gtk2_ardour/transcode_ffmpeg.cc

   1 /*
   2     Copyright (C) 2010-2013 Paul Davis
   3     Author: Robin Gareus <robin@gareus.org>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <sstream>
  23 #include <sys/types.h>
  24
  25 #include "pbd/error.h"
  26 #include "pbd/convert.h"
  27 #include "pbd/file_utils.h"
  28 #include "gui_thread.h"
  29
  30 #include "transcode_ffmpeg.h"
  31 #include "utils_videotl.h"
  32 #include "video_tool_paths.h"
  33
  34 #include "i18n.h"
  35
  36 using namespace PBD;
  37 using namespace VideoUtils;
  38
  39 TranscodeFfmpeg::TranscodeFfmpeg (std::string f)
  40         : infile(f)
  41 {
  42         probeok = false;
  43         ffexecok = false;
  44         m_duration = 0;
  45         m_avoffset = m_lead_in = m_lead_out = 0;
  46         m_width = m_height = 0;
  47         m_aspect = m_fps = 0;
  48         m_sar = "";
  49 #if 1 /* tentative debug mode */
  50         debug_enable = false;
  51 #endif
  52
  53         if (!ArdourVideoToolPaths::transcoder_exe(ffmpeg_exe, ffprobe_exe)) {
  54                 warning << string_compose(
  55                                 _(
  56                                         "No ffprobe or ffmpeg executables could be found on this system.\n"
  57                                         "Video import and export is not possible until you install those tools.\n"
  58                                         "%1 requires ffmpeg and ffprobe from ffmpeg.org - version 1.1 or newer.\n"
  59                                         "\n"
  60                                         "The tools are included with the %1 releases from ardour.org "
  61                                         "and also available with the video-server at http://x42.github.com/harvid/\n"
  62                                         "\n"
  63                                         "Important: the files need to be installed in $PATH and named ffmpeg_harvid and ffprobe_harvid.\n"
  64                                         "If you already have a suitable ffmpeg installation on your system, we recommend creating "
  65                                         "symbolic links from ffmpeg to ffmpeg_harvid and from ffprobe to ffprobe_harvid.\n"
  66                                         "\n"
  67                                         "see also http://manual.ardour.org/video-timeline/setup/"
  68                                  ), PROGRAM_NAME) << endmsg;
  69                 return;
  70         }
  71         ffexecok = true;
  72
  73         if (infile.empty() || !probe()) {
  74                 return;
  75         }
  76         probeok = true;
  77 }
  78
  79 TranscodeFfmpeg::~TranscodeFfmpeg ()
  80 {
  81   ;
  82 }
  83
  84 bool
  85 TranscodeFfmpeg::probe ()
  86 {
  87         ffoutput = "";
  88         char **argp;
  89         argp=(char**) calloc(7,sizeof(char*));
  90         argp[0] = strdup(ffprobe_exe.c_str());
  91         argp[1] = strdup("-print_format");
  92         argp[2] = strdup("csv=nk=0");
  93         argp[3] = strdup("-show_format");
  94         argp[4] = strdup("-show_streams");
  95         argp[5] = strdup(infile.c_str());
  96         argp[6] = 0;
  97         ffcmd = new ARDOUR::SystemExec(ffprobe_exe, argp);
  98         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffprobeparse, this, _1 ,_2));
  99         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 100         if (ffcmd->start(1)) {
 101                 ffexit();
 102                 return false;
 103         }
 104
 105         /* wait for ffprobe process to exit */
 106         ffcmd->wait();
 107
 108         /* wait for interposer thread to copy all data.
