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 using namespace VideoUtils;
  37
  38 TranscodeFfmpeg::TranscodeFfmpeg (std::string f)
  39         : infile(f)
  40 {
  41         probeok = false;
  42         ffexecok = false;
  43         ffmpeg_exe = "";
  44         ffprobe_exe = "";
  45         m_duration = 0;
  46         m_avoffset = m_lead_in = m_lead_out = 0;
  47         m_width = m_height = 0;
  48         m_aspect = m_fps = 0;
  49         m_sar = "";
  50 #if 1 /* tentative debug mode */
  51         debug_enable = false;
  52 #endif
  53
  54         std::string ff_file_path;
  55         if (find_file_in_search_path (Searchpath(Glib::getenv("PATH")), X_("ffmpeg_harvid"), ff_file_path)) { ffmpeg_exe = ff_file_path; }
  56         else if (Glib::file_test(X_("C:\\Program Files\\harvid\\ffmpeg.exe"), Glib::FILE_TEST_EXISTS)) {
  57                 ffmpeg_exe = X_("C:\\Program Files\\ffmpeg\\ffmpeg.exe");
  58         }
  59         else if (Glib::file_test(X_("C:\\Program Files\\ffmpeg\\ffmpeg.exe"), Glib::FILE_TEST_EXISTS)) {
  60                 ffmpeg_exe = X_("C:\\Program Files\\ffmpeg\\ffmpeg.exe");
  61         }
  62
  63         if (find_file_in_search_path (Searchpath(Glib::getenv("PATH")), X_("ffprobe_harvid"), ff_file_path)) { ffprobe_exe = ff_file_path; }
  64         else if (Glib::file_test(X_("C:\\Program Files\\harvid\\ffprobe.exe"), Glib::FILE_TEST_EXISTS)) {
  65                 ffprobe_exe = X_("C:\\Program Files\\ffmpeg\\ffprobe.exe");
  66         }
  67         else if (Glib::file_test(X_("C:\\Program Files\\ffmpeg\\ffprobe.exe"), Glib::FILE_TEST_EXISTS)) {
  68                 ffprobe_exe = X_("C:\\Program Files\\ffmpeg\\ffprobe.exe");
  69         }
  70
  71         if (ffmpeg_exe.empty() || ffprobe_exe.empty()) {
  72                 warning << string_compose(
  73                                 _(
  74                                 "No ffprobe or ffmpeg executables could be found on this system.\n"
  75                                 "Video import and export is not possible until you install those tools.\n"
  76                                 "%1 requires ffmpeg and ffprobe from ffmpeg.org - version 1.1 or newer.\n"
  77                                 "\n"
  78                                 "The tools are included with the %1 releases from ardour.org "
  79                                 "and also available with the video-server at http://x42.github.com/harvid/\n"
  80                                 "\n"
  81                                 "Important: the files need to be installed in $PATH and named ffmpeg_harvid and ffprobe_harvid.\n"
  82                                 "If you already have a suitable ffmpeg installation on your system, we recommend creating "
  83                                 "symbolic links from ffmpeg to ffmpeg_harvid and from ffprobe to ffprobe_harvid.\n"
  84                                 ), PROGRAM_NAME) << endmsg;
  85                 return;
  86         }
  87         ffexecok = true;
  88
  89         if (infile.empty() || !probe()) {
  90                 return;
  91         }
  92         probeok = true;
  93 }
  94
  95 TranscodeFfmpeg::~TranscodeFfmpeg ()
  96 {
  97   ;
  98 }
  99
 100 bool
 101 TranscodeFfmpeg::probe ()
 102 {
 103         ffoutput = "";
 104         char **argp;
 105         argp=(char**) calloc(7,sizeof(char*));
 106         argp[0] = strdup(ffprobe_exe.c_str());
 107         argp[1] = strdup("-print_format");
 108         argp[2] = strdup("csv=nk=0");
 109         argp[3] = strdup("-show_format");
 110         argp[4] = strdup("-show_streams");
 111         argp[5] = strdup(infile.c_str());
 112         argp[6] = 0;
 113         ffcmd = new ARDOUR::SystemExec(ffprobe_exe, argp);
 114         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffprobeparse, this, _1 ,_2));
 115         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 116         if (ffcmd->start(1)) {
 117                 ffexit();
 118                 return false;
 119         }
 120
 121         /* wait for ffprobe process to exit */
 122         ffcmd->wait();
 123
 124         /* wait for interposer thread to copy all data.
