78d16b6a51
query_formats() returning EAGAIN is not considered a progress in the format negotiation. If the filter returns EAGAIN but did set some of its formats lists, it could be considered a partial success and counted as progress in the negotiation. Not counting it is not a problem because it currently only happens in the first round, where there will always be some progress on the other filters.
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory in git. You can also view it online at http://ffmpeg.org/documentation.html 2) Licensing ------------ * See the LICENSE file. 3) Build and Install -------------------- * See the INSTALL file.