 109          * SystemExec::Terminated is emitted and ffcmd set to NULL */
 110         int timeout = 300; // 1.5 sec
 111         while (ffcmd && --timeout > 0) {
 112                 Glib::usleep(5000);
 113         }
 114         if (timeout == 0 || ffoutput.empty()) {
 115                 return false;
 116         }
 117
 118         /* parse */
 119
 120         std::vector<std::vector<std::string> > lines;
 121         ParseCSV(ffoutput, lines);
 122         double timebase = 0;
 123         m_width = m_height = 0;
 124         m_fps = m_aspect = 0;
 125         m_duration = 0;
 126         m_sar.clear();
 127         m_codec.clear();
 128         m_audio.clear();
 129
 130 #define PARSE_FRACTIONAL_FPS(VAR) \
 131         { \
 132                 std::string::size_type pos; \
 133                 VAR = atof(value); \
 134                 pos = value.find_first_of('/'); \
 135                 if (pos != std::string::npos) { \
 136                         VAR = atof(value.substr(0, pos)) / atof(value.substr(pos+1)); \
 137                 } \
 138         }
 139
 140         for (std::vector<std::vector<std::string> >::iterator i = lines.begin(); i != lines.end(); ++i) {
 141                 if (i->at(0) == X_("format")) {
 142                         /* format,filename,#streams,format-name,format-long-name,start-time,duration,size,bitrate */
 143                 } else
 144                 if (i->at(0) == X_("stream")) {
 145                         if (i->at(5) == X_("codec_type=video") && m_width == 0) {
 146
 147                                 for (std::vector<std::string>::iterator kv = i->begin(); kv != i->end(); ++kv) {
 148                                         const size_t kvsep = kv->find('=');
 149                                         if(kvsep == std::string::npos) continue;
 150                                         std::string key = kv->substr(0, kvsep);
 151                                         std::string value = kv->substr(kvsep + 1);
 152
 153                                         if (key == X_("index")) {
 154                                                 m_videoidx = atoi(value);
 155                                         } else if (key == X_("width")) {
 156                                                 m_width = atoi(value);
 157                                         } else if (key == X_("height")) {
 158                                                 m_height = atoi(value);
 159                                         } else if (key == X_("codec_name")) {
 160                                                 if (!m_codec.empty()) m_codec += " ";
 161                                                 m_codec += value;
 162                                         } else if (key == X_("codec_long_name")) {
 163                                                 if (!m_codec.empty()) m_codec += " ";
 164                                                 m_codec += "[" + value + "]";
 165                                         } else if (key == X_("codec_tag_string")) {
 166                                                 if (!m_codec.empty()) m_codec += " ";
 167                                                 m_codec += "(" + value + ")";
 168                                         } else if (key == X_("r_frame_rate")) {
 169                                                 PARSE_FRACTIONAL_FPS(m_fps)
 170                                         } else if (key == X_("avg_frame_rate") && m_fps == 0) {
 171                                                 PARSE_FRACTIONAL_FPS(m_fps)
 172                                         } else if (key == X_("time_base")) {
 173                                                 PARSE_FRACTIONAL_FPS(timebase)
 174                                         } else if (key == X_("timecode") && m_duration == 0) {
 175                                                 int h,m,s; char f[7];
 176                                                 if (sscanf(i->at(16).c_str(), "%d:%d:%d:%s",&h,&m,&s,f) == 4) {
 177                                                         m_duration = (ARDOUR::framecnt_t) floor(m_fps * (
 178                                                                         h * 3600.0
 179                                                                 + m * 60.0
 180                                                                 + s * 1.0
