Re: [Mlt-devel] [PATCH] keep origin audio samples freq if audio_index=all is used
04.07.13 22:16, Dan Dennedy написав(ла): On Thu, Jul 4, 2013 at 4:35 AM, Maksym Veremeyenkove...@m1stereo.tv wrote: Hi, if option audio_index=all is specified for producer avformat it do not update samplerate. as result playback 44100 audio track is going faster and audio resampler do not activated. attached patch should fix this behavior This change contradicts the determination of frequency that appears earlier in the function: if ( self-audio_index == INT_MAX ) ... *frequency = FFMAX( self-max_frequency, *frequency ); Elsewhere, self-max_frequency is set to the highest sample rate while enumerating audio tracks. Perhaps the more correct change is to change that line to simply: *frequency = self-max_frequency; Can you test how that change works for you? it works -- Maksym Veremeyenko -- See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831iu=/4140/ostg.clktrk ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] Delete segments from input video file, output to another file
On Tue, Jul 23, 2013 at 9:59 AM, James Board jpboa...@yahoo.com wrote: Anyway, what is 'shotcut'? http://www.shotcut.org/ There is also http://www.openshotvideo.com/ -- Carl K -- See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831iu=/4140/ostg.clktrk ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] Delete segments from input video file, output to another file
I'm a new melt user. I want to do something simple. I'd like to take an existing avi file (in a raw format: no inter-frame compression like mpeg) and delete some segments. I tried a simple command like this melt InFile.avi in=80 out=120 -consumer avformat:OutFile.avi My intent was that only frames 80 to 120 will be in the output file OutFile.avi. But when I view OutFile.avi, all frames are the same as frame 80 in the input file. So this did not work. How can I correctly use melt to delete segments from an AVI file? That is correct, but probably your AVI is not seekable or readable by libavformat or MLT, or the particular version of libavformat your MLT build is using requires some more avformat encoding parameters to be set. I suggest that you use Shotcut to get acquainted with MLT and try some things out. Look at the XML it generates. See if it can play and seek on the file you are trying to read. Thanks for your help. The AVI file was generated by mencoder, so if melt uses the same libraries that mencoder uses, then it should be readable? DOes that make sense? Anyway, what is 'shotcut'? Did you mean 'shortcut'? I searched on the MLT documentation page http://www.mltframework.org/bin/view/MLT/Documentation for either and it didn't find anything. Thanks. Shotcut is essentially a GUI wrapper around the MLT library. I think the reason that Dan suggested that you look at it is because sometimes it can be easier to discover things by visual inspection and clicking around until you achieve your desired result. Another thing you can try is to use melt without specifying the consumer. If you do that, melt automatically selects the SDL consumer and the result is displayed on your screen. This way you can immediately see the result without opening the file in an player each time. mencoder and mlt both use libavcodec under the hood to provide codec support. Just because libavcodec can encode a particular codec does not necessarily mean it can decode it. You would have to check the codec support for the particular codec you are using. As an experiment, it would be interesting to use a more common codec to see if you can achieve the desired result. For example, use mencoder to encode the video as mpeg2 and see if it works with melt the way you want. ~BM -- See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831iu=/4140/ostg.clktrk ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] Delete segments from input video file, output to another file
I tried about 10 different video formats and could not get melt to work correctly with any of them. When I try to extract my video segment melt doesn't print any errors, and when I try to play the extracted segment, it shows the first image in the segment, which is the proper image. So, I think melt must understand that format. But the problem is that all of the extracted frames are the same as that first frame. does melt play the file correctly if you don't try to extract a segment? Try: # melt inputfile.AVI It should play correctly. Many of the input formats I tried were raw formats were each frame was stored whole and the pixels were in a YUV or RGB format. I was thinking that would be the lowest common denominator and should work with anything. I also tried mpeg2 formats as well. The raw formats can be tricky because sometimes, depending on the container, you have to specify the pixel format as a command line parameter. That's why I suggested mpeg2. If I try to play the file to the screen without specifying a consumer, melt usually displays a single image, then no other. However, in the xterm where I ran melt, it displays successive frame numbers as if everything is playing normally. Sanity check: Does your file play properly with mplayer, vlc and ffplay? If you can provide a simple ffmpeg command to convert my video to a format that melt supports, please send it to me. Or, if you can let me know which format melt supports, that would be good. I would expect this to work: # ffmpeg -i inputfile test.mpg # mlt test.mpg I'd rather not spend however much time building a complex GUI based on MLT if MLT doesn't support any of the formats that my video is in. There are precompiled binarys for all major platforms available here (look at the downloads section on the right): http://www.shotcut.org/ ~BM -- See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831iu=/4140/ostg.clktrk ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
