gtk2_ardour/add_video_dialog.cc

   1 /*
   2     Copyright (C) 2010-2013 Paul Davis
   3     Author: Robin Gareus <robin@gareus.org>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20 #ifdef WITH_VIDEOTIMELINE
  21
  22 #include <cstdio>
  23 #include <cmath>
  24
  25 #include <sigc++/bind.h>
  26 #include <curl/curl.h>
  27
  28 #include "pbd/error.h"
  29 #include "pbd/convert.h"
  30 #include "gtkmm2ext/utils.h"
  31 #include "gtkmm2ext/rgb_macros.h"
  32 #include "ardour/session_directory.h"
  33 #include "ardour/profile.h"
  34 #include "ardour/template_utils.h"
  35 #include "ardour/session.h"
  36 #include "ardour_ui.h"
  37
  38 #include "utils.h"
  39 #include "add_video_dialog.h"
  40 #include "utils_videotl.h"
  41 #include "i18n.h"
  42
  43 using namespace Gtk;
  44 using namespace std;
  45 using namespace PBD;
  46 using namespace ARDOUR;
  47
  48 #define PREVIEW_WIDTH (240)
  49 #define PREVIEW_HEIGHT (180)
  50
  51 #ifndef MIN
  52 #define MIN(a,b) ( (a) < (b) ? (a) : (b) )
  53 #endif
  54
  55 AddVideoDialog::AddVideoDialog (Session* s)
  56         : ArdourDialog (_("Set Video Track"))
  57         , seek_slider (0,1000,1)
  58         , preview_path ("")
  59         , pi_duration ("-", Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false)
  60         , pi_aspect ("-", Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false)
  61         , pi_fps ("-", Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false)
  62         , chooser (FILE_CHOOSER_ACTION_OPEN)
  63         , xjadeo_checkbox (_("Launch External Video Monitor"))
  64         , set_session_fps_checkbox (_("Adjust Session Framerate to Match Video Framerate"))
  65         , harvid_path ("")
  66         , harvid_reset (_("Reload docroot"))
  67         , harvid_list (ListStore::create(harvid_list_columns))
  68         , harvid_list_view (harvid_list)
  69 {
  70         set_session (s);
  71         set_name ("AddVideoDialog");
  72         set_position (Gtk::WIN_POS_MOUSE);
  73         set_modal (true);
  74         set_skip_taskbar_hint (true);
  75         set_resizable (true);
  76         set_size_request (800, -1);
  77
  78         harvid_initialized = false;
  79         std::string dstdir = video_dest_dir(_session->session_directory().video_path(), video_get_docroot(Config));
  80
  81         if (Config->get_video_advanced_setup()) {
  82
  83                 /* Harvid Browser */
  84                 harvid_list_view.append_column("", pixBufRenderer);
  85                 harvid_list_view.append_column(_("Filename"), harvid_list_columns.filename);
  86
  87                 harvid_list_view.get_column(0)->set_alignment(0.5);
  88                 harvid_list_view.get_column(0)->add_attribute(pixBufRenderer, "stock-id", harvid_list_columns.id);
  89                 harvid_list_view.get_column(1)->set_expand(true);
  90                 harvid_list_view.get_column(1)->set_sort_column(harvid_list_columns.filename);
  91                 harvid_list_view.set_enable_search(true);
  92                 harvid_list_view.set_search_column(1);
  93
  94                 harvid_list_view.get_selection()->set_mode (SELECTION_SINGLE);
  95
  96                 harvid_list_view.get_selection()->signal_changed().connect(sigc::mem_fun(*this, &AddVideoDialog::harvid_list_view_selected));
  97                 harvid_list_view.signal_row_activated().connect (sigc::mem_fun (*this, &AddVideoDialog::harvid_list_view_activated));
  98
  99                 VBox* vbox = manage (new VBox);
 100                 Gtk::ScrolledWindow *scroll = manage(new ScrolledWindow);
 101                 scroll->add(harvid_list_view);
 102                 scroll->set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
 103
 104                 HBox* hbox = manage (new HBox);
 105                 harvid_path.set_alignment (0, 0.5);
 106                 hbox->pack_start (harvid_path, true, true);
 107                 hbox->pack_start (harvid_reset, false, false);
 108
 109                 vbox->pack_start (*hbox, false, false);
 110                 vbox->pack_start (*scroll, true, true);
 111
 112                 notebook.append_page (*vbox, _("VideoServerIndex"));