 181                                                                 + atoi(f) / pow((double)10, (int)strlen(f))
 182                                                         ));
 183                                                 }
 184                                         } else if (key == X_("duration_ts") && m_fps == 0 && timebase !=0 ) {
 185                                                 m_duration = atof(value) * m_fps * timebase;
 186                                         } else if (key == X_("duration") && m_fps != 0 && m_duration == 0) {
 187                                                 m_duration = atof(value) * m_fps;
 188                                         } else if (key == X_("sample_aspect_ratio")) {
 189                                                 std::string::size_type pos;
 190                                                 pos = value.find_first_of(':');
 191                                                 if (pos != std::string::npos && atof(value.substr(pos+1)) != 0) {
 192                                                         m_sar = value;
 193                                                         m_sar.replace(pos, 1, "/");
 194                                                 }
 195                                         } else if (key == X_("display_aspect_ratio")) {
 196                                                 std::string::size_type pos;
 197                                                 pos = value.find_first_of(':');
 198                                                 if (pos != std::string::npos && atof(value.substr(pos+1)) != 0) {
 199                                                         m_aspect = atof(value.substr(0, pos)) / atof(value.substr(pos+1));
 200                                                 }
 201                                         }
 202                                 }
 203
 204                                 if (m_aspect == 0) {
 205                                         m_aspect = (double)m_width / (double)m_height;
 206                                 }
 207
 208                         } else if (i->at(5) == X_("codec_type=audio")) { /* new ffprobe */
 209                                 FFAudioStream as;
 210                                 for (std::vector<std::string>::iterator kv = i->begin(); kv != i->end(); ++kv) {
 211                                         const size_t kvsep = kv->find('=');
 212                                         if(kvsep == std::string::npos) continue;
 213                                         std::string key = kv->substr(0, kvsep);
 214                                         std::string value = kv->substr(kvsep + 1);
 215
 216                                         if (key == X_("channels")) {
 217                                                 as.channels   = atoi(value);
 218                                         } else if (key == X_("index")) {
 219                                                 as.stream_id  = value;
 220                                         } else if (key == X_("codec_long_name")) {
 221                                                 if (!as.name.empty()) as.name += " ";
 222                                                 as.name += value;
 223                                         } else if (key == X_("codec_name")) {
 224                                                 if (!as.name.empty()) as.name += " ";
 225                                                 as.name += value;
 226                                         } else if (key == X_("sample_fmt")) {
 227                                                 if (!as.name.empty()) as.name += " ";
 228                                                 as.name += "FMT:" + value;
 229                                         } else if (key == X_("sample_rate")) {
 230                                                 if (!as.name.empty()) as.name += " ";
 231                                                 as.name += "SR:" + value;
 232                                         }
 233
 234                                 }
 235                                 m_audio.push_back(as);
 236                         }
 237                 }
 238         }
 239         /* end parse */
 240
 241 #if 0 /* DEBUG */
 242         printf("FPS: %f\n", m_fps);
 243         printf("Duration: %lu frames\n",(unsigned long)m_duration);
