cannot encode raw audio data to mpeg 4
narcisse doudieu siewe
wambenarcisse at yahoo.fr
Sat Oct 5 08:32:38 PDT 2013
my code here for Gstreamer 1.0 :
#include <stdio.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include <gst/gst.h>
#include <gst/pbutils/pbutils.h>
typedef struct _UserData UserData;
struct _userData
{
GstElement* encode;
GstElement* decode;
guint video_pad_num;
guint audio_pad_num;
};
void pad_added_on_decode(GstElement* decode, GstPad* new_pad, gpointer data)
{
UserData *priv = (UserData *)data;
GstCaps* caps = gst_pad_query_caps(new_pad, NULL);
GstPad* pad = NULL;
if(g_str_has_prefix(caps_repr, "video"))
{
gchar* encode_video_sink_pad_name = g_strdup_printf("video_%"G_GUINT64_FORMAT, priv->video_pad_num);
GstStaticPadTemplate static_tmpl = GST_STATIC_PAD_TEMPLATE("video_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
GstPadTemplate* video_tmpl = gst_static_pad_template_get(&static_tmpl);
pad = gst_element_request_pad( priv->encode,
video_tmpl,
encode_video_sink_pad_name,
NULL);
g_free(encode_video_sink_pad_name);
if(pad == NULL) goto not_handled;
priv->video_pad_num++;
}
if(g_str_has_prefix(caps_repr, "audio"))
{
gchar* encode_audio_sink_pad_name = g_strdup_printf("audio_%"G_GUINT64_FORMAT, priv->audio_pad_num);
GstStaticPadTemplate static_tmpl = GST_STATIC_PAD_TEMPLATE("audio_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
GstPadTemplate* audio_tmpl = gst_static_pad_template_get(&static_tmpl);
pad = gst_element_request_pad( priv->encode,
audio_tmpl,
encode_audio_sink_pad_name,
NULL);
g_free(encode_audio_sink_pad_name);
if(pad == NULL) goto not_handled;
priv->audio_pad_num++;
}
if(gst_pad_can_link (new_pad, pad) && !gst_pad_is_linked(pad))
{
gst_pad_link(new_pad, pad);
priv->pad_list = g_slist_append(priv->pad_list, (gpointer)pad);
}
else goto not_handled;
gst_caps_unref(caps);
return;
not_handled:;
{
gst_element_release_request_pad(priv->encode, pad);
}
}
void watch_on_bus(GstBus *bus, GstMessage* msg, gpointer data)
{
if(GST_MESSAGE_TYPE(msg) == GST_MESSAGE_EOS)
{
gst_element_set_state (GST_ELEMENT(priv->pipe), GST_STATE_NULL);
gst_element_get_state (GST_ELEMENT(priv->pipe), NULL, NULL, GST_CLOCK_TIME_NONE);
}
}
int main(int argc, char* argv[])
{
gtk_init(&argc, &argv);
gst_init(&argc, &argv);
GFile* file;
UserData *p , user_data;
if(argc < 2)
{
printf("Gives a file name to encode in AVI container and Mpeg audio and video datas\n\n");
return -1;
}
else
{
file = g_file_new_for_path(argv[1]);
if(!g_file_query_exists(file, NULL))
{
printf("Gives one valid file name\n\n");
return -1;
}
}
// define a conatiner profile for encodebin
GstCaps* caps = gst_caps_from_string("video/x-msvideo");
GstEncodingContainerProfile* container = gst_encoding_container_profile_new ("AVI_CONVERTER",
"AVI_PROFILE", caps, NULL);
gst_caps_unref(caps);
g_object_ref(container);
//create an audio profile
caps = gst_caps_new_simple("audio/mpeg", "mpegversion", G_TYPE_INT , 4, "layer", G_TYPE_INT , 3,
"rate", G_TYPE_INT, 8000, NULL);
GstEncodingAudio audio_profile = gst_encoding_audio_profile_new(caps,
NULL, NULL, 0);
gst_caps_unref(caps);
//create video profile
caps = gst_caps_new_simple("video/mpeg", "mpegversion", G_TYPE_INT, 4, "width", G_TYPE_INT, 1024,
"height", G_TYPE_INT, 576, "framerate", GST_TYPE_FRACTION, 25, 1, NULL);
video_profile = gst_encoding_video_profile_new(caps,
NULL, NULL, 0);
gst_caps_unref(caps);
//add audio and vido profile to container profile
gst_encoding_container_profile_add_profile(priv->container, (GstEncodingProfile *)priv->video_profile);
gst_encoding_container_profile_add_profile(priv->container, (GstEncodingProfile *)priv->audio_profile);
//define elements for the pipeline
GstPipeline* pipe = GST_PIPELINE(gst_pipeline_new("pipe"));
g_object_ref(priv->pipe);
encode = gst_element_factory_make("encodebin", "encode");
decode = gst_element_factory_make("decodebin", "decode");
sink = gst_element_factory_make("filesink", "sink");
src = gst_element_factory_make("filesrc", "src");
gst_bin_add_many(GST_BIN(pipe), src, decode, encode, sink, NULL);
//set the defined profile on encode
g_object_set(G_OBJECT(priv->encode), "profile", priv->container, NULL);
//link elements together
gst_element_link(src, decode);
gst_element_link(encode, sink);
bus = gst_pipeline_get_bus (pipe);
//set a watch on bus a define some handler on it
gst_bus_add_signal_watch (bus);
g_signal_connect(G_OBJECT(priv->bus), "message", G_CALLBACK(watch_on_bus), NULL);
//sets a callback to handle the "pad-added" signal on decode
//set user data to past to the handler
user_data.encode = encode;
user_data.decode = decode;
user_data.video_pad_num = 0;
user_data.audio_pad_num = 0;
p = &user_data;
g_signal_connect(G_OBJECT(priv->decode), "pad-added", G_CALLBACK(padd_added_on_decode), (gpointer)p);
//place pipeline in a playing state
gst_element_set_state (GST_ELEMENT(priv->pipe), GST_STATE_PLAYING);
gst_element_get_state (GST_ELEMENT(priv->pipe), NULL, NULL, GST_CLOCK_TIME_NONE);
return 0;
}
________________________________
De : narcisse doudieu siewe <wambenarcisse at yahoo.fr>
À : Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
Envoyé le : Samedi 5 octobre 2013 11h52
Objet : Re: cannot encode raw audio data to mpeg 4
some codes in attachement
________________________________
De : Tim-Philipp Müller <t.i.m at zen.co.uk>
À : gstreamer-devel at lists.freedesktop.org
Envoyé le : Samedi 5 octobre 2013 8h42
Objet : Re: cannot encode raw audio data to mpeg 4
On Fri, 2013-10-04 at 21:31 +0100, narcisse doudieu siewe wrote:
Hi,
> I don't know but it seems that you cannot encode raw audio data to
> mpeg4 using encodebin
>
>
> another point: you cannot request encodebin to convert change your
> audio sample rate to another sample rate say: 48000 samples/s to
> 8000samples/s
> Can some body test it??
Maybe you could make available a minimal test application that
demonstrates what doesn't work. That way people don't have to write
their own code to verify your claims.
It would also be good to mention your GStreamer version, and how things
fail.
Cheers
-Tim
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