130c6497d2
Fix crash, for example in the command:
ffmpeg -f image2 -vcodec pgmyuv -i tests/vsynth1/%02d.pgm \
-vf "[in]format=yuv420p,split,alphamerge,split[o3][o4];
[o4]vflip,alphaextract[alpha];[o3][alpha]alphamerge[out]" \
-vcodec rawvideo -f nut md5:
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.