I've just started my first project.When i click the play button in project, to view my edits, it takes about 15 minutes for the playback to start.
When i periodically save my project, this takes an age too.
Can anyone help.Thank you.
Very slow project playback
Moderator: Ken Berry
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THoff
Re: Very slow project playback
Not without at least some information about your system and what you are doing.Duff wrote:Can anyone help.
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Duff
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THoff
Is it the saving of the project that takes forever, or rendering the video file? Saving the project to a .VSP file should take only a second or so, since it just contains a list of the assets in your project, what transitions to use etc.
If you are using High Quality Playback instead of Instant Playback, then your project must be rendered first using all the settings that would be used for a final render. This can take considerable time, especially if transcoding (conversion) or resizing is required.
Try switching to Instant Playback, and see if that helps. Also, keep an eye on memory usage using Task Manager, and possibly exclude the directories used by your video files from AV scanning if applicable.
If you are using High Quality Playback instead of Instant Playback, then your project must be rendered first using all the settings that would be used for a final render. This can take considerable time, especially if transcoding (conversion) or resizing is required.
Try switching to Instant Playback, and see if that helps. Also, keep an eye on memory usage using Task Manager, and possibly exclude the directories used by your video files from AV scanning if applicable.
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Duff
Hi again,i have got it on Instant playback.This problem is when i want to replay the video that im working on. I click on the timeline where i want to start playback and press play.It takes about 10 minutes to start playing.
I have read in the user guide to save your work as you go along.When i do this it takes about 10 minutes too.
It has been very frustrating using this software. I choose to use it over Pinnacle software as it was recommended to me.
I make sure that my internet connection, anti virus, firewall and system monitors are shut down before i start editing.
I think my computer should be up to the task.
Thank you for assistance.
I have read in the user guide to save your work as you go along.When i do this it takes about 10 minutes too.
It has been very frustrating using this software. I choose to use it over Pinnacle software as it was recommended to me.
I make sure that my internet connection, anti virus, firewall and system monitors are shut down before i start editing.
I think my computer should be up to the task.
Thank you for assistance.
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THoff
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Duff
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THoff
An AVI file is a container for audio and sound, both of which can (and usually are) compressed using an encoder/decoder (codec). Knowing which codec and what compression settings were used are crucial -- right-click on the video clip, and select Properties to see them.
Keyframes are frames that encode a whole picture. Non-keyframes or partial frames only encode the changes from the last keyframe, so if you film a person walking left to right in front of a wall, the only information in the partial frame would be the person and a small area surrounding it.
Partial frames are a tradeoff between storage efficiency and speed. When you try to seek through a video using partial frames, unless you are trying to jump to a keyframe, you will have to locate the last keyframe prior to the jump location, and then play back all of the partial frames to construct the video image that would be shown at the location you are seeking to.
Some video files intended for streaming over the Internet have a single keyframe at the beginning of the video, and then only partial frames. This is because people rarely seek in these videos, and because bandwidth is at a premium.
Keyframes are frames that encode a whole picture. Non-keyframes or partial frames only encode the changes from the last keyframe, so if you film a person walking left to right in front of a wall, the only information in the partial frame would be the person and a small area surrounding it.
Partial frames are a tradeoff between storage efficiency and speed. When you try to seek through a video using partial frames, unless you are trying to jump to a keyframe, you will have to locate the last keyframe prior to the jump location, and then play back all of the partial frames to construct the video image that would be shown at the location you are seeking to.
Some video files intended for streaming over the Internet have a single keyframe at the beginning of the video, and then only partial frames. This is because people rarely seek in these videos, and because bandwidth is at a premium.
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Duff
These are the properties
File Format- Microsoft AVI files -open DML
File size- 173,826 Kbytes
Frame rate - 25000 frames/sec
Data rate - 3640.62 kbps
Video
Compression- DV Video encoder type 2
Attributes - 24 bits, 720 x 576, 4:3
Total frames 1,193
Audio
Compression - PCM
Attributes - 32000Khz 16 bit stereo
Total samples - 1,526,997
I hope this is of some use.
File Format- Microsoft AVI files -open DML
File size- 173,826 Kbytes
Frame rate - 25000 frames/sec
Data rate - 3640.62 kbps
Video
Compression- DV Video encoder type 2
Attributes - 24 bits, 720 x 576, 4:3
Total frames 1,193
Audio
Compression - PCM
Attributes - 32000Khz 16 bit stereo
Total samples - 1,526,997
I hope this is of some use.
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THoff
Try changing from DV Type 2 to DV Type 1. The only difference between Type 1 and Type 2 is how the audio is included in the file -- a Type 1 file contains the video and audio in an interleaved format, while Type 2 includes separate audio and video streams. The long delay you are experiencing maybe related to having to seek within separate streams.