mirror of https://github.com/odrling/Aegisub
203 lines
8.1 KiB
HTML
203 lines
8.1 KiB
HTML
<html>
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<title>
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FFmpegSource Documentation
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</title>
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</head>
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<body>
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<h1>FFmpegSource Documentation</h1>
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<h2>Changes</h2>
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<ul>
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<li>1.7<ul>
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<li>Updated FFmpeg</li>
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<li>Fixed error with mkv for codecs without codec private data and the first packet doesn't belong to them</li>
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</ul></li>
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<li>1.6<ul>
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<li>Fixed ac3 and other formats stored in mkv</li>
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<li>Skip unnecessary seeking when index information already exists (gif file opening only 3/4 broken now)</li>
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<li>Throws an error when the selected audio/video track has no frames/samples</li>
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</ul></li>
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<li>1.5<ul>
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<li>Fixed a bug that made avformat opened files only return audio if only the audio cache needed to be created</li>
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<li>Rejects more corrupt cache files</li>
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<li>Fixed crash when a 0 byte audio cache file is present</li>
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<li>Improved framerate guessing for avformat which now takes takes the duration of the first frame into account</li>
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<li>Fixed a bug introduced in 1.4 that would make the number of reported frames too high for files opened with avformat</li>
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<li>Fixed mpeg2 and probably some other formats stored in mkv</li>
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<li>Fixed issues with large mkv files and large audio cache files</li>
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<li>FFmpeg is now compiled with liba52 and faad2</li>
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</ul></li>
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<li>1.4<ul>
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<li>Uses the average framerate for mkv files</li>
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<li>Naming scheme of cache files changed to prevent confusion with the default names in files with multiple tracks of the same type</li>
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<li>Use mmx optimizations in swscaler when possible</li>
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<li>Now uses normal windows linebreaks in all files</li>
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<li>Removed FFAudioSource</li>
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<li>Merged FFVideoSource and FFAudioRefSource into FFmpegSource</li>
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<li>Added postprocessing with libpostproc in FFmpegSource and separately in FFPP</li>
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</ul></li>
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<li>1.3<ul>
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<li>Compiled against ffmpeg rev9620</li>
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<li>Added FFAudioRefSource</li>
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<li>Added FFAudioSource (has big issues)</li>
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<li>Renamed FFmpegSource to FFVideoSource</li>
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<li>Adjusted seeking in the forward direction to only be done if the requested frame is more than 10 frames away to reduce unnecessary seeking</li>
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<li>Now outputs the last frame properly when there are decoding delays</li>
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</ul></li>
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<li>1.2<ul>
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<li>Compiled against ffmpeg rev9451</li>
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<li>Somewhat cleaner source code</li>
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<li>Linear access in addition to a few other modes of seeking can now be forced</li>
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<li>Can now save the index information to a file which makes subsequent file opening fast</li>
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<li>No longer skips indexing for any format</li>
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</ul></li>
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<li>1.1<ul>
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<li>Skip indexing for avi</li>
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<li>Prefix all error messages with the plugin name</li>
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<li>Can write v2 timecodes to a file</li>
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<li>Fixed reported framerate</li>
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</ul></li>
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</ul>
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<h2>Compatibility - Video</h2>
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<ul>
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<li>AVI, MKV, MP4, FLV: Frame accurate</li>
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<li>WMV: Frame accurate(?) but avformat seems to pick keyframes relatively far away</li>
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<li>OGM: Messed up first frame and seeking produces smearing with seekmode=3, incredibly slow seeking without, remux to mkv or avi</li>
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<li>VOB: No rff flags applied, frame accurate?</li>
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<li>MPG: Seeking seems to be off by one or two frames now and then</li>
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<li>TS: don't bother</li>
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</ul>
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<h2>Compatibility - Audio</h2>
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<ul>
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<li>Sample accurate in all containers</li>
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</ul>
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<h2>Usage</h2>
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<p>
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<b>FFmpegSource(string source, int vtrack = -1, int atrack = -2, string timecodes, bool vcache = true, string vcachefile, string acachefile, string pp, int ppquality = 6, int seekmode = 1)</b><br />
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</p>
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<p>
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Note that the audio cache will always be created when opening files with audio and that it will be huge since it stores all audio as raw signed 16 bit pcm.
