code: private void postInitialize() {
          if (log.isDebugEnabled()) {
              log.debug("FLVReader 1 - Buffer size: {} position: {} remaining: {}", new Object[] { getTotalBytes(), getCurrentPosition(), getRemainingBytes() });
          }
          if (getRemainingBytes() >= 9) {
              decodeHeader();
          }
          if (file != null) {
              keyframeMeta = analyzeKeyFrames();
          }
          long old = getCurrentPosition();
          log.debug("Position: {}", old);
      }
docs: Post-initialization hook, reads keyframe metadata and decodes header (if any).