vhook/watermark.c

   1 /*
   2  * Watermark Hook
   3  * Copyright (c) 2005 Marcus Engene myfirstname(at)mylastname.se
   4  *
   5  * parameters for watermark:
   6  *  -m nbr = nbr is 0..1. 0 is the default mode, see below.
   7  *  -t nbr = nbr is six digit hex. Threshold.
   8  *  -f file = file is the watermark image filename. You must specify this!
   9  *
  10  * MODE 0:
  11  * The watermark picture works like this (assuming color intensities 0..0xff):
  12  * Per color do this:
  13  * If mask color is 0x80, no change to the original frame.
  14  * If mask color is < 0x80 the abs difference is subtracted from the frame. If
  15  * result < 0, result = 0
  16  * If mask color is > 0x80 the abs difference is added to the frame. If result
  17  * > 0xff, result = 0xff
  18  *
  19  * You can override the 0x80 level with the -t flag. E.g. if threshold is
  20  * 000000 the color value of watermark is added to the destination.
  21  *
  22  * This way a mask that is visible both in light pictures and in dark can be
  23  * made (fex by using a picture generated by Gimp and the bump map tool).
  24  *
  25  * An example watermark file is at
  26  * http://engene.se/ffmpeg_watermark.gif
  27  *
  28  * MODE 1:
  29  * Per color do this:
  30  * If mask color > threshold color then the watermark pixel is used.
  31  *
  32  * Example usage:
  33  *  ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif' -an out.mov
  34  *  ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif -m 1 -t 222222' -an out.mov
  35  *
  36  * Note that the entire vhook argument is encapsulated in ''. This
  37  * way, arguments to the vhook won't be mixed up with those for ffmpeg.
  38  *
  39  * This file is part of FFmpeg.
  40  *
  41  * FFmpeg is free software; you can redistribute it and/or
  42  * modify it under the terms of the GNU Lesser General Public
  43  * License as published by the Free Software Foundation; either
  44  * version 2.1 of the License, or (at your option) any later version.
  45  *
  46  * FFmpeg is distributed in the hope that it will be useful,
  47  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  48  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  49  * Lesser General Public License for more details.
  50  *
  51  * You should have received a copy of the GNU Lesser General Public
  52  * License along with FFmpeg; if not, write to the Free Software
  53  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  54  */
  55
  56 #include <stdlib.h>
  57 //#include <fcntl.h>
  58 #include <unistd.h>
  59 #include <stdarg.h>
  60
  61 #include "libavutil/common.h"
  62 #include "libavformat/avformat.h"
  63 #include "libavformat/framehook.h"
  64 #include "libswscale/swscale.h"
  65
  66 static int sws_flags = SWS_BICUBIC;
  67
  68 typedef struct {
  69     char            filename[2000];
  70     int             x_size;
  71     int             y_size;
  72
  73     /* get_watermark_picture() variables */
  74     AVFormatContext *pFormatCtx;
  75     const char     *p_ext;
  76     int             videoStream;
  77     int             frameFinished;
  78     AVCodecContext *pCodecCtx;
  79     AVCodec        *pCodec;
  80     AVFrame        *pFrame;
  81     AVPacket        packet;
  82     int             numBytes;
  83     uint8_t        *buffer;
  84     int             i;
  85     AVInputFormat  *file_iformat;
  86     AVStream       *st;
  87     int             is_done;
  88     AVFrame        *pFrameRGB;
  89     int             thrR;
  90     int             thrG;
  91     int             thrB;
  92     int             mode;
  93
  94     // This vhook first converts frame to RGB ...
  95     struct SwsContext *toRGB_convert_ctx;
  96     // ... then converts a watermark and applies it to the RGB frame ...
