[theora] libThusnelda 20081201
Mysoogal
contact at mysoogal.com
Mon Aug 10 17:27:26 PDT 2009
I'm having a issue with build libThusnelda 20081201,video is blocky, you
can clearly see video is blocky in some parts of the video.
the Bit rate is high so what is the problem is, on x264 this type of Bit
rate will make the video very smooth. can anybody tell me how to get
that smooth video and what settings can i use,
I'm interested in the advanced usage of Thusnelda with two pass
encoding. on the documentation page of Thusnelda is very limited and not
much information
i had to go search on google to find some answers, looking inside the
Thusnelda encoder from the cmd gives information but that i believe is
limited and needs
to be explained properly
here is a frame from the encoded video tralier, as you can see it is
very blocky, what i'm wondering is why it is like this when bit rate is
high ? i have read
through this
http://people.xiph.org/~greg/video/ytcompare/comparison.html few times
but could not understand what command line is being used. please can
somebody update the following
http://v2v.cc/~j/ffmpeg2theora/examples.html that is in line with new
things added into Thusnelda.
http://i26.tinypic.com/25jjo5v.png
+--------------------------------------------------------------------------------------------------------------------+
two pass encoding i find on google
ffmpeg2theora --first-pass -V 810 -A 64 -c 2 -H 22050
shutterisland-tlr1_h480p.mov
ffmpeg2theora --second-pass -V 810 -A 64 -c 2 -H 22050
shutterisland-tlr1_h480p.mov
+---------------------------------------------------------------------------------------------------------------------+
my Encoded output information
+----------------------------------------------------------------------------------------------------------------------+
General
ID : 20952 (0x51D8)
Complete name : C:\Documents and
Settings\Mysoogal\Desktop\bT\shutterisland-tlr1_h480p.ogv
Format : OGG
File size : 15.3 MiB
Duration : 2mn 30s
Overall bit rate : 855 Kbps
Writing application : ffmpeg2theora-0.24
Video
ID : 24563 (0x5FF3)
Format : Theora
Duration : 2mn 30s
Bit rate : 749 Kbps
Nominal bit rate : 810 Kbps
Width : 848 pixels
Height : 352 pixels
Display aspect ratio : 2.409
Frame rate : 23.976 fps
Bits/(Pixel*Frame) : 0.105
Writing library : Xiph.Org libThusnelda 20081201 (UTC
2008-12-01)
Audio
ID : 26334 (0x66DE)
Format : Vorbis
Format settings, Floor : 1
Duration : 2mn 30s
Bit rate : 64.0 Kbps
Channel(s) : 2 channels
Sampling rate : 22.05 KHz
Stream size : 1.15 MiB (7%)
Writing library : libVorbis 20081127 (UTC 2008-11-27)
+----------------------------------------------------------------------------------------------------------------------+
my test video clip 480p
+----------------------------------------------------------------------------------------------------------------------+
General
Complete name : C:\Documents and
Settings\Mysoogal\Desktop\bT\shutterisland-tlr1_h480p.mov
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt
File size : 42.8 MiB
Duration : 2mn 30s
Overall bit rate : 2 390 Kbps
Movie name : Shutter Island
Movie name/More : In theaters 2009
Encoded date : UTC 2009-06-08 15:42:49
Tagged date : UTC 2009-06-08 15:42:52
Writing library : Apple QuickTime
Original source medium : 001
Copyright : © 2009 Paramount Pictures. All Rights
Reserved
Comment : Encoded and delivered by
apple.com/trailers/
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main at L3.0
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2mn 30s
Bit rate mode : Variable
Bit rate : 2 283 Kbps
Width : 848 pixels
Height : 352 pixels
Display aspect ratio : 2.409
Frame rate mode : Constant
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.319
Stream size : 40.9 MiB (96%)
Encoded date : UTC 2009-06-05 23:42:06
Tagged date : UTC 2009-06-08 15:42:52
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 2mn 30s
Bit rate mode : Constant
Bit rate : 102 Kbps
Nominal bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48.0 KHz
Resolution : 16 bits
Stream size : 1.83 MiB (4%)
Encoded date : UTC 2009-06-05 23:42:06
Tagged date : UTC 2009-06-08 15:42:52
Menu
ID : 3
Format : TimeCode
Encoded_Date : UTC 2009-06-05 23:42:06
Tagged_Date : UTC 2009-06-08 15:42:52
+-----------------------------------------------------------------------------------------------------------------+
thanks for reading, i'm looking forward to hearing from anybody here
mysoogal
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