mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 02:01:12 +00:00
Fixed the MPEG2 to MPEG1 recoder, we need cannot create dangling elements with the current scheduler. Remove the subt...
Original commit message from CVS: Fixed the MPEG2 to MPEG1 recoder, we need cannot create dangling elements with the current scheduler. Remove the subtitle parser because it's not possible with the current scheduler. Added a padtemplate for MPEG2 subtitles.
This commit is contained in:
Wim Taymans
parent
bd021a5384
commit
a76f5340e3
2 changed files with 51 additions and 39 deletions
|
|
@ -1,6 +1,16 @@
|
|||
<chapter id="cha-dynamic">
|
||||
<title>Dynamic pipelines</title>
|
||||
<para>
|
||||
this chapter we will see how you can create a dynamic pipleine. A dynamic
|
||||
pipeline is a pipeline that is updated or created while media is flowing
|
||||
through it. We will create a partial pipeline first and add more elements
|
||||
while the pipeline is playing. Dynamic pipelines cause all sorts of
|
||||
scheduling issues and will remain a topic of research for a long time in
|
||||
GStreamer.
|
||||
</para>
|
||||
<para>
|
||||
We will show how to create an mpeg1 video player using the dynamic pipeline
|
||||
|
||||
</para>
|
||||
|
||||
</chapter>
|
||||
|
|
|
|||
|
|
@ -6,20 +6,43 @@
|
|||
#include <glib.h>
|
||||
#include <gst/gst.h>
|
||||
|
||||
GstElement *mux;
|
||||
GstElement *merge_subtitles;
|
||||
static GstElement *mux = NULL;
|
||||
static GstElement *merge_subtitles;
|
||||
static GstElement *fdsink;
|
||||
|
||||
void eof(GstElement *src) {
|
||||
static void
|
||||
eof(GstElement *src)
|
||||
{
|
||||
g_print("have eos, quitting\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
||||
static GstPad*
|
||||
create_muxer (GstElement *pipeline, gchar *type, gchar *number)
|
||||
{
|
||||
if (!mux) {
|
||||
mux = gst_elementfactory_make("system_encode","mux");
|
||||
g_return_val_if_fail(mux != NULL, NULL);
|
||||
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(mux));
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(fdsink));
|
||||
gst_pad_connect(gst_element_get_pad(mux,"src"),
|
||||
gst_element_get_pad(fdsink,"sink"));
|
||||
}
|
||||
gtk_object_set(GTK_OBJECT(mux), type, number,NULL);
|
||||
|
||||
return gst_element_get_pad(mux,g_strconcat (type, "_", number, NULL));
|
||||
}
|
||||
|
||||
static void
|
||||
mp2tomp1 (GstElement *parser, GstPad *pad, GstElement *pipeline)
|
||||
{
|
||||
GstElement *parse_audio, *parse_video, *decode, *decode_video, *play, *encode, *audio_resample;
|
||||
GstElement *smooth, *median;
|
||||
GstElement *audio_queue, *video_queue;
|
||||
GstElement *audio_thread, *video_thread;
|
||||
GstElement *videoscale, *audio_encode;
|
||||
GstPad *muxerpad;
|
||||
|
||||
g_print("***** a new pad %s was created\n", gst_pad_get_name(pad));
|
||||
gst_element_set_state(GST_ELEMENT(pipeline),GST_STATE_PAUSED);
|
||||
|
|
@ -27,10 +50,6 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
// connect to audio pad
|
||||
//if (0) {
|
||||
if (strncmp(gst_pad_get_name(pad), "private_stream_1.0", 18) == 0) {
|
||||
gst_plugin_load("ac3parse");
|
||||
gst_plugin_load("ac3dec");
|
||||
gst_plugin_load("audioscale");
|
||||
gst_plugin_load("mpegaudio");
|
||||
// construct internal pipeline elements
|
||||
parse_audio = gst_elementfactory_make("ac3parse","parse_audio");
|
||||