  97     struct SwsContext *watermark_convert_ctx;
  98     // ... and finally converts back frame from RGB to initial format
  99     struct SwsContext *fromRGB_convert_ctx;
 100 } ContextInfo;
 101
 102 int get_watermark_picture(ContextInfo *ci, int cleanup);
 103
 104
 105 /****************************************************************************
 106  *
 107  ****************************************************************************/
 108 void Release(void *ctx)
 109 {
 110     ContextInfo *ci;
 111     ci = (ContextInfo *) ctx;
 112
 113     if (ci) {
 114         get_watermark_picture(ci, 1);
 115         sws_freeContext(ci->toRGB_convert_ctx);
 116         sws_freeContext(ci->watermark_convert_ctx);
 117         sws_freeContext(ci->fromRGB_convert_ctx);
 118     }
 119     av_free(ctx);
 120 }
 121
 122
 123 /****************************************************************************
 124  *
 125  ****************************************************************************/
 126 int Configure(void **ctxp, int argc, char *argv[])
 127 {
 128     ContextInfo *ci;
 129     int c;
 130     int tmp = 0;
 131
 132     if (0 == (*ctxp = av_mallocz(sizeof(ContextInfo)))) return -1;
 133     ci = (ContextInfo *) *ctxp;
 134
 135     optind = 1;
 136
 137     // Struct is mallocz:ed so no need to reset.
 138     ci->thrR = 0x80;
 139     ci->thrG = 0x80;
 140     ci->thrB = 0x80;
 141
 142     while ((c = getopt(argc, argv, "f:m:t:")) > 0) {
 143         switch (c) {
 144             case 'f':
 145                 strncpy(ci->filename, optarg, 1999);
 146                 ci->filename[1999] = 0;
 147                 break;
 148             case 'm':
 149                 ci->mode = atoi(optarg);
 150                 break;
 151             case 't':
 152                 if (1 != sscanf(optarg, "%x", &tmp)) {
 153                     av_log(NULL, AV_LOG_ERROR, "Watermark: argument to -t must be a 6 digit hex number\n");
 154                     return -1;
 155                 }
 156                 ci->thrR = (tmp >> 16) & 0xff;
 157                 ci->thrG = (tmp >> 8) & 0xff;
 158                 ci->thrB = (tmp >> 0) & 0xff;
 159                 break;
 160             default:
 161                 av_log(NULL, AV_LOG_ERROR, "Watermark: Unrecognized argument '%s'\n", argv[optind]);
 162                 return -1;
 163         }
 164     }
 165
 166     //
 167     if (0 == ci->filename[0]) {
 168         av_log(NULL, AV_LOG_ERROR, "Watermark: There is no filename specified.\n");
 169         return -1;
 170     }
 171
 172     av_register_all();
 173     return get_watermark_picture(ci, 0);
 174 }
 175
 176
 177 /****************************************************************************
 178  * For mode 0 (the original one)
 179  ****************************************************************************/
 180 static void Process0(void *ctx,
 181               AVPicture *picture,
 182               enum PixelFormat pix_fmt,
 183               int src_width,
 184               int src_height,
 185               int64_t pts)
 186 {
 187     ContextInfo *ci = (ContextInfo *) ctx;
 188     char *buf = 0;
 189     AVPicture picture1;
 190     AVPicture *pict = picture;
 191
 192     AVFrame *pFrameRGB;
 193     int xm_size;
 194     int ym_size;
 195
 196     int x;
 197     int y;
 198     int offs, offsm;
 199     int mpoffs;
 200     uint32_t *p_pixel = 0;
 201     uint32_t pixel_meck;
 202     uint32_t pixel;
 203     uint32_t pixelm;
 204     int tmp;
 205     int thrR = ci->thrR;
 206     int thrG = ci->thrG;
 207     int thrB = ci->thrB;
 208
 209     if (pix_fmt != PIX_FMT_RGB32) {
 210         int size;
 211
 212         size = avpicture_get_size(PIX_FMT_RGB32, src_width, src_height);
 213         buf = av_malloc(size);
 214
 215         avpicture_fill(&picture1, buf, PIX_FMT_RGB32, src_width, src_height);
 216
 217         // if we already got a SWS context, let's realloc if is not re-useable
 218         ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
 219                                     src_width, src_height, pix_fmt,
 220                                     src_width, src_height, PIX_FMT_RGB32,
 221                                     sws_flags, NULL, NULL, NULL);
 222         if (ci->toRGB_convert_ctx == NULL) {
 223             av_log(NULL, AV_LOG_ERROR,
 224                    "Cannot initialize the toRGB conversion context\n");
 225             return;
 226         }
 227
 228 // img_convert parameters are          2 first destination, then 4 source
 229 // sws_scale   parameters are context, 4 first source,      then 2 destination
 230         sws_scale(ci->toRGB_convert_ctx,
 231                  picture->data, picture->linesize, 0, src_height,
 232                  picture1.data, picture1.linesize);
 233
 234         pict = &picture1;
 235     }
 236
 237     /* Insert filter code here */ /* ok */
 238
 239     // Get me next frame
 240     if (0 > get_watermark_picture(ci, 0)) {
 241         return;
 242     }
 243     // These are the three original static variables in the ffmpeg hack.
