encoder: close io if file

Change-Id: I2b901f56b82ce5206314a1f87a878818cc1fc46c

src/media/media_encoder.cpp

@@ -64,6 +64,9 @@ MediaEncoder::~MediaEncoder()
     if (outputCtx_) {
         if (outputCtx_->priv_data)
             av_write_trailer(outputCtx_);
+        if (fileIO_) {
+            avio_close(outputCtx_->pb);
+        }
         for (auto encoderCtx : encoders_) {
             if (encoderCtx) {
 #ifndef _MSC_VER
@@ -354,6 +357,7 @@ MediaEncoder::openIOContext()
         const char* filename = outputCtx_->filename;
 #endif
         if (!(outputCtx_->oformat->flags & AVFMT_NOFILE)) {
+            fileIO_ = true;
             if ((ret = avio_open(&outputCtx_->pb, filename, AVIO_FLAG_WRITE)) < 0) {
                 std::stringstream ss;
                 ss << "Could not open IO context for '" << filename << "': " << libav_utils::getError(ret);

src/media/media_encoder.h

@@ -123,6 +123,7 @@ private:
     int currentStreamIdx_ = -1;
     unsigned sent_samples = 0;
     bool initialized_ {false};
+    bool fileIO_ {false};
 
 #ifdef ENABLE_VIDEO
     video::VideoScaler scaler_;