static int vc1_importer_get_accessunit( importer_t *importer, uint32_t track_number, lsmash_sample_t **p_sample )
{
if( !importer->info )
return LSMASH_ERR_NAMELESS;
if( track_number != 1 )
return LSMASH_ERR_FUNCTION_PARAM;
vc1_importer_t *vc1_imp = (vc1_importer_t *)importer->info;
vc1_info_t *info = &vc1_imp->info;
importer_status current_status = importer->status;
if( current_status == IMPORTER_ERROR )
return LSMASH_ERR_NAMELESS;
if( current_status == IMPORTER_EOF )
return IMPORTER_EOF;
int err = vc1_importer_get_access_unit_internal( importer, 0 );
if( err < 0 )
{
importer->status = IMPORTER_ERROR;
return err;
}
lsmash_sample_t *sample = lsmash_create_sample( vc1_imp->max_au_length );
if( !sample )
return LSMASH_ERR_MEMORY_ALLOC;
*p_sample = sample;
vc1_access_unit_t *access_unit = &info->access_unit;
vc1_importer_check_eof( importer, access_unit );
sample->dts = vc1_imp->ts_list.timestamp[ access_unit->number - 1 ].dts;
sample->cts = vc1_imp->ts_list.timestamp[ access_unit->number - 1 ].cts;
sample->prop.leading = access_unit->independent
|| access_unit->non_bipredictive
|| sample->cts >= vc1_imp->last_ref_intra_cts
? ISOM_SAMPLE_IS_NOT_LEADING : ISOM_SAMPLE_IS_UNDECODABLE_LEADING;
if( access_unit->independent && !access_unit->disposable )
vc1_imp->last_ref_intra_cts = sample->cts;
if( vc1_imp->composition_reordering_present && !access_unit->disposable && !access_unit->closed_gop )
sample->prop.allow_earlier = QT_SAMPLE_EARLIER_PTS_ALLOWED;
sample->prop.independent = access_unit->independent ? ISOM_SAMPLE_IS_INDEPENDENT : ISOM_SAMPLE_IS_NOT_INDEPENDENT;
sample->prop.disposable = access_unit->disposable ? ISOM_SAMPLE_IS_DISPOSABLE : ISOM_SAMPLE_IS_NOT_DISPOSABLE;
sample->prop.redundant = ISOM_SAMPLE_HAS_NO_REDUNDANCY;
if( access_unit->random_accessible )
/* All random access point is a sync sample even if it's an open RAP. */
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
sample->length = access_unit->data_length;
memcpy( sample->data, access_unit->data, access_unit->data_length );
return current_status;
}
static int wave_importer_get_accessunit( importer_t *importer, uint32_t track_number, lsmash_sample_t **p_sample )
{
if( !importer->info )
return LSMASH_ERR_NAMELESS;
if( track_number != 1 )
return LSMASH_ERR_FUNCTION_PARAM;
lsmash_audio_summary_t *summary = (lsmash_audio_summary_t *)lsmash_get_entry_data( importer->summaries, track_number );
if( !summary )
return LSMASH_ERR_NAMELESS;
wave_importer_t *wave_imp = (wave_importer_t *)importer->info;
importer_status current_status = importer->status;
if( current_status == IMPORTER_ERROR )
return LSMASH_ERR_NAMELESS;
if( current_status == IMPORTER_EOF )
return IMPORTER_EOF;
if( wave_imp->number_of_samples / summary->samples_in_frame > wave_imp->au_number )
wave_imp->au_length = summary->bytes_per_frame;
else
{
wave_imp->au_length = wave_imp->fmt.wfx.nBlockAlign * (wave_imp->number_of_samples % summary->samples_in_frame);
importer->status = IMPORTER_EOF;
if( wave_imp->au_length == 0 )
return IMPORTER_EOF;
}
lsmash_sample_t *sample = lsmash_create_sample( wave_imp->au_length );
if( !sample )
return LSMASH_ERR_MEMORY_ALLOC;
*p_sample = sample;
if( lsmash_bs_get_bytes_ex( importer->bs, wave_imp->au_length, sample->data ) != wave_imp->au_length )
{
importer->status = IMPORTER_ERROR;
return LSMASH_ERR_INVALID_DATA;
