[FFmpeg-devel] Re: [PATCH] avformat/wavenc: use RF64 when needed

["Jason A. Donenfeld via ffmpeg-devel" <ffmpeg-devel@ffmpeg.org>]

Hi Daniel,

On Wed, Dec 31, 2025 at 8:43 AM Daniel Verkamp <daniel@drv.nu> wrote:
> The compatibility issue I mentioned is not related to the RIFF versus
> RF64 format change (which only triggers for large files, as you
> mentioned); it's that adding the extra reserved space for the
> potentially-needed RF64 header extension, which always happens in
> `-rf64 auto` mode even if the file ends up being a normal WAV and not
> RF64, causes the headers prior to the audio data to not be the exact
> 44-byte size expected by (buggy) software.

Ahh, thank you for the explanation. This also explains what Michael
found in his failed test.

> So in summary, I think switching to `-rf64 auto` by default is fine.
> It just needs a FATE reference update as Michael mentioned; `make
> fate-rsync` to get the samples and then `make fate GEN=1` should take
> care of most of the necessary updates.

Will do. Thanks for laying this out for me. v2 on its way.

Jason
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