shithub: libvpx

--- a/ivfdec.c

+++ b/ivfdec.c

@@ -13,6 +13,25 @@

 #include <stdio.h>

 #include <stdlib.h>

+static void fix_framerate(int *num, int *den) {

+  // Some versions of vpxenc used 1/(2*fps) for the timebase, so

+  // we can guess the framerate using only the timebase in this

+  // case. Other files would require reading ahead to guess the

+  // timebase, like we do for webm.

+  if (*num < 1000) {

+    // Correct for the factor of 2 applied to the timebase in the encoder.

+    if (*num & 1)

+      *den *= 2;

+    else

+      *num /= 2;

+  } else {

+    // Don't know FPS for sure, and don't have readahead code

+    // (yet?), so just default to 30fps.

+    *num = 30;

+    *den = 1;

+  }

+}

 int file_is_ivf(struct VpxInputContext *input_ctx) {

   char raw_hdr[32];

   int is_ivf = 0;

@@ -32,27 +51,8 @@

       input_ctx->height = mem_get_le16(raw_hdr + 14);

       input_ctx->framerate.numerator = mem_get_le32(raw_hdr + 16);

       input_ctx->framerate.denominator = mem_get_le32(raw_hdr + 20);

-      /* Some versions of vpxenc used 1/(2*fps) for the timebase, so

-       * we can guess the framerate using only the timebase in this

-       * case. Other files would require reading ahead to guess the

-       * timebase, like we do for webm.

-       */

-      if (input_ctx->framerate.numerator < 1000) {

-        /* Correct for the factor of 2 applied to the timebase in the

-         * encoder.

-         */

-        if (input_ctx->framerate.numerator & 1)

-          input_ctx->framerate.denominator <<= 1;

-        else

-          input_ctx->framerate.numerator >>= 1;

-      } else {

-        /* Don't know FPS for sure, and don't have readahead code

-         * (yet?), so just default to 30fps.

-         */

-        input_ctx->framerate.numerator = 30;

-        input_ctx->framerate.denominator = 1;

-      }

+      fix_framerate(&input_ctx->framerate.numerator,

+                    &input_ctx->framerate.denominator);

--- a/ivfenc.c

+++ b/ivfenc.c

@@ -41,9 +41,6 @@

   char header[12];

   vpx_codec_pts_t pts;

-  if (pkt->kind != VPX_CODEC_CX_FRAME_PKT)

-    return;

   pts = pkt->data.frame.pts;

   mem_put_le32(header, (int)pkt->data.frame.sz);

   mem_put_le32(header + 4, pts & 0xFFFFFFFF);