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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie dmackie@cisco.com
*/
// N.B. mp4extract just extracts tracks/samples from an mp4 file
// For many track types this is insufficient to reconsruct a valid
// elementary stream (ES). Use "mp4creator -extract=<trackId>" if
// you need the ES reconstructed.
#include "util/impl.h"
using namespace mp4v2::util;
char* ProgName;
char* Mp4PathName;
char* Mp4FileName;
// forward declaration
void ExtractTrack( MP4FileHandle mp4File, MP4TrackId trackId,
bool sampleMode, MP4SampleId sampleId, char* dstFileName = NULL );
extern "C" int main( int argc, char** argv )
{
const char* const usageString =
"[-l] [-t <track-id>] [-s <sample-id>] [-v [<level>]] <file-name>";
bool doList = false;
bool doSamples = false;
MP4TrackId trackId = MP4_INVALID_TRACK_ID;
MP4SampleId sampleId = MP4_INVALID_SAMPLE_ID;
char* dstFileName = NULL;
MP4LogLevel verbosity = MP4_LOG_ERROR;
/* begin processing command line */
ProgName = argv[0];
while ( true ) {
int c = -1;
int option_index = 0;
static const prog::Option long_options[] = {
{ "list", prog::Option::NO_ARG, 0, 'l' },
{ "track", prog::Option::REQUIRED_ARG, 0, 't' },
{ "sample", prog::Option::OPTIONAL_ARG, 0, 's' },
{ "verbose", prog::Option::OPTIONAL_ARG, 0, 'v' },
{ "version", prog::Option::NO_ARG, 0, 'V' },
{ NULL, prog::Option::NO_ARG, 0, 0 }
};
c = prog::getOptionSingle( argc, argv, "lt:s::v::V", long_options, &option_index );
if ( c == -1 )
break;
switch ( c ) {
case 'l':
doList = true;
break;
case 's':
doSamples = true;
if ( prog::optarg ) {
if ( sscanf( prog::optarg, "%u", &sampleId ) != 1 ) {
fprintf( stderr,
"%s: bad sample-id specified: %s\n",
ProgName, prog::optarg );
}
}
break;
case 't':
if ( sscanf( prog::optarg, "%u", &trackId ) != 1 ) {
fprintf( stderr,
"%s: bad track-id specified: %s\n",
ProgName, prog::optarg );
exit( 1 );
}
break;
case 'v':
verbosity = MP4_LOG_VERBOSE1;
if ( prog::optarg ) {
uint32_t level;
if ( sscanf( prog::optarg, "%u", &level ) == 1 ) {
if ( level >= 2 ) {
verbosity = MP4_LOG_VERBOSE2;
}
if ( level >= 3 ) {
verbosity = MP4_LOG_VERBOSE3;
}
if ( level >= 4 ) {
verbosity = MP4_LOG_VERBOSE4;
}
}
}
break;
case '?':
fprintf( stderr, "usage: %s %s\n", ProgName, usageString );
exit( 0 );
case 'V':
fprintf( stderr, "%s - %s\n", ProgName, MP4V2_PROJECT_name_formal );
exit( 0 );
default:
fprintf( stderr, "%s: unknown option specified, ignoring: %c\n",
ProgName, c );
}
}
/* check that we have at least one non-option argument */
if ( ( argc - prog::optind ) < 1 ) {
fprintf( stderr, "usage: %s %s\n", ProgName, usageString );
exit( 1 );
}
MP4LogSetLevel(verbosity);
if ( verbosity ) {
fprintf( stderr, "%s version %s\n", ProgName, MP4V2_PROJECT_version );
}
/* point to the specified file names */
Mp4PathName = argv[prog::optind++];
/* get dest file name for a single track */
if ( trackId && ( argc - prog::optind ) > 0 ) {
dstFileName = argv[prog::optind++];
}
char* lastSlash = strrchr( Mp4PathName, '/' );
if ( lastSlash ) {
Mp4FileName = lastSlash + 1;
}
else {
Mp4FileName = Mp4PathName;
}
/* warn about extraneous non-option arguments */
if ( prog::optind < argc ) {
fprintf( stderr, "%s: unknown options specified, ignoring: ", ProgName );
while ( prog::optind < argc ) {
fprintf( stderr, "%s ", argv[prog::optind++] );
}
fprintf( stderr, "\n" );
}
/* end processing of command line */
MP4FileHandle mp4File = MP4Read( Mp4PathName );
if ( !mp4File ) {
exit( 1 );
}
if ( doList ) {
MP4Info( mp4File );
exit( 0 );
}
if ( trackId == 0 ) {
uint32_t numTracks = MP4GetNumberOfTracks( mp4File );
for ( uint32_t i = 0; i < numTracks; i++ ) {
trackId = MP4FindTrackId( mp4File, i );
ExtractTrack( mp4File, trackId, doSamples, sampleId );
}
}
else {
ExtractTrack( mp4File, trackId, doSamples, sampleId, dstFileName );
}
MP4Close( mp4File );
return( 0 );
}
void ExtractTrack( MP4FileHandle mp4File, MP4TrackId trackId,
bool sampleMode, MP4SampleId sampleId, char* dstFileName )
{
static string outName;
File out;
if( !sampleMode ) {
if( !dstFileName ) {
stringstream ss;
ss << Mp4FileName << ".t" << trackId;
outName = ss.str();
} else {
outName = dstFileName;
}
if( out.open( outName.c_str(), File::MODE_CREATE )) {
fprintf( stderr, "%s: can't open %s: %s\n", ProgName, outName.c_str(), sys::getLastErrorStr() );
return;
}
}
MP4SampleId numSamples;
if ( sampleMode && sampleId != MP4_INVALID_SAMPLE_ID ) {
numSamples = sampleId;
}
else {
sampleId = 1;
numSamples = MP4GetTrackNumberOfSamples( mp4File, trackId );
}
for ( ; sampleId <= numSamples; sampleId++ ) {
// signals to ReadSample() that it should malloc a buffer for us
uint8_t* pSample = NULL;
uint32_t sampleSize = 0;
if( !MP4ReadSample( mp4File, trackId, sampleId, &pSample, &sampleSize )) {
fprintf( stderr, "%s: read sample %u for %s failed\n", ProgName, sampleId, outName.c_str() );
break;
}
if ( sampleMode ) {
stringstream ss;
ss << Mp4FileName << ".t" << trackId << ".s" << sampleId;
outName = ss.str();
if( out.open( outName.c_str(), File::MODE_CREATE )) {
fprintf( stderr, "%s: can't open %s: %s\n", ProgName, outName.c_str(), sys::getLastErrorStr() );
break;
}
}
File::Size nout;
if( out.write( pSample, sampleSize, nout )) {
fprintf( stderr, "%s: write to %s failed: %s\n", ProgName, outName.c_str(), sys::getLastErrorStr() );
break;
}
free( pSample );
if( sampleMode )
out.close();
}
out.close();
}
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