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owntone-server/src/library/filescanner_ffmpeg.c
ejurgensen 46a9114948 [scan] Support for nested playlists 
Also includes some refactoring of the playlist filescanner and some
rearrangement of filescanner.c functions.
2020-02-08 10:55:15 +01:00

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/*
* Copyright (C) 2009-2011 Julien BLACHE <jb@jblache.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdint.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include "db.h"
#include "logger.h"
#include "misc.h"
#include "http.h"
/* Mapping between the metadata name(s) and the offset
* of the equivalent metadata field in struct media_file_info */
struct metadata_map {
char *key;
int as_int;
size_t offset;
int (*handler_function)(struct media_file_info *, char *);
};
// Used for passing errors to DPRINTF (can't count on av_err2str being present)
static char errbuf[64];
static inline char *
err2str(int errnum)
{
av_strerror(errnum, errbuf, sizeof(errbuf));
return errbuf;
}
static int
parse_slash_separated_ints(char *string, uint32_t *firstval, uint32_t *secondval)
{
int numvals = 0;
char *ptr;
ptr = strchr(string, '/');
if (ptr)
{
*ptr = '\0';
if (safe_atou32(ptr + 1, secondval) == 0)
numvals++;
}
if (safe_atou32(string, firstval) == 0)
numvals++;
return numvals;
}
static int
parse_track(struct media_file_info *mfi, char *track_string)
{
uint32_t *track = (uint32_t *) ((char *) mfi + mfi_offsetof(track));
uint32_t *total_tracks = (uint32_t *) ((char *) mfi + mfi_offsetof(total_tracks));
return parse_slash_separated_ints(track_string, track, total_tracks);
}
static int
parse_disc(struct media_file_info *mfi, char *disc_string)
{
uint32_t *disc = (uint32_t *) ((char *) mfi + mfi_offsetof(disc));
uint32_t *total_discs = (uint32_t *) ((char *) mfi + mfi_offsetof(total_discs));
return parse_slash_separated_ints(disc_string, disc, total_discs);
}
static int
parse_date(struct media_file_info *mfi, char *date_string)
{
char year_string[21];
uint32_t *year = (uint32_t *) ((char *) mfi + mfi_offsetof(year));
uint32_t *date_released = (uint32_t *) ((char *) mfi + mfi_offsetof(date_released));
struct tm tm = { 0 };
int ret = 0;
if ((*year == 0) && (safe_atou32(date_string, year) == 0))
ret++;
if ( strptime(date_string, "%FT%T%z", &tm) // ISO 8601, %F=%Y-%m-%d, %T=%H:%M:%S
|| strptime(date_string, "%F %T", &tm)
|| strptime(date_string, "%F %H:%M", &tm)
|| strptime(date_string, "%F", &tm)
)
{
*date_released = (uint32_t)mktime(&tm);
ret++;
}
if ((*date_released == 0) && (*year != 0))
{
snprintf(year_string, sizeof(year_string), "%" PRIu32 "-01-01T12:00:00", *year);
if (strptime(year_string, "%FT%T", &tm))
{
*date_released = (uint32_t)mktime(&tm);
ret++;
}
}
return ret;
}
static int
parse_albumid(struct media_file_info *mfi, char *id_string)
{
// Already set by a previous tag that we give higher priority
if (mfi->songalbumid)
return 0;
// Limit hash length to 63 bits, due to signed type in sqlite
mfi->songalbumid = murmur_hash64(id_string, strlen(id_string), 0) >> 1;
return 1;
}
/* Lookup is case-insensitive, first occurrence takes precedence */
static const struct metadata_map md_map_generic[] =
{
{ "title", 0, mfi_offsetof(title), NULL },
{ "artist", 0, mfi_offsetof(artist), NULL },
{ "author", 0, mfi_offsetof(artist), NULL },