 125          * SystemExec::Terminated is emitted and ffcmd set to NULL */
 126         int timeout = 300; // 1.5 sec
 127         while (ffcmd && --timeout > 0) {
 128                 Glib::usleep(5000);
 129         }
 130         if (timeout == 0 || ffoutput.empty()) {
 131                 return false;
 132         }
 133
 134         /* parse */
 135
 136         std::vector<std::vector<std::string> > lines;
 137         ParseCSV(ffoutput, lines);
 138         double timebase = 0;
 139         m_width = m_height = 0;
 140         m_fps = m_aspect = 0;
 141         m_duration = 0;
 142         m_sar.clear();
 143         m_codec.clear();
 144         m_audio.clear();
 145
 146 #define PARSE_FRACTIONAL_FPS(VAR) \
 147         { \
 148                 std::string::size_type pos; \
 149                 VAR = atof(value); \
 150                 pos = value.find_first_of('/'); \
 151                 if (pos != std::string::npos) { \
 152                         VAR = atof(value.substr(0, pos)) / atof(value.substr(pos+1)); \
 153                 } \
 154         }
 155
 156         for (std::vector<std::vector<std::string> >::iterator i = lines.begin(); i != lines.end(); ++i) {
 157                 if (i->at(0) == X_("format")) {
 158                         /* format,filename,#streams,format-name,format-long-name,start-time,duration,size,bitrate */
 159                 } else
 160                 if (i->at(0) == X_("stream")) {
 161                         if (i->at(5) == X_("codec_type=video") && m_width == 0) {
 162
 163                                 for (std::vector<std::string>::iterator kv = i->begin(); kv != i->end(); ++kv) {
 164                                         const size_t kvsep = kv->find('=');
 165                                         if(kvsep == std::string::npos) continue;
 166                                         std::string key = kv->substr(0, kvsep);
 167                                         std::string value = kv->substr(kvsep + 1);
 168
 169                                         if (key == X_("index")) {
 170                                                 m_videoidx = atoi(value);
 171                                         } else if (key == X_("width")) {
 172                                                 m_width = atoi(value);
 173                                         } else if (key == X_("height")) {
 174                                                 m_height = atoi(value);
 175                                         } else if (key == X_("codec_name")) {
 176                                                 if (!m_codec.empty()) m_codec += " ";
 177                                                 m_codec += value;
 178                                         } else if (key == X_("codec_long_name")) {
 179                                                 if (!m_codec.empty()) m_codec += " ";
 180                                                 m_codec += "[" + value + "]";
 181                                         } else if (key == X_("codec_tag_string")) {
 182                                                 if (!m_codec.empty()) m_codec += " ";
 183                                                 m_codec += "(" + value + ")";
 184                                         } else if (key == X_("r_frame_rate")) {
 185                                                 PARSE_FRACTIONAL_FPS(m_fps)
 186                                         } else if (key == X_("avg_frame_rate") && m_fps == 0) {
 187                                                 PARSE_FRACTIONAL_FPS(m_fps)
 188                                         } else if (key == X_("time_base")) {
 189                                                 PARSE_FRACTIONAL_FPS(timebase)
 190                                         } else if (key == X_("timecode") && m_duration == 0) {
 191                                                 int h,m,s; char f[7];
 192                                                 if (sscanf(i->at(16).c_str(), "%d:%d:%d:%s",&h,&m,&s,f) == 4) {
 193                                                         m_duration = (ARDOUR::framecnt_t) floor(m_fps * (
 194                                                                         h * 3600.0
 195                                                                 + m * 60.0
 196                                                                 + s * 1.0
