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