Hi Lorenzo, Thank you for your reply (and also to Valentino for yours as well). I have tried your suggestion, and things look good.See additional comments below.
--- On Mon, 4/23/12, Lorenzo Sutton <lorenzofsut...@gmail.com> wrote: From: Lorenzo Sutton <lorenzofsut...@gmail.com> Subject: Re: [CinCV] Rendering with Cinellera To: cinelerra@skolelinux.no Received: Monday, April 23, 2012, 12:59 AM Hi, On 21/04/12 06:56, Murray Strome wrote: [...] > Should I be looking at rendering the Video and Audio streams separately? If > so, what settings should I use (perhaps .mpg video and .mpg audio?). This is what has proven to be the easiest for me, regardless of final format. Once you find options that suit your needs you may want to look into batch rendering to fire the audio and video rendering in one go. This resulted in my .m2v and .ac3 video/audio streams OK. [...] > If I do that, how do I combine the streams into a standard NSTC style .mpg > file containing audio and video compatible with the .mpg used to create DVDs > and in perfect synchronization? For the video usually use the "YUV4MPEG Stream" for video. If I have enough (lots!) disk space I just use the uncompressed one (no "pipe" option selected), because it seems to be the fastest to render. Otherwise I use it with the pipe option and this line in the pipe (I think it comes straight from the cinelerra manual): ffmpeg -f yuv4mpegpipe -i - -y -target dvd -flags +ilme+ildct % I only tried the pipe option that was the default, which did not work (some kind of error I did not understand). It seems to work well enough without the pipe. [...] For audio AC3 with a high bitrate (at least 256). I just used 256. Finally I use this ffmpeg line to mux them together (again I think it's from the cinelerra manual plus some modification): ffmpeg -i test.ac3 -i test.m2v -target pal-dvd -flags +ilme+ildct -vb 8000k test2.mpg (note that I mostly use PAL so in your case the -target shuold probably be -target ntsc-dvd) [...] I used the above except, as you suggested, with ntsc-dvd. I used -vb 8500k. Is this the same as -b? I could not find the differences in the man page. I just used the flags as you had them without understanding what they meant. I have since found this documentation on: http://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/Flags_Flags#ildct ilme Affects: Encoding, Video Codecs/Containers: MPEG 2 and MPEG 4. Interlaced fotage Force InterLaced Motion Estimation, this is only necessary if you are working with interlaced video. It will force FFMPEG to maintain Quality with interlace footage. If you wish to deinterlace your footage please use '-deinterlace' option, but this will cause a quality lose in the video. Rule of thumb is anything intended is for television is interlace, any other delivery format is most likely progressive. ildct Affects: Encoding, Video Use when encoding Interlaced footage to ensure that FFMPEG doesn't field merge your DCT. Only affects Interlaced footage. Thus, I guess it is probably safe to leave these in. Which usually gives satisfactory results. One advantage of having the audio and video files separate with a high quality video is that you can use those as "master" files to create different formats (e.g. DVD, web etc.) outside cinelerra and possibly script the process. Hope this helps. Ciao, Lorenzo. Yes, Lorenzo, this was VERY helpful. I now feel that I can begin to try to use some of the more powerful features of Cinelerra. I have a lot of 16mm movies that have been converted to HD video. The lab which did this did a fairly good job, but most scenes need colour correction. Also, the frame rate was different on many of the frames (usually 16fps, but sometimes 32 or 8 -- never the usual 24) so I have to adjust the frame rate. I had the conversion done with "no pull down" so that the video frames correspond exactly with the original film frames. Using Cinelerra is a bit more tedious than working with Pinnacle Studio in Windows, but already I can see that I am getting better quality with the combination of ffmpeg and Cinelerra, plus I much prefer to work in LINUX! Thanks again for your help (and thanks to all others who have been so patient with me and who have provided valuable advice). Murray
