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LAVFAPI: avformat_alloc_output_context() / simplify usage of muxers.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-04-30 20:43:16 +02:00
parent a2eef3e9f5
commit 7d727f1338
3 changed files with 55 additions and 21 deletions
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44
libavformat/utils.c
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@@ -2719,6 +2719,50 @@ int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
return 0;
}
AVFormatContext *avformat_alloc_output_context(const char *format, AVOutputFormat *oformat, const char *filename){
AVFormatContext *s= avformat_alloc_context();
if(!s)
goto nomem;
if(!oformat){
if (format) {
oformat = av_guess_format(format, NULL, NULL);
if (!oformat) {
av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
goto error;
}
} else {
oformat = av_guess_format(NULL, filename, NULL);
if (!oformat) {
av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
filename);
goto error;
}
}
}
s->oformat= oformat;
if (s->oformat->priv_data_size > 0) {
s->priv_data = av_mallocz(s->oformat->priv_data_size);
if (!s->priv_data)
goto nomem;
if (s->oformat->priv_class) {
*(const AVClass**)s->priv_data= s->oformat->priv_class;
av_opt_set_defaults(s->priv_data);
}
} else
s->priv_data = NULL;
if(filename)
av_strlcpy(s->filename, filename, sizeof(s->filename));
return s;
nomem:
av_log(s, AV_LOG_ERROR, "Out of memory\n");
error:
avformat_free_context(s);
return NULL;
}
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
{
const AVCodecTag *avctag;