Jump to content
Dataton Forum
JOAN BORREGO

operating system error -2147220927

Recommended Posts

Hello, 

Im trying to play one clip of video that is mp4, with codec h264, and on the production pc its working but on display computer it doesn´t work. In addition on the message window  it´s showing an error, please find attached

Im working with 6.4 version and W7.

I can play this clip at display pc manually, but through watchout i can´t.

I can try to recodify file to hap codec, but in theory h264 must work, and there are a lot of costumers bring me normally this kind of files.

Anybody knows what are the reason and possible solution for this issue.

 

Thanks in advance

20190515_130101.jpg

Share this post


Link to post
Share on other sites
On 5/15/2019 at 3:09 PM, JOAN BORREGO said:

Hello, 

Im trying to play one clip of video that is mp4, with codec h264, and on the production pc its working but on display computer it doesn´t work. In addition on the message window  it´s showing an error, please find attached

Im working with 6.4 version and W7.

I can play this clip at display pc manually, but through watchout i can´t.

I can try to recodify file to hap codec, but in theory h264 must work, and there are a lot of costumers bring me normally this kind of files.

Anybody knows what are the reason and possible solution for this issue.

 

Thanks in advance

20190515_130101.jpg

I Have also the same problem Can anybody help us out

 

Share this post


Link to post
Share on other sites

I've seen H.264 files failing before and the reason was an unsupported encoding level.

This could be your problem as well. Dataton has only limited options to cure this since it is a problem of the third party decoder used in the program.

You can check this with software like MediaInfo or VideoSpec (both OS-X) or similar programs you might find for Windows OS.

 

On 12/12/2017 at 11:38 PM, Miro said:

H264 level limitation in WATCHOUT 6.2

Hi, the updated H264 decoder in WATCHOUT 6.2 has a level 5.2 limitation. It’s a third-party codec not developed by Dataton so this limitation is outside of our control. The codec update was necessary to eliminate important bugs. This level limitation shouldn’t really be a big problem for most users since most video editing tools have the same level 5.2 limitation in their encoder. In more extreme scenarios where huge and odd resolutions are required this may be a problem but there are workarounds!

 

Each level in H.264 is basically a combination of constraints like the maximum number of luma samples per second and the maximum number of macroblocks per second. The number of luma samples equals the number pixels and a macroblock is 16x16 pixels.

 

In level 5.2 the maximum number of pixels per second equals 530 841 600. For example:

  • A DCI 4k footage at 60 frames per second: 4096 x 2160 x 60 = 530 841 600 luma samples/s which is exactly at the limit.
  • A super wide video for a custom LED wall at 60 Hz: 8192 x 1024 x 60 = 503 316 480 luma samples/s is slightly below the limit.

Videos with a higher luma count will be encoded using a higher level then 5.2 and will not be rendered in WATCHOUT 6.2!

The easiest workaround would be to export the video as HAP or HAPQ but in some cases the large file size of HAPs causes problems when it comes to distribution of the files from a remote producer over internet.

 

Some encoders like x264 can be forced to use a certain level despite of the luma count. You will get a bunch of warnings, but it doesn’t stop the encoding process. In WATCHOUT the decoder checks only the level of the video and if it’s lower or equal then 5.2 it will play even if it’s an 8k60 video.

For example, you can use ffmpeg to transcode an 8k (7680 x 4320@60fps) video with a forced level:

 

ffmpeg -i input.mp4 -c:v libx264 -refs 2 -level 5.2 -profile:v high -pix_fmt yuv420p -g 30 -bf 0 -b:v 200M output.mp4

 

And this video will play successfully in WATCHOUT if your CPU is powerful enough.  ;)

 

//Miro

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...