당분간 쓸만한 2메가 변환 옵션

I:\FFMPEG\bin>ffmpeg -i "f:\INPUT.asf" -b:v 2256k -b:a 1
28k -r 29.97 -ab 128k -crf 30 -profile:v baseline -re -cbr_quality 10 -maxrate:v
 2300k -copyts OUTPUT.mp4

Win32용 FFMPEG 컴파일된것... http://ffmpeg.zeranoe.com/builds/

최근에 새로 구매한 아이팟 터치용으로 동영상을 인코딩하려 하는데.....
Fodora core 12 에서 FFMpeg 아래와 같은 옵션으로 돌릴려고 하니...

ffmpeg -i "INPUT.avi" -acodec libfaac -ab 128k -s 480x320 -vcodec mpeg4 -b 0.5M -flags +aic+cbp+mv0+mv4 -trellis 1 -mbd 2 -cmp 2 -subcmp 2 -g 250 -maxrate 0.8M -bufsize 2M -metadata "title=제목" -f ipod "OUTPUT.mp4"
 
뭐 대략 faac 오류...
알고 봤더니 아래와 같이 faac 옵션이 빠져있었다.
(사연은 non-free가 되었다는....)

FFmpeg version SVN-r20372, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  built on Nov  7 2009 17:50:32 with gcc 4.4.2 20091027 (Red Hat 4.4.2-7)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib --mandir=/usr/share/man --arch=i686 --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables' --extra-version=rpmfusion --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avfilter-lavf --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib --cpu=i686 --enable-runtime-cpudetect
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.37. 1 / 52.37. 1
  libavformat   52.39. 2 / 52.39. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1. 4. 1 /  1. 4. 1
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0

[root@linuxserver i686]# rpmbuild --rebuild --with faac ffmpeg-0.5-5.20091026svn.fc12.src.rpm
RPM 리빌딩, 의존성 개발 RPM들 설치, RPM 재 설치

[root@linuxserver i686]# ffmpeg
FFmpeg version SVN-r20372, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  built on Dec  9 2009 13:30:26 with gcc 4.4.2 20091027 (Red Hat 4.4.2-7)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib --mandir=/usr/share/man --arch=i686 --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables' --extra-version=rpmfusion --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-nonfree --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avfilter-lavf --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib --cpu=i686 --enable-runtime-cpudetect
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.37. 1 / 52.37. 1
  libavformat   52.39. 2 / 52.39. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1. 4. 1 /  1. 4. 1
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0

IPOD 터치용 인코딩 성공!!~

다윈 퀵타임 스트리밍 서버를 현재 쓰고 있는 리눅스(Fedora 10)에 깔아 보려고 만만한 문서를 검색해 보았다. 아래와 같이 CentOS에 설치하는 문서를 발견.

RPM 시스템이니 약간의 경로만 바꾸니 바로 설치가 가능했다.

출저: http://www.howtoforge.com/apples-darwin-streaming-server-on-centos-5.2

Introduction

This tutorial will run you through the installation, configuration and preparation of media for Apple’s Darwin QuickTime Streaming Server on Centos/RHEL 5.2. Darwin QuickTime Streaming Server is capable of serving H.264 and mpeg4 file formats via the RTP/RTSP streaming protocols.

Prerequisites

1. CentOS 5.2 x86 installed
2. Development tools must be installed (can be installed after install with

   yum groupinstall "Development Tools"

   )

3. Static IP address and hostname; I used 192.168.0.10 and example.org as my hostname
4. Disable firewall and SELinux (configure later)

Installing Darwin Streaming Server 6.0.3

Currently there are no official binary packages of the current version so we will grab a source RPM. Apple’s current source package dose not compile on a Linux system without being patched. Enter the following command by command!

su -
wget http://www.abrahamsson.com/DarwinStreamingServer-6.0.3-2.src.rpm
rpm -i DarwinStreamingServer-6.0.3-2.src.rpm
cd /root/rpmbuild/SPECS/
rpmbuild -bb DarwinStreamingServer.spec
cd /root/rpmbuild/RPMS/i386/
yum –y install perl-Net-SSLeay
rpm -U DarwinStreamingServer*

When installing the RPMs the install hangs when trying to start Darwin so wait a few minutes then open another terminal session using Alt + F2 and run the following as root:

killall -9 DarwinStreamingServer

To change the administrator account from the default password of “password” use the following command:

qtpasswd administrator

So DSS starts at boot up run the following:

chkconfig --level 345 dss on

테스트용으로 H.264로 트랜스코딩을 부탁 받았다.

원본으로 구한 동영상은 640짜리 2개 파일(Golden.avi, flower.avi)이고 출력물은 품질 별로

총 12개!

#!/bin/sh

vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=320,scale=0.75,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_1.avi}}'
vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=320,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_2.avi}}'
vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=600,scale=0.75,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_3.avi}}'
vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=600,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_4.avi}}'
vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=1500,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_5.avi}}'
vlc -vvv "floswer.avi" --sout '#transcode{vcodec=h264,vb=1500,scale=1,acodec=mp4a,ab=128,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=F4_6.avi}}'

vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=320,scale=0.75,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_1.avi}}'
vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=320,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_2.avi}}'
vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=600,scale=0.75,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_3.avi}}'
vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=600,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_4.avi}}'
vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=1500,scale=1,acodec=mp4a,ab=64,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_5.avi}}'
vlc -vvv "Golden.avi" --sout '#transcode{vcodec=h264,vb=1500,scale=1,acodec=mp4a,ab=128,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst=GOLDEN_6.avi}}'

VLC 쉘… 괜찮은데? 이용해서 배치 트랜스코더를 만들어볼까?

Figure 1: Chronological progression of ITU and MPEG standard [10]

Figure 2: Standard Motion Compensated Video Coding

Figure 3: An illustration of inter-frame prediction in I, P and B Frames

Figure 4: Effectiveness of basic techniques. 1) No MC; 2) Adding Skip mode to form a CR coder. Case 3) Allow only zero-valued MVs. 4) Allow integer-pel MC. 5) Allow half-pel MC 6) Allowing 4-MV; 7) Allowing quarter-pel MC. Refer to [7] for additional details


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Figure 5: H.264 Block diagram and features [10]

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Table 1: Key compression features in standard codecs

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Table 2: Codecs typically used in standard applications and roadmap