 244         printf("W/H: %ix%i\n",m_width, m_height);
 245         printf("aspect: %f\n",m_aspect);
 246         printf("codec: %s\n",m_codec.c_str());
 247         if (m_audio.size() > 0) {
 248                 for (AudioStreams::iterator it = m_audio.begin(); it < m_audio.end(); ++it) {
 249                         printf("audio: %s - %i channels\n",(*it).stream_id.c_str(), (*it).channels);
 250                 }
 251         } else {
 252           printf("audio: no audio streams in file.\n");
 253         }
 254 #endif
 255
 256         return true;
 257 }
 258
 259 TranscodeFfmpeg::FFSettings
 260 TranscodeFfmpeg::default_encoder_settings ()
 261 {
 262         TranscodeFfmpeg::FFSettings ffs;
 263         ffs.clear();
 264         ffs["-vcodec"] = "mpeg4";
 265         ffs["-acodec"] = "ac3";
 266         ffs["-b:v"] = "5000k";
 267         ffs["-b:a"] = "160k";
 268         return ffs;
 269 }
 270
 271 TranscodeFfmpeg::FFSettings
 272 TranscodeFfmpeg::default_meta_data ()
 273 {
 274         TranscodeFfmpeg::FFSettings ffm;
 275         ffm.clear();
 276         ffm["comment"] = "Created with " PROGRAM_NAME;
 277         return ffm;
 278 }
 279
 280 char *
 281 TranscodeFfmpeg::format_metadata (std::string key, std::string value)
 282 {
 283         size_t start_pos = 0;
 284         std::string v1 = value;
 285         while((start_pos = v1.find_first_not_of(
 286                         "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789(),.\"'",
 287                         start_pos)) != std::string::npos)
 288         {
 289                 v1.replace(start_pos, 1, "_");
 290                 start_pos += 1;
 291         }
 292
 293         start_pos = 0;
 294         while((start_pos = v1.find("\"", start_pos)) != std::string::npos) {
 295                 v1.replace(start_pos, 1, "\\\"");
 296                 start_pos += 2;
 297         }
 298
 299         size_t len = key.length() + v1.length() + 4;
 300         char *mds = (char*) calloc(len, sizeof(char));
 301         snprintf(mds, len, "%s=\"%s\"", key.c_str(), v1.c_str());
 302         return mds;
 303 }
 304
 305 bool
 306 TranscodeFfmpeg::encode (std::string outfile, std::string inf_a, std::string inf_v, TranscodeFfmpeg::FFSettings ffs, TranscodeFfmpeg::FFSettings meta, bool map)
 307 {
 308 #define MAX_FFMPEG_ENCODER_ARGS (100)
 309         char **argp;
 310         int a=0;
 311
 312         argp=(char**) calloc(MAX_FFMPEG_ENCODER_ARGS,sizeof(char*));
 313         argp[a++] = strdup(ffmpeg_exe.c_str());
 314         if (m_avoffset < 0 || m_avoffset > 0) {
 315                 std::ostringstream osstream; osstream << m_avoffset;
 316                 argp[a++] = strdup("-itsoffset");
 317                 argp[a++] = strdup(osstream.str().c_str());
 318         }
 319         argp[a++] = strdup("-i");
 320         argp[a++] = strdup(inf_v.c_str());
 321
 322         argp[a++] = strdup("-i");
 323         argp[a++] = strdup(inf_a.c_str());
 324
 325         for(TranscodeFfmpeg::FFSettings::const_iterator it = ffs.begin(); it != ffs.end(); ++it) {
 326                 argp[a++] = strdup(it->first.c_str());
 327                 argp[a++] = strdup(it->second.c_str());
 328         }
 329         for(TranscodeFfmpeg::FFSettings::const_iterator it = meta.begin(); it != meta.end(); ++it) {
 330                 argp[a++] = strdup("-metadata");
 331                 argp[a++] = format_metadata(it->first.c_str(), it->second.c_str());
 332         }
 333
 334         if (m_fps > 0) {
 335                 m_lead_in  = rint (m_lead_in * m_fps) / m_fps;
 336                 m_lead_out = rint (m_lead_out * m_fps) / m_fps;
 337         }
 338
 339         if (m_lead_in != 0 && m_lead_out != 0) {
 340                 std::ostringstream osstream;
 341                 argp[a++] = strdup("-vf");
 342                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_in;
 343                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 344                 osstream << X_(" [pre]; ");
 345                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_out;
 346                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 347                 osstream << X_(" [post]; ");
 348                 osstream << X_("[pre] [in] [post] concat=n=3");
 349                 argp[a++] = strdup(osstream.str().c_str());
 350         } else if (m_lead_in != 0) {
 351                 std::ostringstream osstream;