g_return_if_fail(parse_audio != NULL);
|
||||
|
|
@ -54,7 +73,7 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
gst_bin_add(GST_BIN(audio_thread),GST_ELEMENT(audio_resample));
|
||||
gst_bin_add(GST_BIN(audio_thread),GST_ELEMENT(audio_encode));
|
||||
|
||||
gtk_object_set(GTK_OBJECT(mux),"audio","00",NULL);
|
||||
muxerpad = create_muxer (pipeline, "audio", "00");
|
||||
|
||||
// set up pad connections
|
||||
gst_element_add_ghost_pad(GST_ELEMENT(audio_thread),
|
||||
|
|
@ -66,7 +85,7 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
gst_pad_connect(gst_element_get_pad(audio_resample,"src"),
|
||||
gst_element_get_pad(audio_encode,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(audio_encode,"src"),
|
||||
gst_element_get_pad(mux,"audio_00"));
|
||||
muxerpad);
|
||||
|
||||
// construct queue and connect everything in the main pipelie
|
||||
audio_queue = gst_elementfactory_make("queue","audio_queue");
|
||||
|
|
@ -83,11 +102,9 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
g_print("setting to READY state\n");
|
||||
gst_element_set_state(GST_ELEMENT(audio_thread),GST_STATE_READY);
|
||||
} else if (strncmp(gst_pad_get_name(pad), "subtitle_stream_4", 17) == 0) {
|
||||
gst_pad_connect(pad,
|
||||
gst_element_get_pad(merge_subtitles,"subtitle"));
|
||||
//gst_pad_connect(pad,
|
||||
// gst_element_get_pad(merge_subtitles,"subtitle"));
|
||||
} else if (strncmp(gst_pad_get_name(pad), "audio_", 6) == 0) {
|
||||
gst_plugin_load("mp3parse");
|
||||
gst_plugin_load("mpg123");
|
||||
// construct internal pipeline elements
|
||||
parse_audio = gst_elementfactory_make("mp3parse","parse_audio");
|
||||
g_return_if_fail(parse_audio != NULL);
|
||||
|
|
@ -129,21 +146,14 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
} else if (strncmp(gst_pad_get_name(pad), "video_", 6) == 0) {
|
||||
//} else if (0) {
|
||||
|
||||
gst_plugin_load("mp1videoparse");
|
||||
gst_plugin_load("mpeg2play");
|
||||
gst_plugin_load("mpeg2subt");
|
||||
gst_plugin_load("smooth");
|
||||
gst_plugin_load("median");
|
||||
gst_plugin_load("videoscale");
|
||||
gst_plugin_load("mpeg2enc");
|
||||
//gst_plugin_load("mpeg1encoder");
|
||||
// construct internal pipeline elements
|
||||
parse_video = gst_elementfactory_make("mp1videoparse","parse_video");
|
||||
parse_video = gst_elementfactory_make("mp2videoparse","parse_video");
|
||||
g_return_if_fail(parse_video != NULL);
|
||||
decode_video = gst_elementfactory_make("mpeg2play","decode_video");
|
||||
g_return_if_fail(decode_video != NULL);
|
||||
merge_subtitles = gst_elementfactory_make("mpeg2subt","merge_subtitles");
|
||||
g_return_if_fail(merge_subtitles != NULL);
|
||||
//merge_subtitles = gst_elementfactory_make("mpeg2subt","merge_subtitles");
|
||||
//g_return_if_fail(merge_subtitles != NULL);
|
||||
videoscale = gst_elementfactory_make("videoscale","videoscale");
|
||||
g_return_if_fail(videoscale != NULL);
|
||||
gtk_object_set(GTK_OBJECT(videoscale),"width",352, "height", 288,NULL);
|
||||
|
|
@ -158,12 +168,12 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
gtk_object_set(GTK_OBJECT(smooth),"active",FALSE,NULL);
|
||||
encode = gst_elementfactory_make("mpeg2enc","encode");
|
||||
g_return_if_fail(encode != NULL);
|
||||
//gtk_object_set(GTK_OBJECT(encode),"frames_per_second",25.0,NULL);
|
||||
gtk_object_set(GTK_OBJECT(encode),"frames_per_second",29.97,NULL);
|
||||
