gstreamer/tools/gst-transcoder.c

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2015-12-03 11:32:05 +00:00
/* GStreamer
*
* Copyright (C) 2015 Thibault Saunier <tsaunier@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <string.h>
#include "utils.h"
#include <gst/transcoder/gsttranscoder.h>
static const gchar *HELP_SUMMARY =
"gst-transcoder-1.0 transcodes a stream defined by its first <input-uri>\n"
"argument to the place defined by its second <output-uri> argument\n"
"into the format described in its third <encoding-format> argument,\n"
"or using the given <output-uri> file extension.\n"
"\n"
"The <encoding-format> argument:\n"
"===============================\n"
"\n"
"If the encoding format is not defined, it will be guessed with\n"
"the given <output-uri> file extension."
"\n"
"<encoding-format> describe the media format into which the\n"
"input stream is going to be transcoded. We have two different\n"
"ways of describing the format:\n"
"\n"
"GstEncodingProfile serialization format\n"
"---------------------------------------\n"
"\n"
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"GStreamer encoding profiles can be described with a quite extensive\n"
"syntax which is described in the GstEncodingProfile documentation.\n"
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"\n"
"The simple case looks like:\n"
"\n"
" muxer_source_caps:videoencoder_source_caps:audioencoder_source_caps\n"
"\n"
"Name and category of serialized GstEncodingTarget\n"
"-------------------------------------------------\n"
"\n"
"Encoding targets describe well known formats which\n"
"those are provided in '.gep' files. You can list\n"
"available ones using the `--list-targets` argument.\n";
typedef struct
{
gint cpu_usage, rate;
gboolean list;
GstEncodingProfile *profile;
gchar *src_uri, *dest_uri, *encoding_format, *size;
gchar *framerate;
} Settings;
static void
position_updated_cb (GstTranscoder * transcoder, GstClockTime pos)
{
GstClockTime dur = -1;
gchar status[64] = { 0, };
g_object_get (transcoder, "duration", &dur, NULL);
memset (status, ' ', sizeof (status) - 1);
if (pos != -1 && dur > 0 && dur != -1) {
gchar dstr[32], pstr[32];
/* FIXME: pretty print in nicer format */
g_snprintf (pstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
pstr[9] = '\0';
g_snprintf (dstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
dstr[9] = '\0';
g_print ("%s / %s %s\r", pstr, dstr, status);
}
}
static GList *
get_profiles_of_type (GstEncodingProfile * profile, GType profile_type)
{
GList *tmp, *profiles = NULL;
if (GST_IS_ENCODING_CONTAINER_PROFILE (profile)) {
for (tmp = (GList *)
gst_encoding_container_profile_get_profiles
(GST_ENCODING_CONTAINER_PROFILE (profile)); tmp; tmp = tmp->next) {
if (G_OBJECT_TYPE (tmp->data) == profile_type)
profiles = g_list_prepend (profiles, tmp->data);
}
} else if (GST_IS_ENCODING_VIDEO_PROFILE (profile)) {
profiles = g_list_prepend (profiles, profile);
}
return profiles;
}
static gboolean
set_video_settings (Settings * settings)
{
GList *video_profiles, *tmp;
gchar *p, *tmpstr, **vsize;
gint width = 0, height = 0;
GValue framerate = G_VALUE_INIT;
if (!settings->size && !settings->framerate)
return TRUE;
if (settings->size) {
p = tmpstr = g_strdup (settings->size);
for (; *p; ++p)
*p = g_ascii_tolower (*p);
vsize = g_strsplit (tmpstr, "x", -1);
g_free (tmpstr);
if (!vsize[1] || vsize[2]) {
g_strfreev (vsize);
error ("Video size should be in the form: WxH, got %s", settings->size);
return FALSE;
}
