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         VBox* vboxfb = manage (new VBox);
 140         vboxfb->pack_start (chooser, true, true, 0);
 141
 142         if (video_get_docroot(Config).size() > 0 &&
 143                         Config->get_video_advanced_setup()) {
 144                 notebook.append_page (*vboxfb, _("Browse Files"));
 145         }
 146
 147         /* Global Options*/
 148         Gtk::Label* l;
 149         VBox* options_box = manage (new VBox);
 150
 151         l = manage (new Label (_("<b>Options</b>"), Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 152         l->set_use_markup ();
 153
 154         options_box->pack_start (*l, false, true, 4);
 155         options_box->pack_start (xjadeo_checkbox, false, true, 2);
 156         options_box->pack_start (set_session_fps_checkbox, false, true, 2);
 157
 158         /* preview pane */
 159         VBox* previewpane = manage (new VBox);
 160         Gtk::Table *table = manage(new Table(4,2));
 161
 162         table->set_row_spacings(2);
 163         table->set_col_spacings(4);
 164
 165         l = manage (new Label (_("<b>Video Information</b>"), Gtk::ALIGN_CENTER, Gtk::ALIGN_CENTER, false));
 166         l->set_use_markup ();
 167         table->attach (*l, 0, 2, 0, 1, FILL, FILL);
 168         l = manage (new Label (_("Duration:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 169         table->attach (*l, 0, 1, 1, 2, FILL, FILL);
 170         table->attach (pi_duration, 1, 2, 1, 2, FILL, FILL);
 171         l = manage (new Label (_("Frame rate:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 172         table->attach (*l, 0, 1, 2, 3, FILL, FILL);
 173         table->attach (pi_fps, 1, 2, 2, 3, FILL, FILL);
 174         l = manage (new Label (_("Aspect Ratio:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 175         table->attach (*l, 0, 1, 3, 4, FILL, FILL);
 176         table->attach (pi_aspect, 1, 2, 3, 4, FILL, FILL);
 177
 178         preview_image = manage(new Gtk::Image);
 179
 180         imgbuf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, PREVIEW_WIDTH, PREVIEW_HEIGHT);
 181         imgbuf->fill(RGBA_TO_UINT(127,0,0,255));
 182         preview_image->set(imgbuf);
 183         seek_slider.set_draw_value(false);
 184
 185         HBox* hbox = manage (new HBox);
 186         hbox->pack_start (*table, true, false);
 187
 188         Gtk::Alignment *al = manage(new Gtk::Alignment());
 189         al->set_size_request(-1, 20);
 190
 191         previewpane->pack_start (*al, false, false);
 192         previewpane->pack_start (*hbox, true, true, 6);
 193         previewpane->pack_start (*preview_image, false, false);
 194         previewpane->pack_start (seek_slider, false, false);
 195
 196         /* Overall layout */
 197         hbox = manage (new HBox);
 198         if (Config->get_video_advanced_setup()) {
 199                 hbox->pack_start (notebook, true, true);
 200         } else {
 201                 hbox->pack_start (*vboxfb, true, true);
 202         }
 203         hbox->pack_start (*previewpane, false, false);
 204
 205         get_vbox()->set_spacing (4);
 206         get_vbox()->pack_start (*hbox, true, true);
 207         get_vbox()->pack_start (*options_box, false, false);
 208
 209
 210         /* xjadeo checkbox */
 211         if (ARDOUR_UI::instance()->video_timeline->found_xjadeo()
 212                         /* TODO xjadeo setup w/ xjremote */
 213                         && video_get_docroot(Config).size() > 0) {
 214                 xjadeo_checkbox.set_active(true);  /* set in ardour_ui.cpp ?! */
 215         } else {
 216                 printf("xjadeo was not found or video-server docroot is unset (remote video-server)\n");
 217                 xjadeo_checkbox.set_active(false);
 218                 xjadeo_checkbox.set_sensitive(false);
 219         }
 220
 221         /* FPS checkbox */
 222         set_session_fps_checkbox.set_active(true);
 223
 224         /* Buttons */
 225         add_button (Stock::CANCEL, RESPONSE_CANCEL);
 226         ok_button = add_button (Stock::OK, RESPONSE_ACCEPT);
 227         //ok_button->set_sensitive(false);
 228         set_action_ok(false);
 229
 230         /* connect signals after eveything has been initialized */
 231         chooser.signal_selection_changed().connect (mem_fun (*this, &AddVideoDialog::file_selection_changed));
 232         chooser.signal_file_activated().connect (mem_fun (*this, &AddVideoDialog::file_activated));
 233         //chooser.signal_update_preview().connect(sigc::mem_fun(*this, &AddVideoDialog::update_preview));
 234         notebook.signal_switch_page().connect (sigc::hide_return (sigc::hide (sigc::hide (sigc::mem_fun (*this, &AddVideoDialog::page_switch)))));
 235         seek_slider.signal_value_changed().connect(sigc::mem_fun(*this, &AddVideoDialog::seek_preview));
