VSE doesn't render lagarith lossless codec correct #42385

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mic lack30 · 2014-10-25T00:30:50+02:00

mic lack30 commented

2014-10-25 00:30:50 +02:00

Win 7 x64, 2x GTX680;

blender-2.72-cdf5370-win64

I record my videos with Dxtory(I use the lagarith lossless codec) and edit them in Blenders VSE. In the preview window while editing it, everything works correctly, but as soon as I press render, it's like someone plays it at 200 times speed. When I playback the Video, only the first half of the video contains frames from my original one and the rest is black. I only hear the audio in the half with the black frames. I already did video editing with this screen recorder this codec and there it worked.(routhly version 2.69)

https://www.dropbox.com/s/c9w2sglyy0jtwhe/Bug.zip?dl=0

Open the .blend
Press Strg+F12
Look at the rendered Video

Win 7 x64, 2x GTX680; blender-2.72-cdf5370-win64 I record my videos with Dxtory(I use the lagarith lossless codec) and edit them in Blenders VSE. In the preview window while editing it, everything works correctly, but as soon as I press render, it's like someone plays it at 200 times speed. When I playback the Video, only the first half of the video contains frames from my original one and the rest is black. I only hear the audio in the half with the black frames. I already did video editing with this screen recorder this codec and there it worked.(routhly version 2.69) https://www.dropbox.com/s/c9w2sglyy0jtwhe/Bug.zip?dl=0 Open the .blend Press Strg+F12 Look at the rendered Video

mic lack30 commented

2014-10-25 00:30:50 +02:00

Changed status to: 'Open'

mic lack30 commented

2014-10-25 00:30:50 +02:00

Added subscriber: @michaellackner

Sergey Sharybin was assigned by Bastien Montagne

2014-10-26 12:47:28 +01:00

Bastien Montagne commented

2014-10-26 12:47:28 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2014-10-26 12:47:28 +01:00

Sergey, this probably has to do with ffmpeg?

mic lack30 commented

2014-10-26 13:24:59 +01:00

I just did a few more testings to help you out. I recorded a new video with HyperCam 2 and the lossless codec. There it worked. I asume it's how txdory writes the video. Maybe there are some kind of "null frames". Frames where there is no change are symply remapped???Maybe??

Bastien Montagne commented

2014-10-27 08:24:31 +01:00

I will let Sergey make final decision here, but imho you should just use some kind of 'official' tool to export your files as images sequences (as PNGs, or EXR if you need/have float data), and use those in Blender.

In general, complex video file formats are not that well handled in Blender - it's not a video editing, so we cannot spent weeks and weeks to tweak ffmpeg usage until it's able to read and edit any possible format (especially rather exotic ones). ;)

I will let Sergey make final decision here, but imho you should just use some kind of 'official' tool to export your files as images sequences (as PNGs, or EXR if you need/have float data), and use those in Blender. In general, complex video file formats are not that well handled in Blender - it's not a video editing, so we cannot spent weeks and weeks to tweak ffmpeg usage until it's able to read **and** edit any possible format (especially rather exotic ones). ;)

mic lack30 commented

2014-10-27 15:18:12 +01:00

(For me it sounds like you think I wanna export with this codec. I record with the lagarith codec, edit it in Blender and export a H264 with mp4 codec. Just in case you misunderstood me)
The thing is it worked already. I'm just not sure what happened in the meantime. I tried old Blender Versions as well as an older Txdory version. Didn't change the fact that it doesn't work.

(For me it sounds like you think I wanna export with this codec. I record with the lagarith codec, edit it in Blender and export a H264 with mp4 codec. Just in case you misunderstood me) The thing is it worked already. I'm just not sure what happened in the meantime. I tried old Blender Versions as well as an older Txdory version. Didn't change the fact that it doesn't work.

Sergey Sharybin commented

2014-10-31 15:13:20 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2014-10-31 15:13:20 +01:00

Sergey Sharybin commented

2014-10-31 15:13:20 +01:00

This is a known issue with videos coming from third party software which tends to put keyframes wrong, or even corrupting the video header screwing the scrubbing. Generating timecode (i.e. Record Run) helps a lot in such cases. For now you can do it manually, making it more automatic is in our TODO.

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VSE doesn't render lagarith lossless codec correct #42385