In IPP 5.3 audio-video-codecs sample we do not provide support for 3GP container format. Sometime it is possible to decode such files with simple player because similarity with MP4 format. But we do not guarantee splitter will work with any 3GP compliant file.
From the other hand, umc_video_enc_con application can produce only raw video stream on output because it does not use muxer component (for simplicicty reasons). It is intended to demonstarte how to use UMC video encoders.