[mythtv-users] Suggest transcode settings

[Phil Wild]

Hi,

I have a heap of home video I want to transcode. Currently the files are
consuming around 12GB per hour. I'd like to get that down to around
2-3GB/hour without losing too much quality. I'd also prefer not to drop the
resolution but rather increase/change compression algorithms etc.

I've been googling but haven't found anything really helpful yet. I'm sure
one of the very smart people on here can give me an answer from their heads
and save me a heap of time trial/erroring etc.

I'm guessing ffmpeg is the best tool for the job?

This is the output from exiftool for one of my files

phil at mythtv:/usbdata/videos/OurVideos/UnProcessed/2011-07-29-on/Original
Media$ exiftool 2011-07-29\ 16_28_04\ \(id\).mov

ExifTool Version Number         : 8.60
File Name                       : 2011-07-29 16_28_04 (id).mov
Directory                       : .
File Size                       : 167 MB
File Modification Date/Time     : 2014:01:31 22:15:52+08:00
File Permissions                : rw-rwxr--
File Type                       : MOV
MIME Type                       : video/quicktime
Major Brand                     : Apple QuickTime (.MOV/QT)
Minor Version                   : 0.0.0
Compatible Brands               : qt
Movie Data Size                 : 175276000
Movie Header Version            : 0
Create Date                     : 2014:01:31 14:15:52
Modify Date                     : 2014:01:31 14:16:41
Time Scale                      : 2500
Duration                        : 0:00:49
Preferred Rate                  : 1
Preferred Volume                : 100.00%
Preview Time                    : 0 s
Preview Duration                : 0 s
Poster Time                     : 0 s
Selection Time                  : 0 s
Selection Duration              : 0 s
Current Time                    : 0 s
Next Track ID                   : 4
Track Header Version            : 0
Track Create Date               : 2014:01:31 14:15:52
Track Modify Date               : 2014:01:31 14:16:41
Track ID                        : 1
Track Duration                  : 0:00:49
Track Layer                     : 0
Track Volume                    : 0.00%
Image Width                     : 1440
Image Height                    : 1080
Graphics Mode                   : ditherCopy
Op Color                        : 32768 32768 32768
Compressor ID                   : hdv3
Vendor ID                       : Apple
Source Image Width              : 1440
Source Image Height             : 1080
X Resolution                    : 72
Y Resolution                    : 72
Compressor Name                 : HDV 1080i50
Bit Depth                       : 24
Video Frame Rate                : 25
Balance                         : 0
Audio Channels                  : 2
Audio Bits Per Sample           : 16
Audio Sample Rate               : 48000
Audio Format                    : wave
Matrix Structure                : 1 0 0 0 1 0 0 0 1
Media Header Version            : 0
Media Create Date               : 2014:01:31 14:15:52
Media Modify Date               : 2014:01:31 14:16:41
Media Time Scale                : 2500
Media Duration                  : 0:00:49
Media Language Code             : und
Gen Media Version               : 0
Gen Flags                       : 0 0 0
Gen Graphics Mode               : ditherCopy
Gen Op Color                    : 32768 32768 32768
Gen Balance                     : 0
Handler Class                   : Data Handler
Handler Vendor ID               : Apple
Handler Description             : Core Media Data Handler
Other Format                    : tmcd
Handler Type                    : Metadata Tags
Com Apple Proapps Camera ID (und-AU): 0x800460104f44e1c
Com Apple Proapps Camera Name (und-AU): Sony HDV-VCR
Com Apple Proapps Clip ID (und-AU): 748C35DF-2B0A-4F43-A692-12529F1D2A5D
Com Apple Proapps Ingest Date Description (und-AU): 2014-01-31 22:15:52
+0800
Com Apple Proapps Original Format (und-AU): HDV 1080i50
Com Apple Proapps Media Rate (und-AU): 25
Com Apple Proapps Timecode Format (und-AU): Non-Drop
Creation Date (und-AU)          : 2011:07:29 16:28:04+08:00
Make (und-AU)                   : Apple
Model (und-AU)                  : Macmini5,1
Software (und-AU)               : Mac OS X 10.9.1 (13B42)
Avg Bitrate                     : 28.4 Mbps
Image Size                      : 1440x1080
Rotation                        : 0
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