research.m1stereo.tv/gitweb/ - melted/blob - src/modules/avformat/consumer_avformat.c

   1 /*
   2  * consumer_avformat.c -- an encoder based on avformat
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 // Local header files
  22 #include "consumer_avformat.h"
  23
  24 // mlt Header files
  25 #include <framework/mlt_frame.h>
  26
  27 // System header files
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <pthread.h>
  32
  33 #include <math.h>
  34
  35 // avformat header files
  36 #include <ffmpeg/avformat.h>
  37
  38 typedef struct
  39 {
  40         int16_t *buffer;
  41         int size;
  42         int used;
  43 }
  44 *sample_fifo, sample_fifo_s;
  45
  46 sample_fifo sample_fifo_init( )
  47 {
  48         return calloc( 1, sizeof( sample_fifo_s ) );
  49 }
  50
  51 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  52 {
  53         if ( ( this->size - this->used ) < count )
  54         {
  55                 this->size += count * 5;
  56                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  57         }
  58
  59         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
  60         this->used += count;
  61 }
  62
  63 int sample_fifo_used( sample_fifo this )
  64 {
  65         return this->used;
  66 }
  67
  68 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
  69 {
  70         if ( count > this->used )
  71                 count = this->used;
  72
  73         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
  74         this->used -= count;
  75         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
  76
  77         return count;
  78 }
  79
  80 void sample_fifo_close( sample_fifo this )
  81 {
  82         free( this->buffer );
  83         free( this );
  84 }
  85
  86 // Forward references.
  87 static int consumer_start( mlt_consumer this );
  88 static int consumer_stop( mlt_consumer this );
  89 static int consumer_is_stopped( mlt_consumer this );
  90 static void *consumer_thread( void *arg );
  91 static void consumer_close( mlt_consumer this );
  92
  93 /** Initialise the dv consumer.
  94 */
  95
  96 mlt_consumer consumer_avformat_init( char *arg )
  97 {
  98         // Allocate the consumer
  99         mlt_consumer this = calloc( 1, sizeof( struct mlt_consumer_s ) );
 100
 101         // If memory allocated and initialises without error
 102         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
 103         {
 104                 // Get properties from the consumer
 105                 mlt_properties properties = mlt_consumer_properties( this );
 106
 107                 // Assign close callback
 108                 this->close = consumer_close;
 109
 110                 // Interpret the argument
 111                 if ( arg != NULL )
 112                         mlt_properties_set( properties, "target", arg );
 113
 114                 // sample and frame queue
 115                 mlt_properties_set_data( properties, "sample_fifo", sample_fifo_init( ), 0, ( mlt_destructor )sample_fifo_close, NULL );
 116                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 117
 118                 // Set avformat defaults
 119                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 120                 mlt_properties_set_int( properties, "video_bit_rate", 400000 );
 121                 mlt_properties_set_int( properties, "gop_size", 12 );
 122                 mlt_properties_set_int( properties, "max_b_frames", 0 );
 123                 mlt_properties_set_int( properties, "mb_decision", 0 );
 124
 125                 // Ensure termination at end of the stream
 126                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 127
 128                 // Set up start/stop/terminated callbacks
 129                 this->start = consumer_start;
 130                 this->stop = consumer_stop;
 131                 this->is_stopped = consumer_is_stopped;
 132         }
 133         else
 134         {
 135                 // Clean up in case of init failure
 136                 free( this );
 137                 this = NULL;
 138         }
 139
 140         // Return this
 141         return this;
 142 }
 143
 144 /** Start the consumer.
