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Add getters for number of decoded or generated frames

Fit to FFmpeg 5.x API

Fix video filters (after audio filters memory leak fix) https://github.com/avTranscoder/avTranscoder/pull/324

Fix audio filters memory leak #323

Fix: stop the process even if the wrapper expects more data https://github.com/avTranscoder/avTranscoder/pull/322

Fix video filter graph memory usage #319 Fix codec latency in positive offset #320

• Fix some deprecation warnings
• Fix Java binding for InputStream::addPacket()
• Fix AudioGenerator usage after transcoding
• Fix number of samples computing into AudioProperties

• FFmpeg 4 support
• Custom encoder can be specified to the Transcoder streams
• Add audio phase meter application

• Fix filter graph memory usage (unreleased v0.14.1)
• Correctly retrieve the file size on 32 bits OS (unreleased v0.14.2)
• Fix SWIG uint64_t type handling
• Fix travis CI