>As soon as I get rid of -I active, the thing is going very well .... :-( ?? >Am I using bad values ???
Nope, the values are fine, but they are triggering a bug. (I remember this problem arising before, somewhere, but I don't remember what the resolution was.) ... > INFO: [y4mscaler] === SOURCE parameters: ================= > INFO: [y4mscaler] < stream: > INFO: [y4mscaler] < 1280x960, SAR 1:1, progressive > INFO: [y4mscaler] < chroma subsampling: 420_MPEG2 > INFO: [y4mscaler] < chroma ss ratios: x 1:2 y 1:2 The clues are here: > INFO: [y4mscaler] < active region: > INFO: [y4mscaler] < 0.765387x2.637279 at 80.404124,43.104995 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > INFO: [y4mscaler] < matte region: > INFO: [y4mscaler] < 1280x960 at 0,0 (bg Y'CbCr: 16,128,128) > INFO: [y4mscaler] === SCALING parameters: ================ > INFO: [y4mscaler] | Scaler: Matto's Generic Scaler > INFO: [y4mscaler] | kernels: sinc:5, sinc:5 > INFO: [y4mscaler] === TARGET parameters: ================= > INFO: [y4mscaler] > stream: > INFO: [y4mscaler] > 720x576, SAR 59:54, progressive > INFO: [y4mscaler] < chroma subsampling: 420_JPEG > INFO: [y4mscaler] < chroma ss ratios: x 1:2 y 1:2 > INFO: [y4mscaler] > active region: > INFO: [y4mscaler] > -6x576 at 6,0 (bg Y'CbCr: 16,128,128) and here: > INFO: [y4mscaler] > X ratio: 15181/24298 > INFO: [y4mscaler] > Y ratio: 895679/1312092 ... The bug is that ratios are represented as a pair of 32-bit ints, and the larger-than-usual numbers here (big frames) are causing the ratio calculations to overflow. As a work-around for right now, if you change the active region size to something with more small factors, e.g. 1180x850, you'll avoid the overflow and the size/scale-factors will look much more reasonable, like this: INFO: [y4mscaler] === SOURCE parameters: ================= INFO: [y4mscaler] < stream: INFO: [y4mscaler] < 1280x960, SAR 1:1, progressive INFO: [y4mscaler] < chroma subsampling: luma plane only INFO: [y4mscaler] < chroma ss ratios: x 1:1 y 1:1 INFO: [y4mscaler] < active region: INFO: [y4mscaler] < 1180.000000x848.953704 at 78.000000,40.546296 INFO: [y4mscaler] < matte region: INFO: [y4mscaler] < 1280x960 at 0,0 (bg Y'CbCr: 16,128,128) INFO: [y4mscaler] === SCALING parameters: ================ INFO: [y4mscaler] | Scaler: Matto's Generic Scaler INFO: [y4mscaler] | kernels: cubicK4, cubicK4 INFO: [y4mscaler] === TARGET parameters: ================= INFO: [y4mscaler] > stream: INFO: [y4mscaler] > 720x576, SAR 59:54, progressive INFO: [y4mscaler] < chroma subsampling: luma plane only INFO: [y4mscaler] < chroma ss ratios: x 1:1 y 1:1 INFO: [y4mscaler] > active region: INFO: [y4mscaler] > 720x566 at 0,5 (bg Y'CbCr: 16,128,128) INFO: [y4mscaler] > X ratio: 36/59 INFO: [y4mscaler] > Y ratio: 2/3 INFO: [y4mscaler] Output Stream Header: INFO: [y4mscaler] >>> frame size: 720x576 pixels (414720 bytes) INFO: [y4mscaler] >>> chroma: luma plane only INFO: [y4mscaler] >>> frame rate: 30000/1001 fps (~29.970030) INFO: [y4mscaler] >>> interlace: none/progressive INFO: [y4mscaler] >>> sample aspect ratio: 59:54 -matt m. ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users