On Fri, Dec 26, 2008 at 11:25 PM, Jean-Michel Pour? <jm at poure.com> wrote: > Dear Friends, > > I made some changes to export profiles using > http://itbroadcastanddigitalcinema.com/ffmpeg_howto.html > > There are still some problem: > > 1) H.264 rendering > Download and HDV movie from our footage page > http://www.kdenlive.org/contribution-manual/footage > > Then export to H.264. It is 4:3 and not 16:9
Looks fine in ffplay and vlc, but not inigo/kdenlive. I'll look into this. > 2) Lossless/HQ profiles > > Rendering to Mpeg2 and H.264 I-frames only works very well. > But I would prefer pcm_s16le audio codec. This is not possible, breaking > export. Is it because Mpeg2 and H.264 should never have uncompressed > sound? I am surprised. Any solution for uncompressed sound? "linear pcm" should be possible, but I have little experience with it. I will visit this after the next release. Please open an issue for it. > 3) Number of channels > Sometimes sources with several audio channels do not export well. Please be specific about which render options. > Example: http://www.poure.com/footage/sony-hdr-cx-6-1080i.mts > which has two pcm_s16le audio channels. I only see one 6-ch audio stream in that sample. I am not sure if you are referring to multi-channel (more than stereo) or multiple audio streams. Right now, MLT only deals with one audio stream. > So it might be usefull to add ac=2 to some export profiles. What is your > opinion? Some audio formats do not like >2 channels. Right now, the resampler which gets applied automatically to all producers should already convert 6 channels to stereo. Full multi-channel support needs some work. I loaded the above file into kdenlive and successfully rendered to MPEG-2 and AVC MP4 with stereo audio. -- +-DRD-+
