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‘C – 4 video dubbed, gunshot sounds added’
… It never came from a mobile phone


Siri Hewawitharana, a Sri Lankan IT expert, who recently exposed Channel 4 execution video as a fake, further points out that it was dubbed to give the effect of gunshot sounds. He rules out that the video was originally done by a mobile phone camera and insists that a high quality video camera was used for that purpose. It has later been transferred to a mobile phone, he says. The poor quality dubbing, he says, betrays the fact that it was not handled by specialists.

Hewawitharana, a former head of Cisco’s global broadcast and digital video practice, has functioned in a number of significant business development and technical leadership positions with some of the world’s most successful telecommunication and broadcasting organisations. He was head of systems engineering for Star TV Hong Kong, head of visual communication for OTC and director of engineering for WIN TV. As chief architect of Optus’ Network Systems Design Broadcast and Satellite TV operation, Hewawitharana was responsible for creating and operating Optus’ $47 million Pay TV Video Operations Centre.

Hewawitharana says:

Channel 4 says the video at issue came from a mobile phone video source. There are only two formats in mobile video formats. One is an old 3GPP format and the other an advanced Mpeg4, H-264 part 10, which is MP4 format that is highly processor intensive encoding and due to this, mobile phones in the present markets do not produce high quality videos. Such processors are not so powerful as to produce good quality video contrary to the Channel 4 claim.

Channel 4 video is of a higher quality than the ones the existing Smart phones can create today.

Within H-264 coding, we also have extra component called Motion Vectors (VMC) used to predict motion on temporal and spatial domain. The Channel 4 video has quite high quality VMC, which came from a video camera and not certainly from a mobile phone source. Mobile source also tends to be blocky in nature when it comes to motion.

Since original video is from AVI and QuickTime format, that indicates the original video is of high quality and came from a video camera source since mobile formats do not use AVI or Quicktime which are high quality video formats.

If they had changed the mobile format to AVI or QT then the final video would have been of poor quality. In the technical analysis it was found that the AVI and QT formats were of very high quality.

It is also quite explicit that the camcorder video was transferred to a computer for editing and sound was dubbed later and gun shots were not in synchronism with the video and normally audio is always way ahead of the video since video processing takes time and in this case the audio is very late indicating a very amateurish video and audio editing.

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