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ffmpeg: parameters for filter thread counts

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Enables specifying how many threads are available to each filtergraph.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
DeHackEd 2016-10-30 09:25:39 -04:00 committed by Michael Niedermayer
parent b54fd42d7d
commit 6d50dff816
4 changed files with 24 additions and 0 deletions
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10
doc/ffmpeg.texi
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@ -415,6 +415,11 @@ This option is similar to @option{-filter}, the only difference is that its
argument is the name of the file from which a filtergraph description is to be
read.
@item -filter_threads @var{nb_threads} (@emph{global})
Defines how many threads are used to process a filter pipeline. Each pipeline
will produce a thread pool with this many threads available for parallel processing.
The default is the number of available CPUs.
@item -pre[:@var{stream_specifier}] @var{preset_name} (@emph{output,per-stream})
Specify the preset for matching stream(s).
@ -1201,6 +1206,11 @@ To generate 5 seconds of pure red video using lavfi @code{color} source:
ffmpeg -filter_complex 'color=c=red' -t 5 out.mkv
@end example
@item -filter_complex_threads @var{nb_threads} (@emph{global})
Defines how many threads are used to process a filter_complex graph.
Similar to filter_threads but used for @code{-filter_complex} graphs only.
The default is the number of available CPUs.
@item -lavfi @var{filtergraph} (@emph{global})
Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or
outputs. Equivalent to @option{-filter_complex}.

3
ffmpeg.h
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@ -581,6 +581,9 @@ extern AVIOContext *progress_avio;
extern float max_error_rate;
extern char *videotoolbox_pixfmt;
extern int filter_nbthreads;
extern int filter_complex_nbthreads;
extern const AVIOInterruptCB int_cb;
extern const OptionDef options[];

7
ffmpeg_filter.c
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@ -39,6 +39,9 @@
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
int filter_nbthreads = -1;
int filter_complex_nbthreads = -1;
static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
{
static const enum AVPixelFormat mjpeg_formats[] =
@ -991,6 +994,8 @@ int configure_filtergraph(FilterGraph *fg)
char args[512];
AVDictionaryEntry *e = NULL;
fg->graph->nb_threads = filter_complex_nbthreads;
args[0] = 0;
while ((e = av_dict_get(ost->sws_dict, "", e,
AV_DICT_IGNORE_SUFFIX))) {
@ -1021,6 +1026,8 @@ int configure_filtergraph(FilterGraph *fg)
e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
if (e)
av_opt_set(fg->graph, "threads", e->value, 0);
} else {
fg->graph->nb_threads = filter_nbthreads;
}
if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)

4
ffmpeg_opt.c
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@ -3381,12 +3381,16 @@ const OptionDef options[] = {
"set profile", "profile" },
{ "filter", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filters) },
"set stream filtergraph", "filter_graph" },
{ "filter_threads", HAS_ARG | OPT_INT, { &filter_nbthreads },
"number of non-complex filter threads" },
{ "filter_script", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filter_scripts) },
"read stream filtergraph description from a file", "filename" },
{ "reinit_filter", HAS_ARG | OPT_INT | OPT_SPEC | OPT_INPUT, { .off = OFFSET(reinit_filters) },
"reinit filtergraph on input parameter changes", "" },
{ "filter_complex", HAS_ARG | OPT_EXPERT, { .func_arg = opt_filter_complex },
"create a complex filtergraph", "graph_description" },
{ "filter_complex_threads", HAS_ARG | OPT_INT, { &filter_complex_nbthreads },
"number of threads for -filter_complex" },
{ "lavfi", HAS_ARG | OPT_EXPERT, { .func_arg = opt_filter_complex },
"create a complex filtergraph", "graph_description" },
{ "filter_complex_script", HAS_ARG | OPT_EXPERT, { .func_arg = opt_filter_complex_script },