{ "album_artist", 0, mfi_offsetof(album_artist), NULL },
{ "album", 0, mfi_offsetof(album), NULL },
{ "genre", 0, mfi_offsetof(genre), NULL },
{ "composer", 0, mfi_offsetof(composer), NULL },
{ "grouping", 0, mfi_offsetof(grouping), NULL },
{ "orchestra", 0, mfi_offsetof(orchestra), NULL },
{ "conductor", 0, mfi_offsetof(conductor), NULL },
{ "comment", 0, mfi_offsetof(comment), NULL },
{ "description", 0, mfi_offsetof(comment), NULL },
{ "track", 1, mfi_offsetof(track), parse_track },
{ "disc", 1, mfi_offsetof(disc), parse_disc },
{ "year", 1, mfi_offsetof(year), NULL },
{ "date", 1, mfi_offsetof(date_released), parse_date },
{ "title-sort", 0, mfi_offsetof(title_sort), NULL },
{ "artist-sort", 0, mfi_offsetof(artist_sort), NULL },
{ "album-sort", 0, mfi_offsetof(album_sort), NULL },
{ "compilation", 1, mfi_offsetof(compilation), NULL },
// These tags are used to determine if files belong to a common compilation
// or album, ref. https://picard.musicbrainz.org/docs/tags
{ "MusicBrainz Album Id", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "MusicBrainz Release Group Id", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "MusicBrainz DiscID", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "CDDB DiscID", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "iTunes_CDDB_IDs", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "CATALOGNUMBER", 1, mfi_offsetof(songalbumid), parse_albumid },
{ "BARCODE", 1, mfi_offsetof(songalbumid), parse_albumid },
{ NULL, 0, 0, NULL }
};
static const struct metadata_map md_map_tv[] =
{
{ "stik", 1, mfi_offsetof(media_kind), NULL },
{ "show", 0, mfi_offsetof(tv_series_name), NULL },
{ "episode_id", 0, mfi_offsetof(tv_episode_num_str), NULL },
{ "network", 0, mfi_offsetof(tv_network_name), NULL },
{ "episode_sort", 1, mfi_offsetof(tv_episode_sort), NULL },
{ "season_number",1, mfi_offsetof(tv_season_num), NULL },
{ NULL, 0, 0, NULL }
};
/* NOTE about VORBIS comments:
* Only a small set of VORBIS comment fields are officially designated. Most
* common tags are at best de facto standards. Currently, metadata conversion
* functionality in ffmpeg only adds support for a couple of tags. Specifically,
* ALBUMARTIST and TRACKNUMBER are handled as of Feb 1, 2010 (rev 21587). Tags
* with names that already match the generic ffmpeg scheme--TITLE and ARTIST,
* for example--are of course handled. The rest of these tags are reported to
* have been used by various programs in the wild.
*/
static const struct metadata_map md_map_vorbis[] =
{
{ "albumartist", 0, mfi_offsetof(album_artist), NULL },
{ "album artist", 0, mfi_offsetof(album_artist), NULL },
{ "tracknumber", 1, mfi_offsetof(track), NULL },
{ "tracktotal", 1, mfi_offsetof(total_tracks), NULL },
{ "totaltracks", 1, mfi_offsetof(total_tracks), NULL },
{ "discnumber", 1, mfi_offsetof(disc), NULL },
{ "disctotal", 1, mfi_offsetof(total_discs), NULL },
{ "totaldiscs", 1, mfi_offsetof(total_discs), NULL },
{ NULL, 0, 0, NULL }
};
/* NOTE about ID3 tag names:
* metadata conversion for ID3v2 tags was added in ffmpeg in september 2009
* (rev 20073) for ID3v2.3; support for ID3v2.2 tag names was added in december
* 2009 (rev 20839).
*
* ID3v2.x tags will be removed from the map once a version of ffmpeg containing
* the changes listed above will be generally available. The more entries in the
* map, the slower the filescanner gets.
