On Mon, Jan 6, 2014 at 8:01 AM, Geoffroy Montel <geoffroy.montel...@gmail.com> wrote: > Hello list, > > I'm running into a problem where the rendered video is not the > requested width : 682 instead of 640. > > * The MELT XML file starts with > > <mlt LC_NUMERIC="en_US.UTF-8"> > <profile width="640" height="360" display_aspect_num="16" > display_aspect_den="9" sample_aspect_num="1" sample_aspect_den="1"/> > > etc. > > * I'm generating the video with the following command line > > melt file.xml -consumer avformat:file.mp4 r=24 s=640x360 strict=experimental > > * ffprobe seems to say the format is 640x360 as requested > > ffprobe version N-59046-g1d0995e Copyright (c) 2007-2013 the FFmpeg developers > built on Dec 13 2013 15:19:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5) > configuration: --prefix=/opt/melt --enable-gpl --enable-version3 > --enable-shared --enable-debug --enable-pthreads > --enable-runtime-cpudetect --disable-doc --enable-libtheora > --enable-libvorbis --enable-libmp3lame --enable-libx264 > --enable-libvpx > libavutil 52. 58.100 / 52. 58.100 > libavcodec 55. 45.101 / 55. 45.101 > libavformat 55. 22.100 / 55. 22.100 > libavdevice 55. 5.102 / 55. 5.102 > libavfilter 3. 92.100 / 3. 92.100 > libswscale 2. 5.101 / 2. 5.101 > libswresample 0. 17.104 / 0. 17.104 > libpostproc 52. 3.100 / 52. 3.100 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > encoder : Lavf55.22.100 > Duration: 00:04:59.99, start: 0.000000, bitrate: 515 kb/s > Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 640x360 [SAR 16:15 DAR 256:135], 382 kb/s, 24 fps, 24 tbr, 12288 tbn,
The sample aspect ratio is that of MLT profile dv_pal. Quicktime is showing you the video resolution it is using after converting it to sample aspect ratio 1:1. > 48 tbc (default) > Metadata: > handler_name : VideoHandler > Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, > stereo, fltp, 128 kb/s (default) > Metadata: > handler_name : SoundHandler > > * but MacOSX finder says the video dimensions are 682 x 360, and when > I launch the video with either Quicktime or VLC, there are black > borders on the left and on the right. > > I'm using melt v0.9.1, ffmpeg version N-59046-g1d0995e > > Have I done something wrong with the profile definition or the command line ? > Many thanks in advance for your help ! You are making things more confusing by adding s=640x360 to the consumer, which affects the profile. You see, there is always a profile, and without specifying one at the melt command line, it attempts to do an auto-profile. Then, it sees a profile in the XML. Then, it gets additional profile information from the consumer property you set. As you see, things can get complicated. When you specify the avformat "s" property it thinks you are trying to take a project authored in one profile and trying to output in a different way. For example, you can take a 16:9 project with some things like coordinates and sizes expressed in absolute pixel positions and re-render that at a broadcast resolution, 4:3 with letterbox. In that case, it loads the project as a virtual clip into a new composition where the virtual clip has its profile expressed in the XML, and the new composition has its own profile, which in this case is dv_pal with a resolution override (but nothing else overridden). In short, you need to either remove s= and let the XML profile element stand on its own, or add aspect=@16/9 and progressive=1. -- +-DRD-+ ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