 197                                                                 + atoi(f) / pow((double)10, (int)strlen(f))
 198                                                         ));
 199                                                 }
 200                                         } else if (key == X_("duration_ts") && m_fps == 0 && timebase !=0 ) {
 201                                                 m_duration = atof(value) * m_fps * timebase;
 202                                         } else if (key == X_("duration") && m_fps != 0 && m_duration == 0) {
 203                                                 m_duration = atof(value) * m_fps;
 204                                         } else if (key == X_("sample_aspect_ratio")) {
 205                                                 std::string::size_type pos;
 206                                                 pos = value.find_first_of(':');
 207                                                 if (pos != std::string::npos && atof(value.substr(pos+1)) != 0) {
 208                                                         m_sar = value;
 209                                                         m_sar.replace(pos, 1, "/");
 210                                                 }
 211                                         } else if (key == X_("display_aspect_ratio")) {
 212                                                 std::string::size_type pos;
 213                                                 pos = value.find_first_of(':');
 214                                                 if (pos != std::string::npos && atof(value.substr(pos+1)) != 0) {
 215                                                         m_aspect = atof(value.substr(0, pos)) / atof(value.substr(pos+1));
 216                                                 }
 217                                         }
 218                                 }
 219
 220                                 if (m_aspect == 0) {
 221                                         m_aspect = (double)m_width / (double)m_height;
 222                                 }
 223
 224                         } else if (i->at(5) == X_("codec_type=audio")) { /* new ffprobe */
 225                                 FFAudioStream as;
 226                                 for (std::vector<std::string>::iterator kv = i->begin(); kv != i->end(); ++kv) {
 227                                         const size_t kvsep = kv->find('=');
 228                                         if(kvsep == std::string::npos) continue;
 229                                         std::string key = kv->substr(0, kvsep);
 230                                         std::string value = kv->substr(kvsep + 1);
 231
 232                                         if (key == X_("channels")) {
 233                                                 as.channels   = atoi(value);
 234                                         } else if (key == X_("index")) {
 235                                                 as.stream_id  = value;
 236                                         } else if (key == X_("codec_long_name")) {
 237                                                 if (!as.name.empty()) as.name += " ";
 238                                                 as.name += value;
 239                                         } else if (key == X_("codec_name")) {
 240                                                 if (!as.name.empty()) as.name += " ";
 241                                                 as.name += value;
 242                                         } else if (key == X_("sample_fmt")) {
 243                                                 if (!as.name.empty()) as.name += " ";
 244                                                 as.name += "FMT:" + value;
 245                                         } else if (key == X_("sample_rate")) {
 246                                                 if (!as.name.empty()) as.name += " ";
 247                                                 as.name += "SR:" + value;
 248                                         }
 249
 250                                 }
 251                                 m_audio.push_back(as);
 252                         }
 253                 }
 254         }
 255         /* end parse */
 256
 257 #if 0 /* DEBUG */
 258         printf("FPS: %f\n", m_fps);
 259         printf("Duration: %lu frames\n",(unsigned long)m_duration);
