X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fmodules%2Favformat%2Fproducer_avformat.c;h=c6c013553409fe25da7347efc12e0733e0fcebe9;hb=35bfd1603d15f70354524f4d59eab2f7b4eb4946;hp=7a176d88ae53edb7a447df7a9afe16027eb7f806;hpb=3833ec4ee7ffd18732242b30b602740d1ac7acad;p=melted diff --git a/src/modules/avformat/producer_avformat.c b/src/modules/avformat/producer_avformat.c index 7a176d8..c6c0135 100644 --- a/src/modules/avformat/producer_avformat.c +++ b/src/modules/avformat/producer_avformat.c @@ -57,7 +57,7 @@ mlt_producer producer_avformat_init( char *file ) if ( mlt_producer_init( this, NULL ) == 0 ) { // Get the properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Set the resource property (required for all producers) mlt_properties_set( properties, "resource", file ); @@ -89,7 +89,7 @@ static void find_default_streams( AVFormatContext *context, int *audio_index, in for( i = 0; i < context->nb_streams; i++ ) { // Get the codec context - AVCodecContext *codec_context = &context->streams[ i ]->codec; + AVCodecContext *codec_context = context->streams[ i ]->codec; // Determine the type and obtain the first index of each type switch( codec_context->codec_type ) @@ -156,7 +156,7 @@ static int producer_open( mlt_producer this, char *file ) AVFormatContext *context = NULL; // Get the properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // We will treat everything with the producer fps double fps = mlt_properties_get_double( properties, "fps" ); @@ -173,6 +173,9 @@ static int producer_open( mlt_producer this, char *file ) // AV option (0 = both, 1 = video, 2 = audio) int av = 0; + // Setting lowest log level + av_log_set_level( -1 ); + // Only if there is not a protocol specification that avformat can handle if ( mrl && !url_exist( file ) ) { @@ -193,8 +196,7 @@ static int producer_open( mlt_producer this, char *file ) // These are required by video4linux (defaults) params->width = 640; params->height = 480; - params->frame_rate = 25; - params->frame_rate_base = 1; + params->time_base= (AVRational){1,25}; params->device = file; params->channels = 2; params->sample_rate = 48000; @@ -215,9 +217,9 @@ static int producer_open( mlt_producer this, char *file ) if ( t ) t[0] = 0; if ( !strcmp( name, "frame_rate" ) ) - params->frame_rate = atoi( value ); + params->time_base.den = atoi( value ); else if ( !strcmp( name, "frame_rate_base" ) ) - params->frame_rate_base = atoi( value ); + params->time_base.num = atoi( value ); else if ( !strcmp( name, "sample_rate" ) ) params->sample_rate = atoi( value ); else if ( !strcmp( name, "channels" ) ) @@ -259,6 +261,7 @@ static int producer_open( mlt_producer this, char *file ) // We will default to the first audio and video streams found int audio_index = -1; int video_index = -1; + int av_bypass = 0; // Now set properties where we can (use default unknowns if required) if ( context->duration != AV_NOPTS_VALUE ) @@ -273,18 +276,29 @@ static int producer_open( mlt_producer this, char *file ) find_default_streams( context, &audio_index, &video_index ); if ( context->start_time != AV_NOPTS_VALUE ) - mlt_properties_set_double( properties, "start_time", context->start_time ); + mlt_properties_set_double( properties, "_start_time", context->start_time ); // Check if we're seekable (something funny about mpeg here :-/) - if ( strcmp( file, "pipe:" ) ) - mlt_properties_set_int( properties, "seekable", av_seek_frame( context, -1, mlt_properties_get_double( properties, "start_time" ) ) >= 0 ); + if ( strcmp( file, "pipe:" ) && strncmp( file, "http://", 6 ) ) + mlt_properties_set_int( properties, "seekable", av_seek_frame( context, -1, mlt_properties_get_double( properties, "_start_time" ), AVSEEK_FLAG_BACKWARD ) >= 0 ); + else + av_bypass = 1; // Store selected audio and video indexes on properties mlt_properties_set_int( properties, "audio_index", audio_index ); mlt_properties_set_int( properties, "video_index", video_index ); + + // Fetch the width, height and aspect ratio + if ( video_index != -1 ) + { + AVCodecContext *codec_context = context->streams[ video_index ]->codec; + mlt_properties_set_int( properties, "width", codec_context->width ); + mlt_properties_set_int( properties, "height", codec_context->height ); + mlt_properties_set_double( properties, "aspect_ratio", av_q2d( codec_context->sample_aspect_ratio ) ); + } // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later) - if ( av == 0 && strcmp( file, "pipe:" ) && audio_index != -1 && video_index != -1 ) + if ( av == 0 && !av_bypass && audio_index != -1 && video_index != -1 ) { // We'll use the open one as our video_context mlt_properties_set_data( properties, "video_context", context, 0, producer_file_close, NULL ); @@ -311,6 +325,8 @@ static int producer_open( mlt_producer this, char *file ) // Something has gone wrong error = -1; } + + mlt_properties_set_int( properties, "av_bypass", av_bypass ); } } @@ -326,7 +342,7 @@ static int producer_open( mlt_producer this, char *file ) static double producer_time_of_frame( mlt_producer this, mlt_position position ) { // Get the properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Obtain the fps double fps = mlt_properties_get_double( properties, "fps" ); @@ -337,51 +353,7 @@ static double producer_time_of_frame( mlt_producer this, mlt_position position ) static inline void convert_image( AVFrame *frame, uint8_t *buffer, int pix_fmt, mlt_image_format format, int width, int height ) { - // EXPERIMENTAL IMAGE NORMALISATIONS - if ( pix_fmt == PIX_FMT_YUV420P && format == mlt_image_yuv422 ) - { - register int i, j; - register int half = width >> 1; - register uint8_t *Y = ( ( AVPicture * )frame )->data[ 0 ]; - register uint8_t *U = ( ( AVPicture * )frame )->data[ 1 ]; - register uint8_t *V = ( ( AVPicture * )frame )->data[ 2 ]; - register uint8_t *d = buffer; - register uint8_t *y, *u, *v; - - i = height >> 1; - while ( i -- ) - { - y = Y; - u = U; - v = V; - j = half; - while ( j -- ) - { - *d ++ = *y ++; - *d ++ = *u ++; - *d ++ = *y ++; - *d ++ = *v ++; - } - - Y += ( ( AVPicture * )frame )->linesize[ 0 ]; - y = Y; - u = U; - v = V; - j = half; - while ( j -- ) - { - *d ++ = *y ++; - *d ++ = *u ++; - *d ++ = *y ++; - *d ++ = *v ++; - } - - Y += ( ( AVPicture * )frame )->linesize[ 0 ]; - U += ( ( AVPicture * )frame )->linesize[ 1 ]; - V += ( ( AVPicture * )frame )->linesize[ 2 ]; - } - } - else if ( format == mlt_image_yuv420p ) + if ( format == mlt_image_yuv420p ) { AVPicture pict; pict.data[0] = buffer; @@ -412,7 +384,7 @@ static inline void convert_image( AVFrame *frame, uint8_t *buffer, int pix_fmt, static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable ) { // Get the properties from the frame - mlt_properties frame_properties = mlt_frame_properties( frame ); + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame ); // Obtain the frame number of this frame mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" ); @@ -421,7 +393,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL ); // Get the producer properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Fetch the video_context AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL ); @@ -430,7 +402,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form int index = mlt_properties_get_int( properties, "video_index" ); // Obtain the expected frame numer - mlt_position expected = mlt_properties_get_position( properties, "video_expected" ); + mlt_position expected = mlt_properties_get_position( properties, "_video_expected" ); // Calculate the real time code double real_timecode = producer_time_of_frame( this, position ); @@ -439,7 +411,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form AVStream *stream = context->streams[ index ]; // Get codec context - AVCodecContext *codec_context = &stream->codec; + AVCodecContext *codec_context = stream->codec; // Packet AVPacket pkt; @@ -454,7 +426,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form int ignore = 0; // Current time calcs - double current_time = mlt_properties_get_double( properties, "current_time" ); + double current_time = mlt_properties_get_double( properties, "_current_time" ); // We may want to use the source fps if available double source_fps = mlt_properties_get_double( properties, "source_fps" ); @@ -465,6 +437,9 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form // Generate the size in bytes int size = 0; + // Hopefully provide better support for streams... + int av_bypass = mlt_properties_get_int( properties, "av_bypass" ); + // Set the result arguments that we know here (only *buffer is now required) *width = codec_context->width; *height = codec_context->height; @@ -503,13 +478,13 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form // Fast forward - seeking is