Am Mi., 20. Nov. 2019 um 16:03 Uhr schrieb <lance.lmw...@gmail.com>:
>
> From: Limin Wang <lance.lmw...@gmail.com>
>
> It's useful for debugging filter graph purposes, now only lavfi can do that.
>
> Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
> ---
> doc/ffmpeg.texi | 4 ++++
> fftools/ffmpeg.h | 1 +
> fftools/ffmpeg_filter.c | 7 +++++++
> fftools/ffmpeg_opt.c | 3 +++
> 4 files changed, 15 insertions(+)
>
> diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
> index 9cccc2337d..7e55f67898 100644
> --- a/doc/ffmpeg.texi
> +++ b/doc/ffmpeg.texi
> @@ -668,6 +668,10 @@ 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_dumpgraph (@emph{global})
> +Dump filter graph to stderr. It is off by default, the option is mostly
> useful
> +for debugging filter graph purposes
> +
> @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 7b6f802082..b3133e7e99 100644
> --- a/fftools/ffmpeg.h
> +++ b/fftools/ffmpeg.h
> @@ -608,6 +608,7 @@ extern float max_error_rate;
> extern char *videotoolbox_pixfmt;
>
> extern int filter_nbthreads;
> +extern int filter_dumpgraph;
> extern int filter_complex_nbthreads;
> extern int vstats_version;
>
> diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
> index 72838de1e2..35ba3a38db 100644
> --- a/fftools/ffmpeg_filter.c
> +++ b/fftools/ffmpeg_filter.c
> @@ -1109,6 +1109,13 @@ int configure_filtergraph(FilterGraph *fg)
> if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
> goto fail;
>
> + if (filter_dumpgraph) {
> + char *dump = avfilter_graph_dump(fg->graph, NULL);
> + fputs(dump, stderr);
> + fflush(stderr);
> + av_free(dump);
> + }
> +
> /* limit the lists of allowed formats to the ones selected, to
> * make sure they stay the same if the filtergraph is reconfigured later
> */
> for (i = 0; i < fg->nb_outputs; i++) {
> diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
> index 71063cc443..44eb890e86 100644
> --- a/fftools/ffmpeg_opt.c
> +++ b/fftools/ffmpeg_opt.c
> @@ -110,6 +110,7 @@ int frame_bits_per_raw_sample = 0;
> float max_error_rate = 2.0/3;
> int filter_nbthreads = 0;
> int filter_complex_nbthreads = 0;
> +int filter_dumpgraph = 0;
> int vstats_version = 2;
>
>
> @@ -3523,6 +3524,8 @@ const OptionDef options[] = {
> "create a complex filtergraph", "graph_description" },
> { "filter_complex_threads", HAS_ARG | OPT_INT, {
> &filter_complex_nbthreads },
> "number of threads for -filter_complex" },
> + { "filter_dumpgraph", OPT_BOOL, {
> &filter_dumpgraph },
> + "dump filter graph to stderr" },
dump_filtergraph ?
Carl Eugen
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