 244     pFrameRGB = ci->pFrameRGB;
 245     xm_size = ci->x_size;
 246     ym_size = ci->y_size;
 247
 248     // I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
 249     // According to avcodec.h PIX_FMT_RGB32 is handled in endian specific manner.
 250     for (y=0; y<src_height; y++) {
 251         offs = y * (src_width * 4);
 252         offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
 253         for (x=0; x<src_width; x++) {
 254             mpoffs = offsm + (((x * xm_size) / src_width) * 4);
 255             p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
 256             pixelm = *p_pixel;
 257             p_pixel = (uint32_t *)&((pict->data[0])[offs]);
 258             pixel = *p_pixel;
 259 //          pixelm = *((uint32_t *)&(pFrameRGB->data[mpoffs]));
 260             pixel_meck = pixel & 0xff000000;
 261
 262             // R
 263             tmp = (int)((pixel >> 16) & 0xff) + (int)((pixelm >> 16) & 0xff) - thrR;
 264             if (tmp > 255) tmp = 255;
 265             if (tmp < 0) tmp = 0;
 266             pixel_meck |= (tmp << 16) & 0xff0000;
 267             // G
 268             tmp = (int)((pixel >> 8) & 0xff) + (int)((pixelm >> 8) & 0xff) - thrG;
 269             if (tmp > 255) tmp = 255;
 270             if (tmp < 0) tmp = 0;
 271             pixel_meck |= (tmp << 8) & 0xff00;
 272             // B
 273             tmp = (int)((pixel >> 0) & 0xff) + (int)((pixelm >> 0) & 0xff) - thrB;
 274             if (tmp > 255) tmp = 255;
 275             if (tmp < 0) tmp = 0;
 276             pixel_meck |= (tmp << 0) & 0xff;
 277
 278
 279             // test:
 280             //pixel_meck = pixel & 0xff000000;
 281             //pixel_meck |= (pixelm & 0x00ffffff);
 282
 283             *p_pixel = pixel_meck;
 284
 285             offs += 4;
 286         } // foreach X
 287     } // foreach Y
 288
 289
 290
 291
 292     if (pix_fmt != PIX_FMT_RGB32) {
 293         ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
 294                                       src_width, src_height, PIX_FMT_RGB32,
 295                                       src_width, src_height, pix_fmt,
 296                                       sws_flags, NULL, NULL, NULL);
 297         if (ci->fromRGB_convert_ctx == NULL) {
 298             av_log(NULL, AV_LOG_ERROR,
 299                    "Cannot initialize the fromRGB conversion context\n");
 300             return;
 301         }
 302 // img_convert parameters are          2 first destination, then 4 source
 303 // sws_scale   parameters are context, 4 first source,      then 2 destination
 304         sws_scale(ci->fromRGB_convert_ctx,
 305                  picture1.data, picture1.linesize, 0, src_height,
 306                  picture->data, picture->linesize);
 307     }
 308
 309     av_free(buf);
 310 }
 311
 312
 313 /****************************************************************************
 314  * For mode 1 (the original one)
 315  ****************************************************************************/
 316 static void Process1(void *ctx,
 317               AVPicture *picture,
 318               enum PixelFormat pix_fmt,
 319               int src_width,
 320               int src_height,
 321               int64_t pts)
 322 {
 323     ContextInfo *ci = (ContextInfo *) ctx;
 324     char *buf = 0;
 325     AVPicture picture1;
 326     AVPicture *pict = picture;
 327
 328     AVFrame *pFrameRGB;
 329     int xm_size;
 330     int ym_size;
 331
 332     int x;
 333     int y;
 334     int offs, offsm;
 335     int mpoffs;
 336     uint32_t *p_pixel = 0;
 337     uint32_t pixel;
 338     uint32_t pixelm;
 339
 340     if (pix_fmt != PIX_FMT_RGB32) {
 341         int size;
 342
 343         size = avpicture_get_size(PIX_FMT_RGB32, src_width, src_height);
 344         buf = av_malloc(size);
 345
 346         avpicture_fill(&picture1, buf, PIX_FMT_RGB32, src_width, src_height);
 347
 348         // if we already got a SWS context, let's realloc if is not re-useable
 349         ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
