E M J Vaessen schrieb: > Hello, anyone out there? :-D > trying popen(mpeg2enc --multi-thread 8 --verbose 0 --aspect 3 --format 3 > --frame-rate 3 --video-bitrate 28000 --nonvideo-bitrate 384 --interlace-mode > 0 --force-b-b-p --video-buffer 448 --video-norm p --keep-hf --no-constraints > --sequence-header-every-gop --min-gop-size 6 --max-gop-size 6 -o > /data2//Madeira/test1.m2v)
> The rendering aborts directly giving this errors: > ++ WARN: [mpeg2enc] Progressive encoding selected with interlaced input! > ++ WARN: [mpeg2enc] (This will damage the chroma channels.) > **ERROR: [mpeg2enc] Rate control can't cope with a video buffer smaller > 4 frame intervals Hi Ed, first off, I don't have any clue what's going on here, but just systematic considertation gets us some steps ahead You're using mpeg2enc, which belongs to the 'mjpegtools'. Thus, there is no direct connection to Cinelerra, other than that you're feeding the output of a cinelerra render into the input of mpeg2enc. Thus, if it worked previously (and you really used identical parameters, even the same image size), then it must be a change to mpeg2enc. Next thing is the error message 'Rate control can't cope with a video buffer smaller 4 frame intervals'. Google turns up the following message http://www.mail-archive.com/mjpeg-users@lists.sourceforge.net/msg07414.html Note: I don't know what's going on, but I'm just doing "qualified guessing". This message as well as the warnings in your output point into some problems with Interlaced/Progressive material. Like as if the input stream to the encoder is marked as being 'interlaced', while you choose an encoding parameter for progressive material. Of course, the first question is what you *want* to do, and what your source material *actually* is like, i.e. is it interlaced or progressive, and do you want interlaced or progressive video as a final result? (Note Cinelerra has almost no real support for interlaced material, it just passes things through) Quoting from the manpage of mpeg2enc: > -I|--interlace-mode 0|1|2 > Set the sequence picture structure and block encoding type for MPEG-2 > streams. By default, this value is inferred from the interlacing tag of the > input stream. Setting 0 encodes frame-by-frame with support for interlaced > video turned off, and specifies that progressive chroma subsampling has > been used. Setting 1 encodes frame-by-frame with interlace-adapted motion > compensation and block encoding, and specifies that interlaced chroma > subsampling has been used. Setting 2 encodes interlaced material > field-by-field, which will produce more accurate results for highly textured > interlaced material with lots of motion, at the expense of generally less > efficiency. > This setting should match the interlaced-ness of the input stream, otherwise > chroma artifacts may be generated when the MPEG stream is played back. Maybe this gives any additional clues? Cheers Hermann Vosseler _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
