Transcoding quality.

Wowza Streaming Engine
1

Hi,

I’ve started transcoding with wowza. Mpeg 2 to h.264. Source resolution is 1024x 576. But it appears that it transcodes with a poor quality. Profile is main.

<Encode>
				<Enable>true</Enable>
				<Name>720p</Name>
				<StreamName>mp4:${SourceStreamName}</StreamName>
				<Video>
					<Codec>H.264</Codec>
					<Transcoder>CUDA</Transcoder>
					<FrameSize>
						<FitMode>match-source</FitMode>
					</FrameSize>
					<Profile>main</Profile>
					<Bitrate>1300000</Bitrate>
					<KeyFrameInterval>
						<FollowSource>false</FollowSource>
						<Interval>60</Interval>
					</KeyFrameInterval>
					<Parameters>
					</Parameters>
				</Video>
				<Audio>
					<Codec>AAC</Codec>
					<Bitrate>96000</Bitrate>
				</Audio>
				<Properties>
				</Properties>
			</Encode>

Using VLC I’m able to transcode with much better quality. I’m using H264:High:Level 5.1 as encoding parameters in VLC.

What am I supposed to do to increase quality using encoding parameters?

2

I would try setting KeyFrameInterval back to “false”.

Also, as a trouble-shooting step, for comparison, try changing Transcoder back to “default”.

Richard