ffmpeg | branch: master | Marton Balint <c...@passwd.hu> | Sun Jul 6 11:28:13 2025 +0200| [7d54fad868cf9dbab5c79856217167056e89040a] | committer: Marton Balint
fftools/ffmpeg: add support for setting maximum buffered frames in a filtergraph Signed-off-by: Marton Balint <c...@passwd.hu> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7d54fad868cf9dbab5c79856217167056e89040a --- doc/ffmpeg.texi | 9 +++++++++ fftools/ffmpeg.h | 1 + fftools/ffmpeg_filter.c | 6 ++++++ fftools/ffmpeg_opt.c | 4 ++++ 4 files changed, 20 insertions(+) diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 35675b5309..6dea7ce7a0 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -1384,6 +1384,15 @@ 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 -filter_buffered_frames @var{nb_frames} (@emph{global}) +Defines the maximum number of buffered frames allowed in a filtergraph. Under +normal circumstances, a filtergraph should not buffer more than a few frames, +especially if frames are being fed to it and read from it in a balanced way +(which is the intended behavior in ffmpeg). That said, this option allows you +to limit the total number of frames buffered across all links in a filtergraph. +If more frames are generated, filtering is aborted and an error is returned. +The default value is 0, which means no limit. + @item -pre[:@var{stream_specifier}] @var{preset_name} (@emph{output,per-stream}) Specify the preset for matching stream(s). diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h index 7868f3d85f..53f71bc080 100644 --- a/fftools/ffmpeg.h +++ b/fftools/ffmpeg.h @@ -737,6 +737,7 @@ extern float max_error_rate; extern char *filter_nbthreads; extern int filter_complex_nbthreads; +extern int filter_buffered_frames; extern int vstats_version; extern int print_graphs; extern char *print_graphs_file; diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c index f6e496158c..d6f9c610d6 100644 --- a/fftools/ffmpeg_filter.c +++ b/fftools/ffmpeg_filter.c @@ -1949,6 +1949,12 @@ static int configure_filtergraph(FilterGraph *fg, FilterGraphThread *fgt) fgt->graph->nb_threads = filter_complex_nbthreads; } + if (filter_buffered_frames) { + ret = av_opt_set_int(fgt->graph, "max_buffered_frames", filter_buffered_frames, 0); + if (ret < 0) + return ret; + } + hw_device = hw_device_for_filter(); ret = graph_parse(fg, fgt->graph, graph_desc, &inputs, &outputs, hw_device); diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c index 3d1efe32f9..d714a1523a 100644 --- a/fftools/ffmpeg_opt.c +++ b/fftools/ffmpeg_opt.c @@ -75,6 +75,7 @@ int stdin_interaction = 1; float max_error_rate = 2.0/3; char *filter_nbthreads; int filter_complex_nbthreads = 0; +int filter_buffered_frames = 0; int vstats_version = 2; int print_graphs = 0; char *print_graphs_file = NULL; @@ -1714,6 +1715,9 @@ const OptionDef options[] = { { "filter_threads", OPT_TYPE_FUNC, OPT_FUNC_ARG | OPT_EXPERT, { .func_arg = opt_filter_threads }, "number of non-complex filter threads" }, + { "filter_buffered_frames", OPT_TYPE_INT, OPT_EXPERT, + { &filter_buffered_frames }, + "maximum number of buffered frames in a filter graph" }, #if FFMPEG_OPT_FILTER_SCRIPT { "filter_script", OPT_TYPE_STRING, OPT_PERSTREAM | OPT_EXPERT | OPT_OUTPUT, { .off = OFFSET(filter_scripts) }, _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