}
sample->length = wave_imp->au_length;
sample->dts = wave_imp->au_number ++ * summary->samples_in_frame;
sample->cts = sample->dts;
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
return current_status;
}
static int dts_importer_get_accessunit( importer_t *importer, uint32_t track_number, lsmash_sample_t **p_sample )
{
if( !importer->info )
return LSMASH_ERR_NAMELESS;
if( track_number != 1 )
return LSMASH_ERR_FUNCTION_PARAM;
lsmash_audio_summary_t *summary = (lsmash_audio_summary_t *)lsmash_get_entry_data( importer->summaries, track_number );
if( !summary )
return LSMASH_ERR_NAMELESS;
dts_importer_t *dts_imp = (dts_importer_t *)importer->info;
dts_info_t *info = &dts_imp->info;
importer_status current_status = importer->status;
if( current_status == IMPORTER_ERROR )
return LSMASH_ERR_NAMELESS;
if( current_status == IMPORTER_EOF && dts_imp->au_length == 0 )
return IMPORTER_EOF;
if( current_status == IMPORTER_CHANGE )
summary->max_au_length = 0;
lsmash_sample_t *sample = lsmash_create_sample( dts_imp->au_length );
if( !sample )
return LSMASH_ERR_MEMORY_ALLOC;
*p_sample = sample;
memcpy( sample->data, dts_imp->au, dts_imp->au_length );
sample->length = dts_imp->au_length;
sample->dts = dts_imp->au_number++ * summary->samples_in_frame;
sample->cts = sample->dts;
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
sample->prop.pre_roll.distance = !!(info->flags & DTS_EXT_SUBSTREAM_LBR_FLAG); /* MDCT */
if( importer->status == IMPORTER_EOF )
{
dts_imp->au_length = 0;
return 0;
}
if( dts_importer_get_next_accessunit_internal( importer ) < 0 )
importer->status = IMPORTER_ERROR;
return current_status;
}
static int write_frame( hnd_t handle, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
{
mp4_hnd_t *p_mp4 = handle;
uint64_t dts, cts;
if( !p_mp4->i_numframe )
{
p_mp4->i_start_offset = p_picture->i_dts * -1;
p_mp4->i_first_cts = p_mp4->b_dts_compress ? 0 : p_mp4->i_start_offset * p_mp4->i_time_inc;
if( p_mp4->b_fragments )
{
lsmash_edit_t edit;
edit.duration = ISOM_EDIT_DURATION_UNKNOWN32; /* QuickTime doesn't support 64bit duration. */
edit.start_time = p_mp4->i_first_cts;
edit.rate = ISOM_EDIT_MODE_NORMAL;
MP4_LOG_IF_ERR( lsmash_create_explicit_timeline_map( p_mp4->p_root, p_mp4->i_track, edit ),
"failed to set timeline map for video.\n" );
}
}
lsmash_sample_t *p_sample = lsmash_create_sample( i_size + p_mp4->i_sei_size );
MP4_FAIL_IF_ERR( !p_sample,
"failed to create a video sample data.\n" );
if( p_mp4->p_sei_buffer )
{
memcpy( p_sample->data, p_mp4->p_sei_buffer, p_mp4->i_sei_size );
free( p_mp4->p_sei_buffer );
p_mp4->p_sei_buffer = NULL;
}
memcpy( p_sample->data + p_mp4->i_sei_size, p_nalu, i_size );
p_mp4->i_sei_size = 0;
if( p_mp4->b_dts_compress )
{
if( p_mp4->i_numframe == 1 )
p_mp4->i_init_delta = (p_picture->i_dts + p_mp4->i_start_offset) * p_mp4->i_time_inc;
dts = p_mp4->i_numframe > p_mp4->i_delay_frames
? p_picture->i_dts * p_mp4->i_time_inc
: p_mp4->i_numframe * (p_mp4->i_init_delta / p_mp4->i_dts_compress_multiplier);
cts = p_picture->i_pts * p_mp4->i_time_inc;
}
else
{
dts = (p_picture->i_dts + p_mp4->i_start_offset) * p_mp4->i_time_inc;
cts = (p_picture->i_pts + p_mp4->i_start_offset) * p_mp4->i_time_inc;
}
p_sample->dts = dts;
p_sample->cts = cts;
p_sample->index = p_mp4->i_sample_entry;
