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| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2014-12-04 19:09:40 +0000 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2015-02-17 11:27:42 -0500 |
| commit | bb7701684c7170dfd5f33a3c7d827265844619f2 (patch) | |
| tree | df7673729b38d7e611948d5c3d98aa79ac57f45d /libavformat/avformat.h | |
| parent | cb70a93ca1e7fae1b5dfb65ad149d311a65206a4 (diff) | |
lavf: Document the codec context initialization
During remuxing avcodec_copy_context() is discouraged as certain fields
(such as codec_tag) could reflect invalid values between input and
output contextes.
Diffstat (limited to 'libavformat/avformat.h')
| -rw-r--r-- | libavformat/avformat.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 0994c8075e..aa11cff2f3 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -198,6 +198,10 @@ * be set to the timebase that the caller desires to use for this stream (note * that the timebase actually used by the muxer can be different, as will be * described later). + * - It is advised to manually initialize only the relevant fields in + * AVCodecContext, rather than using @ref avcodec_copy_context() during + * remuxing: there is no guarantee that the codec context values remain valid + * for both input and output format contexts. * - The caller may fill in additional information, such as @ref * AVFormatContext.metadata "global" or @ref AVStream.metadata "per-stream" * metadata, @ref AVFormatContext.chapters "chapters", @ref |