mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 13:10:37 +00:00
74 lines
2.1 KiB
Plaintext
74 lines
2.1 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.
|
|
|
|
@chapter Development
|
|
|
|
@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 I want to use ffmpeg or libavcodec under Windows. Can you support my proprietary C compiler XXX ?
|
|
|
|
No. Use @code{mingw-gcc} available at @url{http://www.mingw.org/} to
|
|
compile the code. It generates object files fully compatible with other
|
|
windows compilers.
|
|
|
|
@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
|