<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000000">     Hi all.     I am trying to generate an AVI file with this pipeline: gst-launch-0.10 videotestsrc is-live=true ! \ 'video/x-raw-yuv,format=(fourcc)I420,width=640,height=480,framerate=(fraction)25/1' ! \ x264enc ! h264parse ! queue ! mux. \ audiotestsrc is-live=true ! audioconvert ! \                                                >> optional 'audio/x-raw-int,rate=44100,channels=2' ! lame ! queue ! mux. \             >> optional avimux name=mux ! filesink location=test.avi The file that I get can be played using ffplay (for instance), but it can not be played using VLC or Windows Media Player. In the case of VLC, this error appears: [00000418] avi demux error: avi module discarded (invalid file) [00000418] avformat demux error: av_open_input_stream failed     I have tried to use a MPEG4 encoder for the video, and even removing the audio part of the pipeline in blue colour, but it happens the same.     Any hint? Is an AVIMUX problem? Is there some alternative (other AVI muxer)? Why ffplay plays the file?     THANKS in advance!     All the best.     LD. </body> </html>