 236         harvid_reset.signal_clicked().connect (sigc::mem_fun (*this, &AddVideoDialog::harvid_load_docroot));
 237
 238         show_all_children ();
 239 }
 240
 241 AddVideoDialog::~AddVideoDialog ()
 242 {
 243 }
 244
 245 void
 246 AddVideoDialog::on_show ()
 247 {
 248         Dialog::on_show ();
 249 }
 250
 251 static bool check_video_file_extension(std::string file)
 252 {
 253         const char* suffixes[] = {
 254                 ".avi"     , ".AVI"     ,
 255                 ".mov"     , ".MOV"     ,
 256                 ".ogg"     , ".OGG"     ,
 257                 ".ogv"     , ".OGV"     ,
 258                 ".mpg"     , ".MPG"     ,
 259                 ".mov"     , ".MOV"     ,
 260                 ".mp4"     , ".MP4"     ,
 261                 ".mkv"     , ".MKV"     ,
 262                 ".vob"     , ".VOB"     ,
 263                 ".asf"     , ".ASF"     ,
 264                 ".avs"     , ".AVS"     ,
 265                 ".dts"     , ".DTS"     ,
 266                 ".flv"     , ".FLV"     ,
 267                 ".m4v"     , ".M4V"     ,
 268                 ".matroska", ".MATROSKA",
 269                 ".h264"    , ".H264"    ,
 270                 ".dv"      , ".DV"      ,
 271                 ".dirac"   , ".DIRAC"   ,
 272                 ".webm"    , ".WEBM"    ,
 273         };
 274
 275         for (size_t n = 0; n < sizeof(suffixes)/sizeof(suffixes[0]); ++n) {
 276                 if (file.rfind (suffixes[n]) == file.length() - strlen (suffixes[n])) {
 277                         return true;
 278                 }
 279         }
 280
 281         return false;
 282 }
 283
 284 bool
 285 AddVideoDialog::on_video_filter (const FileFilter::Info& filter_info)
 286 {
 287         return check_video_file_extension(filter_info.filename);
 288 }
 289
 290 std::string
 291 AddVideoDialog::file_name (bool &local_file)
 292 {
 293         int n = notebook.get_current_page ();
 294         if (n == 1 || ! Config->get_video_advanced_setup()) {
 295                 local_file = true;
 296                 return chooser.get_filename();
 297         } else {
 298                 local_file = false;
 299                 Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 300                 if(!iter) return "";
 301
 302                 std::string uri = (*iter)[harvid_list_columns.uri];
 303                 std::string video_server_url = video_get_server_url(Config);
 304
 305                 /* check if video server is running locally */
 306                 if (video_get_docroot(Config).size() > 0
 307                                 && !video_server_url.compare(0, 16, "http://localhost"))
 308                 {
 309                         /* check if the file can be accessed */
 310                         int plen;
 311                         CURL *curl;
 312                         curl = curl_easy_init();
 313                         char *ue = curl_easy_unescape(curl, uri.c_str(), uri.length(), &plen);
 314                         std::string path = video_get_docroot(Config) + ue;
 315                         if (!::access(path.c_str(), R_OK)) {
 316                                 uri = path;
 317                                 local_file = true;
 318                         }
 319                         curl_easy_cleanup(curl);
 320                         curl_free(ue);
 321                 }
 322                 return uri;
 323         }
 324 }
 325
 326 enum VtlImportOption
 327 AddVideoDialog::import_option ()
 328 {
 329         int n = notebook.get_current_page ();
 330         if (n == 0 && Config->get_video_advanced_setup()) { return VTL_IMPORT_NONE; }
 331         return VTL_IMPORT_TRANSCODE;
 332 }
 333
 334 bool
 335 AddVideoDialog::launch_xjadeo ()
 336 {
 337         return xjadeo_checkbox.get_active();
 338 }
 339
 340 bool
 341 AddVideoDialog::auto_set_session_fps ()
 342 {
 343         return set_session_fps_checkbox.get_active();
 344 }
 345
 346 void
 347 AddVideoDialog::set_action_ok (bool yn)
 348 {
 349         if (yn) {
 350                 ok_button->set_sensitive(true);
 351         } else {
 352                 preview_path = "";
 353                 pi_duration.set_text("-");
 354                 pi_aspect.set_text("-");
 355                 pi_fps.set_text("-");
 356                 ok_button->set_sensitive(false);
 357                 imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 358                 video_draw_cross(imgbuf);
 359                 preview_image->set(imgbuf);
 360                 preview_image->show();
 361         }
 362 }
 363
 364 void
 365 AddVideoDialog::file_selection_changed ()
 366 {
 367         if (chooser.get_filename().size() > 0) {
 368                 std::string path = chooser.get_filename();
