Hi Matt > >I think I must be doing something silly: every time I try to pipe the > Excellent intuition... :)
Gee, thanks. > >output of either png2yuv or ppmtoy4m into mpeg2enc, mpeg2enc complains: > > ERROR: [mpeg2enc] Could not read YUV4MPEG header: bad stream or frame > > header! > > > >Command lines: > > png2yuv -f 25 -I b -n 1 -L 1 -j foo.png | \ > > mpeg2enc -f 8 -o output.mpg silence.m2a > > mpeg2enc != mplex Yes, of course, how silly of me. Thanks for that - I couldn't see the wood for the trees. The fact that I haven't gotten to bed before 2am for the past week probably wasn't helping. A fresh pair of eyes always helps in cases like this. > Since you supplied an _input filename_ to mpeg2enc, it is trying > to read a YUV4MPEG2 stream from "silence.m2a", and that is failing > (because, I assume, it is an MPEG audio stream). Yep on both counts. It's all completely and abundantly consistent and clear, as it should have been to me last night. I need more sleep. :) > ps: My own intuition says that your input PNG image doesn't actually > have a 59:54 sample aspect ratio, i.e. you'll need y4mscaler in > the pipeline. For the purposes of this particular exercise I don't need to do the SAR scaling. That is, its omission in this case is deliberate. Thanks again jonathan ------------------------------------------------------- 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