 260         printf("W/H: %ix%i\n",m_width, m_height);
 261         printf("aspect: %f\n",m_aspect);
 262         printf("codec: %s\n",m_codec.c_str());
 263         if (m_audio.size() > 0) {
 264                 for (AudioStreams::iterator it = m_audio.begin(); it < m_audio.end(); ++it) {
 265                         printf("audio: %s - %i channels\n",(*it).stream_id.c_str(), (*it).channels);
 266                 }
 267         } else {
 268           printf("audio: no audio streams in file.\n");
 269         }
 270 #endif
 271
 272         return true;
 273 }
 274
 275 TranscodeFfmpeg::FFSettings
 276 TranscodeFfmpeg::default_encoder_settings ()
 277 {
 278         TranscodeFfmpeg::FFSettings ffs;
 279         ffs.clear();
 280         ffs["-vcodec"] = "mpeg4";
 281         ffs["-acodec"] = "ac3";
 282         ffs["-b:v"] = "5000k";
 283         ffs["-b:a"] = "160k";
 284         return ffs;
 285 }
 286
 287 TranscodeFfmpeg::FFSettings
 288 TranscodeFfmpeg::default_meta_data ()
 289 {
 290         TranscodeFfmpeg::FFSettings ffm;
 291         ffm.clear();
 292         ffm["comment"] = "Created with ardour";
 293         return ffm;
 294 }
 295
 296 char *
 297 TranscodeFfmpeg::format_metadata (std::string key, std::string value)
 298 {
 299         size_t start_pos = 0;
 300         std::string v1 = value;
 301         while((start_pos = v1.find_first_not_of(
 302                         "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789(),.\"'",
 303                         start_pos)) != std::string::npos)
 304         {
 305                 v1.replace(start_pos, 1, "_");
 306                 start_pos += 1;
 307         }
 308
 309         start_pos = 0;
 310         while((start_pos = v1.find("\"", start_pos)) != std::string::npos) {
 311                 v1.replace(start_pos, 1, "\\\"");
 312                 start_pos += 2;
 313         }
 314
 315         size_t len = key.length() + v1.length() + 4;
 316         char *mds = (char*) calloc(len, sizeof(char));
 317         snprintf(mds, len, "%s=\"%s\"", key.c_str(), v1.c_str());
 318         return mds;
 319 }
 320
 321 bool
 322 TranscodeFfmpeg::encode (std::string outfile, std::string inf_a, std::string inf_v, TranscodeFfmpeg::FFSettings ffs, TranscodeFfmpeg::FFSettings meta, bool map)
 323 {
 324 #define MAX_FFMPEG_ENCODER_ARGS (100)
 325         char **argp;
 326         int a=0;
 327
 328         argp=(char**) calloc(MAX_FFMPEG_ENCODER_ARGS,sizeof(char*));
 329         argp[a++] = strdup(ffmpeg_exe.c_str());
 330         if (m_avoffset < 0 || m_avoffset > 0) {
 331                 std::ostringstream osstream; osstream << m_avoffset;
 332                 argp[a++] = strdup("-itsoffset");
 333                 argp[a++] = strdup(osstream.str().c_str());
 334         }
 335         argp[a++] = strdup("-i");
 336         argp[a++] = strdup(inf_v.c_str());
 337
 338         argp[a++] = strdup("-i");
 339         argp[a++] = strdup(inf_a.c_str());
 340
 341         for(TranscodeFfmpeg::FFSettings::const_iterator it = ffs.begin(); it != ffs.end(); ++it) {
 342                 argp[a++] = strdup(it->first.c_str());
 343                 argp[a++] = strdup(it->second.c_str());
 344         }
 345         for(TranscodeFfmpeg::FFSettings::const_iterator it = meta.begin(); it != meta.end(); ++it) {
 346                 argp[a++] = strdup("-metadata");
 347                 argp[a++] = format_metadata(it->first.c_str(), it->second.c_str());
 348         }
 349         if (m_lead_in != 0 && m_lead_out != 0) {
 350                 std::ostringstream osstream;
 351                 argp[a++] = strdup("-vf");
 352                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_in;
 353                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 354                 osstream << X_(" [pre]; ");
 355                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_out;
 356                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 357                 osstream << X_(" [post]; ");
 358                 osstream << X_("[pre] [in] [post] concat=n=3");
 359                 argp[a++] = strdup(osstream.str().c_str());
 360         } else if (m_lead_in != 0) {
 361                 std::ostringstream osstream;
 362                 argp[a++] = strdup("-vf");
 363                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_in;