 145 */
 146
 147 static int consumer_start( mlt_consumer this )
 148 {
 149         // Get the properties
 150         mlt_properties properties = mlt_consumer_properties( this );
 151
 152         // Check that we're not already running
 153         if ( !mlt_properties_get_int( properties, "running" ) )
 154         {
 155                 // Allocate a thread
 156                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 157                 pthread_attr_t thread_attributes;
 158
 159                 // Get the width and height
 160                 int width = mlt_properties_get_int( properties, "width" );
 161                 int height = mlt_properties_get_int( properties, "height" );
 162
 163                 // Obtain the size property
 164                 char *size =  mlt_properties_get( properties, "size" );
 165
 166                 // Interpret it
 167                 if ( size != NULL )
 168                 {
 169                         int tw, th;
 170                         if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
 171                         {
 172                                 width = tw;
 173                                 height = th;
 174                         }
 175                         else
 176                         {
 177                                 fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
 178                         }
 179                 }
 180
 181                 // Now ensure we honour the multiple of two requested by libavformat
 182                 mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
 183                 mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
 184
 185                 // Assign the thread to properties
 186                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 187
 188                 // Set the running state
 189                 mlt_properties_set_int( properties, "running", 1 );
 190
 191                 // Inherit the scheduling priority
 192                 pthread_attr_init( &thread_attributes );
 193                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 194
 195                 // Create the thread
 196                 pthread_create( thread, &thread_attributes, consumer_thread, this );
 197         }
 198         return 0;
 199 }
 200
 201 /** Stop the consumer.
 202 */
 203
 204 static int consumer_stop( mlt_consumer this )
 205 {
 206         // Get the properties
 207         mlt_properties properties = mlt_consumer_properties( this );
 208
 209         // Check that we're running
 210         if ( mlt_properties_get_int( properties, "running" ) )
 211         {
 212                 // Get the thread
 213                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 214
 215                 // Stop the thread
 216                 mlt_properties_set_int( properties, "running", 0 );
 217
 218                 // Wait for termination
 219                 pthread_join( *thread, NULL );
 220         }
 221
 222         return 0;
 223 }
 224
 225 /** Determine if the consumer is stopped.
 226 */
 227
 228 static int consumer_is_stopped( mlt_consumer this )
 229 {
 230         // Get the properties
 231         mlt_properties properties = mlt_consumer_properties( this );
 232         return !mlt_properties_get_int( properties, "running" );
 233 }
 234
 235 /** Add an audio output stream
 236 */
 237
 238 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 239 {
 240         // Get the properties
 241         mlt_properties properties = mlt_consumer_properties( this );
 242
 243         // Create a new stream
 244     AVStream *st = av_new_stream( oc, 1 );
 245
 246         // If created, then initialise from properties
 247     if ( st != NULL )
 248         {
 249         AVCodecContext *c = &st->codec;
 250         c->codec_id = codec_id;
 251         c->codec_type = CODEC_TYPE_AUDIO;
 252
 253         // Put sample parameters
 254         c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 255         c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 256         c->channels = mlt_properties_get_int( properties, "channels" );
 257         }
 258         else
 259         {
 260         fprintf( stderr, "Could not allocate a stream for audio\n" );
 261     }
 262
 263     return st;
 264 }
 265
 266 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 267 {
 268         // We will return the audio input size from here
 269         int audio_input_frame_size = 0;
 270
 271         // Get the context
 272     AVCodecContext *c = &st->codec;
 273
 274         // Find the encoder
 275     AVCodec *codec = avcodec_find_encoder( c->codec_id );
 276
 277         // Continue if codec found and we can open it
 278         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 279         {
 280         // ugly hack for PCM codecs (will be removed ASAP with new PCM
 281         // support to compute the input frame size in samples
 282         if ( c->frame_size <= 1 )
 283                 {
 284                 audio_input_frame_size = audio_outbuf_size / c->channels;
 285                 switch(st->codec.codec_id)
 286                         {
 287                         case CODEC_ID_PCM_S16LE:
 288                         case CODEC_ID_PCM_S16BE:
 289                         case CODEC_ID_PCM_U16LE:
 290                         case CODEC_ID_PCM_U16BE:
 291                         audio_input_frame_size >>= 1;
 292                         break;
 293                         default:
 294                         break;
 295                 }
 296         }
 297                 else
 298                 {
 299                 audio_input_frame_size = c->frame_size;
 300         }
 301         }
 302         else
 303         {
 304                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 305         }
 306
 307         return audio_input_frame_size;
 308 }
 309
 310 static void close_audio( AVFormatContext *oc, AVStream *st )
 311 {
 312     avcodec_close( &st->codec );
 313 }
 314
 315 /** Add a video output stream
 316 */
 317
 318 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 319 {
 320         // Get the properties
 321         mlt_properties properties = mlt_consumer_properties( this );
 322
 323         // Create a new stream
 324     AVStream *st = av_new_stream( oc, 0 );
 325
 326     if ( st != NULL )
 327         {
 328                 AVCodecContext *c = &st->codec;
 329         c->codec_id = codec_id;
 330         c->codec_type = CODEC_TYPE_VIDEO;
 331
 332         // put sample parameters
 333         c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 334         c->width = mlt_properties_get_int( properties, "width" );
 335         c->height = mlt_properties_get_int( properties, "height" );
 336         c->frame_rate = mlt_properties_get_double( properties, "fps" );
 337         c->frame_rate_base = 1;
 338         c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 339         c->max_b_frames = mlt_properties_get_int( properties, "max_b_frames" );
 340         c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 341
 342         // Some formats want stream headers to be seperate (hmm)
 343         if( !strcmp( oc->oformat->name, "mp4" ) ||
 344                         !strcmp( oc->oformat->name, "mov" ) ||
 345                         !strcmp( oc->oformat->name, "3gp" ) )
 346                 c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 347         }
 348         else
 349         {
 350         fprintf( stderr, "Could not allocate a stream for video\n" );
 351     }
 352
 353     return st;
 354 }
 355
 356 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 357 {
 358         // Allocate a frame
 359     AVFrame *picture = avcodec_alloc_frame();
 360
 361         // Determine size of the
 362         int size = avpicture_get_size(pix_fmt, width, height);
 363
 364         // Allocate the picture buf
 365         uint8_t *picture_buf = av_malloc(size);
 366
 367         // If we have both, then fill the image
 368         if ( picture != NULL && picture_buf != NULL )
 369         {
 370                 // Fill the frame with the allocated buffer
 371         avpicture_fill((AVPicture *)picture, picture_buf, pix_fmt, width, height);
 372         }
 373         else
 374         {
 375                 // Something failed - clean up what we can
 376         av_free(picture);
 377         av_free(picture_buf);
 378         picture = NULL;
 379         }
 380
 381     return picture;
 382 }
 383
 384 static int open_video(AVFormatContext *oc, AVStream *st)
 385 {
 386         // Get the codec
 387     AVCodecContext *c = &st->codec;
 388
 389     // find the video encoder
 390     AVCodec *codec = avcodec_find_encoder(c->codec_id);
 391
 392         // Open the codec safely
 393         return codec != NULL && avcodec_open(c, codec) >= 0;
 394 }
 395
 396 void close_video(AVFormatContext *oc, AVStream *st)
 397 {
 398     avcodec_close(&st->codec);
 399 }
 400
 401 /** The main thread - the argument is simply the consumer.
 402 */
 403
 404 static void *consumer_thread( void *arg )
 405 {
 406         // Map the argument to the object
 407         mlt_consumer this = arg;
 408
 409         // Get the properties
 410         mlt_properties properties = mlt_consumer_properties( this );
 411
 412         // Get the terminate on pause property
 413         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 414
 415         // Get the frame rate
 416         int fps = mlt_properties_get_double( properties, "fps" );
 417
 418         // Get width and height
 419         int width = mlt_properties_get_int( properties, "width" );
 420         int height = mlt_properties_get_int( properties, "height" );
 421         int img_width = width;
 422         int img_height = height;
 423
 424         // Get default audio properties
 425         mlt_audio_format aud_fmt = mlt_audio_pcm;
 426         int channels = mlt_properties_get_int( properties, "channels" );
 427         int frequency = mlt_properties_get_int( properties, "frequency" );
 428         int16_t *pcm = NULL;
 429         int samples = 0;
 430
 431         // AVFormat audio buffer and frame size
 432         int audio_outbuf_size = 10000;
 433         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 434         int audio_input_frame_size = 0;
 435
 436         // AVFormat video buffer and frame count
 437         int frame_count = 0;
