I used the ATV3 settings in hand brake and I'm just puzzled how the file size has been reduced so much when the quality seems the same, can anyone shed some light on this?
I used the ATV3 settings in hand brake and I'm just puzzled how the file size has been reduced so much when the quality seems the same, can anyone shed some light on this?
I think that is reasonable. A lot of my dvd are 1GB from 5-6GB. It really varies because of the source, but if I got that I would not even question it.
Video DVDs use the MPEG-2 codec (old), which is not that space efficient and are from 4 to 8 GB in size, .mp4 files use the H.264 codec (newer MPEG-4 codec), which is quite space efficient, thus the smaller file size. .mkv files typically use H.264 or x264 (also an MPEG-4 codec), thus a file size reduction might also come with a reduction in visible image quality or even resolution reduction.
MPEG2 is not old, it's currently in use on every standard dvd. h.264 is used on BR's as they are compressed from original material. Only torrented mkv's are h.264 which means they have been compressed from a mpeg2 or BR. What's your point?
In order to find out, what is the cause of the file size reduction (it is a lowered bitrate), you can use the following three applications to analyse the source .mkv and resulting .mp4.
- VideoSpec (free)
- MediaInfo (free)
- Media Inspector (2.99 USD in the Mac App Store (MAS))
When done, you can use the "Report" (VideoSpec) and "Export" (Media Inspector) button to export a report,
attachable to your next post via the Image button.
In MediaInfo you have to go to the Menu Bar, select View > Text and copy the text via CMD+A > CMD+C and paste it via CMD+V into your next post.
***** Analyzed File Results *****
*** General Parameters ***
- Name: fhd-antichrist.1080p.mkv
- Container: Matroska
- Size: 9.395 GB
- Duration: 1h 44mn
- Bitrate: 12.0 Mbps
*** Video Track Parameters ***
- Format: H.264/MPEG-4 AVC
- Bitrate: Max.: Undefined / Average: 9 012 Kbps / Min.: Undefined
- Frame rate (fps): Max.: Undefined / Average: 25.000 / Min.: Undefined
- Encoding profile: High@L4.1
- Image size: 1920*816
- Pixel Aspect Ratio: Undefined
- Display Aspect Ratio: 2.35:1
- Interlacing: Progressive
*** First Audio Track Parameters ***
- Format: DTS Coherent Acoustics
- Bitrate: 1 510 Kbps
- Resolution: 16 bits
- Rate: 48.0 KHz
- Channel(s): 5:1 - 6 channels
- Position: Front: L C R, Side: L R, LFE
*** Miscellaneous ***
- Subtitle(s): #1 : UTF-8 - French / #2 : UTF-8 - French /
- Album: Undefined
- Performer: Undefined
- Genre: Undefined
- Encoded date: UTC 2009-11-04 23:04:58
- Album artist: Undefined
***** Analyzed File Results *****
*** General Parameters ***
- Name: Antichrist 1080p.m4v
- Container: M4V - QuickTime
- Size: 3.21 GB
- Duration: 1h 44mn
- Bitrate: 4 113 Kbps
*** Video Track Parameters ***
- Format: H.264/MPEG-4 AVC
- Bitrate: Max.: Undefined / Average: 3 308 Kbps / Min.: Undefined
- Frame rate (fps): Max.: --- / Average: 25.000 / Min.: ---
- Encoding profile: High@L4.0
- Image size: 1920*816
- Pixel Aspect Ratio: Undefined
- Display Aspect Ratio: 2.35:1
- Interlacing: Progressive
*** First Audio Track Parameters ***
- Format: AAC - MPEG-4 audio
- Bitrate: 160 Kbps
- Resolution: Undefined
- Rate: 48.0 KHz
- Channel(s): 2 (stereo)
- Position: Front: L R
*** Miscellaneous ***
- Subtitle(s): No Subtitle
- Album: Undefined
- Performer: Undefined
- Genre: Undefined
- Encoded date: UTC 2012-08-06 15:05:15
- Album artist: Undefined