Users have no means to find out from a failure how to make it work or is it preferred to check and print a warning for h264 concat without auto_convert ?
3331213 avformat/concatdec: Enable auto_convert by default
doc/demuxers.texi | 1 +
libavformat/concatdec.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)