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diff --git a/src/lib/j2k_video_encoder.cc b/src/lib/j2k_video_encoder.cc
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+/*
+ Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file src/j2k_video_encoder.cc
+ * @brief An encoder which writes JPEG2000 files, where they are video (ie not still).
+ */
+
+#include <sstream>
+#include <stdexcept>
+#include <iomanip>
+#include <iostream>
+#include <boost/thread.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/lexical_cast.hpp>
+#include <sndfile.h>
+#include <openjpeg.h>
+#include "j2k_video_encoder.h"
+#include "config.h"
+#include "options.h"
+#include "exceptions.h"
+#include "dcp_video_frame.h"
+#include "server.h"
+#include "filter.h"
+#include "log.h"
+#include "cross.h"
+#include "film.h"
+
+using std::string;
+using std::stringstream;
+using std::list;
+using std::vector;
+using std::pair;
+using std::cout;
+using boost::shared_ptr;
+using boost::thread;
+using boost::lexical_cast;
+
+J2KVideoEncoder::J2KVideoEncoder (shared_ptr<const Film> f, shared_ptr<const EncodeOptions> o)
+ : Encoder (f, o)
+ , _process_end (false)
+{
+
+}
+
+J2KVideoEncoder::~J2KVideoEncoder ()
+{
+ terminate_worker_threads ();
+}
+
+void
+J2KVideoEncoder::terminate_worker_threads ()
+{
+ boost::mutex::scoped_lock lock (_worker_mutex);
+ _process_end = true;
+ _worker_condition.notify_all ();
+ lock.unlock ();
+
+ for (list<boost::thread *>::iterator i = _worker_threads.begin(); i != _worker_threads.end(); ++i) {
+ (*i)->join ();
+ delete *i;
+ }
+}
+
+void
+J2KVideoEncoder::do_process_video (shared_ptr<Image> yuv, shared_ptr<Subtitle> sub)
+{
+ boost::mutex::scoped_lock lock (_worker_mutex);
+
+ /* Wait until the queue has gone down a bit */
+ while (_queue.size() >= _worker_threads.size() * 2 && !_process_end) {
+ TIMING ("decoder sleeps with queue of %1", _queue.size());
+ _worker_condition.wait (lock);
+ TIMING ("decoder wakes with queue of %1", _queue.size());
+ }
+
+ if (_process_end) {
+ return;
+ }
+
+ /* Only do the processing if we don't already have a file for this frame */
+ if (!boost::filesystem::exists (_opt->frame_out_path (_video_frame, false))) {
+ pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
+ TIMING ("adding to queue of %1", _queue.size ());
+ _queue.push_back (boost::shared_ptr<DCPVideoFrame> (
+ new DCPVideoFrame (
+ yuv, sub, _opt->out_size, _opt->padding, _film->subtitle_offset(), _film->subtitle_scale(),
+ _film->scaler(), _video_frame, _film->frames_per_second(), s.second,
+ Config::instance()->colour_lut_index (), Config::instance()->j2k_bandwidth (),
+ _film->log()
+ )
+ ));
+
+ _worker_condition.notify_all ();
+ } else {
+ frame_skipped ();
+ }
+}
+
+void
+J2KVideoEncoder::encoder_thread (ServerDescription* server)
+{
+ /* Number of seconds that we currently wait between attempts
+ to connect to the server; not relevant for localhost
+ encodings.
