On Tue, Dec 4, 2012 at 10:41 AM, Adrian Ibanez <adrianibane...@gmail.com> wrote: > Hi Dan > > I uploaded some additional samples: > > Rawfile without any processing/transcoding: > https://www.dropbox.com/sh/t0nd097xmfn8907/Zmu_ehVbcr/ZN1A0055.MOV > > After being processed with melt: > melt stuttering_dslr_footage.mov -consumer > avformat:stuttering_dslr_footage_meltprocessed.mp4 > https://www.dropbox.com/sh/t0nd097xmfn8907/Zmu_ehVbcr/stuttering_dslr_footage_meltprocessed.mp4 >
OK, I viewed the mp4 you made with melt, and I am not seeing that, which means you have a bad build of melt - either a bad combination of mlt/libav versions or possibly some new incompatibility with libav. I was not able to download the "raw" MOV, but I was able to download the one from the original message. Please download Shotcut and try it. It also comes with a standalone build of melt. You need to cd to the hidden Shotcut/.app directory to get to it - run the provided melt wrapper script instead of bin/melt directly. Meanwhile, soon I will make a build against libav master to see if that reproduces the problem and is still a problem or if it was just some bad combination. > melt stuttering_dslr_footage.mov -consumer xml > https://www.dropbox.com/sh/t0nd097xmfn8907/Zmu_ehVbcr/stuttering_dslr_footage.xml > > On Dec 4, 2012, at 7:02 PM, Dan Dennedy wrote: > >> On Tue, Dec 4, 2012 at 1:29 AM, Adrian Ibanez <adrianibane...@gmail.com> >> wrote: >>> Hi >>> >>> First of all: thanks for creating MLT! >>> >>> I'm expiriencing some strange "stuttering" problem with some canon DSLR >>> footage. It was filmed with a EOS 7D >>> I'll have access to the camera again soon to get some more sample clips >>> with other settings. >>> To workaround the issue I have put a timeconsuming transcoding step in >>> place … Being able to directly process such rawfootage would be a hughe >>> improvement to my workflow. >>> >> >> I am not certain I am seeing the problem you are seeing. It seems they >> play the same for me in Quicktime Player, ffplay, and melt built with >> FFmpeg. I have not tested it with libav. If there is a problem, it >> must be a very subtle like only occasionally a dropped frame. I assume >> siince you wrote "strange" that the problem you see is more gross than >> subtle. >> > Here the file plays nice using avplay, vlc and also quicktime player too. > But as soon as I try to process them with melt I'll see something like > stuttering_dslr_footage_meltprocessed.mp4. I'm also expiriencing massive > "framedrops" ( like one frame every 1-2 sek ) in the SDL preview > >> >>> What could be causing these hickups? So far I only expirienced the >>> behaviour with files from this particular camera. I also expirience the >>> same stuttering behaviour when transcoding the h264 stream to prores. >>> >> >> Even the prores.mov looks mostly the same between all 3 said players. >> Before I give this any more attention, you need to do a more >> compelling job of convincing me there is a problem. For example, you >> said the prores transcode exhibits the problem as well, but you have >> not said how you transcoded it or what all media players you played it >> in to narrow it down to a melt-specific problem. Perhaps another thing >> to do is test playback in one of my binary builds of Shotcut. > > Usually I try to playback video files using quicktime player, avplay and also > vlc > I conveted the prores.mov file using following command: > > avconv -i stuttering_dslr_footage.mov -vcodec prores -profile 0 -qscale 4 -an > prores.mov > > Let me know if shall provide any additional information > >> >>> 10Sek samples at: https://www.dropbox.com/sh/t0nd097xmfn8907/fJy15kz1Pg >>> >>> >>> >>> avprobe version v0.8-4074-g4caa1bf, Copyright (c) 2007-2012 the Libav >>> developers >>> built on Dec 3 2012 13:50:31 with llvm-gcc 4.2.1 (LLVM build 2336.9.00) >>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '001_packtools/ZN1A0055.MOV': >>> Metadata: >>> major_brand : qt >>> minor_version : 537331968 >>> compatible_brands: qt CAEP >>> creation_time : 2012-08-08 10:41:37 >>> Duration: 00:00:18.08, start: 0.000000, bitrate: 30697 kb/s >>> Stream #0.0(eng): Video: h264 (High), yuvj420p, 1920x1080 [PAR 1:1 DAR >>> 16:9], 29252 kb/s, 25 fps, 25 tbr, 25k tbn >>> Metadata: >>> creation_time : 2012-08-08 10:41:37 >>> Stream #0.1(eng): Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s >>> Metadata: >>> creation_time : 2012-08-08 10:41:37 >>> Stream #0.2(eng): Data: tmcd / 0x64636D74, 0 kb/s >>> Metadata: >>> creation_time : 2012-08-08 10:41:37 >>> Unsupported codec with id 0 for input stream 2 >>> # avprobe output >>> >>> best regards >> >> >> -- >> +-DRD-+ > -- +-DRD-+ ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
