[Start-Export] Support Mp4

[djarbz]

We have a use case that requires us to periodically export footage from certain cameras.
The ingestor requires mp4 formatted video.

My current plan of attack is to export the MKV and then use FFMPEG to convert to MP4, but this would be simplified a lot if the command was updated to support the MP4 export directly.

From my understanding, the option is available in the SDK, just not exposed in the command.

[joshooaj]

The Smart Client supports export to mp4 now, but the SDK does not. At least not the last time I looked, and a search for "MP4" doesn't return any hits at https://doc.developer.milestonesys.com/mipsdk/index.html?base=content_blank.html&tree=tree_Search.html yet.

In Smart Client we actually use ffmpeg to repackage the output of the MKVExporter class.

I'm hesitant to add a dependency on ffmpeg as the module is already pretty bulky for a powershell module, but I wonder if a new version of the export command could support the mp4 extension as long as ffmpeg is found in PATH? If it's available, then we use it to repackage the MKV export?

[djarbz]

I'm hesitant to add a dependency on ffmpeg as the module is already pretty bulky for a powershell module, but I wonder if a new version of the export command could support the mp4 extension as long as ffmpeg is found in PATH? If it's available, then we use it to repackage the MKV export?

I would be ok with this, then throw an error if ffmpeg is not found.