After Handbrake has encoded the file, there are important data missing, like "Recorded date" and "Encoding settings" of the original (see below). So I ask to keep this data somehow.
I think there could be a query for "dv" and then a check, if "Recorded date" exists. A non empty "Recorded date" should be written in the Handbrake-file. Maybe it is a good idea to keep "Recorded date" generally too.
Encoding settings changes after Handbrake encoded the file, so there must be a new fieldname like "DV original encoding settings" (or whatever).
Most important is "Recorded date", since it is the only way to determine the order of (thousands of) the clips, if the filename gets broken somehow after the file has been renamed by a broken script, eg.
mediainfo dvtest_001_20100216214015.000-720x576i-169-25fps-dv1-32khz-4s40ms.avi General
Complete name : dvtest_001_20100216214015.000-720x576i-169-25fps-dv1-32khz-4s40ms.avi
Format : AVI
Format/Info : Audio Video Interleave
Format_Commercial_IfAny : DVCPRO
File size : 13.9 MiB
Duration : 4s 40ms
Overall bit rate mode : Constant
Overall bit rate : 28.9 Mbps
Recorded date : 2010-02-16 21:40:15.000
Video
ID : 0
Format : DV
Format_Commercial_IfAny : DVCPRO
Duration : 4s 40ms
Bit rate mode : Constant
Bit rate : 24.4 Mbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Standard : PAL
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Compression mode : Lossy
Bits/(Pixel*Frame) : 2.357
Stream size : 13.9 MiB (100%)
Encoding settings : ae mode=full automatic / wb mode=automatic / white balance= / fcm=manual focus
Audio #1
ID : 0-0
Format : PCM
Muxing mode : DV
Muxing mode, more info : Muxed in Video #1
Duration : 4s 40ms
Bit rate mode : Constant
Bit rate : 768 Kbps
Channel(s) : 2 channels
Sampling rate : 32.0 KHz
Bit depth : 12 bits
Stream size : 0.00 Byte (0%)
Audio #2
ID : 0-1
Format : PCM
Muxing mode : DV
Muxing mode, more info : Muxed in Video #1
Duration : 4s 40ms
Bit rate mode : Constant
Bit rate : 768 Kbps
Channel(s) : 2 channels
Sampling rate : 32.0 KHz
Bit depth : 12 bits
Stream size : 0.00 Byte (0%)