 113         } else {
 114                 /* dummy entry */
 115                 VBox* vbox = manage (new VBox);
 116                 notebook.append_page (*vbox, _("VideoServerIndex"));
 117         }
 118
 119         /* file chooser */
 120         chooser.set_border_width (4);
 121 #ifdef GTKOSX
 122         /* some broken redraw behaviour - this is a bandaid */
 123         chooser.signal_selection_changed().connect (mem_fun (chooser, &Widget::queue_draw));
 124 #endif
 125         chooser.set_current_folder (dstdir);
 126
 127         Gtk::FileFilter video_filter;
 128         Gtk::FileFilter matchall_filter;
 129         video_filter.add_custom (FILE_FILTER_FILENAME, mem_fun(*this, &AddVideoDialog::on_video_filter));
 130         video_filter.set_name (_("Video files"));
 131
 132         matchall_filter.add_pattern ("*.*");
 133         matchall_filter.set_name (_("All files"));
 134
 135         chooser.add_filter (video_filter);
 136         chooser.add_filter (matchall_filter);
 137         chooser.set_select_multiple (false);
 138
 139         /* file import options */
 140         import_combo.set_name ("PaddedButton");
 141         import_combo.append_text(_("Reference From Current Location"));
 142         import_combo.append_text(_("Hardlink or Copy to Session"));
 143         import_combo.append_text(_("Transcode to Session"));
 144         import_combo.set_active(2);
 145
 146         VBox* vboxfb = manage (new VBox);
 147         vboxfb->pack_start (chooser, true, true, 0);
 148         vboxfb->pack_start (import_combo, false, true, 4);
 149
 150         if (video_get_docroot(Config).size() > 0 &&
 151                         Config->get_video_advanced_setup()) {
 152                 notebook.append_page (*vboxfb, _("Browse Files"));
 153         }
 154
 155         /* Global Options*/
 156         Gtk::Label* l;
 157         VBox* options_box = manage (new VBox);
 158
 159         l = manage (new Label (_("<b>Options</b>"), Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 160         l->set_use_markup ();
 161
 162         options_box->pack_start (*l, false, true, 4);
 163         options_box->pack_start (xjadeo_checkbox, false, true, 2);
 164         options_box->pack_start (set_session_fps_checkbox, false, true, 2);
 165
 166         /* preview pane */
 167         VBox* previewpane = manage (new VBox);
 168         Gtk::Table *table = manage(new Table(4,2));
 169
 170         table->set_row_spacings(2);
 171         table->set_col_spacings(4);
 172
 173         l = manage (new Label (_("<b>Video Information</b>"), Gtk::ALIGN_CENTER, Gtk::ALIGN_CENTER, false));
 174         l->set_use_markup ();
 175         table->attach (*l, 0, 2, 0, 1, FILL, FILL);
 176         l = manage (new Label (_("Duration:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 177         table->attach (*l, 0, 1, 1, 2, FILL, FILL);
 178         table->attach (pi_duration, 1, 2, 1, 2, FILL, FILL);
 179         l = manage (new Label (_("Frame rate:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 180         table->attach (*l, 0, 1, 2, 3, FILL, FILL);
 181         table->attach (pi_fps, 1, 2, 2, 3, FILL, FILL);
 182         l = manage (new Label (_("Aspect Ratio:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 183         table->attach (*l, 0, 1, 3, 4, FILL, FILL);
 184         table->attach (pi_aspect, 1, 2, 3, 4, FILL, FILL);
 185
 186         preview_image = manage(new Gtk::Image);
 187
 188         imgbuf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, PREVIEW_WIDTH, PREVIEW_HEIGHT);
 189         imgbuf->fill(RGBA_TO_UINT(127,0,0,255));
 190         preview_image->set(imgbuf);
 191         seek_slider.set_draw_value(false);
 192
 193         HBox* hbox = manage (new HBox);
 194         hbox->pack_start (*table, true, false);
 195
 196         Gtk::Alignment *al = manage(new Gtk::Alignment());
 197         al->set_size_request(-1, 20);
 198
 199         previewpane->pack_start (*al, false, false);
 200         previewpane->pack_start (*hbox, true, true, 6);
 201         previewpane->pack_start (*preview_image, false, false);