 350                                     src_width, src_height, pix_fmt,
 351                                     src_width, src_height, PIX_FMT_RGB32,
 352                                     sws_flags, NULL, NULL, NULL);
 353         if (ci->toRGB_convert_ctx == NULL) {
 354             av_log(NULL, AV_LOG_ERROR,
 355                    "Cannot initialize the toRGB conversion context\n");
 356             return;
 357         }
 358
 359 // img_convert parameters are          2 first destination, then 4 source
 360 // sws_scale   parameters are context, 4 first source,      then 2 destination
 361         sws_scale(ci->toRGB_convert_ctx,
 362                  picture->data, picture->linesize, 0, src_height,
 363                  picture1.data, picture1.linesize);
 364
 365         pict = &picture1;
 366     }
 367
 368     /* Insert filter code here */ /* ok */
 369
 370     // Get me next frame
 371     if (0 > get_watermark_picture(ci, 0)) {
 372         return;
 373     }
 374     // These are the three original static variables in the ffmpeg hack.
 375     pFrameRGB = ci->pFrameRGB;
 376     xm_size = ci->x_size;
 377     ym_size = ci->y_size;
 378
 379     // I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
 380     // According to avcodec.h PIX_FMT_RGB32 is handled in endian specific manner.
 381     for (y=0; y<src_height; y++) {
 382         offs = y * (src_width * 4);
 383         offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
 384         for (x=0; x<src_width; x++) {
 385             mpoffs = offsm + (((x * xm_size) / src_width) * 4);
 386             p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
 387             pixelm = *p_pixel; /* watermark pixel */
 388             p_pixel = (uint32_t *)&((pict->data[0])[offs]);
 389             pixel = *p_pixel;
 390
 391             if (((pixelm >> 16) & 0xff) > ci->thrR ||
 392                 ((pixelm >>  8) & 0xff) > ci->thrG ||
 393                 ((pixelm >>  0) & 0xff) > ci->thrB)
 394             {
 395                 *p_pixel = pixelm;
 396             } else {
 397                 *p_pixel = pixel;
 398             }
 399             offs += 4;
 400         } // foreach X
 401     } // foreach Y
 402
 403     if (pix_fmt != PIX_FMT_RGB32) {
 404         ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
 405                                       src_width, src_height, PIX_FMT_RGB32,
 406                                       src_width, src_height, pix_fmt,
 407                                       sws_flags, NULL, NULL, NULL);
 408         if (ci->fromRGB_convert_ctx == NULL) {
 409             av_log(NULL, AV_LOG_ERROR,
 410                    "Cannot initialize the fromRGB conversion context\n");
 411             return;
 412         }
 413 // img_convert parameters are          2 first destination, then 4 source
 414 // sws_scale   parameters are context, 4 first source,      then 2 destination
 415         sws_scale(ci->fromRGB_convert_ctx,
 416                  picture1.data, picture1.linesize, 0, src_height,
 417                  picture->data, picture->linesize);
 418     }
 419
 420     av_free(buf);
 421 }
 422
 423
 424 /****************************************************************************
 425  * This is the function ffmpeg.c callbacks.
 426  ****************************************************************************/
 427 void Process(void *ctx,
 428              AVPicture *picture,
 429              enum PixelFormat pix_fmt,
 430              int src_width,
 431              int src_height,
 432              int64_t pts)
 433 {
 434     ContextInfo *ci = (ContextInfo *) ctx;
 435     if (1 == ci->mode) {
 436         Process1(ctx, picture, pix_fmt, src_width, src_height, pts);
 437     } else {
 438         Process0(ctx, picture, pix_fmt, src_width, src_height, pts);
 439     }
 440 }
 441
 442
 443 /****************************************************************************
 444  * When cleanup == 0, we try to get the next frame. If no next frame, nothing
 445  * is done.
