AV_CH_BACK_LEFT    53 extra_lib/include/ffmpeg_android/libavutil/channel_layout.h #define AV_CH_BACK_LEFT              0x00000010
AV_CH_BACK_LEFT   275 extra_lib/include/ffmpeg_android/libavutil/channel_layout.h #define AV_CH_BACK_LEFT              0x00000010
AV_CH_BACK_LEFT    53 extra_lib/include/libavutil/channel_layout.h #define AV_CH_BACK_LEFT              0x00000010