# Trickplay Fast Forward, Slow Down H264/AAC MP4

**URL:** <https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672>\
**Category:** Wowza Streaming Engine\
**Created:** [April 23, 2014, 2:05pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672 "2014-04-23T14:05:39Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Sam\_Shmayev](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@Sam\_Shmayev](https://community.wowza.com/u/Sam_Shmayev)\
**Post date:** [April 23, 2014, 2:05pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/1 "2014-04-23T14:05:39Z")

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Hi,

Is it possible to implement trickplay for H264/AAC, MP4 container?

[http://flash.flowplayer.org/demos/plugins/streaming/slowmotion.html](http://flash.flowplayer.org/demos/plugins/streaming/slowmotion.html)

Any ideas appreciated,

Thanks

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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:** [April 23, 2014, 1:13pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/2 "2014-04-23T13:13:00Z")

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I think slow motion works with h.264, but otherwise trick play is not supported in Wowza with h.264 content. It works with VP6 or Spark video.

Richard

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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:** [April 23, 2014, 3:56pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/3 "2014-04-23T15:56:58Z")

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I don’t have a low-level explanation, but I know that is the limitation: You need vp6 or Spark video, and RTMP player, for full trick player features with Wowza.

You might be able to do trick play in a Silverlight player (smooth streaming) or OSMF player (sanjose/HDS streaming). There are trick play features in the Silverlight smooth streaming API, though they didn’t work for me when I was working with that a couple of years ago, and we don’t have any examples.

Richard

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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:** [April 24, 2014, 1:53pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/4 "2014-04-24T13:53:19Z")

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Hi Sam,

For HTTP streaming clients, trick play is all done in the client, if it is supported; Wowza is not involved except to deliver the chunks. For RTMP playback clients streaming VP6 or Spark video, Wowza is involved in trick play. FFmpeg or GStreamer are sources, and not involved in trick play in either case.

Richard

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**Author:** ![Sam\_Shmayev](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@Sam\_Shmayev](https://community.wowza.com/u/Sam_Shmayev)\
**Post date:** [April 23, 2014, 5:35pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/5 "2014-04-23T17:35:16Z")

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Could you please explain, why it’s so difficult?

Thanks.

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**Author:** ![Sam\_Shmayev](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@Sam\_Shmayev](https://community.wowza.com/u/Sam_Shmayev)\
**Post date:** [April 24, 2014, 3:41pm UTC](https://community.wowza.com/t/trickplay-fast-forward-slow-down-h264-aac-mp4/39672/6 "2014-04-24T15:41:55Z")

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Richard,

May be you have some ideas how to implement this with FFMPEG/GSTREAMER pipelines?