Hi all, I stream from one host to another. Sometimes the receiver is able to read the stream. Sometimes the receiver fails to start - why is that ? Sender: ffmpeg -video_size 864x432 -framerate 25 -f x11grab -show_region 1 - follow_mouse centered -i :0.0+0,0 -c:v libx264 -f mpegts udp://t420.netmaster.dk:8001 Receiver: ffmpeg -y -i udp://localhost:8001 -c copy -f mpegts test.ts . . . . [h264 @ 0x1f56760] decode_slice_header error [h264 @ 0x1f56760] no frame! [h264 @ 0x1f56760] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x1f56760] decode_slice_header error [h264 @ 0x1f56760] no frame! [h264 @ 0x1f56760] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x1f56760] decode_slice_header error [h264 @ 0x1f56760] no frame! [h264 @ 0x1f56760] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x1f56760] decode_slice_header error [h264 @ 0x1f56760] no frame! [h264 @ 0x1f56760] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x1f56760] decode_slice_header error [h264 @ 0x1f56760] no frame! [h264 @ 0x1f56760] non-existing PPS 0 referenced [mpegts @ 0x1f420e0] decoding for stream 0 failed [mpegts @ 0x1f420e0] Could not find codec parameters for stream 0 (Video: h264 ([27][0][0][0] / 0x001B), none): unspecified size Consider increasing the value for the 'analyzeduration' and 'probesize' options udp://localhost:8001: could not find codec parameters Input #0, mpegts, from 'udp://localhost:8001': Duration: N/A, start: 35.880000, bitrate: N/A Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Video: h264 ([27][0][0][0] / 0x001B), none, 25 fps, 25 tbr, 90k tbn, 180k tbc Output #0, mpegts, to 'test.ts': Output file #0 does not contain any stream Thanks Thomas S