csession);
  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);
  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "OPTIONS Response Code: %ld\n\n", rc);
  }
  else
      return -1;

  /** send DESCRIBE */
  custom_msg = curl_slist_append(custom_msg, "Accept: application/x-rtsp-mh,
application/rtsl, application/sdp");
  curl_easy_setopt(csession, CURLOPT_RTSPHEADER, custom_msg);
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_DESCRIBE);
  res = curl_easy_perform(csession);

  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);
  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "DESCRIBE Response Code: %ld\n\n", rc);
  }
  else
      return -1;

  /** send SETUP */
  sprintf(temp_URL, "%s/track1", URL);
  printf("%s\n",temp_URL);
  curl_easy_setopt(csession, CURLOPT_RTSP_STREAM_URI, temp_URL);
  sprintf (request, "RTP/AVP;unicast;client_port=%d", port);
  curl_easy_setopt(csession, CURLOPT_RTSP_TRANSPORT, request);
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_SETUP);
  res = curl_easy_perform(csession);
  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);

  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "SETUP Response Code: %ld\n\n", rc);
  }
  else
      return -1;

  sprintf(temp_URL, "%s/track2", URL);
  printf("%s\n",temp_URL);
  curl_easy_setopt(csession, CURLOPT_RTSP_STREAM_URI, temp_URL);
  sprintf (request, "RTP/AVP;unicast;client_port=%d", port);
  curl_easy_setopt(csession, CURLOPT_RTSP_TRANSPORT, request);
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_SETUP);
  res = curl_easy_perform(csession);
  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);

  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "SETUP Response Code: %ld\n\n", rc);
  }
  else
      return -1;

  /** send PLAY */
  curl_easy_setopt(csession, CURLOPT_RTSP_STREAM_URI, URL);
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_PLAY);
  res = curl_easy_perform(csession);

  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);
  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "PLAY Response Code: %ld\n\n", rc);
  }
  else
      return -1;

//curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_RECEIVE);

//res = curl_easy_perform(csession);

  /** send GET_PARAMETER */
  /** send TEARDOWN */
  curl_easy_setopt(csession, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_TEARDOWN);
  res = curl_easy_perform(csession);

  res = curl_easy_getinfo(csession, CURLINFO_RESPONSE_CODE, &rc);
  if((res == CURLE_OK) && rc)
  {
      fprintf(stderr, "TEARDOWN Response Code: %ld\n\n", rc);
  }
  else
      return -1;

  curl_easy_cleanup(csession);
  fclose(protofile);
  return 0;
}

The output is:

[root_at_FC138 rtsp]# ./test rtsp://192.168.7.32/vobStream
rtsp://192.168.7.32/vobStream
* About to connect() to 192.168.7.32 port 554 (#0)
* Trying 192.168.7.32... * connected
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> OPTIONS rtsp://192.168.7.32/vobStream RTSP/1.0
CSeq: 1

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 1
CSeq: 1
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT
< Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER,
SET_PARAMETER
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER,
SET_PARAMETER

<
* Connection #0 to host 192.168.7.32 left intact
OPTIONS Response Code: 200

* Re-using existing connection! (#0) with host 192.168.7.32
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> DESCRIBE rtsp://192.168.7.32/vobStream RTSP/1.0
CSeq: 2
If-Modified-Since: Thu, 01 Jan 1970 00:00:00 GMT
Accept: application/x-rtsp-mh, application/rtsl, application/sdp

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 2
CSeq: 2
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT
< Content-Base: rtsp://192.168.7.32/vobStream/
Content-Base: rtsp://192.168.7.32/vobStream/
< Content-Type: application/sdp
Content-Type: application/sdp
< Content-Length: 566
Content-Length: 566
<
v=0
o=- 1280916789179493 1 IN IP4 192.168.7.32
s=Session streamed by "vobStreamer"
i=/root/media/VTS_01_1.VOB
t=0 0
a=tool:LIVE555 Streaming Media v2010.07.13
a=type:broadcast
a=control:*
a=source-filter: incl IN IP4 * 192.168.7.32
a=rtcp-unicast: reflection
a=range:npt=0-
a=x-qt-text-nam:Session streamed by "vobStreamer"
a=x-qt-text-inf:/root/media/VTS_01_1.VOB
m=audio 4444 RTP/AVP 96
c=IN IP4 232.104.202.61/255
b=AS:160
a=rtpmap:96 AC3/48000
a=control:track1
m=video 8888 RTP/AVP 32
c=IN IP4 232.104.202.61/255
b=AS:4500
a=control:track2
* Connection #0 to host 192.168.7.32 left intact
DESCRIBE Response Code: 200

