Using Freeswitch 1.8.5 release version we are trying to play a PNG image file to individual video conference members. Per confluence the API is: conference <confname> play [{vol=<volume>,full-screen=true,png_ms=100}]<file-path> [async|<member_id> [nomux]] Doing this API and omitting the details after the file-path, the PNG image is displayed to all conference members. If we include the member_id afterward in order to send the image to just one member, suddenly Freeswitch complains: 2019-05-10 10:23:11.288415 [ERR] mod_png.c:120 Channel has no video and audio_file is not set! To confirm, the participant is a video channel. “The information transmitted is intended only for the person or entity to which it is addressed and may contain proprietary, business-confidential and/or privileged material. If you are not the intended recipient of this message you are hereby notified that any use, review, retransmission, dissemination, distribution, reproduction or any action taken in reliance upon this message is prohibited. If you received this in error, please contact the sender and delete the material from any computer.”