 364                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 365                 osstream << X_(" [pre]; ");
 366                 osstream << X_("[pre] [in] concat=n=2");
 367                 argp[a++] = strdup(osstream.str().c_str());
 368         } else if (m_lead_out != 0) {
 369                 std::ostringstream osstream;
 370                 argp[a++] = strdup("-vf");
 371                 osstream << X_("color=c=black:s=") << m_width << X_("x") << m_height << X_(":d=") << m_lead_out;
 372                 if (!m_sar.empty()) osstream << X_(":sar=") << m_sar;
 373                 osstream << X_(" [post]; ");
 374                 osstream << X_("[in] [post] concat=n=2");
 375                 argp[a++] = strdup(osstream.str().c_str());
 376         }
 377
 378         if (map) {
 379                 std::ostringstream osstream;
 380                 argp[a++] = strdup("-map");
 381                 osstream << X_("0:") << m_videoidx;
 382                 argp[a++] = strdup(osstream.str().c_str());
 383                 argp[a++] = strdup("-map");
 384                 argp[a++] = strdup("1:0");
 385         }
 386
 387         argp[a++] = strdup("-y");
 388         argp[a++] = strdup(outfile.c_str());
 389         argp[a] = (char *)0;
 390         assert(a<MAX_FFMPEG_ENCODER_ARGS);
 391         /* Note: these are free()d in ~SystemExec */
 392 #if 1 /* DEBUG */
 393         if (debug_enable) { /* tentative debug mode */
 394         printf("EXPORT ENCODE:\n");
 395         for (int i=0; i< a; ++i) {
 396           printf("%s ", argp[i]);
 397         }
 398         printf("\n");
 399         }
 400 #endif
 401
 402         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 403         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_v, this, _1 ,_2));
 404         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 405         if (ffcmd->start(2)) {
 406                 ffexit();
 407                 return false;
 408         }
 409         return true;
 410 }
 411
 412 bool
 413 TranscodeFfmpeg::extract_audio (std::string outfile, ARDOUR::framecnt_t /*samplerate*/, unsigned int stream)
 414 {
 415         if (!probeok) return false;
 416   if (stream >= m_audio.size()) return false;
 417
 418         char **argp;
 419         int i = 0;
 420
 421         argp=(char**) calloc(15,sizeof(char*));
 422         argp[i++] = strdup(ffmpeg_exe.c_str());
 423         argp[i++] = strdup("-i");
 424         argp[i++] = strdup(infile.c_str());
 425 #if 0 /* ffmpeg write original samplerate, use a3/SRC to resample */
 426         argp[i++] = strdup("-ar");
 427         argp[i] = (char*) calloc(7,sizeof(char)); snprintf(argp[i++], 7, "%"PRId64, samplerate);
 428 #endif
 429         argp[i++] = strdup("-ac");
 430         argp[i] = (char*) calloc(3,sizeof(char)); snprintf(argp[i++], 3, "%i", m_audio.at(stream).channels);
 431         argp[i++] = strdup("-map");
 432         argp[i] = (char*) calloc(8,sizeof(char)); snprintf(argp[i++], 8, "0:%s", m_audio.at(stream).stream_id.c_str());
 433         argp[i++] = strdup("-vn");
 434         argp[i++] = strdup("-acodec");
 435         argp[i++] = strdup("pcm_f32le");
 436         argp[i++] = strdup("-y");
 437         argp[i++] = strdup(outfile.c_str());
 438         argp[i++] = (char *)0;
 439         /* Note: argp is free()d in ~SystemExec */
 440 #if 1 /* DEBUG */
 441         if (debug_enable) { /* tentative debug mode */
 442         printf("EXTRACT AUDIO:\n");
 443         for (int i=0; i< 14; ++i) {
 444           printf("%s ", argp[i]);
 445         }
 446         printf("\n");
 447         }
 448 #endif
 449
 450         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 451         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_a, this, _1 ,_2));
 452         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 453         if (ffcmd->start(2)) {
 454                 ffexit();
 455                 return false;
 456         }
 457         return true;
 458 }
 459
 460
 461 bool
 462 TranscodeFfmpeg::transcode (std::string outfile, const int outw, const int outh, const int kbitps)
 463 {
 464         if (!probeok) return false;
 465
 466         char **argp;
 467         int bitrate = kbitps;
 468         int width = outw;
 469         int height = outh;
 470
 471         if (width < 1 || width > m_width) { width = m_width; } /* don't allow upscaling */
