transcoding: fix encoder time_base again

diff --git a/src/plumbing/transcoding.c b/src/plumbing/transcoding.c
index 2d2667a30cd00ad784e8a358288faa51d349fe0b..f6fe1ab2f2d9b5c6069abca41697f453bb124c1f 100644 (file)
--- a/src/plumbing/transcoding.c
+++ b/src/plumbing/transcoding.c
@@ -1027,10 +1027,17 @@ transcoder_stream_video(transcoder_t *t, transcoder_stream_t *ts, th_pkt_t *pkt)
     octx->width           = vs->vid_width  ? vs->vid_width  : ictx->width;
     octx->height          = vs->vid_height ? vs->vid_height : ictx->height;
     octx->gop_size        = 25;
-    octx->time_base.den   = ictx->time_base.den;
-    octx->time_base.num   = ictx->time_base.num;
     octx->has_b_frames    = ictx->has_b_frames;
 
+    // Encoder uses "time_base" for bitrate calculation, but "time_base" from decoder
+    // will be deprecated in the future, therefore calculate "time_base" from "framerate" if available.
+    octx->ticks_per_frame = ictx->ticks_per_frame;
+    if (ictx->framerate.num != 0 && ictx->framerate.den != 0) {
+      octx->time_base     = av_inv_q(av_mul_q(ictx->framerate, av_make_q(ictx->ticks_per_frame, 1)));
+    } else {
+      octx->time_base     = ictx->time_base;
+    }
+
     switch (ts->ts_type) {
     case SCT_MPEG2VIDEO:
       octx->codec_id       = AV_CODEC_ID_MPEG2VIDEO;