Problematic Video Sources
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CCTV systems - Videos from surveillance systems are usually causing a lot of trouble. Most of those systems are not able to create videos that are suitable for observation.
Known issues are:
o'Videos' are stored in a special data base like structure of images, which requires you to export the previously recorded videos. This is a time consuming process and seldom successful, due to the issues that follow.
oTime limited export that allows only the export of a few minutes at a time.
oExport limited by file size instead of duration, resulting in videos with different duration, which makes it next to impossible to synchronize them.
oExported videos are created in a CCTV system specific video codec that can only be handled by the system specific player.
oDatabase-based storage of time information, resulting in videos that cannot be controlled accurately without the system specific player, even if a compatible DirectShow codec is available.
oLength of exported video does not match the real time duration, because of variable frame rates that can only be interpreted correctly by the system specific player in combination with the time information mentioned before.
oConversion is hardly ever an option, because of the timing issues listed before. Only an accurate export routine from the CCTV system may result in usable videos.
| Hikvision recording systems, those systems have a long history of producing uncontrollable video footage. Videos recorded by some camera/recording combinations just can’t be controlled accurately and conversion is required! |
| DVD recording systems, because they usually create *.VOB files that require an Index file that can only be read by a true DVD player. |