{"id":93,"date":"2011-06-25T23:03:05","date_gmt":"2011-06-25T14:03:05","guid":{"rendered":"http:\/\/blogs.motokado.com\/yoshi\/?p=93"},"modified":"2024-12-06T12:44:50","modified_gmt":"2024-12-06T03:44:50","slug":"comparison-of-x264-presets","status":"publish","type":"post","link":"https:\/\/blogs.motokado.com\/yoshi\/2011\/06\/25\/comparison-of-x264-presets\/","title":{"rendered":"Comparison of ffmpeg’s x264 presets"},"content":{"rendered":"

Measured performance of ffmpeg’s x264 quality presets, to know which option is the best for my purpose converting mpeg2 ts to Apple TV mp4. Factors need to be considered are 1) conversion speed, 2) file size and 3) quality of the video. The most important factor is conversion speed, which would be nice\u00a0if the time for conversion is shorter than for recording. For file size off course, the smaller the better as the space of my Apple TV storage is limited.<\/p>\n

Test Method<\/h4>\n

The test was done with ffmpeg version 0.6.1 on 2.8GHz Intel Core i7 running Mac OS X 10.6.8 as;<\/p>\n

\nfor i in ultrafast superfast veryfast faster fast medium slow slower veryslow placebo\ndo ffmpeg -i sample.ts -threads 4 -vcodec libx264 \\\n      -vpre $i -vpre main -crf 18 -s 1280x720 \\\n      -acodec libfaac -ab 160k \\\n      -y $i.mp4\ndone\n<\/pre>\n
sample.ts is a 60 seconds of full HD (1440×1080) mpeg2 video.<\/p>\n
Test Results<\/h4>\n
\n\n\n\t\n\t\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t
Preset used on conversion<\/th>Conversion speed (fps - frames per second) <\/th>Size of the output video file (in bytes)<\/th>\n\t<\/tr>\n<\/thead>\n
ultrafast<\/td>29.6<\/td>81,046,858<\/td>\n\t<\/tr>\n\t
superfast<\/td>27.9<\/td>58,180,478<\/td>\n\t<\/tr>\n\t
veryfast<\/td>20.6<\/td>43,968,615<\/td>\n\t<\/tr>\n\t
faster<\/td>13.0<\/td>32,981,783<\/td>\n\t<\/tr>\n\t
fast<\/td>9.1<\/td>35,461,071<\/td>\n\t<\/tr>\n\t
medium<\/td>8.0<\/td>35,119,322<\/td>\n\t<\/tr>\n\t
slow<\/td>5.6<\/td>33,367,247<\/td>\n\t<\/tr>\n\t
slower<\/td>2.1<\/td>33,698,347<\/td>\n\t<\/tr>\n\t
veryslow<\/td>1.3<\/td>29,697,663<\/td>\n\t<\/tr>\n\t
placebo<\/td>0.6<\/td>29,395,288<\/td>\n\t<\/tr>\n<\/tbody>\n<\/table>\n<\/center><\/p>\n
\"\"
On my environment, ultrafast<\/code> can convert ts video almost at the recording speed (29.97 fps). But my decision was to go with superfast<\/code> as its fps is closer to ultrafast<\/code> yet the size is much smaller.<\/p>\n","protected":false},"excerpt":{"rendered":"
Measured performance of ffmpeg’s x264 quality presets, to know which option is the best for my purpose converting mpeg2 ts to Apple TV mp4. Factors need to be considered are 1) conversion speed, 2) file size and 3) quality of the video. The most important factor is conversion speed, which would be nice\u00a0if the time […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[5],"class_list":["post-93","post","type-post","status-publish","format-standard","hentry","category-unix","tag-ffmpeg"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t