[FFmpeg-devel] [PATCH 25/57] avcodec/me_cmp, motion_est: Sanitize permissible cmp_funcs

[Andreas Rheinhardt]

Michael Niedermayer:
> On Wed, Jun 12, 2024 at 03:48:21PM +0200, Andreas Rheinhardt wrote:
>> Several of the potential choices of comparison functions
>> need an initialized MpegEncContext (initialized for encoding,
>> not only ff_mpv_common_init()) or they crash when called.
>> Modify ff_set_cmp() to check for this.
>>
>> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
>> ---
> 
> I dont think they always crashed, so to me marking these as
> unsupported now feels a bit strange. But it shows we where lacking
> testing

Why don't you just try:
for codec in svq1 snow; do for cmp in dct psnr bit rd dctmax 14; do
./ffmpeg_g -hide_banner -filter_complex nullsrc -c:v "$codec" -cmp
"$cmp" -f null -; done; done
yourself?

- Andreas