p_sample->prop.ra_flags = p_picture->b_keyframe ? ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC : ISOM_SAMPLE_RANDOM_ACCESS_FLAG_NONE;
if( p_mp4->b_fragments && p_mp4->i_numframe && p_sample->prop.ra_flags != ISOM_SAMPLE_RANDOM_ACCESS_FLAG_NONE )
{
MP4_FAIL_IF_ERR( lsmash_flush_pooled_samples( p_mp4->p_root, p_mp4->i_track, p_sample->dts - p_mp4->i_prev_dts ),
"failed to flush the rest of samples.\n" );
MP4_FAIL_IF_ERR( lsmash_create_fragment_movie( p_mp4->p_root ),
"failed to create a movie fragment.\n" );
}
/* Append data per sample. */
MP4_FAIL_IF_ERR( lsmash_append_sample( p_mp4->p_root, p_mp4->i_track, p_sample ),
"failed to append a video frame.\n" );
p_mp4->i_prev_dts = dts;
p_mp4->i_numframe++;
return i_size;
}
int lsmash_create_reference_chapter_track( lsmash_root_t *root, uint32_t track_ID, char *file_name )
{
if( isom_check_initializer_present( root ) < 0 )
goto error_message;
lsmash_file_t *file = root->file;
if( !file
|| !file->moov
|| !file->moov->mvhd )
goto error_message;
if( file->forbid_tref || (!file->qt_compatible && !file->itunes_movie) )
{
lsmash_log( NULL, LSMASH_LOG_ERROR, "reference chapter is not available for this file.\n" );
goto error_message;
}
FILE *chapter = NULL; /* shut up 'uninitialized' warning */
/* Create a Track Reference Box. */
isom_trak_t *trak = isom_get_trak( file, track_ID );
if( !trak )
{
lsmash_log( NULL, LSMASH_LOG_ERROR, "the specified track ID to apply the chapter doesn't exist.\n" );
goto error_message;
}
if( !trak->tref && !isom_add_tref( trak ) )
goto error_message;
/* Create a track_ID for a new chapter track. */
uint32_t *id = (uint32_t *)lsmash_malloc( sizeof(uint32_t) );
if( !id )
goto error_message;
uint32_t chapter_track_ID = *id = file->moov->mvhd->next_track_ID;
/* Create a Track Reference Type Box. */
isom_tref_type_t *chap = isom_add_track_reference_type( trak->tref, QT_TREF_TYPE_CHAP );
if( !chap )
{
lsmash_free( id );
goto error_message;
}
chap->ref_count = 1;
chap->track_ID = id;
/* Create a reference chapter track. */
if( chapter_track_ID != lsmash_create_track( root, ISOM_MEDIA_HANDLER_TYPE_TEXT_TRACK ) )
goto error_message;
/* Set track parameters. */
lsmash_track_parameters_t track_param;
lsmash_initialize_track_parameters( &track_param );
track_param.mode = ISOM_TRACK_IN_MOVIE | ISOM_TRACK_IN_PREVIEW;
if( lsmash_set_track_parameters( root, chapter_track_ID, &track_param ) < 0 )
goto fail;
/* Set media parameters. */
uint64_t media_timescale = lsmash_get_media_timescale( root, track_ID );
if( !media_timescale )
goto fail;
lsmash_media_parameters_t media_param;
lsmash_initialize_media_parameters( &media_param );
media_param.timescale = media_timescale;
media_param.ISO_language = file->max_3gpp_version >= 6 || file->itunes_movie ? ISOM_LANGUAGE_CODE_UNDEFINED : 0;
media_param.MAC_language = 0;
if( lsmash_set_media_parameters( root, chapter_track_ID, &media_param ) < 0 )
goto fail;
/* Create a sample description. */
lsmash_codec_type_t sample_type = file->max_3gpp_version >= 6 || file->itunes_movie
? ISOM_CODEC_TYPE_TX3G_TEXT
: QT_CODEC_TYPE_TEXT_TEXT;
lsmash_summary_t summary = { .sample_type = sample_type, .data_ref_index = 1 };
uint32_t sample_entry = lsmash_add_sample_entry( root, chapter_track_ID, &summary );
if( !sample_entry )
goto fail;
/* Check each line format. */
fn_get_chapter_data fnc = isom_check_chap_line( file_name );
