On Sat, July 10, 2010 2:27 pm, Yang Zhe wrote:
> I see it is because of the below change in libavcodec/util.c,
> - avctx->codec_id = codec->id;
> + if ((avctx->codec_type == CODEC_TYPE_UNKNOWN || avctx->codec_type
> == codec->type) &&
> + avctx->codec_id == CODEC_ID_NONE) {
> + avctx->codec_type = codec->type;
> + avctx->codec_id = codec->id;
> + }
> + if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
> + av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
> + goto free_and_end;
> + }
>
> but I can't understand that in xmms2-0.7DrNo/src/plugins/avcodec/avcodec.c
>
> data->codecctx = g_new0 (AVCodecContext, 1);
>
> is initialized to zero. In avcodec_open() function it should go into
> the first if clause. why not.
This seems to be bug 2332 ( http://bugs.xmms2.xmms.se/view.php?id=2332 ).
It is fixed in devel (
http://git.xmms.se/?p=xmms2-devel.git;a=commit;h=71666f5ac8465fc40c8220043174f45e7088c3f0
).
Maybe it is neater to use avcodec_alloc_context() as suggested in
avcodec.h at avcodec_open (and at
http://wiki.aasimon.org/doku.php?id=ffmpeg:avcodec_open ) instead of
g_new0 to make sure such a bug will not show up again with a new version
of avcodec.
(Also it doesn't seem data->codecctx is freed anywhere?)
Regards,
Erik Massop / nesciens
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