 202         previewpane->pack_start (seek_slider, false, false);
 203
 204         /* Overall layout */
 205         hbox = manage (new HBox);
 206         if (Config->get_video_advanced_setup()) {
 207                 hbox->pack_start (notebook, true, true);
 208         } else {
 209                 hbox->pack_start (*vboxfb, true, true);
 210         }
 211         hbox->pack_start (*previewpane, false, false);
 212
 213         get_vbox()->set_spacing (4);
 214         get_vbox()->pack_start (*hbox, true, true);
 215         get_vbox()->pack_start (*options_box, false, false);
 216
 217
 218         /* xjadeo checkbox */
 219         if (ARDOUR_UI::instance()->video_timeline->found_xjadeo()
 220                         /* TODO xjadeo setup w/ xjremote */
 221                         && video_get_docroot(Config).size() > 0) {
 222                 xjadeo_checkbox.set_active(true);  /* set in ardour_ui.cpp ?! */
 223         } else {
 224                 printf("xjadeo was not found or video-server docroot is unset (remote video-server)\n");
 225                 xjadeo_checkbox.set_active(false);
 226                 xjadeo_checkbox.set_sensitive(false);
 227         }
 228
 229         /* FPS checkbox */
 230         set_session_fps_checkbox.set_active(true);
 231
 232         /* Buttons */
 233         add_button (Stock::CANCEL, RESPONSE_CANCEL);
 234         ok_button = add_button (Stock::OK, RESPONSE_ACCEPT);
 235         //ok_button->set_sensitive(false);
 236         set_action_ok(false);
 237
 238         /* connect signals after eveything has been initialized */
 239         chooser.signal_selection_changed().connect (mem_fun (*this, &AddVideoDialog::file_selection_changed));
 240         chooser.signal_file_activated().connect (mem_fun (*this, &AddVideoDialog::file_activated));
 241         //chooser.signal_update_preview().connect(sigc::mem_fun(*this, &AddVideoDialog::update_preview));
 242         notebook.signal_switch_page().connect (sigc::hide_return (sigc::hide (sigc::hide (sigc::mem_fun (*this, &AddVideoDialog::page_switch)))));
 243         seek_slider.signal_value_changed().connect(sigc::mem_fun(*this, &AddVideoDialog::seek_preview));
 244         harvid_reset.signal_clicked().connect (sigc::mem_fun (*this, &AddVideoDialog::harvid_load_docroot));
 245
 246         show_all_children ();
 247 }
 248
 249 AddVideoDialog::~AddVideoDialog ()
 250 {
 251 }
 252
 253 void
 254 AddVideoDialog::on_show ()
 255 {
 256         Dialog::on_show ();
 257 }
 258
 259 static bool check_video_file_extension(std::string file)
 260 {
 261         const char* suffixes[] = {
 262                 ".avi"     , ".AVI"     ,
 263                 ".mov"     , ".MOV"     ,
 264                 ".ogg"     , ".OGG"     ,
 265                 ".ogv"     , ".OGV"     ,
 266                 ".mpg"     , ".MPG"     ,
 267                 ".mov"     , ".MOV"     ,
 268                 ".mp4"     , ".MP4"     ,
 269                 ".mkv"     , ".MKV"     ,
 270                 ".vob"     , ".VOB"     ,
 271                 ".asf"     , ".ASF"     ,
 272                 ".avs"     , ".AVS"     ,
 273                 ".dts"     , ".DTS"     ,
 274                 ".flv"     , ".FLV"     ,
 275                 ".m4v"     , ".M4V"     ,
 276                 ".matroska", ".MATROSKA",
 277                 ".h264"    , ".H264"    ,
 278                 ".dv"      , ".DV"      ,
 279                 ".dirac"   , ".DIRAC"   ,
 280                 ".webm"    , ".WEBM"    ,
 281         };
 282
 283         for (size_t n = 0; n < sizeof(suffixes)/sizeof(suffixes[0]); ++n) {
 284                 if (file.rfind (suffixes[n]) == file.length() - strlen (suffixes[n])) {
 285                         return true;
 286                 }
 287         }
 288
 289         return false;
 290 }
 291
 292 bool
 293 AddVideoDialog::on_video_filter (const FileFilter::Info& filter_info)
 294 {
 295         return check_video_file_extension(filter_info.filename);
 296 }
 297
 298 std::string
 299 AddVideoDialog::file_name (bool &local_file)
 300 {
 301         int n = notebook.get_current_page ();
 302         if (n == 1 || ! Config->get_video_advanced_setup()) {
