mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 06:50:44 +00:00
86 lines
2.6 KiB
Plaintext
86 lines
2.6 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
|
|
|
|
@settitle FFmpeg FAQ
|
|
@titlepage
|
|
@sp 7
|
|
@center @titlefont{FFmpeg FAQ}
|
|
@sp 3
|
|
@end titlepage
|
|
|
|
|
|
@chapter General Problems
|
|
|
|
@section ffserver doesn't not work.
|
|
|
|
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.
|
|
|
|
@section I cannot read this file although this format seems to be suppored by ffmpeg.
|
|
|
|
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.
|
|
|
|
@section I get audio/video synchro problems when grabbing.
|
|
|
|
Currently, the grabbing stuff does not handle synchronisation
|
|
correctly. You are free to correct it. It is planned to fix it ASAP.
|
|
|
|
@section How do I encode jpegs to another format ?
|
|
|
|
If the jpegs are named img1.jpg, img2.jpg, img3.jpg,..., use:
|
|
|
|
@example
|
|
ffmpeg -i img%d.jpg /tmp/a.mpg
|
|
@end example
|
|
|
|
@samp{%d} is replaced by the image number.
|
|
|
|
@file{img%03d.jpg} generates @file{img001.jpg}, @file{img002.jpg}, etc...
|
|
|
|
The same system is used for the other image formats.
|
|
|
|
@section FFmpeg does not support codec XXX. Can you include a Windows DLL loader to support it ?
|
|
|
|
No. FFmpeg only supports open source codecs. Windows DLLs are not
|
|
portable, bloated and often slow.
|
|
|
|
@section How can I read from the standard input or write to the standard output ?
|
|
|
|
Use @file{-} as filename.
|
|
|
|
@section Why Audio is not decoded in VOB files ?
|
|
|
|
AC3 decoding is optional as the codec is currently released under the
|
|
GPL. Enable it with @code{./configure --enable-a52}. Take care: by
|
|
enabling AC3, you automatically change the license of libavcodec from
|
|
LGPL to GPL.
|
|
|
|
@chapter Development
|
|
|
|
@section Are there examples of use of the FFmpeg libraries libavcodec and libavformat ?
|
|
|
|
Yes. Read the Developers Guide of the FFmpeg documentation.
|
|
|
|
@section Can you support my C compiler XXX ?
|
|
|
|
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}s
|
|
related to the compiler.
|
|
|
|
@section Can I use FFmpeg or libavcodec under Windows ?
|
|
|
|
Yes, but the MinGW tools @emph{must} be used to compile FFmpeg. You
|
|
can link the resulting DLLs with any other Windows program. Read the
|
|
@emph{Native Windows Compilation} section in the FFmpeg documentation
|
|
to have more information.
|
|
|
|
@section Can you add automake, libtool or autoconf support ?
|
|
|
|
No. These tools are too blowted and they complicate the build. Moreover,
|
|
since only @samp{gcc} is supported they would add little advantages in
|
|
terms of portability.
|
|
|
|
@bye
|