Record: video recording issues on xo-4 os4

[godiard]

Trying to record a video on Record activity, the recorded area is smaller than the preview image (like a digital zoom). If select quality high, is recorded only a black box.

In the log we see:

basetransform gstbasetransform.c:1642 gst_base_transform_prepare_output_buffer:<videoscale0> Caps did not change but allocated size does not match expected size (735000 != 614400)

[walter]

I created a gst.bin in which I set a few additional playback parameters (the same ones that I use in Turtle Art) and it seems to fix the problem. See attachment.

[dsd]

Thanks for looking at this. Unfortuntely that patch introduces a software rescaling of the image, something that should work in hardware. I will investigate the underlying gstreamer error in the next few days.

[dsd]

Replying to godiard:

Trying to record a video on Record activity, the recorded area is smaller than the preview image (like a digital zoom).

This only happens on XO-4s with the ov7670 sensor, which is probably not the common configuration. Anyway, fixed in olpc-kernel f0a3916

[dsd]

test case

[dsd]

For the playback issue with the high res videos, the underlying driver problem can be seen with the attached test case: gst-launch playbin uri=testhigh.ogg

This makes XO-4's libgalcore unhappy because the YUV image planes are not aligned to 64-byte boundaries in the resultant XvImages created at playback time.

[dsd]

Well this is quite a painful situation: ​http://dev.laptop.org/ticket/12693

For now I have tweaked the resolution to produce 64-byte-aligned image data, which also moves us to a much more standard res (384x288). Fixed in Record-99.

[walter]

Shall we open a separate ticket for the zooming problem with low-resolution capture?

[dnarvaez]

Milestone 0.98 deleted