<html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> Hi, I don't know where to start to resolve this problem and guessed maybe this is a good place to start. If not, please point me in the right direction. Our ultimate goal is to stream 8k resolution video using sage (see <a class="moz-txt-link-abbreviated" href="http://www.sagecommons.org">www.sagecommons.org</a>). - We first used ffmpeg to convert a 4k resolution video file to yuv format, and we were able to view it with ffplay, mplayer, and crcview (an in house program). - We then used ffmpeg to convert/resample the same 4k resolution video file to yuv/8k resolution; the conversion completed without error. - When trying to view the resulting yuv/8k resolution file all three viewer programs failed with the same X Error. For example, here is the output from ffplay: <blockquote>ffplay -i Lupe.8k.yuv -s 8192x4320 -pix_fmt yuv420p -x 1920 -y 1080 ffplay version 0.8, Copyright (c) 2003-2011 the FFmpeg developers built on Nov 30 2011 13:01:22 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] configuration: libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 2. 0. 0 / 2. 0. 0 [rawvideo @ 0x129d740] Estimating duration from bitrate, this may be inaccurate Input #0, rawvideo, from 'Lupe.8k.yuv': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0.0: Video: rawvideo, yuv420p, 8192x4320, 25 tbr, 25 tbn, 25 tbc X Error of failed request: BadLength (poly request too large or internal Xlib length error) Major opcode of failed request: 132 (XVideo) Minor opcode of failed request: 18 () Serial number of failed request: 23 Current serial number in output stream: 24 </blockquote> In case it matters, we are using openSuse 11.4 64 bit linux, on an ASUS P6T7 WS Supercomputer motherboard, with 12 G RAM, and a ASUS GTX590 video card. My guess is the 8k resolution video format is exceeding a buffer size limit somewhere, either in software, or maybe on the video card. Is there a way to find out what buffers are affected and is there a way to overcome these limits? Thanks for any assistance you can provide, Don </body> </html>