# wowza quicksync transcode video

**URL:** <https://community.wowza.com/t/wowza-quicksync-transcode-video/45293>\
**Category:** Wowza Streaming Engine\
**Created:** [July 26, 2015, 12:02am UTC](https://community.wowza.com/t/wowza-quicksync-transcode-video/45293 "2015-07-26T00:02:24Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![zheng\_leo](https://avatars.discourse-cdn.com/v4/letter/z/c67d28/32.png) [@zheng\_leo](https://community.wowza.com/u/zheng_leo)\
**Post date:** [July 26, 2015, 12:02am UTC](https://community.wowza.com/t/wowza-quicksync-transcode-video/45293/1 "2015-07-26T00:02:24Z")

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Hi there,

I’m using QuickSync transcode in my workflow, it has a picture quality issue when i playback the output live stream. it would have a mosaic picture especially when scene changes or fast motion picture. when scene change happend, the picture will become blur and then it will turn into clear progressively.

CPU: intel corel I7-3770

Input: 8Mbps or 17Mbps 1080i/720i mpegts stream(mpeg2+ac3)

(now transcode 3 input stream, cpu utilization percentage is 35%, GPU around 15%, memory take 8GB of 12GB)

Transcode para:

[HTML]

hd

true

flv:${SourceStreamName}\_hd

H.264

QuickSync

-1

main

1500000

true

0

letterbox

1280

720

0,0,0,0

[/HTML]

Any idea to slove this problem?

Thanks very much!

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<div class="post-metadata">

**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [July 31, 2015, 11:38pm UTC](https://community.wowza.com/t/wowza-quicksync-transcode-video/45293/2 "2015-07-31T23:38:15Z")

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Hi,

Do you see the same issue if you try using the default transcoding, as opposed to QuickSync transcoding?

default

This will, at least, help eliminate a particular issue that Wowza Streaming Engine may be having with the source stream.

Best regards,

Daren

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<div class="post-metadata">

**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [August 4, 2015, 4:06pm UTC](https://community.wowza.com/t/wowza-quicksync-transcode-video/45293/3 "2015-08-04T16:06:24Z")

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Hi,

This is being handled in ticket #136543

Daren

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<div class="post-metadata">

**Author:** ![zheng\_leo](https://avatars.discourse-cdn.com/v4/letter/z/c67d28/32.png) [@zheng\_leo](https://community.wowza.com/u/zheng_leo)\
**Post date:** [August 3, 2015, 1:34am UTC](https://community.wowza.com/t/wowza-quicksync-transcode-video/45293/4 "2015-08-03T01:34:02Z")

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Hi, thanks for the reply

The dufault transcoding is much better, i had making a copy of this two different output videos and shared in dropbox, you might check it

Dropbox

default-transcoding: [https://www.dropbox.com/s/kocpj6w0zcf0cz2/default.ts?dl=0](https://www.dropbox.com/s/kocpj6w0zcf0cz2/default.ts?dl=0)

quicksync-transcoding: [https://www.dropbox.com/s/s9b0xxnzxffzw4p/quicksync.ts?dl=0](https://www.dropbox.com/s/s9b0xxnzxffzw4p/quicksync.ts?dl=0)

you can find a obvious difference at the time 9th second.

so any suggestions about this?

thanks!