 303                 local_file = true;
 304                 return chooser.get_filename();
 305         } else {
 306                 local_file = false;
 307                 Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 308                 if(!iter) return "";
 309
 310                 std::string uri = (*iter)[harvid_list_columns.uri];
 311                 std::string video_server_url = video_get_server_url(Config);
 312
 313                 /* check if video server is running locally */
 314                 if (video_get_docroot(Config).size() > 0
 315                                 && !video_server_url.compare(0, 16, "http://localhost"))
 316                 {
 317                         /* check if the file can be accessed */
 318                         int plen;
 319                         CURL *curl;
 320                         curl = curl_easy_init();
 321                         char *ue = curl_easy_unescape(curl, uri.c_str(), uri.length(), &plen);
 322                         std::string path = video_get_docroot(Config) + ue;
 323                         if (!::access(path.c_str(), R_OK)) {
 324                                 uri = path;
 325                                 local_file = true;
 326                         }
 327                         curl_easy_cleanup(curl);
 328                         curl_free(ue);
 329                 }
 330                 return uri;
 331         }
 332 }
 333
 334 enum VtlImportOption
 335 AddVideoDialog::import_option ()
 336 {
 337         int n = notebook.get_current_page ();
 338         if (n == 0 && Config->get_video_advanced_setup()) { return VTL_IMPORT_NONE; }
 339         int i = import_combo.get_active_row_number();
 340         return static_cast<VtlImportOption>(i);
 341 }
 342
 343 bool
 344 AddVideoDialog::launch_xjadeo ()
 345 {
 346         return xjadeo_checkbox.get_active();
 347 }
 348
 349 bool
 350 AddVideoDialog::auto_set_session_fps ()
 351 {
 352         return set_session_fps_checkbox.get_active();
 353 }
 354
 355 void
 356 AddVideoDialog::set_action_ok (bool yn)
 357 {
 358         if (yn) {
 359                 ok_button->set_sensitive(true);
 360         } else {
 361                 preview_path = "";
 362                 pi_duration.set_text("-");
 363                 pi_aspect.set_text("-");
 364                 pi_fps.set_text("-");
 365                 ok_button->set_sensitive(false);
 366                 imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 367                 video_draw_cross(imgbuf);
 368                 preview_image->set(imgbuf);
 369                 preview_image->show();
 370         }
 371 }
 372
 373 void
 374 AddVideoDialog::file_selection_changed ()
 375 {
 376         if (chooser.get_filename().size() > 0) {
 377                 std::string path = chooser.get_filename();
 378                 bool ok =
 379                                 check_video_file_extension(path)
 380                                 &&  Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 381                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 382                 set_action_ok(ok);
 383                 if (ok) {
 384                         request_preview(video_map_path(video_get_docroot(Config), path));
 385                 }
 386         } else {
 387                 set_action_ok(false);
 388         }
 389 }
 390
 391 void
 392 AddVideoDialog::file_activated ()
 393 {
 394         if (chooser.get_filename().size() > 0) {
 395                 std::string path = chooser.get_filename();
 396                 // TODO check docroot -> set import options
 397                 bool ok =
 398                                 check_video_file_extension(path)
 399                                 &&  Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 400                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 401                 if (ok) {
 402                         Gtk::Dialog::response(RESPONSE_ACCEPT);
 403                 }
 404         }
 405 }
 406
 407 /**** Tree List Interaction ***/
 408
 409 void
 410 AddVideoDialog::harvid_list_view_selected () {