inefficient for small distances - just ignore following frames ignore = position - expected; } - else if ( codec_context->gop_size == 0 || ( position < expected || position - expected >= 12 ) ) + else if ( seekable && ( position < expected || position - expected >= 12 ) ) { // Set to the real timecode - av_seek_frame( context, -1, mlt_properties_get_double( properties, "start_time" ) + real_timecode * 1000000.0 ); + av_seek_frame( context, -1, mlt_properties_get_double( properties, "_start_time" ) + real_timecode * 1000000.0, AVSEEK_FLAG_BACKWARD ); // Remove the cached info relating to the previous position - mlt_properties_set_double( properties, "current_time", real_timecode ); + mlt_properties_set_double( properties, "_current_time", real_timecode ); mlt_properties_set_data( properties, "av_frame", NULL, 0, NULL, NULL ); av_frame = NULL; @@ -517,8 +492,8 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form } // Duplicate the last image if necessary - if ( av_frame != NULL && ( paused || mlt_properties_get_double( properties, "current_time" ) >= real_timecode ) && - strcmp( mlt_properties_get( properties, "resource" ), "pipe:" ) ) + if ( av_frame != NULL && ( paused || mlt_properties_get_double( properties, "_current_time" ) >= real_timecode ) && + av_bypass == 0 ) { // Duplicate it convert_image( av_frame, *buffer, codec_context->pix_fmt, *format, *width, *height ); @@ -530,6 +505,11 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form { int ret = 0; int got_picture = 0; + int must_decode = 1; + + // Temporary hack to improve intra frame only + if ( !strcmp( codec_context->codec->name, "mjpeg" ) ) + must_decode = 0; memset( &pkt, 0, sizeof( pkt ) ); @@ -548,16 +528,18 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form // We only deal with video from the selected video_index if ( ret >= 0 && pkt.stream_index == index && pkt.size > 0 ) { + // Determine time code of the packet + if ( pkt.dts != AV_NOPTS_VALUE ) + current_time = av_q2d( stream->time_base ) * pkt.dts; + else + current_time = real_timecode; + // Decode the image - ret = avcodec_decode_video( codec_context, av_frame, &got_picture, pkt.data, pkt.size ); + if ( must_decode || current_time >= real_timecode ) + ret = avcodec_decode_video( codec_context, av_frame, &got_picture, pkt.data, pkt.size ); if ( got_picture ) { - if ( pkt.pts != AV_NOPTS_VALUE ) - current_time = ( double )pkt.pts / 1000000.0; - else - current_time = real_timecode; - // Handle ignore if ( ( int )( current_time * 100 ) < ( int )( real_timecode * 100 ) - 7 ) { @@ -566,14 +548,12 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form } else if ( current_time >= real_timecode ) { - //current_time = real_timecode; ignore = 0; } else if ( ignore -- ) { got_picture = 0; } - mlt_properties_set_int( properties, "top_field_first", av_frame->top_field_first ); } } @@ -584,6 +564,9 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form // Now handle the picture if we have one if ( got_picture ) { + mlt_properties_set_int( frame_properties, "progressive", !av_frame->interlaced_frame ); + mlt_properties_set_int( frame_properties, "top_field_first", av_frame->top_field_first ); + convert_image( av_frame, *buffer, codec_context->pix_fmt, *format, *width, *height ); mlt_properties_set_data( frame_properties, "image", *buffer, size, (mlt_destructor)mlt_pool_release, NULL ); @@ -592,11 +575,11 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form { double fps = mlt_properties_get_double( properties, "fps" ); current_time = ceil( source_fps * ( double )position / fps ) * ( 1 / source_fps ); - mlt_properties_set_double( properties, "current_time", current_time ); + mlt_properties_set_double( properties, "_current_time", current_time ); } else { - mlt_properties_set_double( properties, "current_time", current_time ); + mlt_properties_set_double( properties, "_current_time", current_time ); } } } @@ -606,7 +589,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form mlt_properties_get_int( properties, "top_field_first" ) ); // Regardless of speed, we expect to get the next frame (cos we ain't too bright) - mlt_properties_set_position( properties, "video_expected", position + 1 ); + mlt_properties_set_position( properties, "_video_expected", position + 1 ); return 0; } @@ -617,7 +600,7 @@ static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_form