[vlmc-devel] MLTTrack: Implement replaceWithBlank

[yikei lu]

If I use remove( int index ), the producer will be removed and blank
is not inserted therefore causing wrong length of blanks and tracks.

2016-07-29 22:24 GMT+09:00 Hugo Beauzée-Luyssen <hugo at beauzee.fr>:
> On 07/28/2016 02:39 PM, Yikai Lu wrote:
>>
>> vlmc | branch: master | Yikai Lu <luyikei.qmltu at gmail.com> | Thu Jul 28
>> 20:57:17 2016 +0900| [4e16dae848732a1496673e0c5d66417b25011e2f] | committer:
>> Yikai Lu
>>
>> MLTTrack: Implement replaceWithBlank
>>
>>>
>>> https://code.videolan.org/videolan/vlmc/commit/4e16dae848732a1496673e0c5d66417b25011e2f
>>
>> ---
>>
>>  src/Backend/ITrack.h         | 1 +
>>  src/Backend/MLT/MLTTrack.cpp | 7 +++++++
>>  src/Backend/MLT/MLTTrack.h   | 1 +
>>  3 files changed, 9 insertions(+)
>>
>> diff --git a/src/Backend/ITrack.h b/src/Backend/ITrack.h
>> index 9e2b836..bf9b9d1 100644
>> --- a/src/Backend/ITrack.h
>> +++ b/src/Backend/ITrack.h
>> @@ -34,6 +34,7 @@ namespace Backend
>>          virtual ~ITrack() = default;
>>
>>          virtual bool        insertAt( IInput& input, int64_t startFrame )
>> = 0;
>> +        virtual void        replaceWithBlank( int index ) = 0;
>>          virtual bool        append( IInput& input ) = 0;
>>          virtual bool        remove( int index ) = 0;
>>          // src and dist are indexes.
>> diff --git a/src/Backend/MLT/MLTTrack.cpp b/src/Backend/MLT/MLTTrack.cpp
>> index 033e0af..bf546f3 100644
>> --- a/src/Backend/MLT/MLTTrack.cpp
>> +++ b/src/Backend/MLT/MLTTrack.cpp
>> @@ -88,6 +88,13 @@ MLTTrack::insertAt( Backend::IInput& input, int64_t
>> startFrame )
>>      return !playlist()->insert_at( (int)startFrame, mltInput->producer(),
>> 1 );
>>  }
>>
>> +void
>> +MLTTrack::replaceWithBlank( int index )
>> +{
>> +    std::unique_ptr<Mlt::Producer> mltProducer(
>> playlist()->replace_with_blank( index ) );
>> +    playlist()->consolidate_blanks( 0 );
>> +}
>> +
>>  bool
>>  MLTTrack::append( Backend::IInput& input )
>>  {
>> diff --git a/src/Backend/MLT/MLTTrack.h b/src/Backend/MLT/MLTTrack.h
>> index 1e77c7b..dadd543 100644
>> --- a/src/Backend/MLT/MLTTrack.h
>> +++ b/src/Backend/MLT/MLTTrack.h
>> @@ -52,6 +52,7 @@ class MLTTrack : public ITrack, public MLTInput
>>          virtual Mlt::Producer*  producer() const override;
>>
>>          virtual bool        insertAt( IInput& input, int64_t startFrame )
>> override;
>> +        virtual void        replaceWithBlank( int index ) override;
>>          virtual bool        append( IInput& input ) override;
>>          virtual bool        remove( int index ) override;
>>          virtual bool        move( int src, int dist ) override;
>>
>> _______________________________________________
>> Vlmc-devel mailing list
>> Vlmc-devel at videolan.org
>> https://mailman.videolan.org/listinfo/vlmc-devel
>>
>
> Out of curiosity, what's this method purpose? Or more specifically, I
> suppose it's replacing a media with a blank area, but what's the difference
> with deleting a media?
>
> Regards,
>
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