 446  *
 447  * This code follows the example on
 448  * http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
 449  *
 450  * 0 = ok, -1 = error
 451  ****************************************************************************/
 452 int get_watermark_picture(ContextInfo *ci, int cleanup)
 453 {
 454     if (1 == ci->is_done && 0 == cleanup) return 0;
 455
 456     // Yes, *pFrameRGB arguments must be null the first time otherwise it's not good..
 457     // This block is only executed the first time we enter this function.
 458     if (0 == ci->pFrameRGB &&
 459         0 == cleanup)
 460     {
 461
 462         /*
 463          * The last three parameters specify the file format, buffer size and format
 464          * parameters; by simply specifying NULL or 0 we ask libavformat to auto-detect
 465          * the format and use a default buffer size. (Didn't work!)
 466          */
 467         if (av_open_input_file(&ci->pFormatCtx, ci->filename, NULL, 0, NULL) != 0) {
 468
 469             // Martin says this should not be necessary but it failed for me sending in
 470             // NULL instead of file_iformat to av_open_input_file()
 471             ci->i = strlen(ci->filename);
 472             if (0 == ci->i) {
 473                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() No filename to watermark vhook\n");
 474                 return -1;
 475             }
 476             while (ci->i > 0) {
 477                 if (ci->filename[ci->i] == '.') {
 478                     ci->i++;
 479                     break;
 480                 }
 481                 ci->i--;
 482             }
 483                ci->p_ext = &(ci->filename[ci->i]);
 484             ci->file_iformat = av_find_input_format (ci->p_ext);
 485             if (0 == ci->file_iformat) {
 486                 av_log(NULL, AV_LOG_INFO, "get_watermark_picture() attempt to use image2 for [%s]\n", ci->p_ext);
 487                 ci->file_iformat = av_find_input_format ("image2");
 488             }
 489             if (0 == ci->file_iformat) {
 490                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Really failed to find iformat [%s]\n", ci->p_ext);
 491                 return -1;
 492             }
 493             // now continues the Martin template.
 494
 495             if (av_open_input_file(&ci->pFormatCtx, ci->filename, ci->file_iformat, 0, NULL)!=0) {
 496                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open input file [%s]\n", ci->filename);
 497                 return -1;
 498             }
 499         }
 500
 501         /*
 502          * This fills the streams field of the AVFormatContext with valid information.
 503          */
 504         if(av_find_stream_info(ci->pFormatCtx)<0) {
 505             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find stream info\n");
 506             return -1;
 507         }
 508
 509         /*
 510          * As mentioned in the introduction, we'll handle only video streams, not audio
 511          * streams. To make things nice and easy, we simply use the first video stream we
 512          * find.
 513          */
 514         ci->videoStream=-1;
 515         for(ci->i = 0; ci->i < ci->pFormatCtx->nb_streams; ci->i++)
 516             if(ci->pFormatCtx->streams[ci->i]->codec->codec_type==CODEC_TYPE_VIDEO)
 517             {
 518                 ci->videoStream = ci->i;
 519                 break;
 520             }
 521         if(ci->videoStream == -1) {
 522             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any video stream\n");
 523             return -1;
 524         }
 525
 526         ci->st = ci->pFormatCtx->streams[ci->videoStream];
 527         ci->x_size = ci->st->codec->width;
 528         ci->y_size = ci->st->codec->height;
 529
 530         // Get a pointer to the codec context for the video stream
 531         ci->pCodecCtx = ci->pFormatCtx->streams[ci->videoStream]->codec;
 532
 533
 534         /*
 535          * OK, so now we've got a pointer to the so-called codec context for our video
 536          * stream, but we still have to find the actual codec and open it.
 537          */
 538         // Find the decoder for the video stream
 539         ci->pCodec = avcodec_find_decoder(ci->pCodecCtx->codec_id);
 540         if(ci->pCodec == NULL) {
 541             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any codec\n");
 542             return -1;
 543         }
 544
 545
 546         // Open codec
 547         if(avcodec_open(ci->pCodecCtx, ci->pCodec)<0) {
 548             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open codec\n");
 549             return -1;
 550         }
 551
 552         // Hack to correct wrong frame rates that seem to be generated by some
 553         // codecs
 554         if (ci->pCodecCtx->time_base.den>1000 && ci->pCodecCtx->time_base.num==1)
 555             ci->pCodecCtx->time_base.num=1000;
 556
 557         /*
 558          * Allocate a video frame to store the decoded images in.