if( !fnc )
goto fail;
/* Open chapter format file. */
chapter = lsmash_fopen( file_name, "rb" );
if( !chapter )
{
lsmash_log( NULL, LSMASH_LOG_ERROR, "failed to open the chapter file \"%s\".\n", file_name );
goto fail;
}
/* Parse the file and write text samples. */
isom_chapter_entry_t data;
while( !fnc( chapter, &data ) )
{
/* set start_time */
data.start_time = data.start_time * 1e-9 * media_timescale + 0.5;
/* write a text sample here */
int is_qt_text = lsmash_check_codec_type_identical( sample_type, QT_CODEC_TYPE_TEXT_TEXT );
uint16_t name_length = strlen( data.chapter_name );
lsmash_sample_t *sample = lsmash_create_sample( 2 + name_length + 12 * is_qt_text );
if( !sample )
{
lsmash_free( data.chapter_name );
goto fail;
}
sample->data[0] = (name_length >> 8) & 0xff;
sample->data[1] = name_length & 0xff;
memcpy( sample->data + 2, data.chapter_name, name_length );
if( is_qt_text )
{
/* QuickTime Player requires Text Encoding Attribute Box ('encd') if media language is ISO language codes : undefined.
* Also this box can avoid garbling if the QuickTime text sample is encoded by Unicode characters.
* Note: 3GPP Timed Text supports only UTF-8 or UTF-16, so this box isn't needed. */
static const uint8_t encd[12] =
{
0x00, 0x00, 0x00, 0x0C, /* size: 12 */
0x65, 0x6E, 0x63, 0x64, /* type: 'encd' */
0x00, 0x00, 0x01, 0x00 /* Unicode Encoding */
};
memcpy( sample->data + 2 + name_length, encd, 12 );
}
sample->dts = data.start_time;
sample->cts = data.start_time;
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
sample->index = sample_entry;
if( lsmash_append_sample( root, chapter_track_ID, sample ) < 0 )
{
lsmash_free( data.chapter_name );
goto fail;
}
lsmash_freep( &data.chapter_name );
}
if( lsmash_flush_pooled_samples( root, chapter_track_ID, 0 ) < 0 )
goto fail;
isom_trak_t *chapter_trak = isom_get_trak( file, chapter_track_ID );
if( !chapter_trak )
goto fail;
fclose( chapter );
chapter_trak->is_chapter = 1;
chapter_trak->related_track_ID = track_ID;
return 0;
fail:
if( chapter )
fclose( chapter );
/* Remove chapter track reference. */
if( trak->tref->ref_list.tail )
isom_remove_box_by_itself( trak->tref->ref_list.tail->data );
if( trak->tref->ref_list.entry_count == 0 )
isom_remove_box_by_itself( trak->tref );
/* Remove the reference chapter track attached at tail of the list. */
if( file->moov->trak_list.tail )
isom_remove_box_by_itself( file->moov->trak_list.tail->data );
error_message:
lsmash_log( NULL, LSMASH_LOG_ERROR, "failed to set reference chapter.\n" );
return LSMASH_ERR_NAMELESS;
}
uint32_t lsmash_count_tyrant_chapter( lsmash_root_t *root )
{
if( isom_check_initializer_present( root ) < 0
&& root->file->initializer->moov
&& root->file->initializer->moov->udta
&& root->file->initializer->moov->udta->chpl
&& root->file->initializer->moov->udta->chpl->list )
return root->file->initializer->moov->udta->chpl->list->entry_count;
return 0;
}
char *lsmash_get_tyrant_chapter( lsmash_root_t *root, uint32_t index, double *timestamp )
{
if( isom_check_initializer_present( root ) < 0 )
return NULL;
lsmash_file_t *file = root->file->initializer;
if( !file->moov
|| !file->moov->mvhd
|| !file->moov->udta
|| !file->moov->udta->chpl )
return NULL;
isom_chpl_t *chpl = file->moov->udta->chpl;
isom_chpl_entry_t *data = (isom_chpl_entry_t *)lsmash_get_entry_data( chpl->list, index );
