Difference between revisions of "Render options"

Revision as of 03:50, 26 October 2007

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Types

Here are the file types that can be rendered

• bmp - Bitmap
• dv - digital video
• mpg - Motion Picture Expert Group file format for moving pictures
• gif - graphic interchange format
• imagemagick - image manipulation program
• jpeg - Joint Photographic Expert Group - still format suited to photographs
• libav - libavcodec is a free software/open source LGPL-licensed library of codecs for encoding and decoding video and audio data; it is written in the C programming language. It is part of the FFmpeg-project and many free/open source applications rely on it.
• null - Dummy file for rendering engine testing?
• null-tile - Dummy file for rendering engine testing?
• open-exr - Still image designed for handling Motion picture frames developed by ILM
• png - portable Network graphics - still images with lossless compression
• ppm - portable pixmap - still image using very basic format
• yuv420p - Still image format designed to preserve the images luminance

Results

Rendering to Video

Rendering to video directly from Synfig under Windows presents some challenges.

If you want to render to anything other than mpg with ffmpeg, you'll want to save a series of images that represent your animation, to a still format that ffmpeg can read. I recommend png. Whilst you can render to any size image, if you're going to show your video on Youtube*.mpg->, you may want to take that into account when you render.

If you set up your render like

Image size - width 320 Xres 72.0 Phys width 4.44 Height 240 Yres 72.0 Phys Height 3.33 (Image span 11.0127

Image area Top left X: -3.67 Y:4.2 Bottom right X: 3.67 y:-4.2)

You will get a series of png files in your output directory. Open a command prompt, cd to that directory, then use ffmpeg to assemble these png files into the video stream of your choice. for example -

C:\output>ffmpeg -r 15 -i rfrac%04d.png -f flv fractal.flv

creates a Flash video file of with the same framerate as used on Youtube. You should be able to submit it to Youtube without the need for the Youtube servers to have to re-compress it.

Notes

note 1 - libav crashes for genete

The extension is recognized but it crashed. Please report if it renders in your machine (Using Ubuntu 6.10 and svn 945). The console output is this: synfig(5882): info: render target filename: '/home/carlos/Videos/pruebasynfig/RenderTest/avi-auto/RenderTest.avi'; extension: 'avi'

synfig(5882): info: 'avi' is a known extension - using target 'libav' Output #0, avi, to '/home/carlos/Videos/pruebasynfig/RenderTest/avi-auto/RenderTest.avi':
  Stream #0.0: Video: mpeg4 (hq), yuv420p, 480x270, q=2-31, 925 kb/s, 24.00 fps(c)
Fallo de segmentación (core dumped)

note 2 - wtf is yuv?

The yuv file is rendered but it seems to have a not compatible format. See the console output when try to convert to a avi using ffmepg.

ffmpeg -i RenderTest.yuv -sameq RenderTest.avi FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard

 configuration:  --enable-gpl --enable-pp --enable-pthreads --enable-vorbis --enable-libogg --enable-a52 --enable-dts --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr 
 libavutil version: 0d.49.0.0
 libavcodec version: 0d.51.11.0
 libavformat version: 0d.50.5.0
 built on Sep 20 2006 00:26:15, gcc: 4.1.2 20060906 (prerelease) (Ubuntu 4.1.1-13ubuntu2)
picture size invalid (0x0)
[rawvideo @ 0xb7f47c30]Could not find codec parameters (Video: rawvideo, yuv420p)
RenderTest.yuv: could not find codec parameters

I can watch a .yuv animation. You need to specify the size it was rendered at - that doesn't seem to be part of the file format:

 animate -size 480x270 file.yuv

I can single-step through a .yuv animation, using SPACE to step forward and BACKSPACE to step back through the frames:

 display -size 480x270 file.yuv

I can also convert a .yuv to a series of .png files. This makes file-0.png through file-23.png for a 24 frame animation:

 convert -size 480x270 file.yuv file.png

I also discovered that ffmpeg will happily convert a .yuv to .avi if you just tell it the image dimensions:

 ffmpeg -s 480x270 -i file.yuv file.avi

svn r980 adds headers to created .yuv files, so you no longer need to specify the size when using them. -- dooglus 21:50, 25 October 2007 (EDT)

note 3 - mng not working?

The extension is recognized but it shows this pop-up window message: Unable to create target for /home/carlos/Videos/pruebasynfig/RenderTest/mng-auto/RenderTest.mng. Please report if it renders in your machine (Using Ubuntu 6.10 and svn 945)

How did you get the mng extension to be recognised? The module isn't built by default. Did you uncomment it in configure.ac? -- dooglus 10:49, 25 October 2007 (EDT)

In fact it is not recognized. You'll have same answer if you put any other unknown extension. This target mng doesn't should be here. I was in a dream :).--Genete 16:24, 25 October 2007 (EDT)

I fixed mng rendering in svn r973-979. You can test it now. -- dooglus 18:14, 25 October 2007 (EDT)

note 4 - bug in 'auto' (fixed in svn)

Bug - Synfig was only checking the extension the first time Auto was selected -- fixed in r941.

note 5 - bug in .bmp (fixed in svn)

Please retest with r965 or newer to see if the inverted text bug is fixed.

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