# Transcoder / Multiple Streams

**URL:** <https://community.wowza.com/t/transcoder-multiple-streams/43282>\
**Category:** Wowza Streaming Engine\
**Created:** [June 26, 2014, 5:00am UTC](https://community.wowza.com/t/transcoder-multiple-streams/43282 "2014-06-26T05:00:58Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![andreas\_ehringfeld](https://avatars.discourse-cdn.com/v4/letter/a/47e85d/32.png) [@andreas\_ehringfeld](https://community.wowza.com/u/andreas_ehringfeld)\
**Post date:** [June 26, 2014, 5:00am UTC](https://community.wowza.com/t/transcoder-multiple-streams/43282/1 "2014-06-26T05:00:58Z")

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Dear wowza support team

I am just trying out wowza trial edition…

- I created multiple streams with VLC

- for every input stream I created a stream file in wowza

- I activated transcoder addon and set the fallback template to transcode

when connecting streams, only one stream (the first I connect) is transcoded. is it possible to extend the trial version for more channels?

secondly I experiece a background noise - some kind of scale - when connecting with a player (built in wowza player as well as e.g. vlc). what could be the cause of that?

ah, just found: [https://www.wowza.com/forums/showthread.php?19075-Publish-Converted-AAC-live-stream-problem](https://www.wowza.com/forums/showthread.php?19075-Publish-Converted-AAC-live-stream-problem)

could it be due to trial edition?

- do you recommend/support any specific hardward (grapic cards) for transcoding?

- last but not least: if the input stream contains multiple streams with differen “program ids” does the transcoder only transcodes the first/one? so the only solution is to split the input streams?

thanks!

regards

andre

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**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\
**Post date:** [June 26, 2014, 2:45pm UTC](https://community.wowza.com/t/transcoder-multiple-streams/43282/2 "2014-06-26T14:45:09Z")

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Hi,

The trial edition license is limited to transcoding a single stream (channel) at any one time.

When using a trial license the transcoded streams (renditions) also have an audio and video watermark which can’t be removed.

The audio and video watermark is not present in the renditions created using a subscription or perpetual license.

Please see the following article to see the supported graphics cards for transcoding

[Server specifications for NVIDIA NVENC and NVIDIA CUDA acceleration with Wowza Transcoder AddOn](https://www.wowza.com/docs/server-specifications-for-nvidia-nvenc-and-nvidia-cuda-acceleration-with-wowza-transcoder)

You can select the program Id in the .stream file you’re using to get the stream to Wowza.

[How to specify per-stream settings in .stream files](https://www.wowza.com/docs/how-to-specify-per-stream-settings-in-stream-files)

Regards,

Jason

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [July 7, 2014, 1:56pm UTC](https://community.wowza.com/t/transcoder-multiple-streams/43282/3 "2014-07-07T13:56:00Z")

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andreas,

Yes, that is correct, because the Transcoder only transcodes one audio and one video track.

Richard

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**Author:** ![andreas\_ehringfeld](https://avatars.discourse-cdn.com/v4/letter/a/47e85d/32.png) [@andreas\_ehringfeld](https://community.wowza.com/u/andreas_ehringfeld)\
**Post date:** [July 2, 2014, 1:08pm UTC](https://community.wowza.com/t/transcoder-multiple-streams/43282/4 "2014-07-02T13:08:14Z")

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Dear wowza team

first of all - great thanks for your support! your support is great…

I need to transcode and stream about 20 programs; the input are two channels that include all programs with different program ids.

for license of transcode addon: as far as I understand I have to demux the 20 tv programs and have to pay for 20 channels as wowza does only transcode one program id within a channel (otherwise if wowza transcoding would transcode all program ids within a input channel I have to pay for two channels)

is it correct that I have to pay the transcode addon for 20 channels?

btw, plz note that the web based contact form does not work - I get a http error

regards

andreas