need to fix argument in the main function, but how ?

Hi all,
I need to fix some arguments or defualt arguments in the main function below, but i don't know how, all what i've test does not work, thanks for your help. It's ffmpeg.c source and i need to fix input stream and output stream as follow:
ffmpeg -i rtsp://host/live -f flv rtmp://remotehost/live

Code:

---

int main(int argc, char **argv)
{
int i, ret;
BenchmarkTimeStamps ti;

init_dynload();

register_exit(ffmpeg_cleanup);

setvbuf(stderr,NULL,_IONBF,0);


av_log_set_flags(AV_LOG_SKIP_REPEATED);
parse_loglevel(argc, argv, options);


if(argc>1 && !strcmp(argv[1], "-d")){
run_as_daemon=1;
av_log_set_callback(log_callback_null);
argc--;
argv++;
}



#if CONFIG_AVDEVICE
avdevice_register_all();
#endif
avformat_network_init();

show_banner(argc, argv, options);

/* parse options and open all input/output files */
ret = ffmpeg_parse_options(argc, argv);
if (ret < 0)
exit_program(1);

if (nb_output_files <= 0 && nb_input_files == 0) {
show_usage();
av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
exit_program(1);
}

/* file converter / grab */
if (nb_output_files <= 0) {
av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
exit_program(1);
}

for (i = 0; i < nb_output_files; i++) {
if (strcmp(output_files[i]->ctx->oformat->name, "rtp"))
want_sdp = 0;
}

/* current_time = ti = get_benchmark_time_stamps();*/
if (transcode() < 0)
exit_program(1);
if (do_benchmark) {
int64_t utime, stime, rtime;
current_time = get_benchmark_time_stamps();
utime = current_time.user_usec - ti.user_usec;
stime = current_time.sys_usec - ti.sys_usec;
rtime = current_time.real_usec - ti.real_usec;
av_log(NULL, AV_LOG_INFO,
"bench: utime=%0.3fs stime=%0.3fs rtime=%0.3fs\n",
utime / 1000000.0, stime / 1000000.0, rtime / 1000000.0);
}

av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" frames successfully decoded, %"PRIu64" decoding errors\n",
decode_error_stat[0], decode_error_stat[1]);
if ((decode_error_stat[0] + decode_error_stat[1]) * max_error_rate < decode_error_stat[1])
exit_program(69);

exit_program(received_nb_signals ? 255 : main_return_code);
return main_return_code;
}

---

TBH, I'd do this using a 1-line bash script.

Code:

---

#!/bin/bash
ffmpeg -i rtsp://host/live -f flv rtmp://remotehost/live $*

---

But if you really want to maul the code about, then you could do

Code:

---

char **newargv = malloc(argc+5,sizeof(*newargv));
newargv[0] = argv[0];
newargv[1] = "-i";
newargv[2] = "rtsp://host/live";
//
for ( int i = 1, j = 6 ; i < argc ; i++, j++ ) newargc[j] = argv[i];

---

Thank you salemn for your help.

Yes i don't want a shell script for security reason. I really need to hardcode this in the ffmpeg source.

When i try the code you gave me i cannot compile:

Code:

---

int main(int argc, char **argv){
    int i, ret;
    BenchmarkTimeStamps ti;


    char **newargv = malloc(argc+5,sizeof(*newargv));
    newargv[0] = argv[0];
    newargv[1] = "-i";
    newargv[2] = "rtsp://host/live";


    for ( int i = 1, j = 6 ; i < argc ; i++, j++ ) newargc[j] = argv[i]


    init_dynload();


    register_exit(ffmpeg_cleanup);


    setvbuf(stderr,NULL,_IONBF,0);




    av_log_set_flags(AV_LOG_SKIP_REPEATED);
    parse_loglevel(argc, argv, options);