static void producer_set_up_video( mlt_producer this, mlt_frame frame ) { // Get the properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Fetch the video_context AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL ); @@ -626,7 +609,7 @@ static void producer_set_up_video( mlt_producer this, mlt_frame frame ) int index = mlt_properties_get_int( properties, "video_index" ); // Get the frame properties - mlt_properties frame_properties = mlt_frame_properties( frame ); + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame ); if ( context != NULL && index != -1 ) { @@ -634,7 +617,7 @@ static void producer_set_up_video( mlt_producer this, mlt_frame frame ) AVStream *stream = context->streams[ index ]; // Get codec context - AVCodecContext *codec_context = &stream->codec; + AVCodecContext *codec_context = stream->codec; // Get the codec AVCodec *codec = mlt_properties_get_data( properties, "video_codec", NULL ); @@ -662,32 +645,39 @@ static void producer_set_up_video( mlt_producer this, mlt_frame frame ) if ( codec != NULL ) { double source_fps = 0; + int norm_aspect_ratio = mlt_properties_get_int( properties, "norm_aspect_ratio" ); + double force_aspect_ratio = mlt_properties_get_double( properties, "force_aspect_ratio" ); + double aspect_ratio; // XXX: We won't know the real aspect ratio until an image is decoded // but we do need it now (to satisfy filter_resize) - take a guess based // on pal/ntsc - if ( codec_context->sample_aspect_ratio.num > 0 ) + if ( force_aspect_ratio > 0.0 ) { - mlt_properties_set_double( properties, "aspect_ratio", av_q2d( codec_context->sample_aspect_ratio ) ); + aspect_ratio = force_aspect_ratio; + } + else if ( !norm_aspect_ratio && codec_context->sample_aspect_ratio.num > 0 ) + { + aspect_ratio = av_q2d( codec_context->sample_aspect_ratio ); } else { int is_pal = mlt_properties_get_double( properties, "fps" ) == 25.0; - mlt_properties_set_double( properties, "aspect_ratio", is_pal ? 128.0/117.0 : 72.0/79.0 ); + aspect_ratio = is_pal ? 59.0/54.0 : 10.0/11.0; } - //fprintf( stderr, "AVFORMAT: sample aspect %f %dx%d\n", av_q2d( codec_context->sample_aspect_ratio ), codec_context->width, codec_context->height ); - // Determine the fps - source_fps = ( double )codec_context->frame_rate / ( codec_context->frame_rate_base == 0 ? 1 : codec_context->frame_rate_base ); + source_fps = ( double )codec_context->time_base.den / ( codec_context->time_base.num == 0 ? 1 : codec_context->time_base.num ); // We'll use fps if it's available if ( source_fps > 0 && source_fps < 30 ) mlt_properties_set_double( properties, "source_fps", source_fps ); + mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio ); // Set the width and height mlt_properties_set_int( frame_properties, "width", codec_context->width ); mlt_properties_set_int( frame_properties, "height", codec_context->height ); + mlt_properties_set_double( frame_properties, "aspect_ratio", aspect_ratio ); mlt_frame_push_get_image( frame, producer_get_image ); mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL ); @@ -709,7 +699,7 @@ static void producer_set_up_video( mlt_producer this, mlt_frame frame ) static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples ) { // Get the properties from the frame - mlt_properties frame_properties = mlt_frame_properties( frame ); + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame ); // Obtain the frame number of this frame mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" ); @@ -718,7 +708,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL ); // Get the producer properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Fetch the audio_context AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL ); @@ -730,7 +720,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form int seekable = mlt_properties_get_int( properties, "seekable" ); // Obtain the expected frame numer - mlt_position expected = mlt_properties_get_position( properties, "audio_expected" ); + mlt_position expected = mlt_properties_get_position( properties, "_audio_expected" ); // Obtain the resample context if it exists (not always needed) ReSampleContext *resample = mlt_properties_get_data( properties, "audio_resample", NULL ); @@ -739,7 +729,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form int16_t *audio_buffer = mlt_properties_get_data( properties, "audio_buffer", NULL ); // Get