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</p>
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<p>
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<b>FFPP(clip, string pp, int ppquality = 6)</b><br />
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Separate postprocessing which also seems to include a few simple deinterlacers
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</p>
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<p>
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<b>source:</b>
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Source file.
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</p>
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<p>
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<b>atrack & vtrack:</b>
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Track number as seen by the relevant demuxer, starts from 0, -1 means it will pick the first suitable track and -2 means it's disabled.
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</p>
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<p>
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<b>timecodes:</b>
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File to output timecodes to, if the file exists it will be overwritten.
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</p>
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<p>
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<b>vcache:</b>
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Write video indexing information to a file for later use.
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</p>
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<p>
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<b>vcachefile & acachefile:</b>
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Specifies the file to store the index information or raw audio in, if nothing is specified (source).ffv(tracknumber)cache is used for video and (source).ffa(tracknumber)cache for audio.
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</p>
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<p>
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<b>pp:</b>
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See the table below for a full description, an empty string means no processing. It is recommended to avoid the autoq option since it's currently unknown what effect it will have on the processing.
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</p>
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<p>
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<b>ppquality:</b>
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The quality to use for the specified postprocessing. Valid values are 0-6 where 0 usually means that no actual processing is done.
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</p>
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<p>
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<b>seekmode:</b>
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Force how seeking is handled, has no effect on matroska files which always use the equivalent of seekmode=1<br />
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<b>0:</b> linear access, the definition of slow but should make some formats "usable"<br />
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<b>1:</b> safe normal, bases seeking decisions on the reported keyframe positions<br />
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<b>2:</b> unsafe normal, same as 1 but no error will be thrown if the exact destination has to be guessed<br />
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<b>3:</b> aggressive, seek in the forward direction even if no closer keyframe is known to exist, only useful for testing and containers where avformat doesn't report keyframes properly
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</p>
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<h2>PP string format</h2>
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<pre>
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Available postprocessing filters:
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Filters Options
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short long name short long option Description
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* * a autoq CPU power dependent enabler
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c chrom chrominance filtering enabled
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y nochrom chrominance filtering disabled
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n noluma luma filtering disabled
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hb hdeblock (2 threshold) horizontal deblocking filter
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1. difference factor: default=32, higher -> more deblocking
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2. flatness threshold: default=39, lower -> more deblocking
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the h & v deblocking filters share these
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so you can't set different thresholds for h / v
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vb vdeblock (2 threshold) vertical deblocking filter
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ha hadeblock (2 threshold) horizontal deblocking filter
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va vadeblock (2 threshold) vertical deblocking filter
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h1 x1hdeblock experimental h deblock filter 1
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v1 x1vdeblock experimental v deblock filter 1
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dr dering deringing filter
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al autolevels automatic brightness / contrast
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f fullyrange stretch luminance to (0..255)
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lb linblenddeint linear blend deinterlacer
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li linipoldeint linear interpolating deinterlace
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ci cubicipoldeint cubic interpolating deinterlacer
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md mediandeint median deinterlacer
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fd ffmpegdeint ffmpeg deinterlacer
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l5 lowpass5 FIR lowpass deinterlacer
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de default hb:a,vb:a,dr:a
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fa fast h1:a,v1:a,dr:a
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ac ha:a:128:7,va:a,dr:a
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tn tmpnoise (3 threshold) temporal noise reducer
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1. <= 2. <= 3. larger -> stronger filtering
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fq forceQuant <quantizer> force quantizer
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Usage:
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<filterName>[:<option>[:<option>...]][[,|/][-]<filterName>[:<option>...]]...
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long form example:
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vdeblock:autoq/hdeblock:autoq/linblenddeint default,-vdeblock
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short form example:
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vb:a/hb:a/lb de,-vb
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more examples:
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tn:64:128:256
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</pre>
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<h2>Compiling</h2>
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<p><b>zlib</b> from http://www.zlib.net/</p>
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<p><b>FFmpeg svn</b> from http://ffmpeg.mplayerhq.hu/</p>
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<p><b>Required Configuration:</b>
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./configure --enable-shared --disable-static --enable-memalign-hack --enable-gpl --enable-swscaler</p>
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<p><b>Suggested Additional Options:</b>
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--disable-encoders --disable-muxers --enable-small</p>
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</body>
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</html> |