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ffmpeg_opt: Add -hwaccels option that lists all supported hwaccels

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This commit is contained in:
Timothy Gu 2015-08-25 16:43:53 -07:00
parent 33908f0837
commit da0e76955a
2 changed files with 18 additions and 0 deletions
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4
doc/ffmpeg.texi
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@ -698,6 +698,10 @@ is not specified, the value of the @var{DISPLAY} environment variable is used
For DXVA2, this option should contain the number of the display adapter to use.
If this option is not specified, the default adapter is used.
@end table
@item -hwaccels
List all hardware acceleration methods supported in this build of ffmpeg.
@end table
@section Audio Options

14
ffmpeg_opt.c
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@ -166,6 +166,18 @@ static void init_options(OptionsContext *o)
o->accurate_seek = 1;
}
static int show_hwaccels(void *optctx, const char *opt, const char *arg)
{
int i;
printf("Hardware acceleration methods:\n");
for (i = 0; i < FF_ARRAY_ELEMS(hwaccels) - 1; i++) {
printf("%s\n", hwaccels[i].name);
}
printf("\n");
return 0;
}
/* return a copy of the input with the stream specifiers removed from the keys */
static AVDictionary *strip_specifiers(AVDictionary *dict)
{
@ -3241,6 +3253,8 @@ const OptionDef options[] = {
#if CONFIG_VDA || CONFIG_VIDEOTOOLBOX
{ "videotoolbox_pixfmt", HAS_ARG | OPT_STRING | OPT_EXPERT, { &videotoolbox_pixfmt}, "" },
#endif
{ "hwaccels", OPT_EXIT, { .func_arg = show_hwaccels },
"show available HW acceleration methods" },
{ "autorotate", HAS_ARG | OPT_BOOL | OPT_SPEC |
OPT_EXPERT | OPT_INPUT, { .off = OFFSET(autorotate) },
"automatically insert correct rotate filters" },