Hello,
We are integrated with Wowza 4.8.23+2 to produce streamable DASH streams from MP4 sources and recently we encountered an MP4 file that was not showing as expected.
The video is expected to show with aspect ratio 16:9 but it’s actually showing in 3:2.
Analysing the media with MediaInfo, we can see that the aspect ratio is defined as 16:9 and the confusion probably comes from the fact that the WidthxHeight are 720x480 (ratio 3:2).
In the DASH manifest returned by Wowza, we see:
<AdaptationSet id=“0” group=“1” mimeType=“video/mp4” width=“720” height=“480” par=“3:2” frameRate=“30000/1001” segmentAlignment=“true” startWithSAP=“1” subsegmentAlignment=“true” subsegmentStartsWithSAP=“1”>
<SegmentTemplate presentationTimeOffset=“0” timescale=“90000” media=“segment_ctvideo_rid$RepresentationID$_cs$Time$_w117425203_mpd.m4s” initialization=“segment_ctvideo_rid$RepresentationID$_cinit_w117425203_mpd.m4s”>
<SegmentTimeline>
<S t=“0” d=“900900”/>
<S d=“900900” r=“11”/>
<S d=“345870”/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id=“p0va0br1022582” codecs=“avc1.4d001f” sar=“1:1” bandwidth=“1022582” />
</AdaptationSet>
We would expect to see par=“16:9” (display aspect ratio) and sar=“32:27” (pixel aspect ratio).
Is there a way to configure Wowza so it would compute the par and sar values differently?
Do you consider the current values as a bug?
Thank you