 352                 argp[a++] = strdup("-vf");
 353                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_in;
 354                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 355                 osstream << X_(" [pre]; ");
 356                 osstream << X_("[pre] [in] concat=n=2");
 357                 argp[a++] = strdup(osstream.str().c_str());
 358         } else if (m_lead_out != 0) {
 359                 std::ostringstream osstream;
 360                 argp[a++] = strdup("-vf");
 361                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_out;
 362                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 363                 osstream << X_(" [post]; ");
 364                 osstream << X_("[in] [post] concat=n=2");
 365                 argp[a++] = strdup(osstream.str().c_str());
 366         }
 367
 368         if (map) {
 369                 std::ostringstream osstream;
 370                 argp[a++] = strdup("-map");
 371                 osstream << X_("0:") << m_videoidx;
 372                 argp[a++] = strdup(osstream.str().c_str());
 373                 argp[a++] = strdup("-map");
 374                 argp[a++] = strdup("1:0");
 375         }
 376
 377         argp[a++] = strdup("-y");
 378         argp[a++] = strdup(outfile.c_str());
 379         argp[a] = (char *)0;
 380         assert(a<MAX_FFMPEG_ENCODER_ARGS);
 381         /* Note: these are free()d in ~SystemExec */
 382 #if 1 /* DEBUG */
 383         if (debug_enable) { /* tentative debug mode */
 384         printf("EXPORT ENCODE:\n");
 385         for (int i=0; i< a; ++i) {
 386           printf("%s ", argp[i]);
 387         }
 388         printf("\n");
 389         }
 390 #endif
 391
 392         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 393         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_v, this, _1 ,_2));
 394         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 395         if (ffcmd->start(2)) {
 396                 ffexit();
 397                 return false;
 398         }
 399         return true;
 400 }
 401
 402 bool
 403 TranscodeFfmpeg::extract_audio (std::string outfile, ARDOUR::framecnt_t /*samplerate*/, unsigned int stream)
 404 {
 405         if (!probeok) return false;
 406   if (stream >= m_audio.size()) return false;
 407
 408         char **argp;
 409         int i = 0;
 410
 411         argp=(char**) calloc(15,sizeof(char*));
 412         argp[i++] = strdup(ffmpeg_exe.c_str());
 413         argp[i++] = strdup("-i");
 414         argp[i++] = strdup(infile.c_str());
 415 #if 0 /* ffmpeg write original samplerate, use a3/SRC to resample */
 416         argp[i++] = strdup("-ar");
 417         argp[i] = (char*) calloc(7,sizeof(char)); snprintf(argp[i++], 7, "%"PRId64, samplerate);
 418 #endif
 419         argp[i++] = strdup("-ac");
 420         argp[i] = (char*) calloc(3,sizeof(char)); snprintf(argp[i++], 3, "%i", m_audio.at(stream).channels);
 421         argp[i++] = strdup("-map");
 422         argp[i] = (char*) calloc(8,sizeof(char)); snprintf(argp[i++], 8, "0:%s", m_audio.at(stream).stream_id.c_str());
 423         argp[i++] = strdup("-vn");
 424         argp[i++] = strdup("-acodec");
 425         argp[i++] = strdup("pcm_f32le");
 426         argp[i++] = strdup("-y");
 427         argp[i++] = strdup(outfile.c_str());
 428         argp[i++] = (char *)0;
 429         /* Note: argp is free()d in ~SystemExec */
 430 #if 1 /* DEBUG */
 431         if (debug_enable) { /* tentative debug mode */
 432         printf("EXTRACT AUDIO:\n");
 433         for (int i=0; i< 14; ++i) {
 434           printf("%s ", argp[i]);
 435         }
 436         printf("\n");
 437         }
 438 #endif
 439
 440         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 441         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_a, this, _1 ,_2));
 442         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 443         if (ffcmd->start(2)) {
 444                 ffexit();
 445                 return false;
 446         }
 447         return true;
 448 }
 449
 450
 451 bool
 452 TranscodeFfmpeg::transcode (std::string outfile, const int outw, const int outh, const int kbitps)
 453 {
 454         if (!probeok) return false;
 455
 456         char **argp;
 457         int bitrate = kbitps;
 458         int width = outw;
 459         int height = outh;
 460
