[FFmpeg-devel] [PATCH] examples/muxing: set sample formats from list of codec supported sample formats
wm4
nfxjfg at googlemail.com
Tue Jan 7 15:12:21 CET 2014
On Tue, 7 Jan 2014 13:05:52 +0100
Stefano Sabatini <stefasab at gmail.com> wrote:
> Avoid the need of tweaking, also show how to get list of supported sample
> formats.
> ---
> doc/examples/muxing.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/doc/examples/muxing.c b/doc/examples/muxing.c
> index 4cd3f65..4cf72e5 100644
> --- a/doc/examples/muxing.c
> +++ b/doc/examples/muxing.c
> @@ -73,7 +73,8 @@ static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
>
> switch ((*codec)->type) {
> case AVMEDIA_TYPE_AUDIO:
> - c->sample_fmt = AV_SAMPLE_FMT_FLTP;
> + c->sample_fmt = (*codec)->sample_fmts ?
> + (*codec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP;
Why can this be NULL, and why is AV_SAMPLE_FMT_FLTP a valid fallback?
(I know, avcodec.h documents that NULL means unknown, but that's
confusing.)
> c->bit_rate = 64000;
> c->sample_rate = 44100;
> c->channels = 2;
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