---

fftools/ffmpeg.c: In function âdo_streamcopyâ:
fftools/ffmpeg.c:2074:5: warning: âav_copy_packet_side_dataâ is deprecated [-Wdeprecated-declarations]
av_copy_packet_side_data(&opkt, pkt);
^~~~~~~~~~~~~~~~~~~~~~~~
In file included from ./libavformat/avformat.h:317:0,
from fftools/ffmpeg.c:43:
./libavcodec/avcodec.h:4463:5: note: declared here
int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src);
^~~~~~~~~~~~~~~~~~~~~~~~
fftools/ffmpeg.c: In function âinit_output_streamâ:
fftools/ffmpeg.c:3545:9: warning: âavcodec_copy_contextâ is deprecated [-Wdeprecated-declarations]
ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
^~~
In file included from ./libavformat/avformat.h:317:0,
from fftools/ffmpeg.c:43:
./libavcodec/avcodec.h:4235:5: note: declared here
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
^~~~~~~~~~~~~~~~~~~~
fftools/ffmpeg.c:3545:9: warning: âcodecâ is deprecated [-Wdeprecated-declarations]
ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
^~~
In file included from fftools/ffmpeg.c:43:0:
./libavformat/avformat.h:885:21: note: declared here
AVCodecContext *codec;
^~~~~
fftools/ffmpeg.c:3591:9: warning: âcodecâ is deprecated [-Wdeprecated-declarations]
ost->st->codec->codec= ost->enc_ctx->codec;
^~~
In file included from fftools/ffmpeg.c:43:0:
./libavformat/avformat.h:885:21: note: declared here
AVCodecContext *codec;
^~~~~
fftools/ffmpeg.c: In function âcheck_keyboard_interactionâ:
fftools/ffmpeg.c:3974:13: warning: âcodecâ is deprecated [-Wdeprecated-declarations]
debug = input_streams[0]->st->codec->debug<<1;
^~~~~
In file included from fftools/ffmpeg.c:43:0:
./libavformat/avformat.h:885:21: note: declared here
AVCodecContext *codec;
^~~~~
fftools/ffmpeg.c:3997:13: warning: âcodecâ is deprecated [-Wdeprecated-declarations]
input_streams[i]->st->codec->debug = debug;
^~~~~~~~~~~~~
In file included from fftools/ffmpeg.c:43:0:
./libavformat/avformat.h:885:21: note: declared here
AVCodecContext *codec;
^~~~~
fftools/ffmpeg.c: In function âmainâ:
fftools/ffmpeg.c:4848:22: error: too many arguments to function âmallocâ

Quote:

---

Originally Posted by Salem

TBH, I'd do this using a 1-line bash script.

Code:

---

#!/bin/bash
ffmpeg -i rtsp://host/live -f flv rtmp://remotehost/live $*

---

But if you really want to maul the code about, then you could do

Code:

---

char **newargv = malloc(argc+5,sizeof(*newargv));
newargv[0] = argv[0];
newargv[1] = "-i";
newargv[2] = "rtsp://host/live";
//
for ( int i = 1, j = 6 ; i < argc ; i++, j++ ) newargc[j] = argv[i];

---

---

Yeah, should be
malloc((argc+5)*sizeof(*newargv));

got sorry ..... still errors on compile:

fftools/ffmpeg.c:4850:52: error: ânewargcâ undeclared (first use in this function); did you mean ânewargvâ?
for ( int i = 1, j = 3 ; i < argc ; i++, j++ ) newargc[j] = argv[i]
^~~~~~~
newargv
fftools/ffmpeg.c:4850:52: note: each undeclared identifier is reported only once for each function it appears in
fftools/ffmpeg.c:4851:5: error: expected â;â before âintâ
int i, ret;
^~~
fftools/ffmpeg.c:4852:5: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
BenchmarkTimeStamps ti;
^~~~~~~~~~~~~~~~~~~
fftools/ffmpeg.c:4882:5: error: âretâ undeclared (first use in this function); did you mean âcreatâ?
ret = ffmpeg_parse_options(argc, argv);
^~~
creat
fftools/ffmpeg.c:4898:10: error: âiâ undeclared (first use in this function); did you mean âtiâ?
for (i = 0; i < nb_output_files; i++) {
^
ti

The error about newargc is very clear, I think you can fix the typo yourself. And for the other errors, I believe those can be fixed by moving the declarations to the beginning of function.

Converting C99 code to C90 is left as an exercise for the reader.

Since you didn't say "I'm a completely clueless noob", I assumed a basic modicum of skill.