[FFmpeg-devel] [PATCH 4/4] ffmpeg: set format_option_for_user() callback

[Michael Niedermayer]

Signed-off-by: Michael Niedermayer <michae...@gmx.at>
---
 cmdutils.c   |    6 ++++++
 cmdutils.h   |    2 ++
 ffmpeg.c     |    3 +++
 ffmpeg_opt.c |    2 ++
 4 files changed, 13 insertions(+)

diff --git a/cmdutils.c b/cmdutils.c
index db89256..f24f65d 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -2111,6 +2111,12 @@ double get_rotation(AVStream *st)
     return theta;
 }
 
+const char* format_option_for_user(void *obj, const char* name, const char* 
value, char *tmp, int tmp_len)
+{
+    snprintf(tmp, tmp_len, "add '-%s %s'", name, value);
+    return tmp;
+}
+
 #if CONFIG_AVDEVICE
 static int print_device_sources(AVInputFormat *fmt, AVDictionary *opts)
 {
diff --git a/cmdutils.h b/cmdutils.h
index a21ce35..47d1042 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -599,4 +599,6 @@ void *grow_array(void *array, int elem_size, int *size, int 
new_size);
 
 double get_rotation(AVStream *st);
 
+const char* format_option_for_user(void *obj, const char* name, const char* 
value, char *tmp, int tmp_len);
+
 #endif /* CMDUTILS_H */
diff --git a/ffmpeg.c b/ffmpeg.c
index 8c288ae..aec7f13 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2419,6 +2419,7 @@ static int init_input_stream(int ist_index, char *error, 
int error_len)
         ist->dec_ctx->get_format            = get_format;
         ist->dec_ctx->get_buffer2           = get_buffer;
         ist->dec_ctx->thread_safe_callbacks = 1;
+        av_set_format_option_for_user_func(ist->dec_ctx, 
format_option_for_user);
 
         av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
         if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
@@ -3050,6 +3051,8 @@ static int transcode_init(void)
                 av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
             av_dict_set(&ost->encoder_opts, "side_data_only_packets", "1", 0);
 
+            av_set_format_option_for_user_func(ost->enc_ctx, 
format_option_for_user);
+
             if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) 
< 0) {
                 if (ret == AVERROR_EXPERIMENTAL)
                     abort_codec_experimental(codec, 1);
diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index 240f727..bf297f0 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -901,6 +901,8 @@ static int open_input_file(OptionsContext *o, const char 
*filename)
     remove_avoptions(&o->g->format_opts, o->g->codec_opts);
     assert_avoptions(o->g->format_opts);
 
+    av_set_format_option_for_user_func(ic, format_option_for_user);
+
     /* apply forced codec ids */
     for (i = 0; i < ic->nb_streams; i++)
         choose_decoder(o, ic, ic->streams[i]);
-- 
1.7.9.5

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