On Fri, Dec 31, 2021 at 08:11:46PM -0500, John-Paul Stewart wrote:
> Changed in v2:
>     Allocate the audio stream first to maintain consistent behaviour
>     with prior code.
> 
> Recent discussion on the list led me to realize that libavformat was
> unconditionally creating an audio stream for all SGI movie format
> (version 2) files, even when no audio is present in the file.  
> 
> A sample of a movie file with no audio can be found at
>     http://www.personalprojects.net/ffmpeg/silent.movie
> 
> Unpatched ffmpeg will report an audio stream even though no audio is
> present.  After the following patch no audio stream is reported.
> 
> Incidentally, the silent.movie sample above is at 25fps and can also be
> used by anyone who wants to double-check the earlier patch 3c9ffbd009
> that reads and sets the framerate.  The sample file is only about 88 KB.

v2 patchset looks good to me. I will apply in a couple of days. Thanks.

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)