 411         Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 412         // TODO check docroot -> set import options, xjadeo
 413         if(!iter) {
 414                 set_action_ok(false);
 415                 return;
 416         }
 417         if ((std::string)((*iter)[harvid_list_columns.id]) == Stock::DIRECTORY.id) {
 418                 set_action_ok(false);
 419         } else {
 420                 set_action_ok(true);
 421                 request_preview((*iter)[harvid_list_columns.uri]);
 422         }
 423 }
 424
 425 void
 426 AddVideoDialog::harvid_list_view_activated (const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn*) {
 427         Gtk::TreeModel::iterator iter = harvid_list->get_iter(path);
 428         if (!iter) return;
 429         std::string type = (*iter)[harvid_list_columns.id];
 430         std::string url = (*iter)[harvid_list_columns.uri];
 431
 432 #if 0
 433         printf ("A: %s %s %s\n",
 434                         ((std::string)((*iter)[harvid_list_columns.id])).c_str(),
 435                         ((std::string)((*iter)[harvid_list_columns.uri])).c_str(),
 436                         ((std::string)((*iter)[harvid_list_columns.filename])).c_str());
 437 #endif
 438
 439         if (type == Gtk::Stock::DIRECTORY.id) {
 440                 harvid_request(url.c_str());
 441         } else {
 442                 Gtk::Dialog::response(RESPONSE_ACCEPT);
 443         }
 444 }
 445
 446 void
 447 AddVideoDialog::harvid_load_docroot() {
 448         set_action_ok(false);
 449
 450         std::string video_server_url = video_get_server_url(Config);
 451         char url[2048];
 452         snprintf(url, sizeof(url), "%s%sindex/"
 453                 , video_server_url.c_str()
 454                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/");
 455         harvid_request(url);
 456         harvid_initialized = true;
 457 }
 458
 459 bool
 460 AddVideoDialog::page_switch() {
 461         if (notebook.get_current_page () == 1 || Config->get_video_advanced_setup()) {
 462                 file_selection_changed();
 463                 return true;
 464         }
 465
 466         if (harvid_initialized) {
 467                 harvid_list_view_selected();
 468         } else {
 469                 harvid_load_docroot();
 470         }
 471         return true;
 472 }
 473
 474 /**** Harvid HTTP interface ***/
 475 void
 476 AddVideoDialog::harvid_request(std::string u)
 477 {
 478         char url[2048];
 479         int status;
 480         snprintf(url, sizeof(url), "%s?format=csv", u.c_str());
 481
 482         harvid_list->clear();
 483
 484         char *res = curl_http_get(url, &status);
 485         if (status != 200) {
 486                 printf("request failed\n"); // XXX
 487                 harvid_path.set_text(" - request failed -");
 488                 free(res);
 489                 return;
 490         }
 491
 492         /* add up-to-parent */
 493         size_t se = u.find_last_of("/", u.size()-2);
 494         size_t ss = u.find("/index/");
 495         if (se != string::npos && ss != string::npos && se > ss) {
 496                 TreeModel::iterator new_row = harvid_list->append();
 497                 TreeModel::Row row = *new_row;
 498                 row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 499                 row[harvid_list_columns.uri     ] = u.substr(0, se + 1);
 500                 row[harvid_list_columns.filename] = X_("..");
 501         }
 502         if (se != string::npos) {
 503                 int plen;
 504                 std::string path = u.substr(ss + 6);
 505                 CURL *curl;
 506                 curl = curl_easy_init();
 507                 char *ue = curl_easy_unescape(curl, path.c_str(), path.length(), &plen);
 508                 harvid_path.set_text(std::string(ue));
 509                 curl_easy_cleanup(curl);
 510                 curl_free(ue);
 511         } else {
 512                 harvid_path.set_text(" ??? ");
 513         }
 514
 515         if (!res) return;
 516
 517         std::vector<std::vector<std::string> > lines;
 518         ParseCSV(std::string(res), lines);
