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ffmpeg_opt: Do not overwrite output if there is no input

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Fixes Ticket4254

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-27 00:42:26 +01:00
parent dcac15a84c
commit 6a3833e141
1 changed files with 15 additions and 0 deletions
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15
ffmpeg_opt.c
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@ -110,6 +110,7 @@ static int no_file_overwrite = 0;
static int do_psnr = 0; static int do_psnr = 0;
static int input_sync; static int input_sync;
static int override_ffserver = 0; static int override_ffserver = 0;
static int input_stream_potentially_available = 0;
static void uninit_options(OptionsContext *o) static void uninit_options(OptionsContext *o)
{ {
@ -1008,6 +1009,8 @@ static int open_input_file(OptionsContext *o, const char *filename)
av_dict_free(&opts[i]); av_dict_free(&opts[i]);
av_freep(&opts); av_freep(&opts);
input_stream_potentially_available = 1;
return 0; return 0;
} }
@ -2104,6 +2107,12 @@ loop_end:
} }
} }
if (!(oc->oformat->flags & AVFMT_NOSTREAMS) && !input_stream_potentially_available) {
av_log(NULL, AV_LOG_ERROR,
"No input streams but output needs an input stream\n");
exit_program(1);
}
if (!(oc->oformat->flags & AVFMT_NOFILE)) { if (!(oc->oformat->flags & AVFMT_NOFILE)) {
/* test if it already exists to avoid losing precious files */ /* test if it already exists to avoid losing precious files */
assert_file_overwrite(filename); assert_file_overwrite(filename);
@ -2608,6 +2617,9 @@ static int opt_filter_complex(void *optctx, const char *opt, const char *arg)
filtergraphs[nb_filtergraphs - 1]->graph_desc = av_strdup(arg); filtergraphs[nb_filtergraphs - 1]->graph_desc = av_strdup(arg);
if (!filtergraphs[nb_filtergraphs - 1]->graph_desc) if (!filtergraphs[nb_filtergraphs - 1]->graph_desc)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
input_stream_potentially_available = 1;
return 0; return 0;
} }
@ -2622,6 +2634,9 @@ static int opt_filter_complex_script(void *optctx, const char *opt, const char *
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
filtergraphs[nb_filtergraphs - 1]->index = nb_filtergraphs - 1; filtergraphs[nb_filtergraphs - 1]->index = nb_filtergraphs - 1;
filtergraphs[nb_filtergraphs - 1]->graph_desc = graph_desc; filtergraphs[nb_filtergraphs - 1]->graph_desc = graph_desc;
input_stream_potentially_available = 1;
return 0; return 0;
} }