[GRASS-user] error building recent grass-svn versions

[Glynn Clements]

Vincent Bain wrote:

> Thank you Glynn for your answer, I'll trim my configure command.
> If I ever need to output video, what is the minimum version of avcodec
> to build against ?

I don't know.

Actually, the OSGF library attempts to support older versions:

	#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(52, 100, 0)
	        if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) { 
	#else
		if (avio_open(&oc->pb, filename, AVIO_FLAG_WRITE) < 0) {
	#endif

So it will use the old API for versions of libavformat prior to
52.100.0.

Presumably that version number should be higher; your error message
suggest that you're using a newer version but which doesn't define the
newer macro.

I have no idea how the package versions (e.g. 5:0.7.15-dmo1)
correspond to ffmpeg's internal version numbers. E.g. here I have
ffmpeg-0.10.3, which has:

	Library		Version		Defined in header

	libavutil	51.35.100	libavutil/avutil.h
	libavformat	53.32.100	libavformat/version.h
	libavcodec	53.61.100	libavcodec/version.h
	libavdevice	53.4.100	libavdevice/avdevice.h
	libavfilter	2.61.100	libavfilter/version.h

-- 
Glynn Clements <glynn at gclements.plus.com>