 519         for (std::vector<std::vector<std::string> >::iterator i = lines.begin(); i != lines.end(); ++i) {
 520                 TreeModel::iterator new_row = harvid_list->append();
 521                 TreeModel::Row row = *new_row;
 522
 523                 if (i->at(0) == X_("D")) {
 524                         row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 525                         row[harvid_list_columns.uri     ] = i->at(1).c_str();
 526                         row[harvid_list_columns.filename] = i->at(2).c_str();
 527                 } else {
 528                         row[harvid_list_columns.id      ] = Gtk::Stock::MEDIA_PLAY.id;
 529                         row[harvid_list_columns.uri     ] = i->at(2).c_str();
 530                         row[harvid_list_columns.filename] = i->at(3).c_str();
 531                 }
 532         }
 533
 534         free(res);
 535 }
 536
 537 void
 538 AddVideoDialog::seek_preview()
 539 {
 540         if (preview_path.size() > 0)
 541                 request_preview(preview_path);
 542 }
 543
 544 void
 545 AddVideoDialog::request_preview(std::string u)
 546 {
 547         std::string video_server_url = video_get_server_url(Config);
 548
 549         double video_file_fps;
 550         long long int video_duration;
 551         double video_start_offset;
 552         double video_aspect_ratio;
 553
 554         int clip_width = PREVIEW_WIDTH;
 555         int clip_height = PREVIEW_HEIGHT;
 556         int clip_xoff, clip_yoff;
 557
 558         if (!video_query_info(video_server_url, u,
 559                         video_file_fps, video_duration, video_start_offset, video_aspect_ratio))
 560         {
 561                 printf("image preview info request failed\n");
 562                 // set_action_ok(false); // XXX only if docroot mismatch
 563                 preview_path = "";
 564                 pi_duration.set_text("-");
 565                 pi_aspect.set_text("-");
 566                 pi_fps.set_text("-");
 567                 return;
 568         }
 569
 570         if ((PREVIEW_WIDTH / (double)PREVIEW_HEIGHT) > video_aspect_ratio ) {
 571                 clip_width = MIN(PREVIEW_WIDTH, rint(clip_height * video_aspect_ratio));
 572         } else {
 573                 clip_height = MIN(PREVIEW_HEIGHT, rint(clip_width / video_aspect_ratio));
 574         }
 575
 576         pi_duration.set_text(string_compose("%1 sec", video_duration / video_file_fps));
 577         pi_aspect.set_text(string_compose("%1", video_aspect_ratio));
 578         pi_fps.set_text(string_compose("%1 fps", video_file_fps));
 579
 580         clip_xoff = (PREVIEW_WIDTH - clip_width)/2;
 581         clip_yoff = (PREVIEW_HEIGHT - clip_height)/2;
 582
 583         char url[2048];
 584         snprintf(url, sizeof(url), "%s%s?frame=%lli&w=%d&h=%di&file=%s&format=rgb"
 585                 , video_server_url.c_str()
 586                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/"
 587                 , (long long) (video_duration * seek_slider.get_value() / 1000.0)
 588                 , clip_width, clip_height, u.c_str());
 589
 590         char *data = curl_http_get(url, NULL);
 591         if (!data) {
 592                 printf("image preview request failed %s\n", url);
 593                 imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 594                 video_draw_cross(imgbuf);
 595                 preview_path = "";
 596         } else {
 597                 Glib::RefPtr<Gdk::Pixbuf> tmp;
 598                 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, false, 8, clip_width, clip_height, clip_width*3);
 599                 if (clip_width != PREVIEW_WIDTH || clip_height != PREVIEW_HEIGHT) {
 600                         imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 601                 }
 602                 tmp->copy_area (0, 0, clip_width, clip_height, imgbuf, clip_xoff, clip_yoff);
 603                 preview_path = u;
 604                 free(data);
 605         }
 606         preview_image->set(imgbuf);
 607         preview_image->show();
 608 }
 609
 610 #endif /* WITH_VIDEOTIMELINE */