- float progress_remaining = 1;
-
- /* Set the film's length to either
- a) a length judged by running through the content or
- b) the length from a decoder's header.
- */
-
- if (!_film->trust_content_header()) {
- /* Decode the content to get an accurate length */
-
- /* We don't want to use any existing length here, as progress
- will be messed up.
- */
- _film->unset_length ();
-
- shared_ptr<Options> o (new Options ("", "", ""));
- o->out_size = Size (512, 512);
- o->apply_crop = false;
- o->decode_audio = false;
-
- descend (0.5);
-
- pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > decoders = decoder_factory (_film, o, this);
-
- set_progress_unknown ();
- while (!decoders.first->pass()) {
- /* keep going */
- }
-
- _film->set_length (decoders.first->video_frame());
-
- _film->log()->log (String::compose ("Video length examined as %1 frames", _film->length().get()));
-
- ascend ();
-
- progress_remaining -= 0.5;
-
- } else {
-
- /* Get a quick decoder to get the content's length from its header.
- It would have been nice to just use the thumbnail transcoder's decoder,
- but that's a bit fiddly, and this isn't too expensive.
- */
-
- shared_ptr<Options> o (new Options ("", "", ""));
- o->out_size = Size (1024, 1024);
- pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > d = decoder_factory (_film, o, 0);
- _film->set_length (d.first->length());
-
- _film->log()->log (String::compose ("Video length obtained from header as %1 frames", _film->length().get()));
- }
-
- /* Now make thumbnails for it */
-
- descend (progress_remaining);
-
- try {
- shared_ptr<Options> o (new Options (_film->dir ("thumbs"), ".png", ""));
- o->out_size = _film->size ();
- o->apply_crop = false;
- o->decode_audio = false;
- o->decode_video_skip = _film->length().get() / 128;
- o->decode_subtitles = true;
- shared_ptr<ImageMagickEncoder> e (new ImageMagickEncoder (_film, o));
- Transcoder w (_film, o, this, e);
- w.go ();
-
- /* Now set the film's length from the transcoder's decoder, since we
- went to all the trouble of going through the content.
- */
-
- _film->set_length (w.video_decoder()->video_frame());
-
- } catch (std::exception& e) {
-
- ascend ();
- set_progress (1);
- set_error (e.what ());
- set_state (FINISHED_ERROR);
- return;
-
- }
-
- string const tdir = _film->dir ("thumbs");
- vector<SourceFrame> thumbs;
-
- for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (tdir); i != boost::filesystem::directory_iterator(); ++i) {
-
- /* Aah, the sweet smell of progress */
-#if BOOST_FILESYSTEM_VERSION == 3
- string const l = boost::filesystem::path(*i).leaf().generic_string();
-#else
- string const l = i->leaf ();
-#endif
-
- size_t const d = l.find (".png");
- size_t const t = l.find (".tmp");
- if (d != string::npos && t == string::npos) {
- thumbs.push_back (atoi (l.substr (0, d).c_str()));
- }
- }
-
- sort (thumbs.begin(), thumbs.end());
- _film->set_thumbs (thumbs);
-
- ascend ();