*
* Update 20180131: Removed tags supported by ffmpeg 2.5.4 (around 3 years old)
* + added some tags used for grouping
* Update 20200114: Removed TDA, TDAT, TYE, TYER, TDR since the they are
* well supported by ffmpeg, and forked-daapd was parsing TDA/TDAT incorrectly
*
*/
static const struct metadata_map md_map_id3[] =
{
{ "TT1", 0, mfi_offsetof(grouping), NULL }, /* ID3v2.2 */
{ "TIT1", 0, mfi_offsetof(grouping), NULL }, /* ID3v2.3 */
{ "GP1", 0, mfi_offsetof(grouping), NULL }, /* unofficial iTunes */
{ "GRP1", 0, mfi_offsetof(grouping), NULL }, /* unofficial iTunes */
{ "TCM", 0, mfi_offsetof(composer), NULL }, /* ID3v2.2 */
{ "TPA", 1, mfi_offsetof(disc), parse_disc }, /* ID3v2.2 */
{ "XSOA", 0, mfi_offsetof(album_sort), NULL }, /* ID3v2.3 */
{ "XSOP", 0, mfi_offsetof(artist_sort), NULL }, /* ID3v2.3 */
{ "XSOT", 0, mfi_offsetof(title_sort), NULL }, /* ID3v2.3 */
{ "TS2", 0, mfi_offsetof(album_artist_sort), NULL }, /* ID3v2.2 */
{ "TSO2", 0, mfi_offsetof(album_artist_sort), NULL }, /* ID3v2.3 */
{ "ALBUMARTISTSORT", 0, mfi_offsetof(album_artist_sort), NULL }, /* ID3v2.x */
{ "TSC", 0, mfi_offsetof(composer_sort), NULL }, /* ID3v2.2 */
{ "TSOC", 0, mfi_offsetof(composer_sort), NULL }, /* ID3v2.3 */
{ NULL, 0, 0, NULL }
};
static int
extract_metadata_core(struct media_file_info *mfi, AVDictionary *md, const struct metadata_map *md_map)
{
AVDictionaryEntry *mdt;
char **strval;
uint32_t *intval;
int mdcount;
int i;
int ret;
#if 0
/* Dump all the metadata reported by ffmpeg */
mdt = NULL;
while ((mdt = av_dict_get(md, "", mdt, AV_DICT_IGNORE_SUFFIX)) != NULL)
fprintf(stderr, " -> %s = %s\n", mdt->key, mdt->value);
#endif
mdcount = 0;
/* Extract actual metadata */
for (i = 0; md_map[i].key != NULL; i++)
{
mdt = av_dict_get(md, md_map[i].key, NULL, 0);
if (mdt == NULL)
continue;
if ((mdt->value == NULL) || (strlen(mdt->value) == 0))
continue;
if (md_map[i].handler_function)
{
mdcount += md_map[i].handler_function(mfi, mdt->value);
continue;
}
mdcount++;
if (!md_map[i].as_int)
{
strval = (char **) ((char *) mfi + md_map[i].offset);
if (*strval == NULL)
*strval = strdup(mdt->value);
}
else
{
intval = (uint32_t *) ((char *) mfi + md_map[i].offset);
if (*intval == 0)
{
ret = safe_atou32(mdt->value, intval);
if (ret < 0)
continue;
}
}
}
return mdcount;
}
static int
extract_metadata(struct media_file_info *mfi, AVFormatContext *ctx, AVStream *audio_stream, AVStream *video_stream, const struct metadata_map *md_map)
{
int mdcount;
int ret;
mdcount = 0;
if (ctx->metadata)
{
ret = extract_metadata_core(mfi, ctx->metadata, md_map);
mdcount += ret;
DPRINTF(E_DBG, L_SCAN, "Picked up %d tags from file metadata\n", ret);
}
if (audio_stream->metadata)
{
ret = extract_metadata_core(mfi, audio_stream->metadata, md_map);
mdcount += ret;
DPRINTF(E_DBG, L_SCAN, "Picked up %d tags from audio stream metadata\n", ret);
}
if (video_stream && video_stream->metadata)
{
ret = extract_metadata_core(mfi, video_stream->metadata, md_map);
mdcount += ret;
DPRINTF(E_DBG, L_SCAN, "Picked up %d tags from video stream metadata\n", ret);
}
return mdcount;
}
/*
* Fills metadata read with ffmpeg/libav from the given path into the given mfi