if( !data )
return NULL;
double timescale = chpl->version ? 10000000.0 : file->moov->mvhd->timescale;
*timestamp = data->start_time / timescale;
if( !memcmp( data->chapter_name, UTF8_BOM, UTF8_BOM_LENGTH ) )
return data->chapter_name + UTF8_BOM_LENGTH;
return data->chapter_name;
}
int lsmash_print_chapter_list( lsmash_root_t *root )
{
if( isom_check_initializer_present( root ) < 0
|| !(root->file->initializer->flags & LSMASH_FILE_MODE_READ) )
return LSMASH_ERR_FUNCTION_PARAM;
lsmash_file_t *file = root->file->initializer;
if( file->moov
&& file->moov->udta
&& file->moov->udta->chpl )
{
isom_chpl_t *chpl = file->moov->udta->chpl;
uint32_t timescale;
if( !chpl->version )
{
if( !file->moov
&& !file->moov->mvhd )
return LSMASH_ERR_NAMELESS;
timescale = file->moov->mvhd->timescale;
}
else
timescale = 10000000;
uint32_t i = 1;
for( lsmash_entry_t *entry = chpl->list->head; entry; entry = entry->next )
{
isom_chpl_entry_t *data = (isom_chpl_entry_t *)entry->data;
int64_t start_time = data->start_time / timescale;
int hh = start_time / 3600;
int mm = (start_time / 60) % 60;
int ss = start_time % 60;
int ms = ((data->start_time / (double)timescale) - hh * 3600 - mm * 60 - ss) * 1e3 + 0.5;
if( !memcmp( data->chapter_name, UTF8_BOM, UTF8_BOM_LENGTH ) ) /* detect BOM */
{
data->chapter_name += UTF8_BOM_LENGTH;
#ifdef _WIN32
if( i == 1 )
printf( UTF8_BOM ); /* add BOM on Windows */
#endif
}
printf( "CHAPTER%02"PRIu32"=%02d:%02d:%02d.%03d\n", i, hh, mm, ss, ms );
printf( "CHAPTER%02"PRIu32"NAME=%s\n", i++, data->chapter_name );
}
return 0;
}
lsmash_log( NULL, LSMASH_LOG_ERROR, "this file doesn't have a chapter list.\n" );
return LSMASH_ERR_NAMELESS;
}
int lsmash_create_reference_chapter_track( lsmash_root_t *root, uint32_t track_ID, char *file_name )
{
if( !root || !root->moov || !root->moov->mvhd || !root->moov->trak_list )
goto error_message;
if( !root->qt_compatible && !root->itunes_movie )
{
lsmash_log( LSMASH_LOG_ERROR, "reference chapter is not available for this file.\n" );
goto error_message;
}
FILE *chapter = NULL; /* shut up 'uninitialized' warning */
/* Create a Track Reference Box. */
isom_trak_entry_t *trak = isom_get_trak( root, track_ID );
if( !trak )
{
lsmash_log( LSMASH_LOG_ERROR, "the specified track ID to apply the chapter doesn't exist.\n" );
goto error_message;
}
if( isom_add_tref( trak ) )
goto error_message;
/* Create a track_ID for a new chapter track. */
uint32_t *id = (uint32_t *)malloc( sizeof(uint32_t) );
if( !id )
goto error_message;
uint32_t chapter_track_ID = *id = root->moov->mvhd->next_track_ID;
/* Create a Track Reference Type Box. */
isom_tref_type_t *chap = isom_add_track_reference_type( trak->tref, QT_TREF_TYPE_CHAP, 1, id );
if( !chap )
goto error_message; /* no need to free id */
/* Create a reference chapter track. */
if( chapter_track_ID != lsmash_create_track( root, ISOM_MEDIA_HANDLER_TYPE_TEXT_TRACK ) )
goto error_message;
/* Set track parameters. */
lsmash_track_parameters_t track_param;
lsmash_initialize_track_parameters( &track_param );
track_param.mode = ISOM_TRACK_IN_MOVIE | ISOM_TRACK_IN_PREVIEW;
if( lsmash_set_track_parameters( root, chapter_track_ID, &track_param ) )
goto fail;
/* Set media parameters. */
uint64_t media_timescale = lsmash_get_media_timescale( root, track_ID );
if( !media_timescale )