width = g_ascii_strtoull (vsize[0], NULL, 0);
height = g_ascii_strtoull (vsize[1], NULL, 10);
g_strfreev (vsize);
}
if (settings->framerate) {
g_value_init (&framerate, GST_TYPE_FRACTION);
if (!gst_value_deserialize (&framerate, settings->framerate)) {
error ("Video framerate should be either a fraction or an integer"
" not: %s", settings->framerate);
return FALSE;
}
}
video_profiles = get_profiles_of_type (settings->profile,
GST_TYPE_ENCODING_VIDEO_PROFILE);
for (tmp = video_profiles; tmp; tmp = tmp->next) {
GstCaps *rest = gst_encoding_profile_get_restriction (tmp->data);
if (!rest)
rest = gst_caps_new_empty_simple ("video/x-raw");
else
rest = gst_caps_copy (rest);
if (settings->size) {
gst_caps_set_simple (rest, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, NULL);
}
if (settings->framerate)
gst_caps_set_value (rest, "framerate", &framerate);
gst_encoding_profile_set_restriction (tmp->data, rest);
}
return TRUE;
}
static gboolean
set_audio_settings (Settings * settings)
{
GList *audio_profiles, *tmp;
if (settings->rate < 0)
return TRUE;
audio_profiles =
get_profiles_of_type (settings->profile, GST_TYPE_ENCODING_AUDIO_PROFILE);
for (tmp = audio_profiles; tmp; tmp = tmp->next) {
GstCaps *rest = gst_encoding_profile_get_restriction (tmp->data);
if (!rest)
rest = gst_caps_new_empty_simple ("audio/x-raw");
else
rest = gst_caps_copy (rest);
gst_caps_set_simple (rest, "rate", G_TYPE_INT, settings->rate, NULL);
gst_encoding_profile_set_restriction (tmp->data, rest);
}
return TRUE;
}
static void
list_encoding_targets (void)
{
GList *tmp, *targets = gst_encoding_list_all_targets (NULL);
for (tmp = targets; tmp; tmp = tmp->next) {
GstEncodingTarget *target = tmp->data;
GList *usable_profiles = get_usable_profiles (target);
if (usable_profiles) {
GList *tmpprof;
g_print ("\n%s (%s): %s\n * Profiles:\n",
gst_encoding_target_get_name (target),
gst_encoding_target_get_category (target),
gst_encoding_target_get_description (target));
for (tmpprof = usable_profiles; tmpprof; tmpprof = tmpprof->next)
g_print (" - %s: %s",
gst_encoding_profile_get_name (tmpprof->data),
gst_encoding_profile_get_description (tmpprof->data));
g_print ("\n");
g_list_free (usable_profiles);
}
}
g_list_free_full (targets, (GDestroyNotify) g_object_unref);
}
static void
_error_cb (GstTranscoder * transcoder, GError * err, GstStructure * details)
{
if (g_error_matches (err, GST_CORE_ERROR, GST_CORE_ERROR_PAD)) {
GstPadLinkReturn lret;
GType type;
if (details && gst_structure_get (details, "linking-error",
GST_TYPE_PAD_LINK_RETURN, &lret,
"msg-source-type", G_TYPE_GTYPE, &type, NULL) &&
type == g_type_from_name ("GstTranscodeBin")) {
const gchar *debug = gst_structure_get_string (details, "debug");
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error ("\nCould not setup transcoding pipeline,"
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" make sure that your transcoding format parameters"
" are compatible with the input stream.\n\n%s", debug);
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return;
}
}
error ("\nFAILURE: %s", err->message);
}
static void
_warning_cb (GstTranscoder * transcoder, GError * error, GstStructure * details)
{
gboolean cant_encode;
GstCaps *caps = NULL;
gchar *stream_id = NULL;
if (details && gst_structure_get (details, "can-t-encode-stream",
G_TYPE_BOOLEAN, &cant_encode, "stream-caps", GST_TYPE_CAPS,
&caps, "stream-id", G_TYPE_STRING, &stream_id, NULL)) {
gchar *source_uri = gst_transcoder_get_source_uri (transcoder);