 369                 bool ok =
 370                                 check_video_file_extension(path)
 371                                 &&  Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 372                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 373                 set_action_ok(ok);
 374                 if (ok) {
 375                         request_preview(video_map_path(video_get_docroot(Config), path));
 376                 }
 377         } else {
 378                 set_action_ok(false);
 379         }
 380 }
 381
 382 void
 383 AddVideoDialog::file_activated ()
 384 {
 385         if (chooser.get_filename().size() > 0) {
 386                 std::string path = chooser.get_filename();
 387                 // TODO check docroot -> set import options
 388                 bool ok =
 389                                 check_video_file_extension(path)
 390                                 &&  Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 391                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 392                 if (ok) {
 393                         Gtk::Dialog::response(RESPONSE_ACCEPT);
 394                 }
 395         }
 396 }
 397
 398 /**** Tree List Interaction ***/
 399
 400 void
 401 AddVideoDialog::harvid_list_view_selected () {
 402         Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 403         // TODO check docroot -> set import options, xjadeo
 404         if(!iter) {
 405                 set_action_ok(false);
 406                 return;
 407         }
 408         if ((std::string)((*iter)[harvid_list_columns.id]) == Stock::DIRECTORY.id) {
 409                 set_action_ok(false);
 410         } else {
 411                 set_action_ok(true);
 412                 request_preview((*iter)[harvid_list_columns.uri]);
 413         }
 414 }
 415
 416 void
 417 AddVideoDialog::harvid_list_view_activated (const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn*) {
 418         Gtk::TreeModel::iterator iter = harvid_list->get_iter(path);
 419         if (!iter) return;
 420         std::string type = (*iter)[harvid_list_columns.id];
 421         std::string url = (*iter)[harvid_list_columns.uri];
 422
 423 #if 0
 424         printf ("A: %s %s %s\n",
 425                         ((std::string)((*iter)[harvid_list_columns.id])).c_str(),
 426                         ((std::string)((*iter)[harvid_list_columns.uri])).c_str(),
 427                         ((std::string)((*iter)[harvid_list_columns.filename])).c_str());
 428 #endif
 429
 430         if (type == Gtk::Stock::DIRECTORY.id) {
 431                 harvid_request(url.c_str());
 432         } else {
 433                 Gtk::Dialog::response(RESPONSE_ACCEPT);
 434         }
 435 }
 436
 437 void
 438 AddVideoDialog::harvid_load_docroot() {
 439         set_action_ok(false);
 440
 441         std::string video_server_url = video_get_server_url(Config);
 442         char url[2048];
 443         snprintf(url, sizeof(url), "%s%sindex/"
 444                 , video_server_url.c_str()
 445                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/");
 446         harvid_request(url);
 447         harvid_initialized = true;
 448 }
 449
 450 bool
 451 AddVideoDialog::page_switch() {
 452         if (notebook.get_current_page () == 1 || Config->get_video_advanced_setup()) {
 453                 file_selection_changed();
 454                 return true;
 455         }
 456
 457         if (harvid_initialized) {
 458                 harvid_list_view_selected();
 459         } else {
 460                 harvid_load_docroot();
 461         }
 462         return true;
 463 }
 464
 465 /**** Harvid HTTP interface ***/
 466 void
 467 AddVideoDialog::harvid_request(std::string u)
 468 {
 469         char url[2048];
 470         int status;
 471         snprintf(url, sizeof(url), "%s?format=csv", u.c_str());
 472
 473         harvid_list->clear();
 474
 475         char *res = curl_http_get(url, &status);
 476         if (status != 200) {
 477                 printf("request failed\n"); // XXX
 478                 harvid_path.set_text(" - request failed -");
 479                 free(res);
 480                 return;
 481         }
 482
 483         /* add up-to-parent */
 484         size_t se = u.find_last_of("/", u.size()-2);
 485         size_t ss = u.find("/index/");
 486         if (se != string::npos && ss != string::npos && se > ss) {
 487                 TreeModel::iterator new_row = harvid_list->append();
 488                 TreeModel::Row row = *new_row;
 489                 row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 490                 row[harvid_list_columns.uri     ] = u.substr(0, se + 1);
 491                 row[harvid_list_columns.filename] = X_("..");
 492         }