 438         int video_outbuf_size = 200000;
 439         uint8_t *video_outbuf = av_malloc(video_outbuf_size);
 440
 441         // Used for the frame properties
 442         mlt_frame frame = NULL;
 443         mlt_properties frame_properties = NULL;
 444
 445         // Get the queues
 446         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 447         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 448
 449         // Need two av pictures for converting
 450         AVFrame *output = alloc_picture( PIX_FMT_YUV420P, width, height );
 451         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 452
 453         // For receiving images from an mlt_frame
 454         uint8_t *image;
 455         mlt_image_format img_fmt = mlt_image_yuv422;
 456
 457         // Fo receiving audio samples back from the fifo
 458         int16_t buffer[ 48000 * 2 ];
 459         int count = 0;
 460
 461         // Allocate the context
 462     AVFormatContext *oc = av_alloc_format_context();
 463
 464         // Streams
 465     AVStream *audio_st = NULL;
 466         AVStream *video_st = NULL;
 467
 468         // Time stamps
 469     double audio_pts, video_pts;
 470
 471         // Loop variable
 472         int i;
 473
 474         // Determine the format
 475     AVOutputFormat *fmt = NULL;
 476         char *filename = mlt_properties_get( properties, "target" );
 477         char *format = mlt_properties_get( properties, "format" );
 478         //char *vcodec = mlt_properties_get( properties, "vcodec" );
 479         //char *acodec = mlt_properties_get( properties, "acodec" );
 480
 481         // Check for user selected format first
 482         if ( format != NULL )
 483                 fmt = guess_format( format, NULL, NULL );
 484
 485         // Otherwise check on the filename
 486         if ( fmt == NULL && filename != NULL )
 487                 fmt = guess_format( NULL, filename, NULL );
 488
 489         // Otherwise default to mpeg
 490         if ( fmt == NULL )
 491                 fmt = guess_format( "mpeg", NULL, NULL );
 492
 493         // We need a filename - default to stdout?
 494         if ( filename == NULL )
 495                 filename = "pipe:";
 496
 497         // Update the output context
 498         oc->oformat = fmt;
 499     snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 500
 501         // Add audio and video streams
 502     if ( fmt->video_codec != CODEC_ID_NONE )
 503         video_st = add_video_stream( this, oc, fmt->video_codec );
 504     if ( fmt->audio_codec != CODEC_ID_NONE )
 505         audio_st = add_audio_stream( this, oc, fmt->audio_codec );
 506
 507         // Set the parameters (even though we have none...)
 508     if ( av_set_parameters(oc, NULL) >= 0 )
 509         {
 510             if ( video_st && !open_video( oc, video_st ) )
 511                         video_st = NULL;
 512         if ( audio_st )
 513                 audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 514
 515         // Open the output file, if needed
 516         if ( !( fmt->flags & AVFMT_NOFILE ) )
 517                 {
 518                 if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 519                         {
 520                 fprintf(stderr, "Could not open '%s'\n", filename);
 521                                 mlt_properties_set_int( properties, "running", 0 );
 522                 }
 523         }
 524
 525         // Write the stream header, if any
 526                 if ( mlt_properties_get_int( properties, "running" ) )
 527                 av_write_header( oc );
 528         }
 529         else
 530         {
 531         fprintf(stderr, "Invalid output format parameters\n");
 532                 mlt_properties_set_int( properties, "running", 0 );
 533     }
 534
 535         // Last check - need at least one stream
 536         if ( audio_st == NULL && video_st == NULL )
 537                 mlt_properties_set_int( properties, "running", 0 );
 538
 539         // Loop while running
 540         while( mlt_properties_get_int( properties, "running" ) )
 541         {
 542                 // Get the frame
 543                 frame = mlt_consumer_rt_frame( this );
 544
 545                 // Check that we have a frame to work with
 546                 if ( frame != NULL )
 547                 {
 548                         // Default audio args
 549                         frame_properties = mlt_frame_properties( frame );
 550
 551                         // Get audio and append to the fifo
 552                         if ( audio_st )
 553                         {
 554                                 samples = mlt_sample_calculator( fps, frequency, count );
 555                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 556                                 sample_fifo_append( fifo, pcm, samples * channels );
 557                         }
 558
 559                         // Encode the image
 560                         if ( video_st )
 561                                 mlt_deque_push_back( queue, frame );
 562                         else
 563                                 mlt_frame_close( frame );
 564
 565                         // While we have stuff to process, process...