*
* Following attributes from the given mfi are read to control how to read metadata:
* - data_kind: if data_kind is http, icy metadata is used, if the path points to a playlist the first stream-uri in that playlist is used
* - media_kind: if media_kind is podcast or audiobook, video streams in the file are ignored
* - compilation: like podcast/audiobook video streams are ignored for compilations
* - file_size: if bitrate could not be read through ffmpeg/libav, file_size is used to estimate the bitrate
* - fname: (filename) used as fallback for artist
*/
int
scan_metadata_ffmpeg(struct media_file_info *mfi, const char *file)
{
AVFormatContext *ctx;
AVDictionary *options;
const struct metadata_map *extra_md_map;
struct http_icy_metadata *icy_metadata;
enum AVMediaType codec_type;
enum AVCodecID codec_id;
enum AVCodecID video_codec_id;
enum AVCodecID audio_codec_id;
enum AVSampleFormat sample_fmt;
AVStream *video_stream;
AVStream *audio_stream;
char *path;
int mdcount;
int sample_rate;
int channels;
int i;
int ret;
ctx = NULL;
options = NULL;
path = strdup(file);
if (mfi->data_kind == DATA_KIND_HTTP)
{
#ifndef HAVE_FFMPEG
// Without this, libav is slow to probe some internet streams
ctx = avformat_alloc_context();
ctx->probesize = 64000;
#endif
free(path);
ret = http_stream_setup(&path, file);
if (ret < 0)
return -1;
av_dict_set(&options, "icy", "1", 0);
mfi->artwork = ARTWORK_HTTP;
}
ret = avformat_open_input(&ctx, path, NULL, &options);
if (options)
av_dict_free(&options);
if (ret != 0)
{
DPRINTF(E_WARN, L_SCAN, "Cannot open media file '%s': %s\n", path, err2str(ret));
free(path);
return -1;
}
ret = avformat_find_stream_info(ctx, NULL);
if (ret < 0)
{
DPRINTF(E_WARN, L_SCAN, "Cannot get stream info of '%s': %s\n", path, err2str(ret));
avformat_close_input(&ctx);
free(path);
return -1;
}
free(path);
#if 0
/* Dump input format as determined by ffmpeg */
av_dump_format(ctx, 0, file, 0);
#endif
DPRINTF(E_DBG, L_SCAN, "File has %d streams\n", ctx->nb_streams);
/* Extract codec IDs, check for video */
video_codec_id = AV_CODEC_ID_NONE;
video_stream = NULL;
audio_codec_id = AV_CODEC_ID_NONE;
audio_stream = NULL;
for (i = 0; i < ctx->nb_streams; i++)
{
codec_type = ctx->streams[i]->codecpar->codec_type;
codec_id = ctx->streams[i]->codecpar->codec_id;
sample_rate = ctx->streams[i]->codecpar->sample_rate;
sample_fmt = ctx->streams[i]->codecpar->format;
channels = ctx->streams[i]->codecpar->channels;
switch (codec_type)
{
case AVMEDIA_TYPE_VIDEO:
if (ctx->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC)
{
DPRINTF(E_DBG, L_SCAN, "Found embedded artwork (stream %d)\n", i);
mfi->artwork = ARTWORK_EMBEDDED;
break;
}
// We treat these as audio no matter what
if (mfi->compilation || (mfi->media_kind & (MEDIA_KIND_PODCAST | MEDIA_KIND_AUDIOBOOK)))
break;
if (!video_stream)
{
DPRINTF(E_DBG, L_SCAN, "File has video (stream %d)\n", i);
video_stream = ctx->streams[i];
video_codec_id = codec_id;
mfi->has_video = 1;
}
break;
case AVMEDIA_TYPE_AUDIO:
if (!audio_stream)
{
audio_stream = ctx->streams[i];
audio_codec_id = codec_id;
mfi->samplerate = sample_rate;