 461         if (width < 1 || width > m_width) { width = m_width; } /* don't allow upscaling */
 462         if (height < 1 || height > m_height) { height = floor(width / m_aspect); }
 463
 464         if (bitrate == 0) {
 465                 const double bitperpixel = .7; /* avg quality */
 466                 bitrate = floor(m_fps * width * height * bitperpixel / 10000.0);
 467         } else {
 468                 bitrate = bitrate / 10;
 469         }
 470         if (bitrate < 10)  bitrate = 10;
 471         if (bitrate > 1000) bitrate = 1000;
 472
 473         argp=(char**) calloc(15,sizeof(char*));
 474         argp[0] = strdup(ffmpeg_exe.c_str());
 475         argp[1] = strdup("-i");
 476         argp[2] = strdup(infile.c_str());
 477         argp[3] = strdup("-b:v");
 478         argp[4] = (char*) calloc(7,sizeof(char)); snprintf(argp[4], 7, "%i0k", bitrate);
 479         argp[5] = strdup("-s");
 480         argp[6] = (char*) calloc(10,sizeof(char)); snprintf(argp[6], 10, "%ix%i", width, height);
 481         argp[7] = strdup("-y");
 482         argp[8] = strdup("-vcodec");
 483         argp[9] = strdup("mpeg4");
 484         argp[10] = strdup("-an");
 485         argp[11] = strdup("-keyint_min");
 486         argp[12] = strdup("10");
 487         argp[13] = strdup(outfile.c_str());
 488         argp[14] = (char *)0;
 489         /* Note: these are free()d in ~SystemExec */
 490 #if 1 /* DEBUG */
 491         if (debug_enable) { /* tentative debug mode */
 492         printf("TRANSCODE VIDEO:\n");
 493         for (int i=0; i< 14; ++i) {
 494           printf("%s ", argp[i]);
 495         }
 496         printf("\n");
 497         }
 498 #endif
 499         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 500         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_v, this, _1 ,_2));
 501         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 502         if (ffcmd->start(2)) {
 503                 ffexit();
 504                 return false;
 505         }
 506         return true;
 507 }
 508
 509 void
 510 TranscodeFfmpeg::cancel ()
 511 {
 512         if (!ffcmd || !ffcmd->is_running()) { return;}
 513         ffcmd->write_to_stdin("q");
 514 #ifdef PLATFORM_WINDOWS
 515         Sleep(1000);
 516 #else
 517         sleep (1);
 518 #endif
 519         if (ffcmd) {
 520           ffcmd->terminate();
 521         }
 522 }
 523
 524 void
 525 TranscodeFfmpeg::ffexit ()
 526 {
 527         delete ffcmd;
 528         ffcmd=0;
 529         Finished(); /* EMIT SIGNAL */
 530 }
 531
 532 void
 533 TranscodeFfmpeg::ffprobeparse (std::string d, size_t /* s */)
 534 {
 535         ffoutput+=d;
 536 }
 537
 538 void
 539 TranscodeFfmpeg::ffmpegparse_a (std::string d, size_t /* s */)
 540 {
 541         const char *t;
 542         int h,m,s; char f[7];
 543         ARDOUR::framecnt_t p = -1;
 544
 545         if (!(t=strstr(d.c_str(), "time="))) { return; }
 546
 547         if (sscanf(t+5, "%d:%d:%d.%s",&h,&m,&s,f) == 4) {
 548                 p = (ARDOUR::framecnt_t) floor( 100.0 * (
 549                       h * 3600.0
 550                     + m * 60.0
 551                     + s * 1.0
 552                     + atoi(f) / pow((double)10, (int)strlen(f))
 553                 ));
 554                 p = p * m_fps / 100.0;
 555                 if (p > m_duration ) { p = m_duration; }
 556                 Progress(p, m_duration); /* EMIT SIGNAL */
 557         } else {
 558                 Progress(0, 0); /* EMIT SIGNAL */
 559         }
 560 }
 561
 562 void
 563 TranscodeFfmpeg::ffmpegparse_v (std::string d, size_t /* s */)
 564 {
 565         if (strstr(d.c_str(), "ERROR") || strstr(d.c_str(), "Error") || strstr(d.c_str(), "error")) {
 566                 warning << "ffmpeg-error: " << d << endmsg;
 567         }
 568         if (strncmp(d.c_str(), "frame=",6)) {
 569 #if 1 /* DEBUG */
 570                 if (debug_enable) {
 571                         d.erase(d.find_last_not_of(" \t\r\n") + 1);
 572                   printf("ffmpeg: '%s'\n", d.c_str());
 573                 }
 574 #endif
 575                 Progress(0, 0); /* EMIT SIGNAL */
 576                 return;
 577         }
 578         ARDOUR::framecnt_t f = atol(d.substr(6));
 579         if (f == 0) {
 580                 Progress(0, 0); /* EMIT SIGNAL */
 581         } else {
 582                 Progress(f, m_duration); /* EMIT SIGNAL */
 583         }
 584 }