Fix encoding time_base factor

A few fixes regarding the topic:
- time_base should be set to codec
- consider the fact that time_base of streams can be changed in ffmpeg
- set time_base to frames (some codecs want it to be set explicitly)

The patch fixes the crash on recording WMV video.

Pick-to: 6.5
Change-Id: Ibb40a0fef96eadafdf8723d9f11e9eabacc1325f
Reviewed-by: Lars Knoll <lars@knoll.priv.no>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/plugins/multimedia/ffmpeg/qffmpegvideoframeencoder_p.h b/src/plugins/multimedia/ffmpeg/qffmpegvideoframeencoder_p.h
index 62eb6f916..8e8b99b1f 100644
--- a/src/plugins/multimedia/ffmpeg/qffmpegvideoframeencoder_p.h
+++ b/src/plugins/multimedia/ffmpeg/qffmpegvideoframeencoder_p.h
@@ -62,7 +62,9 @@ public:
     AVPixelFormat sourceFormat() const { return d ? d->sourceFormat : AV_PIX_FMT_NONE; }
     AVPixelFormat targetFormat() const { return d ? d->targetFormat : AV_PIX_FMT_NONE; }
 
-    qint64 getPts(qint64 ms);
+    qint64 getPts(qint64 ms) const;
+
+    const AVRational &getTimeBase() const;
 
     int sendFrame(AVFrameUPtr frame);
     AVPacket *retrievePacket();