[FFmpeg-devel] [PATCH] Document that av_write_header can change stream time_base.

[Baptiste Coudurier]

On 1/29/11 4:54 AM, Reimar D?ffinger wrote:
> ---
>  libavformat/avformat.h |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/libavformat/avformat.h b/libavformat/avformat.h
> index f9f9be5..5e01922 100644
> --- a/libavformat/avformat.h
> +++ b/libavformat/avformat.h
> @@ -507,6 +507,8 @@ typedef struct AVStream {
>       * This is the fundamental unit of time (in seconds) in terms
>       * of which frame timestamps are represented. For fixed-fps content,
>       * time base should be 1/framerate and timestamp increments should be 1.
> +     * decoding: set by libavformat
> +     * encoding: set by user, possibly modified by libavformat in av_write_header
>       */

Setting time_base in AVStream when muxing doesn't work directly.
User has to use AVCodecContext->time_base, which is used to specify the
frame rate usually, for VFR set it to arbitrary large denominator value.

-- 
Baptiste COUDURIER
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