2011-04-25, 01:44
So,
I must be going mad.
I recorded an MPEG-4 Transport Stream file directly from my satellite box using an R5000-HD modification.
It looks beautiful.
It's 8.9 GB, and MediaInfo reports the following:
I then used a program called "TSSniper" to chop off the beginning and end of the program, from where it started early and ended late.
It took no more than a few minutes to complete.
The resulting file appears to be all there, and it looks and sounds great, but is only 1.5 GiB !! This program does NOT transcode, as far as I know...
MediaInfo reports:
Did I miss something? How can the video bitrate have dropped from 18Mbps to ~3Mbps when I didn't transcode the thing? And it's only 1/6th the size...
Please enlighten me!
-Wes
I must be going mad.
I recorded an MPEG-4 Transport Stream file directly from my satellite box using an R5000-HD modification.
It looks beautiful.
It's 8.9 GB, and MediaInfo reports the following:
Code:
General
ID : 5000 (0x1388)
Complete name : M:\TVRecordings\Game of Thrones - s01e01 - Winter is Coming.ts
Format : MPEG-TS
File size : 8.90 GiB
Duration : 1h 5mn
Overall bit rate : 19.4 Mbps
Video
ID : 17 (0x11)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Format settings, GOP : M=1, N=64
Codec ID : 27
Duration : 1h 5mn
Bit rate : 18.0 Mbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.387
Stream size : 8.28 GiB (93%)
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177
Audio
ID : 20 (0x14)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 1h 5mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -816ms
Stream size : 180 MiB (2%)I then used a program called "TSSniper" to chop off the beginning and end of the program, from where it started early and ended late.
It took no more than a few minutes to complete.
The resulting file appears to be all there, and it looks and sounds great, but is only 1.5 GiB !! This program does NOT transcode, as far as I know...
MediaInfo reports:
Code:
General
ID : 16 (0x10)
Complete name : M:\TV\GameOfThrones\Season 01\Game of Thrones - s01e01 - Winter is Coming.ts
Format : MPEG-TS
File size : 1.56 GiB
Duration : 1h 1mn
Overall bit rate : 3 645 Kbps
Video
ID : 17 (0x11)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Format settings, GOP : M=1, N=64
Codec ID : 27
Duration : 1h 1mn
Bit rate : 3 077 Kbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.066
Stream size : 1.32 GiB (84%)
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177
Audio
ID : 20 (0x14)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 6
Duration : 1h 1mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 157ms
Stream size : 168 MiB (11%)Did I miss something? How can the video bitrate have dropped from 18Mbps to ~3Mbps when I didn't transcode the thing? And it's only 1/6th the size...
Please enlighten me!
-Wes
