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lavf/id3v2enc: fix cover art display on some software 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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