mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-15 03:34:56 +00:00
149 lines
4.1 KiB
HTML
149 lines
4.1 KiB
HTML
<HTML>
|
|
<HEAD>
|
|
<!-- Created by texi2html 1.56k from faq.texi on 28 December 2002 -->
|
|
|
|
<TITLE>FFmpeg FAQ</TITLE>
|
|
</HEAD>
|
|
<BODY>
|
|
<H1>FFmpeg FAQ</H1>
|
|
<P>
|
|
<P><HR><P>
|
|
<H1>Table of Contents</H1>
|
|
<UL>
|
|
<LI><A NAME="TOC1" HREF="faq.html#SEC1">1. General Problems</A>
|
|
<UL>
|
|
<LI><A NAME="TOC2" HREF="faq.html#SEC2">1.1 ffserver doesn't not work.</A>
|
|
<LI><A NAME="TOC3" HREF="faq.html#SEC3">1.2 I cannot read this file although this format seems to be suppored by ffmpeg.</A>
|
|
<LI><A NAME="TOC4" HREF="faq.html#SEC4">1.3 I get audio/video synchro problems when grabbing.</A>
|
|
<LI><A NAME="TOC5" HREF="faq.html#SEC5">1.4 How do I encode jpegs to another format ?</A>
|
|
<LI><A NAME="TOC6" HREF="faq.html#SEC6">1.5 FFmpeg does not support codec XXX. Can you include a Windows DLL loader to support it ?</A>
|
|
<LI><A NAME="TOC7" HREF="faq.html#SEC7">1.6 How can I read from the standard input or write to the standard output ?</A>
|
|
</UL>
|
|
<LI><A NAME="TOC8" HREF="faq.html#SEC8">2. Development</A>
|
|
<UL>
|
|
<LI><A NAME="TOC9" HREF="faq.html#SEC9">2.1 Can you support my C compiler XXX ?</A>
|
|
<LI><A NAME="TOC10" HREF="faq.html#SEC10">2.2 I want to use ffmpeg or libavcodec under Windows. Can you support my proprietary C compiler XXX ?</A>
|
|
<LI><A NAME="TOC11" HREF="faq.html#SEC11">2.3 Can you add automake, libtool or autoconf support ?</A>
|
|
</UL>
|
|
</UL>
|
|
<P><HR><P>
|
|
|
|
<P>
|
|
FFmpeg FAQ
|
|
|
|
|
|
|
|
|
|
<H1><A NAME="SEC1" HREF="faq.html#TOC1">1. General Problems</A></H1>
|
|
|
|
|
|
|
|
<H2><A NAME="SEC2" HREF="faq.html#TOC2">1.1 ffserver doesn't not work.</A></H2>
|
|
|
|
<P>
|
|
ffmpeg development is now concentrated on the codec and format
|
|
handling. New developments broke ffserver, so don't expect it to work
|
|
correctly. It is planned to fix it ASAP.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC3" HREF="faq.html#TOC3">1.2 I cannot read this file although this format seems to be suppored by ffmpeg.</A></H2>
|
|
|
|
<P>
|
|
Even if ffmpeg can read the file format, it may not support all its
|
|
codecs. Please consult the supported codec list in the ffmpeg
|
|
documentation.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC4" HREF="faq.html#TOC4">1.3 I get audio/video synchro problems when grabbing.</A></H2>
|
|
|
|
<P>
|
|
Currently, the grabbing stuff does not handle synchronisation
|
|
correctly. You are free to correct it. It is planned to fix it ASAP.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC5" HREF="faq.html#TOC5">1.4 How do I encode jpegs to another format ?</A></H2>
|
|
|
|
<P>
|
|
If the jpegs are named img1.jpg, img2.jpg, img3.jpg,..., use:
|
|
|
|
|
|
|
|
<PRE>
|
|
ffmpeg -i img%d.jpg /tmp/a.mpg
|
|
</PRE>
|
|
|
|
<P>
|
|
<SAMP>`%d'</SAMP> is replaced by the image number.
|
|
|
|
|
|
<P>
|
|
<TT>`img%03d.jpg'</TT> generates <TT>`img001.jpg'</TT>, <TT>`img002.jpg'</TT>, etc...
|
|
|
|
|
|
<P>
|
|
The same system is used for the other image formats.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC6" HREF="faq.html#TOC6">1.5 FFmpeg does not support codec XXX. Can you include a Windows DLL loader to support it ?</A></H2>
|
|
|
|
<P>
|
|
No. FFmpeg only supports open source codecs. Windows DLLs are not
|
|
portable, bloated and often slow.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC7" HREF="faq.html#TOC7">1.6 How can I read from the standard input or write to the standard output ?</A></H2>
|
|
|
|
<P>
|
|
Use <TT>`-'</TT> as filename.
|
|
|
|
|
|
|
|
|
|
<H1><A NAME="SEC8" HREF="faq.html#TOC8">2. Development</A></H1>
|
|
|
|
|
|
|
|
<H2><A NAME="SEC9" HREF="faq.html#TOC9">2.1 Can you support my C compiler XXX ?</A></H2>
|
|
|
|
<P>
|
|
No. Only GCC is supported. GCC is ported on most systems available and I
|
|
don't see the need to pollute the source code with <CODE>#ifdef</CODE>s
|
|
related to the compiler.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC10" HREF="faq.html#TOC10">2.2 I want to use ffmpeg or libavcodec under Windows. Can you support my proprietary C compiler XXX ?</A></H2>
|
|
|
|
<P>
|
|
No. Use <CODE>mingw-gcc</CODE> available at <A HREF="http://www.mingw.org/">http://www.mingw.org/</A> to
|
|
compile the code. It generates object files fully compatible with other
|
|
windows compilers.
|
|
|
|
|
|
|
|
|
|
<H2><A NAME="SEC11" HREF="faq.html#TOC11">2.3 Can you add automake, libtool or autoconf support ?</A></H2>
|
|
|
|
<P>
|
|
No. These tools are too blowted and they complicate the build. Moreover,
|
|
since only <SAMP>`gcc'</SAMP> is supported they would add little advantages in
|
|
terms of portability.
|
|
|
|
|
|
<P><HR><P>
|
|
This document was generated on 28 December 2002 using
|
|
<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A> 1.56k.
|
|
</BODY>
|
|
</HTML>
|