Please note that the installation of video codec pack is only valid on our current PC and it may not be compatible with other applications. Also beware of the downloaded codec pack that may be bundled with malware if we didn’t download it from the official sites. To avoid those risks, downloading players with self-contained media codec pack such as VLC, PotPlayer, KMPlayer can be a good alternative.
Apart from downloading a codec pack to fix the playback issue, you can try another efficient approach - transcoding the video/audio to supported formats for smooth playback without a hitch. WonderFox HD Video Converter Factory Pro is the best codec pack alternative which has rich built-in video and audio codec packs. It can help you permanently transcode your video/audio to 500+ formats and devices so as to fix the playback issue. For example, you can transcode RMVB to MP4, MP3, etc. Now, get this software for preparation and follow the given instructions below.