Hi All, From below link i saw that mp4 container can have h264 as video codec and opus as audio codec. so i tried both codecs in to mp4 using ffmpeg, but external player like mplayer, vlc and kmp are failing to decode voice . i.e while playing mp4 file there is only video no voice. https://en.wikipedia.org/wiki/Comparison_of_video_container_formats
Procedure followed using ffmpeg: 1. From sample mp4 file, i have separated audio(aac codec) and video(h264) in to different files . 2. aac trans-coded to opus 3. tried to merge video and audio(opus) in to single mp4 please let me know 1. whether ffmpeg support above codecs in single mp4 file or issue with external player . If anyone has mp4 file with h264 and opus codecs please provide me along with procedure to convert. Thanks & Regards Vittal Prasad B R _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel