2010年11月17日星期三

Video/Audio Encoding Cheat Sheet


This is a small personal cheat sheet for encoding audio/video encoding where I put some of my most used stuff with FFmpeg and other tools.
I use H.264 and AAC on MP4, M4V or MKV container most of the time.
If you have any question just contact me.



Video Size and Aspect Ratios

iPhone:

Name Size Aspect
Wide 16:9 480x270 4:3
Old TV 4:3 427x320 16:9
Wide 16:9 /16 480x272 480:272
Old TV 4:3 /16 432x320 432:320

DV NTSC Video

Name Size Aspect
Wide 16:9 720x480 16:9
Old TV 4:3 720x480 4:3

Youtube and Vimeo Upload

Name Size Aspect
SD 4:3 640:480 4:3
HD 16:9 1280x720 16:9

HD, Blu-Ray, AVCHD

Name Size Aspect
720p 1280x720 16:9
1080p/i Anamorphic 1440x1080 16:9
1080p/i 1920x1080 16:9

Frame Rates

Name Standard Fps FFmpeg
Movies NTSC 23.976 24000/1001
Movies QuickTime N/A 29.976 10000000/417083
TV Video NTSC 29.97 30000/1001
Movies PAL 25 25
TV Video PAL 30 30

FFmpeg Encoding

X264 Presets

default fastfirstpass lossless_ultrafast lossless_slower
baseline slowfirstpass lossless_fast lossless_max
normal hq lossless_medium ipod320
main max lossless_slow ipod640

High quality 2 Pass

ffmpeg -y -i INPUT -r 30000/1001 -b 2M -bt 4M -vcodec libx264 -pass 1 -vpre fastfirstpass -an output.mp4

ffmpeg -y -i INPUT -r 30000/1001 -b 2M -bt 4M -vcodec libx264 -pass 2 -vpre hq -acodec libfaac -ac 2 -ar 48000 -ab 192k output.mp4

iPod-iPhone 320 width

ffmpeg -i INPUT -s 320x240 -r 30000/1001 -b 200k -bt 240k -vcodec libx264 -vpre ipod320 -acodec libfaac -ac 2 -ar 48000 -ab 192k output.mp4

iPod-iPhone 640 width

ffmpeg -i INPUT -s 640x480 -r 30000/1001 -b 200k -bt 240k -vcodec libx264 -vpre ipod640 -acodec libfaac -ac 2 -ar 48000 -ab 192k output.mp4

Hight quality, 2 pass without presset

ffmpeg -y -i input -r 24000/1001 -b 6144k -bt 8192k -vcodec libx264 -pass 1 -flags +loop -me_method dia -g 250 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -bf 16 -b_strategy 1 -i_qfactor 0.71 -cmp +chroma -subq 1 -me_range 16 -coder 1 -sc_threshold 40 -flags2 -bpyramid-wpred-mixed_refs-dct8x8+fastpskip -keyint_min 25 -refs 1 -trellis 0 -directpred 1 -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8-an output.mp4
ffmpeg -y -i input -r 24000/1001 -b 6144k -bt 8192k -vcodec libx264 -pass 2 -flags +loop -me_method umh -g 250 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -bf 16 -b_strategy 1 -i_qfactor 0.71 -cmp +chroma -subq 8 -me_range 16 -coder 1 -sc_threshold 40 -flags2 +bpyramid+wpred+mixed_refs+dct8x8+fastpskip -keyint_min 25 -refs 4 -trellis 1 -directpred 3 -partitions +parti8x8+parti4x4+partp8x8+partb8x8-acodec libfaac -ac 2 -ar 44100 -ab 128k output.mp4

iPod-iPhone 320 width, without presset

ffmpeg -i INPUT -s 320x240 -r 30000/1001 -b 200k -bt 240k -vcodec libx264 -coder 0 -bf 0 -flags2 -wpred-dct8x8 -level 13 -maxrate 768k -bufsize 3M-acodec libfaac -ac 2 -ar 48000 -ab 192k output.mp4

iPod-iPhone 640 width, without presset

ffmpeg -i INPUT -s 320x240 -r 30000/1001 -b 200k -bt 240k -vcodec libx264 coder 0 -bf 0 -refs 1 -flags2 -wpred-dct8x8 -level 30 -maxrate 10M -bufsize 10M-acodec libfaac -ac 2 -ar 48000 -ab 192k output.mp4