 493         if (se != string::npos) {
 494                 int plen;
 495                 std::string path = u.substr(ss + 6);
 496                 CURL *curl;
 497                 curl = curl_easy_init();
 498                 char *ue = curl_easy_unescape(curl, path.c_str(), path.length(), &plen);
 499                 harvid_path.set_text(std::string(ue));
 500                 curl_easy_cleanup(curl);
 501                 curl_free(ue);
 502         } else {
 503                 harvid_path.set_text(" ??? ");
 504         }
 505
 506         if (!res) return;
 507
 508         std::vector<std::vector<std::string> > lines;
 509         ParseCSV(std::string(res), lines);
 510         for (std::vector<std::vector<std::string> >::iterator i = lines.begin(); i != lines.end(); ++i) {
 511                 TreeModel::iterator new_row = harvid_list->append();
 512                 TreeModel::Row row = *new_row;
 513
 514                 if (i->at(0) == X_("D")) {
 515                         row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 516                         row[harvid_list_columns.uri     ] = i->at(1).c_str();
 517                         row[harvid_list_columns.filename] = i->at(2).c_str();
 518                 } else {
 519                         row[harvid_list_columns.id      ] = Gtk::Stock::MEDIA_PLAY.id;
 520                         row[harvid_list_columns.uri     ] = i->at(2).c_str();
 521                         row[harvid_list_columns.filename] = i->at(3).c_str();
 522                 }
 523         }
 524
 525         free(res);
 526 }
 527
 528 void
 529 AddVideoDialog::seek_preview()
 530 {
 531         if (preview_path.size() > 0)
 532                 request_preview(preview_path);
 533 }
 534
 535 void
 536 AddVideoDialog::request_preview(std::string u)
 537 {
 538         std::string video_server_url = video_get_server_url(Config);
 539
 540         double video_file_fps;
 541         long long int video_duration;
 542         double video_start_offset;
 543         double video_aspect_ratio;
 544
 545         int clip_width = PREVIEW_WIDTH;
 546         int clip_height = PREVIEW_HEIGHT;
 547         int clip_xoff, clip_yoff;
 548
 549         if (!video_query_info(video_server_url, u,
 550                         video_file_fps, video_duration, video_start_offset, video_aspect_ratio))
 551         {
 552                 printf("image preview info request failed\n");
 553                 // set_action_ok(false); // XXX only if docroot mismatch
 554                 preview_path = "";
 555                 pi_duration.set_text("-");
 556                 pi_aspect.set_text("-");
 557                 pi_fps.set_text("-");
 558                 return;
 559         }
 560
 561         if ((PREVIEW_WIDTH / (double)PREVIEW_HEIGHT) > video_aspect_ratio ) {
 562                 clip_width = MIN(PREVIEW_WIDTH, rint(clip_height * video_aspect_ratio));
 563         } else {
 564                 clip_height = MIN(PREVIEW_HEIGHT, rint(clip_width / video_aspect_ratio));
 565         }
 566
 567         pi_duration.set_text(string_compose("%1 sec", video_duration / video_file_fps));
 568         pi_aspect.set_text(string_compose("%1", video_aspect_ratio));
 569         pi_fps.set_text(string_compose("%1 fps", video_file_fps));
 570
 571         clip_xoff = (PREVIEW_WIDTH - clip_width)/2;
 572         clip_yoff = (PREVIEW_HEIGHT - clip_height)/2;
 573
 574         char url[2048];
 575         snprintf(url, sizeof(url), "%s%s?frame=%lli&w=%d&h=%di&file=%s&format=rgb"
 576                 , video_server_url.c_str()
 577                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/"
 578                 , (long long) (video_duration * seek_slider.get_value() / 1000.0)
 579                 , clip_width, clip_height, u.c_str());
 580
 581         char *data = curl_http_get(url, NULL);
 582         if (!data) {
 583                 printf("image preview request failed %s\n", url);
 584                 imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 585                 video_draw_cross(imgbuf);
 586                 preview_path = "";
 587         } else {
 588                 Glib::RefPtr<Gdk::Pixbuf> tmp;
 589                 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, false, 8, clip_width, clip_height, clip_width*3);
 590                 if (clip_width != PREVIEW_WIDTH || clip_height != PREVIEW_HEIGHT) {
 591                         imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 592                 }
 593                 tmp->copy_area (0, 0, clip_width, clip_height, imgbuf, clip_xoff, clip_yoff);
 594                 preview_path = u;
 595                 free(data);
 596         }
 597         preview_image->set(imgbuf);
 598         preview_image->show();
 599 }
 600
 601 #endif /* WITH_VIDEOTIMELINE */