Problem using Rate controls
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Problem using Rate controls
Hi,
I have been trying to slow down some video that I need to annotate using the Rate controls, however increasing or decreasing the rate does not change the speed at which the video plays back. I was wondering if anyone could help me solve this problem.
Using
ELAN Version: 4.1.2
OS: Windows 7
Media format: WMV
Media Framework Selected: I tried all of the options
In addition, i'm not sure if ELAN has this capability, but I would like to annotate multiple independent tiers simultaneously; however, when i active selection mode the same segment of time is selected for all the tiers. Is it possible to have a independent selection mode for each independent tier, so the selected segment length could be different for each tier with the end time as the current frame. That would help annotate different time segments for each tier, without having to go back and forth. I guess this is asking a lot from the software, but i guess there is no harm in asking.
Thanks in advance for your help and support.
-M
Re: Problem using Rate controls
Changing the playback rate of a wmv file doesn't seem to be supported by the default codecs for that format. When you right click on the video and select "Show Filter Graph" you get output similar to this:
Filter 1: Video Renderer
Pin 1: VMR Input0
Filter 2: Default DirectSound Device
Pin 1: Audio Input pin (rendered)
Filter 3: WMVideo Decoder DMO
Pin 1: in0
Pin 2: out0
Filter 4: WMSpeech Decoder DMO
Pin 1: in0
Pin 2: out0
Filter 5: file:///E:/try.wmv
Pin 1: Raw Audio 0
Pin 2: Raw Video 1
Apparently these decoders don't support changing the rate. Unless you find another codec that does support different playback rates, it will not work.
About the idea of separate selection modes per independent tier: indeed, there is no harm in asking but this would mean a major change in the whole setup of the selection mechanism in ELAN. Apart from the amount of work, it isn't really clear to me how it is supposed to work. E.g. dragging with the mouse and then have different start times per tier but the same end time: that will be difficult to accomplish. Same with the selection mode in combination with the media control buttons.
-Han
Release of ELAN 4.3.0