iPod-iPhone, 2 pass custom

ffmpeg -y -i input -r 30000/1001 -s 480x272 -aspect 480:272 -vcodec libx264 -b 512k -bt 1024k -maxrate 4M -flags +loop -cmp +chroma -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq "blurCplx^(1-qComp)" -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -coder 0 -refs 1 -bufsize 4M -level 21 -partitions parti4x4+partp8x8+partb8x8 -subq 5 -f mp4 -pass 1 -an -title "Title" output.mp4
ffmpeg -y -i input -r 30000/1001 -s 480x272 -aspect 480:272 -vcodec libx264 -b 512k -bt 1024k -maxrate 4M -flags +loop -cmp +chroma -me_range 16 -g 300 keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq "blurCplx^(1-qComp)" -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -coder 0 -refs 1 -bufsize 4M -level 21 -partitions parti4x4+partp8x8+partb8x8 -subq 5 -f mp4 -pass 2 -acodec libfaac -ac 2 -ar 44100 -ab 128k -title "Title" output.mp4

DV Video

To DV

ffmpeg -i input -target ntsc-dv -aspect 4:3 -y output.dv

From DV To Microsoft AVI DV

ffmpeg -i input.dv -vcodec copy -vtag dvsd -acodec pcm_s16le -f avi -aspect 4:3 -y output.avi

Audio

AAC Stereo HQ

-acodec libfaac -ac 2 -ar 48000 -ab 192k

AAC Stereo SQ

-acodec libfaac -ac 2 -ar 44100 -ab 128k

AAC 5.1 HQ

-acodec libfaac -ac 6 -ar 48000 -ab 448k

AAC 5.1 LQ

-acodec libfaac -ac 6 -ar 44100 -ab 224k

AAC to AC3 (Recomended use AviSynth for channel mapping)

ffmpeg -i intput.aac -vn -acodec ac3 -ac 6 -ar 48000 -ab 448k

AC3 to M4V (Mux to be opened and edited in other appz)

ffmpeg -i input.ac3 -vn -acodec copy output.m4v

AC3 to AAC (not working as expected)

ffmpeg -i input.ac3 -vn -r 30000/1001 -acodec libfaac -ac 6 -ar 48000 -ab 448k output.aac

Eac3To

AC3 5.1 Channel Mapping Fix

eac3to true_hd.ac3 fixed_true_hd.ac3 -blu-ray -448

AAC to AC3

  1. Open AAC on Audacity or SoundBooth
  2. Export to Wav
  3. Remux from Wav to Wav with FFmpeg:
    ffmpeg -i audio.wav â€"vn -acodec copy audio-out.wav
  4. Convert to AC3 with EAC3to
    eac3to.exe audio.wav Main.ac3 -448

Other FFmpeg Options

-threads thread count
-y overwrite output files
-ss time_off set the start time offset
-t duration record or transcode "duration" seconds of audio/video
-ildct Interlaced

FFmpeg Sources

IRC

Server: irc.freenode.net

Channel: #ffmpeg

Download

The bests binaries on the web, Easy installation without compiling, just runing an install file:

FFmpeg for Windows

FFmpeg for Macintosh OS X (Intel)

FFmpeg for Linux
You can also use this extremely easy guide to install FFmpeg on your Windows, GNU Linux or Macintosh machine:

http://www.rodrigopolo.com/about/wp-stream-video/ffmpeg-binary-installers-for-win-mac-and-linux

Win32 Binary Builds

http://ffmpeg.arrozcru.com/autobuilds

http://sourceforge.net/project/showfiles.php?group_id=205275&package_id=248632

FFmpeg x264 encoding guide by Robert Swain

http://rob.opendot.cl/index.php/useful-stuff/ffmpeg-x264-encoding-guide


H.264 Profiles and Levels

8x8dct high
cabac+bframes main
-level #

Special Thanks To:



FFmpeg Cheat Sheet by Rodrigo Polo is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.

Based on a work at www.rodrigopolo.com.

http://rodrigopolo.com/ffmpeg/cheats.html

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