Fix proxy creation not restarting when changing a property while creating proxy

src/bin/bin.cpp

@@ -2504,9 +2504,9 @@ void Bin::refreshClipMarkers(const QString &id)
     }
 }
 
-void Bin::discardJobs(const QString &id, AbstractClipJob::JOBTYPE type)
+bool Bin::discardJobs(const QString &id, AbstractClipJob::JOBTYPE type)
 {
-    m_jobManager->discardJobs(id, type);
+    return m_jobManager->discardJobs(id, type);
 }
 
 void Bin::slotStartCutJob(const QString &id)

src/bin/bin.h

@@ -214,8 +214,10 @@ public:
     /** @brief Start a job of selected type for a clip  */
     void startJob(const QString &id, AbstractClipJob::JOBTYPE type);
 
-    /** @brief Discard jobs from a chosen type, use NOJOBTYPE to discard all jobs for this clip */
-    void discardJobs(const QString &id, AbstractClipJob::JOBTYPE type = AbstractClipJob::NOJOBTYPE);
+    /** @brief Discard jobs from a chosen type, use NOJOBTYPE to discard all jobs for this clip 
+     *  @returns true if a job was found and discarded
+     */
+    bool discardJobs(const QString &id, AbstractClipJob::JOBTYPE type = AbstractClipJob::NOJOBTYPE);
 
     /** @brief Check if there is a job waiting / running for this clip  */
     bool hasPendingJob(const QString &id, AbstractClipJob::JOBTYPE type);

src/bin/projectclip.cpp

@@ -282,8 +282,17 @@ void ProjectClip::reloadProducer(bool refreshOnly)
         // set a special flag to request thumbnail only
         xml.setAttribute(QStringLiteral("refreshOnly"), QStringLiteral("1"));
     } else {
-        bin()->discardJobs(m_id, AbstractClipJob::PROXYJOB);
-        if (hasProxy()) {
+        if (bin()->discardJobs(m_id, AbstractClipJob::PROXYJOB)) {
+            // A proxy job was running, reset proxy property to trigger proxy creation
+            QString path = getProducerProperty(QStringLiteral("_proxy"));
+            if (!path.isEmpty()) {
+                EffectsList::setProperty(xml, QStringLiteral("kdenlive:proxy"), path.toUtf8().constData());
+            }
+            // If we have a proxy, delete it
+            xml.setAttribute(QStringLiteral("overwriteproxy"), QStringLiteral("1"));
+            setProducerProperty(QStringLiteral("_overwriteproxy"), QStringLiteral("1"));
+        }
+        else if (hasProxy()) {
             // If we have a proxy, delete it
             xml.setAttribute(QStringLiteral("overwriteproxy"), QStringLiteral("1"));
             setProducerProperty(QStringLiteral("_overwriteproxy"), QStringLiteral("1"));

src/mltcontroller/producerqueue.cpp

@@ -194,6 +194,8 @@ void ProducerQueue::processFileProperties()
                 if (QFileInfo(path).size() <= 0 || info.xml.hasAttribute(QStringLiteral("overwriteproxy"))) {
                     // proxy is missing, re-create it
                     emit requestProxy(info.clipId);
+                    m_processingClipId.removeAll(info.clipId);
+                    continue;
                     proxyProducer = false;
                     //path = info.xml.attribute("resource");
                     path = ProjectClip::getXmlProperty(info.xml, QStringLiteral("resource"));

src/project/jobs/jobmanager.cpp

@@ -81,7 +81,7 @@ QStringList JobManager::getPendingJobs(const QString &id)
     return result;
 }
 
-void JobManager::discardJobs(const QString &id, AbstractClipJob::JOBTYPE type)
+bool JobManager::discardJobs(const QString &id, AbstractClipJob::JOBTYPE type)
 {
     QMutexLocker lock(&m_jobMutex);
     bool jobFound = false;
@@ -96,6 +96,7 @@ void JobManager::discardJobs(const QString &id, AbstractClipJob::JOBTYPE type)
         emit updateJobStatus(id, type, JobAborted);
         updateJobCount();
     }
+    return jobFound;
 }
 
 bool JobManager::hasPendingJob(const QString &clipId, AbstractClipJob::JOBTYPE type)

src/project/jobs/jobmanager.h

@@ -50,8 +50,9 @@ public:
     /** @brief Discard specific job type for a clip.
      *  @param id the clip id
      *  @param type The type of job that you want to abort, leave to NOJOBTYPE to abort all jobs
+     *  @returns true if a job was found and discarded
      */
-    void discardJobs(const QString &id, AbstractClipJob::JOBTYPE type = AbstractClipJob::NOJOBTYPE);
+    bool discardJobs(const QString &id, AbstractClipJob::JOBTYPE type = AbstractClipJob::NOJOBTYPE);
 
     /** @brief Check if there is a pending / running job a clip.
      *  @param id the clip id

src/project/jobs/proxyclipjob.cpp

@@ -334,11 +334,13 @@ QHash<ProjectClip *, AbstractClipJob *> ProxyJob::prepareJob(Bin *bin, const QLi
             local_params.append(QStringLiteral(" -noautorotate"));
         }
         QString path = item->getProducerProperty(QStringLiteral("kdenlive:proxy"));
-        if (path.isEmpty()) {
+        if (path.isEmpty() || path.length() < 3) path = item->getProducerProperty(QStringLiteral("_proxy"));
+        if (path.isEmpty() || path.length() < 3) {
             item->setJobStatus(AbstractClipJob::PROXYJOB, JobCrashed, -1, i18n("Failed to create proxy, empty path."));
             continue;
         }
         // Reset proxy path until it is really created
+        item->setProducerProperty(QStringLiteral("_proxy"), path.toUtf8().constData());
         item->setProducerProperty(QStringLiteral("kdenlive:proxy"), QString());
         if (item->getProducerIntProperty(QStringLiteral("_overwriteproxy")) == 0 && QFileInfo(path).size() > 0) {
             // Proxy already created