+ */
+ int remote_backoff = 0;
+
+ while (1) {
+
+ TIMING ("encoder thread %1 sleeps", boost::this_thread::get_id());
+ boost::mutex::scoped_lock lock (_worker_mutex);
+ while (_queue.empty () && !_process_end) {
+ _worker_condition.wait (lock);
+ }
+
+ if (_process_end) {
+ return;
+ }
+
+ TIMING ("encoder thread %1 wakes with queue of %2", boost::this_thread::get_id(), _queue.size());
+ boost::shared_ptr<DCPVideoFrame> vf = _queue.front ();
+ _film->log()->log (String::compose ("Encoder thread %1 pops frame %2 from queue", boost::this_thread::get_id(), vf->frame()), Log::VERBOSE);
+ _queue.pop_front ();
+
+ lock.unlock ();
+
+ shared_ptr<EncodedData> encoded;
+
+ if (server) {
+ try {
+ encoded = vf->encode_remotely (server);
+
+ if (remote_backoff > 0) {
+ _film->log()->log (String::compose ("%1 was lost, but now she is found; removing backoff", server->host_name ()));
+ }
+
+ /* This job succeeded, so remove any backoff */
+ remote_backoff = 0;
+
+ } catch (std::exception& e) {
+ if (remote_backoff < 60) {
+ /* back off more */
+ remote_backoff += 10;
+ }
+ _film->log()->log (
+ String::compose (
+ "Remote encode of %1 on %2 failed (%3); thread sleeping for %4s",
+ vf->frame(), server->host_name(), e.what(), remote_backoff)
+ );
+ }
+
+ } else {
+ try {
+ TIMING ("encoder thread %1 begins local encode of %2", boost::this_thread::get_id(), vf->frame());
+ encoded = vf->encode_locally ();
+ TIMING ("encoder thread %1 finishes local encode of %2", boost::this_thread::get_id(), vf->frame());
+ } catch (std::exception& e) {
+ _film->log()->log (String::compose ("Local encode failed (%1)", e.what ()));
+ }
+ }
+
+ if (encoded) {
+ encoded->write (_opt, vf->frame ());
+ frame_done ();
+ } else {
+ lock.lock ();
+ _film->log()->log (
+ String::compose ("Encoder thread %1 pushes frame %2 back onto queue after failure", boost::this_thread::get_id(), vf->frame())
+ );
+ _queue.push_front (vf);
+ lock.unlock ();
+ }
+
+ if (remote_backoff > 0) {
+ dvdomatic_sleep (remote_backoff);
+ }
+
+ lock.lock ();
+ _worker_condition.notify_all ();
+ }
+}
+
+void
+J2KVideoEncoder::process_begin ()
+{
+ Encoder::process_begin ();
+
+ for (int i = 0; i < Config::instance()->num_local_encoding_threads (); ++i) {
+ _worker_threads.push_back (new boost::thread (boost::bind (&J2KVideoEncoder::encoder_thread, this, (ServerDescription *) 0)));
+ }
+
+ vector<ServerDescription*> servers = Config::instance()->servers ();
+
+ for (vector<ServerDescription*>::iterator i = servers.begin(); i != servers.end(); ++i) {
+ for (int j = 0; j < (*i)->threads (); ++j) {
+ _worker_threads.push_back (new boost::thread (boost::bind (&J2KVideoEncoder::encoder_thread, this, *i)));
+ }
+ }
+}
+
+void
+J2KVideoEncoder::process_end ()
+{
+ Encoder::process_end ();
+
+ boost::mutex::scoped_lock lock (_worker_mutex);
+
+ _film->log()->log ("Clearing queue of " + lexical_cast<string> (_queue.size ()));
+
+ /* Keep waking workers until the queue is empty */
+ while (!_queue.empty ()) {
+ _film->log()->log ("Waking with " + lexical_cast<string> (_queue.size ()), Log::VERBOSE);
+ _worker_condition.notify_all ();
+ _worker_condition.wait (lock);
+ }
+
+ lock.unlock ();
+
+ terminate_worker_threads ();
+
+ _film->log()->log ("Mopping up " + lexical_cast<string> (_queue.size()));
+
+ /* The following sequence of events can occur in the above code:
+ 1. a remote worker takes the last image off the queue
+ 2. the loop above terminates
+ 3. the remote worker fails to encode the image and puts it back on the queue
+ 4. the remote worker is then terminated by terminate_worker_threads
+
+ So just mop up anything left in the queue here.
+ */
+
+ for (list<shared_ptr<DCPVideoFrame> >::iterator i = _queue.begin(); i != _queue.end(); ++i) {
+ _film->log()->log (String::compose ("Encode left-over frame %1", (*i)->frame ()));
+ try {
+ shared_ptr<EncodedData> e = (*i)->encode_locally ();
+ e->write (_opt, (*i)->frame ());
+ frame_done ();
+ } catch (std::exception& e) {
+ _film->log()->log (String::compose ("Local encode failed (%1)", e.what ()));
+ }
+ }
+}
+
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