 559          */
 560         ci->pFrame = avcodec_alloc_frame();
 561
 562
 563         /*
 564          * The RGB image pFrameRGB (of type AVFrame *) is allocated like this:
 565          */
 566         // Allocate an AVFrame structure
 567         ci->pFrameRGB=avcodec_alloc_frame();
 568         if(ci->pFrameRGB==NULL) {
 569             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to alloc pFrameRGB\n");
 570             return -1;
 571         }
 572
 573         // Determine required buffer size and allocate buffer
 574         ci->numBytes = avpicture_get_size(PIX_FMT_RGB32, ci->pCodecCtx->width,
 575             ci->pCodecCtx->height);
 576         ci->buffer = av_malloc(ci->numBytes);
 577
 578         // Assign appropriate parts of buffer to image planes in pFrameRGB
 579         avpicture_fill((AVPicture *)ci->pFrameRGB, ci->buffer, PIX_FMT_RGB32,
 580             ci->pCodecCtx->width, ci->pCodecCtx->height);
 581     }
 582     // TODO loop, pingpong etc?
 583     if (0 == cleanup)
 584     {
 585 //        av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Get a frame\n");
 586         while(av_read_frame(ci->pFormatCtx, &ci->packet)>=0)
 587         {
 588             // Is this a packet from the video stream?
 589             if(ci->packet.stream_index == ci->videoStream)
 590             {
 591                 // Decode video frame
 592                 avcodec_decode_video(ci->pCodecCtx, ci->pFrame, &ci->frameFinished,
 593                     ci->packet.data, ci->packet.size);
 594
 595                 // Did we get a video frame?
 596                 if(ci->frameFinished)
 597                 {
 598                     // Convert the image from its native format to RGB32
 599                     ci->watermark_convert_ctx =
 600                         sws_getCachedContext(ci->watermark_convert_ctx,
 601                             ci->pCodecCtx->width, ci->pCodecCtx->height, ci->pCodecCtx->pix_fmt,
 602                             ci->pCodecCtx->width, ci->pCodecCtx->height, PIX_FMT_RGB32,
 603                             sws_flags, NULL, NULL, NULL);
 604                     if (ci->watermark_convert_ctx == NULL) {
 605                         av_log(NULL, AV_LOG_ERROR,
 606                               "Cannot initialize the watermark conversion context\n");
 607                         return -1;
 608                     }
 609 // img_convert parameters are          2 first destination, then 4 source
 610 // sws_scale   parameters are context, 4 first source,      then 2 destination
 611                     sws_scale(ci->watermark_convert_ctx,
 612                              ci->pFrame->data, ci->pFrame->linesize, 0, ci->pCodecCtx->height,
 613                              ci->pFrameRGB->data, ci->pFrameRGB->linesize);
 614
 615                     // Process the video frame (save to disk etc.)
 616                     //fprintf(stderr,"banan() New frame!\n");
 617                     //DoSomethingWithTheImage(ci->pFrameRGB);
 618                     return 0;
 619                 }
 620             }
 621
 622             // Free the packet that was allocated by av_read_frame
 623             av_free_packet(&ci->packet);
 624         }
 625         ci->is_done = 1;
 626         return 0;
 627     } // if 0 != cleanup
 628
 629     if (0 != cleanup)
 630     {
 631         // Free the RGB image
 632         av_freep(&ci->buffer);
 633         av_freep(&ci->pFrameRGB);
 634
 635         // Close the codec
 636         if (0 != ci->pCodecCtx) {
 637             avcodec_close(ci->pCodecCtx);
 638             ci->pCodecCtx = 0;
 639         }
 640
 641         // Close the video file
 642         if (0 != ci->pFormatCtx) {
 643             av_close_input_file(ci->pFormatCtx);
 644             ci->pFormatCtx = 0;
 645         }
 646
 647         ci->is_done = 0;
 648     }
 649     return 0;
 650 }
 651
 652
 653 void parse_arg_file(const char *filename)
 654 {
 655 }