mfi->bits_per_sample = 8 * av_get_bytes_per_sample(sample_fmt);
if (mfi->bits_per_sample == 0)
mfi->bits_per_sample = av_get_bits_per_sample(codec_id);
mfi->channels = channels;
}
break;
default:
break;
}
}
if (audio_codec_id == AV_CODEC_ID_NONE)
{
DPRINTF(E_DBG, L_SCAN, "File has no audio streams, discarding\n");
avformat_close_input(&ctx);
return -1;
}
/* Common media information */
if (ctx->duration > 0)
mfi->song_length = ctx->duration / (AV_TIME_BASE / 1000); /* ms */
if (ctx->bit_rate > 0)
mfi->bitrate = ctx->bit_rate / 1000;
else if (ctx->duration > AV_TIME_BASE) /* guesstimate */
mfi->bitrate = ((mfi->file_size * 8) / (ctx->duration / AV_TIME_BASE)) / 1000;
DPRINTF(E_DBG, L_SCAN, "Duration %d ms, bitrate %d kbps, samplerate %d channels %d\n", mfi->song_length, mfi->bitrate, mfi->samplerate, mfi->channels);
/* Try to extract ICY metadata if http stream */
if (mfi->data_kind == DATA_KIND_HTTP)
{
icy_metadata = http_icy_metadata_get(ctx, 0);
if (icy_metadata && icy_metadata->name)
{
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, name is '%s'\n", icy_metadata->name);
if (mfi->title)
free(mfi->title);
if (mfi->artist)
free(mfi->artist);
if (mfi->album_artist)
free(mfi->album_artist);
mfi->title = strdup(icy_metadata->name);
mfi->artist = strdup(icy_metadata->name);
mfi->album_artist = strdup(icy_metadata->name);
}
if (icy_metadata && icy_metadata->description)
{
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, description is '%s'\n", icy_metadata->description);
if (mfi->album)
free(mfi->album);
mfi->album = strdup(icy_metadata->description);
}
if (icy_metadata && icy_metadata->genre)
{
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, genre is '%s'\n", icy_metadata->genre);
if (mfi->genre)
free(mfi->genre);
mfi->genre = strdup(icy_metadata->genre);
}
if (icy_metadata)
http_icy_metadata_free(icy_metadata, 0);
}
/* Check codec */
extra_md_map = NULL;
codec_id = (mfi->has_video) ? video_codec_id : audio_codec_id;
switch (codec_id)
{
case AV_CODEC_ID_AAC:
DPRINTF(E_DBG, L_SCAN, "AAC\n");
mfi->type = strdup("m4a");
mfi->codectype = strdup("mp4a");
mfi->description = strdup("AAC audio file");
break;
case AV_CODEC_ID_ALAC:
DPRINTF(E_DBG, L_SCAN, "ALAC\n");
mfi->type = strdup("m4a");
mfi->codectype = strdup("alac");
mfi->description = strdup("Apple Lossless audio file");
break;
case AV_CODEC_ID_FLAC:
DPRINTF(E_DBG, L_SCAN, "FLAC\n");
mfi->type = strdup("flac");
mfi->codectype = strdup("flac");
mfi->description = strdup("FLAC audio file");
extra_md_map = md_map_vorbis;
break;
case AV_CODEC_ID_APE:
DPRINTF(E_DBG, L_SCAN, "APE\n");
mfi->type = strdup("ape");
mfi->codectype = strdup("ape");
mfi->description = strdup("Monkey's audio");
break;
case AV_CODEC_ID_MUSEPACK7:
case AV_CODEC_ID_MUSEPACK8:
DPRINTF(E_DBG, L_SCAN, "Musepack\n");
mfi->type = strdup("mpc");
mfi->codectype = strdup("mpc");
mfi->description = strdup("Musepack audio file");
break;
case AV_CODEC_ID_MPEG4: /* Video */
case AV_CODEC_ID_H264:
DPRINTF(E_DBG, L_SCAN, "MPEG4 video\n");
mfi->type = strdup("m4v");
mfi->codectype = strdup("mp4v");
mfi->description = strdup("MPEG-4 video file");
extra_md_map = md_map_tv;
