shithub: libvpx

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Added option to skip first n frame to vpxenc

this commit added a command line option to skip first n frames from
input file to facilitate debugging and testing.

Change-Id: I4ffc5f85fa7e193ea4bdee08cb236717de8beef1

--- a/vpxenc.c

+++ b/vpxenc.c

@@ -925,6 +925,8 @@

         "First pass statistics file name");

 static const arg_def_t limit = ARG_DEF(NULL, "limit", 1,

                                        "Stop encoding after n input frames");

+static const arg_def_t skip = ARG_DEF(NULL, "skip", 1,

+                                       "Skip the first n input frames");

 static const arg_def_t deadline         = ARG_DEF("d", "deadline", 1,

         "Deadline per frame (usec)");

 static const arg_def_t best_dl          = ARG_DEF(NULL, "best", 0,

@@ -1456,6 +1458,7 @@

     int                      arg_usage = 0, arg_passes = 1, arg_deadline = 0;

     int                      arg_ctrls[ARG_CTRL_CNT_MAX][2], arg_ctrl_cnt = 0;

     int                      arg_limit = 0;

+    int                      arg_skip  = 0;

     static const arg_def_t **ctrl_args = no_args;

     static const int        *ctrl_args_map = NULL;

     int                      verbose = 0, show_psnr = 0;

@@ -1547,6 +1550,8 @@

             verbose = 1;

         else if (arg_match(&arg, &limit, argi))

             arg_limit = arg_parse_uint(&arg);

+        else if (arg_match(&arg, &skip, argi))

+            arg_skip = arg_parse_uint(&arg);

         else if (arg_match(&arg, &psnrarg, argi))

             show_psnr = 1;

         else if (arg_match(&arg, &framerate, argi))

@@ -1753,6 +1758,7 @@

     {

         int frames_in = 0, frames_out = 0;

         unsigned long nbytes = 0;

+        int skip_frames = 0;

         struct detect_buffer detect;

         /* Parse certain options from the input file, if possible */

@@ -1946,12 +1952,23 @@

             if (vpx_codec_control_(&encoder, arg_ctrls[i][0], arg_ctrls[i][1]))

                 fprintf(stderr, "Error: Tried to set control %d = %d\n",

                         arg_ctrls[i][0], arg_ctrls[i][1]);

-

             ctx_exit_on_error(&encoder, "Failed to control codec");

         }

         frame_avail = 1;

         got_data = 0;

+

+        skip_frames = arg_skip;

+        while(skip_frames)

+        {

+            frame_avail = read_frame(infile, &raw, file_type, &y4m, &detect);

+            if (!frame_avail)

+                break;

+            skip_frames--;

+            fprintf(stderr,

+                "\rPass %d/%d frame %4d/%-4d %7ldB \033[K", pass + 1,

+                arg_passes, skip_frames, frames_out, nbytes);

+        }

         while (frame_avail || got_data)

         {

-- 

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