 472         if (height < 1 || height > m_height) { height = floor(width / m_aspect); }
 473
 474         if (bitrate == 0) {
 475                 const double bitperpixel = .7; /* avg quality */
 476                 bitrate = floor(m_fps * width * height * bitperpixel / 10000.0);
 477         } else {
 478                 bitrate = bitrate / 10;
 479         }
 480         if (bitrate < 10)  bitrate = 10;
 481         if (bitrate > 1000) bitrate = 1000;
 482
 483         argp=(char**) calloc(16,sizeof(char*));
 484         argp[0] = strdup(ffmpeg_exe.c_str());
 485         argp[1] = strdup("-i");
 486         argp[2] = strdup(infile.c_str());
 487         argp[3] = strdup("-b:v");
 488         argp[4] = (char*) calloc(7,sizeof(char)); snprintf(argp[4], 7, "%i0k", bitrate);
 489         argp[5] = strdup("-s");
 490         argp[6] = (char*) calloc(10,sizeof(char)); snprintf(argp[6], 10, "%ix%i", width, height);
 491         argp[7] = strdup("-y");
 492         argp[8] = strdup("-vcodec");
 493         argp[9] = strdup("mjpeg");
 494         argp[10] = strdup("-an");
 495         argp[11] = strdup("-intra");
 496         argp[12] = strdup("-g");
 497         argp[13] = strdup("1");
 498         argp[14] = strdup(outfile.c_str());
 499         argp[15] = (char *)0;
 500         /* Note: these are free()d in ~SystemExec */
 501 #if 1 /* DEBUG */
 502         if (debug_enable) { /* tentative debug mode */
 503         printf("TRANSCODE VIDEO:\n");
 504         for (int i=0; i< 15; ++i) {
 505           printf("%s ", argp[i]);
 506         }
 507         printf("\n");
 508         }
 509 #endif
 510         ffcmd = new ARDOUR::SystemExec(ffmpeg_exe, argp);
 511         ffcmd->ReadStdout.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffmpegparse_v, this, _1 ,_2));
 512         ffcmd->Terminated.connect_same_thread (*this, boost::bind (&TranscodeFfmpeg::ffexit, this));
 513         if (ffcmd->start(2)) {
 514                 ffexit();
 515                 return false;
 516         }
 517         return true;
 518 }
 519
 520 void
 521 TranscodeFfmpeg::cancel ()
 522 {
 523         if (!ffcmd || !ffcmd->is_running()) { return;}
 524         ffcmd->write_to_stdin("q");
 525 #ifdef PLATFORM_WINDOWS
 526         Sleep(1000);
 527 #else
 528         sleep (1);
 529 #endif
 530         if (ffcmd) {
 531           ffcmd->terminate();
 532         }
 533 }
 534
 535 void
 536 TranscodeFfmpeg::ffexit ()
 537 {
 538         delete ffcmd;
 539         ffcmd=0;
 540         Finished(); /* EMIT SIGNAL */
 541 }
 542
 543 void
 544 TranscodeFfmpeg::ffprobeparse (std::string d, size_t /* s */)
 545 {
 546         ffoutput+=d;
 547 }
 548
 549 void
 550 TranscodeFfmpeg::ffmpegparse_a (std::string d, size_t /* s */)
 551 {
 552         const char *t;
 553         int h,m,s; char f[7];
 554         ARDOUR::framecnt_t p = -1;
 555
 556         if (!(t=strstr(d.c_str(), "time="))) { return; }
 557
 558         if (sscanf(t+5, "%d:%d:%d.%s",&h,&m,&s,f) == 4) {
 559                 p = (ARDOUR::framecnt_t) floor( 100.0 * (
 560                       h * 3600.0
 561                     + m * 60.0
 562                     + s * 1.0
 563                     + atoi(f) / pow((double)10, (int)strlen(f))
 564                 ));
 565                 p = p * m_fps / 100.0;
 566                 if (p > m_duration ) { p = m_duration; }
 567                 Progress(p, m_duration); /* EMIT SIGNAL */
 568         } else {
 569                 Progress(0, 0); /* EMIT SIGNAL */
 570         }
 571 }
 572
 573 void
 574 TranscodeFfmpeg::ffmpegparse_v (std::string d, size_t /* s */)
 575 {
 576         if (strstr(d.c_str(), "ERROR") || strstr(d.c_str(), "Error") || strstr(d.c_str(), "error")) {
 577                 warning << "ffmpeg-error: " << d << endmsg;
 578         }
 579         if (strncmp(d.c_str(), "frame=",6)) {
 580 #if 1 /* DEBUG */
 581                 if (debug_enable) {
 582                         d.erase(d.find_last_not_of(" \t\r\n") + 1);
 583                   printf("ffmpeg: '%s'\n", d.c_str());
 584                 }
 585 #endif
 586                 Progress(0, 0); /* EMIT SIGNAL */
 587                 return;
 588         }
 589         ARDOUR::framecnt_t f = atol(d.substr(6));
 590         if (f == 0) {
 591                 Progress(0, 0); /* EMIT SIGNAL */
 592         } else {
 593                 Progress(f, m_duration); /* EMIT SIGNAL */
 594         }
 595 }