Use input framerate as timebase if none was explicitly specified.

After patch:
$ vpxenc tennis_sif.y4m --end-usage=q -q 20 -o x.ivf --ivf --codec=vp9 --limit=30
$ ffmpeg -i x.ivf -i tennis_sif.y4m -lavfi psnr -f null -
[..]
[Parsed_psnr_0 @ 0x7f8913c21e40] PSNR y:43.270594 u:46.300362 v:47.011172 average:44.097994 min:43.460704 max:52.509271

Before patch:
$ vpxenc tennis_sif.y4m --end-usage=q -q 20 -o x.ivf --ivf --codec=vp9 --limit=30
$ ffmpeg -i x.ivf -i tennis_sif.y4m -lavfi psnr -f null -
[..]
[Parsed_psnr_0 @ 0x7fbdaac22780] PSNR y:27.427366 u:41.505376 v:36.853477 average:28.990890 min:22.219454 max:52.509271
$ ffmpeg -i x.ivf -f rawvideo x.yuv
$ ffmpeg -f rawvideo -vcodec rawvideo -video_size 352x240 -framerate 29.97 -i x.yuv -i tennis_sif.y4m -lavfi psnr -f null -
[..]
[Parsed_psnr_0 @ 0x7fadf9e013a0] PSNR y:43.270594 u:46.300362 v:47.011172 average:44.097994 min:43.460704 max:52.509271

Change-Id: Ifac2d6c2ff8379b2d318fe5cfe4be0bf1bc9f27f

1 files changed, 2 insertions, 0 deletions

diff --git a/vpxenc.c b/vpxenc.c
index db8fcafa1..8798e6918 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -2074,6 +2074,8 @@ int main(int argc, const char **argv_) {
     if (!global.have_framerate) {
       global.framerate.num = input.framerate.numerator;
       global.framerate.den = input.framerate.denominator;
+      FOREACH_STREAM(stream->config.cfg.g_timebase.den = global.framerate.num;
+                     stream->config.cfg.g_timebase.num = global.framerate.den);
     }
 
     FOREACH_STREAM(set_default_kf_interval(stream, &global));