warn ("WARNING: Input stream %s: WON'T BE ENCODED.\n"
"Make sure the encoding settings are valid and that"
" any preset you set actually exists.\n"
"For more information about that stream, you can inspect"
" the source stream with:\n\n"
" gst-discoverer-1.0 -v %s\n", stream_id, source_uri);
gst_caps_unref (caps);
g_free (stream_id);;
g_free (source_uri);;
return;
}
warn ("Got warning: %s", error->message);
}
int
main (int argc, char *argv[])
{
gint res = 0;
GError *err = NULL;
GstTranscoder *transcoder;
GOptionContext *ctx;
Settings settings = {
.cpu_usage = 100,
.rate = -1,
.encoding_format = NULL,
.size = NULL,
.framerate = NULL,
};
GOptionEntry options[] = {
{"cpu-usage", 'c', 0, G_OPTION_ARG_INT, &settings.cpu_usage,
"The CPU usage to target in the transcoding process", NULL},
{"list-targets", 'l', G_OPTION_ARG_NONE, 0, &settings.list,
"List all encoding targets", NULL},
{"size", 's', 0, G_OPTION_ARG_STRING, &settings.size,
"set frame size (WxH or abbreviation)", NULL},
{"audio-rate", 'r', 0, G_OPTION_ARG_INT, &settings.rate,
"set audio sampling rate (in Hz)", NULL},
{"framerate", 'f', 0, G_OPTION_ARG_STRING, &settings.framerate,
"set video framerate as a fraction (24/1 for 24fps)"
" or a single number (24 for 24fps))", NULL},
{"video-encoder", 'v', 0, G_OPTION_ARG_STRING, &settings.size,
"The video encoder to use.", NULL},
{NULL}
};
g_set_prgname ("gst-transcoder");
ctx = g_option_context_new ("<source uri> <destination uri> "
"[<encoding format>[/<encoding profile name>]]");
g_option_context_set_summary (ctx, HELP_SUMMARY);
g_option_context_add_main_entries (ctx, options, NULL);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
g_clear_error (&err);
g_option_context_free (ctx);
return 1;
}
gst_pb_utils_init ();
if (settings.list) {
list_encoding_targets ();
return 0;
}
if (argc < 3 || argc > 4) {
g_print ("%s", g_option_context_get_help (ctx, TRUE, NULL));
g_option_context_free (ctx);
return -1;
}
g_option_context_free (ctx);
settings.src_uri = ensure_uri (argv[1]);
settings.dest_uri = ensure_uri (argv[2]);
if (argc == 3) {
settings.encoding_format = get_file_extension (settings.dest_uri);
if (!settings.encoding_format)
goto no_extension;
} else {
settings.encoding_format = argv[3];
}
settings.profile = create_encoding_profile (settings.encoding_format);
if (!settings.profile) {
error ("Could not find any encoding format for %s\n",
settings.encoding_format);
warn ("You can list available targets using %s --list-targets", argv[0]);
res = 1;
goto done;
}
g_print ("Encoding to:\n\n");
describe_encoding_profile (settings.profile);
if (!set_video_settings (&settings)) {
res = -1;
goto done;
}
if (!set_audio_settings (&settings)) {
res = -1;
goto done;
}
transcoder = gst_transcoder_new_full (settings.src_uri, settings.dest_uri,
settings.profile, NULL);
gst_transcoder_set_avoid_reencoding (transcoder, TRUE);
gst_transcoder_set_cpu_usage (transcoder, settings.cpu_usage);
g_signal_connect (transcoder, "position-updated",
G_CALLBACK (position_updated_cb), NULL);
g_signal_connect (transcoder, "warning", G_CALLBACK (_warning_cb), NULL);
g_signal_connect (transcoder, "error", G_CALLBACK (_error_cb), NULL);
g_assert (transcoder);
ok ("Starting transcoding...");
gst_transcoder_run (transcoder, &err);
if (!err)
ok ("\nDONE.");
done:
g_free (settings.dest_uri);
g_free (settings.src_uri);
return res;
no_extension:
error ("No <encoding-format> specified and no extension"
" available in the output target: %s", settings.dest_uri);
res = 1;
goto done;
}