gtk_object_set(GTK_OBJECT(encode),"frames_per_second",25.0,NULL);
|
||||
//gtk_object_set(GTK_OBJECT(encode),"frames_per_second",29.97,NULL);
|
||||
//encode = gst_elementfactory_make("mpeg1encoder","encode");
|
||||
//gtk_object_set(GTK_OBJECT(show),"width",640, "height", 480,NULL);
|
||||
|
||||
gtk_object_set(GTK_OBJECT(mux),"video","00",NULL);
|
||||
muxerpad = create_muxer (pipeline, "video", "00");
|
||||
|
||||
// create the thread and pack stuff into it
|
||||
video_thread = gst_thread_new("video_thread");
|
||||
|
|
@ -185,15 +195,15 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
gst_pad_connect(gst_element_get_pad(decode_video,"src"),
|
||||
gst_element_get_pad(median,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(median,"src"),
|
||||
gst_element_get_pad(merge_subtitles,"video"));
|
||||
gst_pad_connect(gst_element_get_pad(merge_subtitles,"src"),
|
||||
// gst_element_get_pad(merge_subtitles,"video"));
|
||||
//gst_pad_connect(gst_element_get_pad(merge_subtitles,"src"),
|
||||
gst_element_get_pad(videoscale,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(videoscale,"src"),
|
||||
gst_element_get_pad(smooth,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(smooth,"src"),
|
||||
gst_element_get_pad(encode,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(encode,"src"),
|
||||
gst_element_get_pad(mux,"video_00"));
|
||||
muxerpad);
|
||||
|
||||
// construct queue and connect everything in the main pipeline
|
||||
video_queue = gst_elementfactory_make("queue","video_queue");
|
||||
|
|
@ -216,15 +226,12 @@ void mp2tomp1(GstElement *parser,GstPad *pad, GstElement *pipeline) {
|
|||
|
||||
int main(int argc,char *argv[]) {
|
||||
GstElement *pipeline, *src, *parse;
|
||||
GstElement *fdsink;
|
||||
GstElementFactory *fdsinkfactory;
|
||||
int fd;
|
||||
|
||||
g_print("have %d args\n",argc);
|
||||
|
||||
gst_init(&argc,&argv);
|
||||
gst_plugin_load("mpeg2parse");
|
||||
gst_plugin_load("system_encode");
|
||||
|
||||
pipeline = gst_pipeline_new("pipeline");
|
||||
g_return_val_if_fail(pipeline != NULL, -1);
|
||||
|
|
@ -244,8 +251,6 @@ int main(int argc,char *argv[]) {
|
|||
parse = gst_elementfactory_make("mpeg2parse","parse");
|
||||
g_return_val_if_fail(parse != NULL, -1);
|
||||
|
||||
mux = gst_elementfactory_make("system_encode","mux");
|
||||
g_return_val_if_fail(mux != NULL, -1);
|
||||
fd = open(argv[2],O_CREAT|O_RDWR|O_TRUNC, S_IREAD|S_IWRITE);
|
||||
g_return_val_if_fail(fd >= 0, -1);
|
||||
fdsinkfactory = gst_elementfactory_find("fdsink");
|
||||
|
|
@ -256,8 +261,7 @@ int main(int argc,char *argv[]) {
|
|||
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(src));
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(parse));
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(mux));
|
||||
gst_bin_add(GST_BIN(pipeline),GST_ELEMENT(fdsink));
|
||||
|
||||
|
||||
gtk_signal_connect(GTK_OBJECT(parse),"new_pad",mp2tomp1, pipeline);
|
||||
|
||||
|
|
@ -265,8 +269,6 @@ int main(int argc,char *argv[]) {
|
|||
|
||||
gst_pad_connect(gst_element_get_pad(src,"src"),
|
||||
gst_element_get_pad(parse,"sink"));
|
||||
gst_pad_connect(gst_element_get_pad(mux,"src"),
|
||||
gst_element_get_pad(fdsink,"sink"));
|
||||
|
||||
g_print("setting to READY state\n");
|
||||
gst_element_set_state(GST_ELEMENT(pipeline),GST_STATE_PLAYING);
|
||||
|
|
|
|||
Loading…
Reference in a new issue