goto fail;
lsmash_media_parameters_t media_param;
lsmash_initialize_media_parameters( &media_param );
media_param.timescale = media_timescale;
media_param.ISO_language = root->max_3gpp_version >= 6 || root->itunes_movie ? ISOM_LANGUAGE_CODE_UNDEFINED : 0;
media_param.MAC_language = 0;
if( lsmash_set_media_parameters( root, chapter_track_ID, &media_param ) )
goto fail;
/* Create a sample description. */
lsmash_codec_type_t sample_type = root->max_3gpp_version >= 6 || root->itunes_movie
? ISOM_CODEC_TYPE_TX3G_TEXT
: QT_CODEC_TYPE_TEXT_TEXT;
lsmash_summary_t summary = { .sample_type = sample_type };
uint32_t sample_entry = lsmash_add_sample_entry( root, chapter_track_ID, &summary );
if( !sample_entry )
goto fail;
/* Check each line format. */
fn_get_chapter_data fnc = isom_check_chap_line( file_name );
if( !fnc )
goto fail;
/* Open chapter format file. */
chapter = fopen( file_name, "rb" );
if( !chapter )
{
lsmash_log( LSMASH_LOG_ERROR, "failed to open the chapter file \"%s\".\n", file_name );
goto fail;
}
/* Parse the file and write text samples. */
isom_chapter_entry_t data;
while( !fnc( chapter, &data ) )
{
/* set start_time */
data.start_time = data.start_time * 1e-9 * media_timescale + 0.5;
/* write a text sample here */
int is_qt_text = lsmash_check_codec_type_identical( sample_type, QT_CODEC_TYPE_TEXT_TEXT );
uint16_t name_length = strlen( data.chapter_name );
lsmash_sample_t *sample = lsmash_create_sample( 2 + name_length + 12 * is_qt_text );
if( !sample )
{
free( data.chapter_name );
goto fail;
}
sample->data[0] = (name_length >> 8) & 0xff;
sample->data[1] = name_length & 0xff;
memcpy( sample->data + 2, data.chapter_name, name_length );
if( is_qt_text )
{
/* QuickTime Player requires Text Encoding Attribute Box ('encd') if media language is ISO language codes : undefined.
* Also this box can avoid garbling if the QuickTime text sample is encoded by Unicode characters.
* Note: 3GPP Timed Text supports only UTF-8 or UTF-16, so this box isn't needed. */
static const uint8_t encd[12] =
{
0x00, 0x00, 0x00, 0x0C, /* size: 12 */
0x65, 0x6E, 0x63, 0x64, /* type: 'encd' */
0x00, 0x00, 0x01, 0x00 /* Unicode Encoding */
};
memcpy( sample->data + 2 + name_length, encd, 12 );
}
sample->dts = sample->cts = data.start_time;
sample->prop.ra_flags = ISOM_SAMPLE_RANDOM_ACCESS_FLAG_SYNC;
sample->index = sample_entry;
if( lsmash_append_sample( root, chapter_track_ID, sample ) )
{
free( data.chapter_name );
goto fail;
}
free( data.chapter_name );
data.chapter_name = NULL;
}
if( lsmash_flush_pooled_samples( root, chapter_track_ID, 0 ) )
goto fail;
isom_trak_entry_t *chapter_trak = isom_get_trak( root, chapter_track_ID );
if( !chapter_trak )
goto fail;
fclose( chapter );
chapter_trak->is_chapter = 1;
chapter_trak->related_track_ID = track_ID;
return 0;
fail:
if( chapter )
fclose( chapter );
/* Remove chapter track reference. */
lsmash_remove_entry_direct( trak->tref->ref_list, trak->tref->ref_list->tail, isom_remove_track_reference_type );
if( trak->tref->ref_list->entry_count == 0 )
isom_remove_tref( trak->tref );
/* Remove the reference chapter track attached at tail of the list. */
lsmash_remove_entry_direct( root->moov->trak_list, root->moov->trak_list->tail, isom_remove_trak );
error_message:
lsmash_log( LSMASH_LOG_ERROR, "failed to set reference chapter.\n" );
return -1;
}
