[FFmpeg-devel] [PATCH v7 3/3] fftools: add options to dump filter graph

[lance.lmwang at gmail.com]

From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
 doc/ffmpeg.texi         | 12 ++++++++++++
 fftools/ffmpeg.c        |  1 +
 fftools/ffmpeg.h        |  1 +
 fftools/ffmpeg_filter.c | 11 +++++++++++
 fftools/ffmpeg_opt.c    | 10 ++++++++++
 5 files changed, 35 insertions(+)

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index ed437bb..c7dd73b 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -735,6 +735,18 @@ Technical note -- attachments are implemented as codec extradata, so this
 option can actually be used to extract extradata from any stream, not just
 attachments.
 
+ at item dump_filtergraph @var{options} (@emph{global})
+Dump graph to stderr with more options
+
+options is a ':'-separated list of @var{key=value} pairs.
+
+Set the graph with graphviz DOT format by @var{fmt=dot|DOT},
+set the filename of filtergraph to output by @var{filename=path}.
+
+ at example
+ffmpeg -dump_filtergraph fmt=dot:filename=./test.tmp -i INPUT
+ at end example
+
 @item -noautorotate
 Disable automatically rotating video based on file metadata.
 
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index f697460..2c611a7 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -625,6 +625,7 @@ static void ffmpeg_cleanup(int ret)
                    av_err2str(AVERROR(errno)));
     }
     av_freep(&vstats_filename);
+    av_freep(&dump_filtergraph);
 
     av_freep(&input_streams);
     av_freep(&input_files);
diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 38205a1..000c682 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -578,6 +578,7 @@ extern int        nb_filtergraphs;
 
 extern char *vstats_filename;
 extern char *sdp_filename;
+extern char *dump_filtergraph;
 
 extern float audio_drift_threshold;
 extern float dts_delta_threshold;
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 8b5b157..c5adfae 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -1106,6 +1106,17 @@ int configure_filtergraph(FilterGraph *fg)
     if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
         goto fail;
 
+    if (dump_filtergraph) {
+        char *dump = avfilter_graph_dump(fg->graph, dump_filtergraph);
+        if (!dump) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+        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 60bb437..e4ebc88 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -143,6 +143,7 @@ HWDevice *filter_hw_device;
 
 char *vstats_filename;
 char *sdp_filename;
+char *dump_filtergraph;
 
 float audio_drift_threshold = 0.1;
 float dts_delta_threshold   = 10;
@@ -2914,6 +2915,13 @@ static int opt_vstats_file(void *optctx, const char *opt, const char *arg)
     return 0;
 }
 
+static int opt_dumpgraph(void *optctx, const char *opt, const char *arg)
+{
+    av_free (dump_filtergraph);
+    dump_filtergraph = av_strdup(arg);
+    return 0;
+}
+
 static int opt_vstats(void *optctx, const char *opt, const char *arg)
 {
     char filename[40];
@@ -3548,6 +3556,8 @@ const OptionDef options[] = {
     { "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC |
                          OPT_EXPERT | OPT_INPUT,                     { .off = OFFSET(dump_attachment) },
         "extract an attachment into a file", "filename" },
+    { "dump_filtergraph",HAS_ARG | OPT_EXPERT,                       { .func_arg = opt_dumpgraph },
+        "dump filter graph to stderr with options"},
     { "stream_loop", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_INPUT |
                         OPT_OFFSET,                                  { .off = OFFSET(loop) }, "set number of times input stream shall be looped", "loop count" },
     { "debug_ts",       OPT_BOOL | OPT_EXPERT,                       { &debug_ts },
-- 
2.6.4