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lavf/id3v2enc: fix cover art display on some software

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Adding an arbitrary amount of padding bytes at the end of the
ID3 metadata fixes cover art display for some software (iTunes,
Traktor, Serato, Torq).

For reference (ID3 metadata):

[ Apic frames ]                      -> cover doesn't show up
[ Apic frames, Padding ]             -> ok
[ Apic frames, ID3 frames ]          -> ok
[ ID3 frames, Apic frames ]          -> cover doesn't show up
[ ID3 frames, Apic frames, Padding ] -> ok
This commit is contained in:
Matthieu Bouron 2013-05-29 12:05:26 +02:00 committed by Paul B Mahol
parent c4e0e31424
commit f468325d34
3 changed files with 15 additions and 4 deletions
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13
libavformat/id3v2enc.c
View File

@ -26,8 +26,11 @@
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include "avio_internal.h"
#include "id3v2.h"
#define PADDING_BYTES 10
static void id3v2_put_size(AVIOContext *pb, int size)
{
avio_w8(pb, size >> 21 & 0x7f);
@ -319,7 +322,15 @@ int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt)
void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb)
{
int64_t cur_pos = avio_tell(pb);
int64_t cur_pos;
/* adding an arbitrary amount of padding bytes at the end of the
* ID3 metadata fixes cover art display for some software (iTunes,
* Traktor, Serato, Torq) */
ffio_fill(pb, 0, PADDING_BYTES);
id3->len += PADDING_BYTES;
cur_pos = avio_tell(pb);
avio_seek(pb, id3->size_pos, SEEK_SET);
id3v2_put_size(pb, id3->len);
avio_seek(pb, cur_pos, SEEK_SET);

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 8
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_MICRO 102
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \

4
tests/ref/lavf-fate/mp3
View File

@ -1,3 +1,3 @@
7fcf80c2059b5c058a6cdd2e2f798b6c *./tests/data/lavf-fate/lavf.mp3
96366 ./tests/data/lavf-fate/lavf.mp3
6bdea919dc6856d76ef2553698e2b0d3 *./tests/data/lavf-fate/lavf.mp3
96376 ./tests/data/lavf-fate/lavf.mp3
./tests/data/lavf-fate/lavf.mp3 CRC=0x6c9850fe