[FFmpeg-devel] [PATCH] RF64 demuxer

[Michael Niedermayer]

On Thu, Oct 01, 2009 at 06:07:45PM -0500, Daniel Verkamp wrote:
> Hi,
> 
> Attached is a patch for a RF64 demuxer.  This is an extension of the
> normal WAV format that allows files larger than 4 GB. Specs are
> available at:
> http://tech.ebu.ch/docs/tech/tech3306-2009.pdf
> 
> I've tested the demuxer with files generated by this closed-source Windows app:
> ftp://infomaterial:infomaterial at ftp.david-gmbh.de/2_applications/RF64Generator.zip
> 
> It only creates RF64 for the  >4GB case, so it is not easy to upload a
> full sample, but I have uploaded the first megabyte of one here:
> http://drv.nu/temp/rf64-cut.wav

you can create a repeative or silence sample and compress it, 4gb of zeros
should be small with a good compressor


[...]
> +/** Get RF64-style 64-bit integer */
> +static int64_t get_rf64(ByteIOContext *pb)
> +{
> +    int64_t val;
> +    val  = get_le32(pb);
> +    val |= (int64_t)get_le32(pb) << 32;
> +    return val;
> +}

get_le64() ?



> +
> +static int rf64_read_header(AVFormatContext *s, AVFormatParameters *ap)

this looks similar enough to the normal one to be merged with it

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

There will always be a question for which you do not know the correct awnser.
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