Revert "delete sqls"

This reverts commit c13b62cd248fe61cf4ae12d838e8356aa728023e.
Revert "Update ffmpeg_audio_channles_conversion.bat"

This reverts commit 33d2ca969ca8f5da21a50445ea1f99dc7347d698.
Revert "Initial commit"

This reverts commit d23694cb6c68c41dc88a46ffb24f12728dede2c1.