Hi, regarding the attempt to use ffmpeg-4.4, I realized that from a certain point on the mails became private between Andrew and me and therefore they do not appear in the mailing list. I will report here the content of those mails, but I anticipate that I could not get CinGG to work with ffmpeg-4.4. Me: Excluding patch5 we came close to completing the build. Now the errors are about bdwrite and lv2. Note: in Arch Linux lv2 are located in "usr/lib/lv2". (thanks for the help you're giving me!) Andrew: Oh, this api hiding patch landed (it was reverted for 4.4 releases as far As i know) Try additionally patch Cin with this: https://raw.githubusercontent.com/Randrianasulu/CinelerraGG-slackbuild/maste... And may be https://raw.githubusercontent.com/Randrianasulu/CinelerraGG-slackbuild/maste... Me: I am unable to patch the sources. I get the following error: $ patch -p3 ffmpeg.C < ffmpeg.git_internal_api.patch patching file ffmpeg.C Hunk #3 succeeded at 4068 (offset 124 lines). patching file ffmpeg.C Hunk #1 FAILED at 89. 1 out of 1 hunk FAILED -- saving rejects to file ffmpeg.C.rej (the same error exists also when I don't put -pX, or I put p0, p1, etc) The contents of ffmpeg.C.rej are: --- a/cinelerra-5.1/cinelerra/mainerror.h +++ b/cinelerra-5.1/cinelerra/mainerror.h @@ -89,7 +89,7 @@ private: // format text to error dialog listbox -static inline void eprint1(const char *func, const char *fmt, ...) +static void eprint1(const char *func, const char *fmt, ...) { char err_msg[1024], *cp = err_msg, *ep = cp + sizeof(err_msg)-1; va_list va; I don't understand; first I patched mainerror.h and it seems OK. Then I patched ffmpeg.C and it gives me the error, but the error seems to refer to mainerror.h and not to ffmpeg.C. I also tried to reverse the order of the patches but the result does not change. I think working on the code is beyond my capabilities and I'm wasting your time unnecessarily. Andrew: Try with git apply? Me: Error, again: $ git apply ffmpeg.git_internal_api.patch error: patch failed: cinelerra-5.1/cinelerra/mainerror.h:89 error: cinelerra-5.1/cinelerra/mainerror.h: patch does not apply Andrew: May be this part already change by previous patching? I think i rolled two patches into one at some point.. Try to revert smaller patch first? Me: I've tried the patch revert; I've tried re-downloading all the source and doing new tests. The result is always failure. I should know how to get my hands on the code to find solutions to errors. But since I don't know how to do that I would say I give up. Sorry for all the time wasted. Thank you. Me: I attach the log of an attempt with only the mainerror_gcc5.diff patch I started with a new "git clone" in order to have the system clean. ffmpeg.git_internal_api.patch still doesn't work; probably due to my Arch linux having differences with your Slackware. Trying to replace ffmpeg-4.3 with ffmpeg-4.4 I don't know how to do in a static build. But I guess that's beyond my poor skills as well.