Answer for How to: Speex in RTMP stream and HLS Written by dan-daemon on 9 Jun 2014. Posted in As I understand EMS, I just can replace ‘evo-avconv’ utility with ‘avconv’ or even with ‘ffmpeg’. Since I have H264+Speex 16K then ffmpeg with libspeex enabled must help me to transcode H264+Speex to H263+AAC. Am I on correct way?