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    31 mai 2013, par

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Sur d’autres sites (13123)

  • Inconsistant rendering in mlt XML and C interface and 'hold' producer and avformat consumer

    14 octobre 2016, par Leif Andersen

    I am trying to create a short video that is just a single image. (I know its a bit silly, but its a test for something bigger).

    The code I have for rendering it is :

    #include <framework></framework>mlt.h>
    
#include 
    
#include 
    

    
int main() {
    
  if(mlt_factory_init(NULL)) {
    
    mlt_profile p = mlt_profile_init(NULL);
    
    mlt_consumer target = mlt_factory_consumer(p, "avformat", 
    
    mlt_producer source = mlt_factory_producer(p, "hold", "/Users/leif/logo.png");
    
    mlt_producer_set_in_and_out(source, 0, 10);
    
    mlt_consumer_connect(target, mlt_producer_service(source));
    
    mlt_consumer_start(target);
    

    
    sleep(5);
    
    mlt_consumer_stop(target);
    

    
    mlt_consumer_close(target);
    
    mlt_producer_close(source);
    
    mlt_factory_close();
    
  } else {
    
    printf("No\n");
    
  }
    

    
  return 0;
    
}

    Where logo.png is this file.

    When I run this code and play output.mp4, the picture comes out all garbelled. There is a green line in the middle and the logo is superimposed on itself a lot.

    On the other hand, if I change the consumer to be SDL, the image plays just fine.

    And finally, if I change the consumer to be XML, and then use the melt command line application to render it :

    melt -consumer avformat:xmlout.mp4 output.xml

    and play the video, it also plays fine.

    Is there something I am missing in the avformat consumer that I should be setting ? Or something else that I am missing here ?

    Edit : For reference, the outputted xml file : output.xml is :

    &lt;?xml version="1.0" encoding="utf-8"?>
    
<mlt version="6.2.0" root="/Users/leif/src/video/private" title="Anonymous Submission" parent="producer0" in="0" out="10">
    
      <profile description="DV/DVD PAL" width="720" height="576" progressive="0" colorspace="601"></profile>
    
  <producer title="Anonymous Submission" in="0" out="10">
    
    <property>15000</property>
    
    <property>pause</property>
    
    <property>/Users/leif/logo.png</property>
    
    <property>1.06667</property>
    
    <property>0</property>
    
    <property>onefield</property>
    
    <property>hold</property>
    
    <property>1</property>
    
  </producer>
    
</mlt>

  • Inconsistant rendering in libmelt XML and C interface and 'hold' producer and avformat consumer

    14 octobre 2016, par Leif Andersen

    I am trying to create a short video that is just a single image. (I know its a bit silly, but its a test for something bigger).

    The code I have for rendering it is :

    #include <framework></framework>mlt.h>
    
#include 
    
#include 
    

    
int main() {
    
  if(mlt_factory_init(NULL)) {
    
    mlt_profile p = mlt_profile_init(NULL);
    
    mlt_consumer target = mlt_factory_consumer(p, "avformat", 
    
    mlt_producer source = mlt_factory_producer(p, "hold", "/Users/leif/logo.png");
    
    mlt_producer_set_in_and_out(source, 0, 10);
    
    mlt_consumer_connect(target, mlt_producer_service(source));
    
    mlt_consumer_start(target);
    

    
    sleep(5);
    
    mlt_consumer_stop(target);
    

    
    mlt_consumer_close(target);
    
    mlt_producer_close(source);
    
    mlt_factory_close();
    
  } else {
    
    printf("No\n");
    
  }
    

    
  return 0;
    
}

    Where logo.png is this file.

    When I run this code and play output.mp4, the picture comes out all garbelled. There is a green line in the middle and the logo is superimposed on itself a lot.

    On the other hand, if I change the consumer to be SDL, the image plays just fine.

    And finally, if I change the consumer to be XML, and then use the melt command line application to render it :

    melt -consumer avformat:xmlout.mp4 output.xml

    and play the video, it also plays fine.

    Is there something I am missing in the avformat consumer that I should be setting ? Or something else that I am missing here ?

    Edit : For reference, the outputted xml file : output.xml is :

    &lt;?xml version="1.0" encoding="utf-8"?>
    
<mlt version="6.2.0" root="/Users/leif/src/video/private" title="Anonymous Submission" parent="producer0" in="0" out="10">
    
      <profile description="DV/DVD PAL" width="720" height="576" progressive="0" colorspace="601"></profile>
    
  <producer title="Anonymous Submission" in="0" out="10">
    
    <property>15000</property>
    
    <property>pause</property>
    
    <property>/Users/leif/logo.png</property>
    
    <property>1.06667</property>
    
    <property>0</property>
    
    <property>onefield</property>
    
    <property>hold</property>
    
    <property>1</property>
    
  </producer>
    
</mlt>

  • avfilter/vf_unsharp : limit matrix size in either direction to 23

    17 septembre 2016, par Paul B Mahol
    avfilter/vf_unsharp : limit matrix size in either direction to 23

    Anything bigger is not supported anyway.
    

    Signed-off-by : Paul B Mahol <onemda@gmail.com>
    • [DH] doc/filters.texi
    • [DH] libavfilter/vf_unsharp.c

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