rtsp://192.168.7.32/vobStream/track1
* Re-using existing connection! (#0) with host 192.168.7.32
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> SETUP rtsp://192.168.7.32/vobStream/track1 RTSP/1.0
CSeq: 3
Transport: RTP/AVP;unicast;client_port=48000
If-Modified-Since: Thu, 01 Jan 1970 00:00:00 GMT
Accept: application/x-rtsp-mh, application/rtsl, application/sdp

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 3
CSeq: 3
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT
< Transport:
RTP/AVP;multicast;destination=232.104.202.61;source=192.168.7.32;port=4444-4445;ttl=255
Transport:
RTP/AVP;multicast;destination=232.104.202.61;source=192.168.7.32;port=4444-4445;ttl=255
< Session: 07DA6D44
Session: 07DA6D44

<
* Connection #0 to host 192.168.7.32 left intact
SETUP Response Code: 200

rtsp://192.168.7.32/vobStream/track2
* Re-using existing connection! (#0) with host 192.168.7.32
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> SETUP rtsp://192.168.7.32/vobStream/track2 RTSP/1.0
CSeq: 4
Session: 07DA6D44
Transport: RTP/AVP;unicast;client_port=48000
If-Modified-Since: Thu, 01 Jan 1970 00:00:00 GMT
Accept: application/x-rtsp-mh, application/rtsl, application/sdp

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 4
CSeq: 4
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT
< Transport:
RTP/AVP;multicast;destination=232.104.202.61;source=192.168.7.32;port=8888-8889;ttl=255
Transport:
RTP/AVP;multicast;destination=232.104.202.61;source=192.168.7.32;port=8888-8889;ttl=255
< Session: 07DA6D44
Session: 07DA6D44

<
* Connection #0 to host 192.168.7.32 left intact
SETUP Response Code: 200

* Re-using existing connection! (#0) with host 192.168.7.32
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> PLAY rtsp://192.168.7.32/vobStream RTSP/1.0
CSeq: 5
Session: 07DA6D44
Accept: application/x-rtsp-mh, application/rtsl, application/sdp

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 5
CSeq: 5
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT
< Session: 07DA6D44
Session: 07DA6D44
< RTP-Info: url=rtsp://
192.168.7.32/vobStream/track1;seq=39869;rtptime=165007425,url=rtsp://192.168.7.32/vobStream/track2;seq=57787;rtptime=2778271849
RTP-Info: url=rtsp://
192.168.7.32/vobStream/track1;seq=39869;rtptime=165007425,url=rtsp://192.168.7.32/vobStream/track2;seq=57787;rtptime=2778271849

<
* Connection #0 to host 192.168.7.32 left intact
PLAY Response Code: 200

* Re-using existing connection! (#0) with host 192.168.7.32
* Connected to 192.168.7.32 (192.168.7.32) port 554 (#0)
> TEARDOWN rtsp://192.168.7.32/vobStream RTSP/1.0
CSeq: 6
Session: 07DA6D44
Accept: application/x-rtsp-mh, application/rtsl, application/sdp

< RTSP/1.0 200 OK
RTSP/1.0 200 OK
< CSeq: 6
CSeq: 6
< Date: Wed, Aug 04 2010 11:14:25 GMT
Date: Wed, Aug 04 2010 11:14:25 GMT

<
* Connection #0 to host 192.168.7.32 left intact
TEARDOWN Response Code: 200

* Closing connection #0

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Received on 2010-08-04

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