break;
case AV_CODEC_ID_MP3:
DPRINTF(E_DBG, L_SCAN, "MP3\n");
mfi->type = strdup("mp3");
mfi->codectype = strdup("mpeg");
mfi->description = strdup("MPEG audio file");
extra_md_map = md_map_id3;
break;
case AV_CODEC_ID_VORBIS:
DPRINTF(E_DBG, L_SCAN, "VORBIS\n");
mfi->type = strdup("ogg");
mfi->codectype = strdup("ogg");
mfi->description = strdup("Ogg Vorbis audio file");
extra_md_map = md_map_vorbis;
break;
case AV_CODEC_ID_WMAV1:
case AV_CODEC_ID_WMAV2:
case AV_CODEC_ID_WMAVOICE:
DPRINTF(E_DBG, L_SCAN, "WMA Voice\n");
mfi->type = strdup("wma");
mfi->codectype = strdup("wmav");
mfi->description = strdup("WMA audio file");
break;
case AV_CODEC_ID_WMAPRO:
DPRINTF(E_DBG, L_SCAN, "WMA Pro\n");
mfi->type = strdup("wmap");
mfi->codectype = strdup("wma");
mfi->description = strdup("WMA audio file");
break;
case AV_CODEC_ID_WMALOSSLESS:
DPRINTF(E_DBG, L_SCAN, "WMA Lossless\n");
mfi->type = strdup("wma");
mfi->codectype = strdup("wmal");
mfi->description = strdup("WMA audio file");
break;
case AV_CODEC_ID_PCM_S16LE ... AV_CODEC_ID_PCM_F64LE:
if (strcmp(ctx->iformat->name, "aiff") == 0)
{
DPRINTF(E_DBG, L_SCAN, "AIFF\n");
mfi->type = strdup("aif");
mfi->codectype = strdup("aif");
mfi->description = strdup("AIFF audio file");
break;
}
else if (strcmp(ctx->iformat->name, "wav") == 0)
{
DPRINTF(E_DBG, L_SCAN, "WAV\n");
mfi->type = strdup("wav");
mfi->codectype = strdup("wav");
mfi->description = strdup("WAV audio file");
break;
}
/* WARNING: will fallthrough to default case, don't move */
/* FALLTHROUGH */
default:
DPRINTF(E_DBG, L_SCAN, "Unknown codec 0x%x (video: %s), format %s (%s)\n",
codec_id, (mfi->has_video) ? "yes" : "no", ctx->iformat->name, ctx->iformat->long_name);
mfi->type = strdup("unkn");
mfi->codectype = strdup("unkn");
if (mfi->has_video)
{
mfi->description = strdup("Unknown video file format");
extra_md_map = md_map_tv;
}
else
mfi->description = strdup("Unknown audio file format");
break;
}
mdcount = 0;
if ((!ctx->metadata) && (!audio_stream->metadata)
&& (video_stream && !video_stream->metadata))
{
DPRINTF(E_WARN, L_SCAN, "ffmpeg reports no metadata\n");
goto skip_extract;
}
if (extra_md_map)
{
ret = extract_metadata(mfi, ctx, audio_stream, video_stream, extra_md_map);
mdcount += ret;
DPRINTF(E_DBG, L_SCAN, "Picked up %d tags with extra md_map\n", ret);
}
ret = extract_metadata(mfi, ctx, audio_stream, video_stream, md_map_generic);
mdcount += ret;
DPRINTF(E_DBG, L_SCAN, "Picked up %d tags with generic md_map, %d tags total\n", ret, mdcount);
/* fix up TV metadata */
if (mfi->media_kind == 10)
{
/* I have no idea why this is, but iTunes reports a media kind of 64 for stik==10 (?!) */
mfi->media_kind = MEDIA_KIND_TVSHOW;
}
/* Unspecified video files are "Movies", media_kind 2 */
else if (mfi->has_video == 1)
{
mfi->media_kind = MEDIA_KIND_MOVIE;
}
skip_extract:
avformat_close_input(&ctx);
if (mdcount == 0)
DPRINTF(E_WARN, L_SCAN, "ffmpeg/libav could not extract any metadata\n");
/* Just in case there's no title set ... */
if (mfi->title == NULL)
mfi->title = strdup(mfi->fname);
/* All done */
return 0;
}
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