amount of audio used - int audio_used = mlt_properties_get_int( properties, "audio_used" ); + int audio_used = mlt_properties_get_int( properties, "_audio_used" ); // Calculate the real time code double real_timecode = producer_time_of_frame( this, position ); @@ -748,7 +738,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form AVStream *stream = context->streams[ index ]; // Get codec context - AVCodecContext *codec_context = &stream->codec; + AVCodecContext *codec_context = stream->codec; // Packet AVPacket pkt; @@ -800,7 +790,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form else if ( position < expected || position - expected >= 12 ) { // Set to the real timecode - if ( av_seek_frame( context, -1, mlt_properties_get_double( properties, "start_time" ) + real_timecode * 1000000.0 ) != 0 ) + if ( av_seek_frame( context, -1, mlt_properties_get_double( properties, "_start_time" ) + real_timecode * 1000000.0, AVSEEK_FLAG_BACKWARD ) != 0 ) paused = 1; // Clear the usage in the audio buffer @@ -870,7 +860,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form } // If we're behind, ignore this packet - float current_pts = (float)pkt.pts / 1000000.0; + float current_pts = av_q2d( stream->time_base ) * pkt.pts; if ( seekable && ( !ignore && current_pts <= ( real_timecode - 0.02 ) ) ) ignore = 1; } @@ -895,7 +885,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form } // Store the number of audio samples still available - mlt_properties_set_int( properties, "audio_used", audio_used ); + mlt_properties_set_int( properties, "_audio_used", audio_used ); // Release the temporary audio mlt_pool_release( temp ); @@ -903,13 +893,12 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form else { // Get silence and don't touch the context - frame->get_audio = NULL; mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples ); } // Regardless of speed (other than paused), we expect to get the next frame if ( !paused ) - mlt_properties_set_position( properties, "audio_expected", position + 1 ); + mlt_properties_set_position( properties, "_audio_expected", position + 1 ); return 0; } @@ -920,7 +909,7 @@ static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_form static void producer_set_up_audio( mlt_producer this, mlt_frame frame ) { // Get the properties - mlt_properties properties = mlt_producer_properties( this ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); // Fetch the audio_context AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL ); @@ -932,13 +921,13 @@ static void producer_set_up_audio( mlt_producer this, mlt_frame frame ) if ( context != NULL && index != -1 ) { // Get the frame properties - mlt_properties frame_properties = mlt_frame_properties( frame ); + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame ); // Get the audio stream AVStream *stream = context->streams[ index ]; // Get codec context - AVCodecContext *codec_context = &stream->codec; + AVCodecContext *codec_context = stream->codec; // Get the codec AVCodec *codec = mlt_properties_get_data( properties, "audio_codec", NULL ); @@ -966,7 +955,7 @@ static void producer_set_up_audio( mlt_producer this, mlt_frame frame ) // No codec, no show... if ( codec != NULL ) { - frame->get_audio = producer_get_audio; + mlt_frame_push_audio( frame, producer_get_audio ); mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL ); } } @@ -984,7 +973,7 @@ static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index mlt_frame_set_position( *frame, mlt_producer_position( this ) ); // Set the position of this producer - mlt_properties_set_position( mlt_frame_properties( *frame ), "avformat_position", mlt_producer_position( this ) ); + mlt_properties_set_position( MLT_FRAME_PROPERTIES( *frame ), "avformat_position", mlt_producer_frame( this ) ); // Set up the video producer_set_up_video( this, *frame ); @@ -993,7 +982,7 @@ static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index producer_set_up_audio( this, *frame ); // Set the aspect_ratio - mlt_properties_set_double( mlt_frame_properties( *frame ), "aspect_ratio", mlt_properties_get_double( mlt_producer_properties( this ), "aspect_ratio" ) ); + mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "aspect_ratio", mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "aspect_ratio" ) ); // Calculate the next timecode mlt_producer_prepare_next( this );