 566                         while ( 1 )
 567                         {
 568                         // Compute current audio and video time
 569                         if (audio_st)
 570                                 audio_pts = (double)audio_st->pts.val * oc->pts_num / oc->pts_den;
 571                         else
 572                                 audio_pts = 0.0;
 573
 574                         if (video_st)
 575                                 video_pts = (double)video_st->pts.val * oc->pts_num / oc->pts_den;
 576                         else
 577                                 video_pts = 0.0;
 578
 579                         // Write interleaved audio and video frames
 580                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 581                                 {
 582                                         if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 583                                         {
 584                                 int out_size;
 585                                                 AVCodecContext *c;
 586
 587                                                 c = &audio_st->codec;
 588
 589                                                 sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 590
 591                                                 out_size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 592
 593                                                 // Write the compressed frame in the media file
 594                                                 if (av_write_frame(oc, audio_st->index, audio_outbuf, out_size) != 0)
 595                                                 fprintf(stderr, "Error while writing audio frame\n");
 596                                         }
 597                                         else
 598                                         {
 599                                                 break;
 600                                         }
 601                                 }
 602                         else if ( video_st )
 603                                 {
 604                                         if ( mlt_deque_count( queue ) )
 605                                         {
 606                                                 int out_size, ret;
 607                                                 AVCodecContext *c;
 608
 609                                                 frame = mlt_deque_pop_front( queue );
 610                                                 frame_properties = mlt_frame_properties( frame );
 611
 612                                                 if ( terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0 )
 613                                                 {
 614                                                         mlt_properties_set_int( properties, "running", 0 );
 615                                                         break;
 616                                                 }
 617
 618                                                 c = &video_st->codec;
 619
 620                                                 if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 621                                                 {
 622                                                         int i = 0;
 623                                                         int j = 0;
 624                                                         uint8_t *p;
 625                                                         uint8_t *q;
 626
 627                                                         mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 628
 629                                                         q = image;
 630
 631                                                         for ( i = 0; i < height; i ++ )
 632                                                         {
 633                                                                 p = input->data[ 0 ] + i * input->linesize[ 0 ];
 634                                                                 j = width;
 635                                                                 while( j -- )
 636                                                                 {
 637                                                                         *p ++ = *q ++;
 638                                                                         *p ++ = *q ++;
 639                                                                 }
 640                                                         }
 641
 642                                                         img_convert( ( AVPicture * )output, PIX_FMT_YUV420P, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 643                                                 }
 644
 645                                                 if (oc->oformat->flags & AVFMT_RAWPICTURE)
 646                                                 {
 647                                                 // raw video case. The API will change slightly in the near future for that
 648                                                 ret = av_write_frame(oc, video_st->index, (uint8_t *)output, sizeof(AVPicture));
 649                                                 }
 650                                                 else
 651                                                 {
 652                                                 // Encode the image
 653                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 654
 655                                                 // If zero size, it means the image was buffered
 656                                                 if (out_size != 0)
 657                                                         {
 658                                                         // write the compressed frame in the media file
 659                                                         // XXX: in case of B frames, the pts is not yet valid
 660                                                         ret = av_write_frame( oc, video_st->index, video_outbuf, out_size );
 661                                                 }
 662                                                 }
 663                                                 frame_count++;
 664                                                 mlt_frame_close( frame );
 665                                         }
 666                                         else
 667                                         {
 668                                                 break;
 669                                         }
 670                                 }
 671                         }
 672                 }
 673         }
 674
 675     // close each codec
 676     if (video_st)
 677         close_video(oc, video_st);
 678     if (audio_st)
 679         close_audio(oc, audio_st);
 680
 681     // Write the trailer, if any
 682     av_write_trailer(oc);
 683
 684     // Free the streams
 685     for(i = 0; i < oc->nb_streams; i++)
 686         av_freep(&oc->streams[i]);
 687
 688         // Close the output file
 689     if (!(fmt->flags & AVFMT_NOFILE))
 690         url_fclose(&oc->pb);
 691
 692         // Clean up input and output frames
 693     av_free( output->data[0] );
 694     av_free( output );
 695     av_free( input->data[0] );
 696     av_free( input );
 697     av_free( video_outbuf );
 698
 699     // Free the stream
 700     av_free(oc);
 701
 702         return NULL;
 703 }
 704
 705 /** Close the consumer.
 706 */
 707
 708 static void consumer_close( mlt_consumer this )
 709 {
 710         // Stop the consumer
 711         mlt_consumer_stop( this );
 712
 713         // Close the parent
 714         mlt_consumer_close( this );
 715
 716         // Free the memory
 717         free( this );
 718 }