On 04/07/14 16:54, Luca Barbato wrote:
> The specification requires at most 1 track enable per alternate group.
> ---
> libavformat/movenc.c | 21 ++++++++++++++++-----
> libavformat/movenc.h | 2 ++
> 2 files changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> index f5c36fc..b0c380e 100644
> --- a/libavformat/movenc.c
> +++ b/libavformat/movenc.c
> @@ -1459,11 +1459,20 @@ static int mov_write_mdia_tag(AVIOContext *pb,
> MOVTrack *track)
> return update_size(pb, pos);
> }
>
> -static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack *track, AVStream *st)
> +static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
> + MOVTrack *track, AVStream *st)
> {
> int64_t duration = av_rescale_rnd(track->track_duration, MOV_TIMESCALE,
> track->timescale, AV_ROUND_UP);
> int version = duration < INT32_MAX ? 0 : 1;
> + int group = 0;
> +
> + if (st) {
> + if (mov->per_stream_grouping)
> + group = st->index;
> + else
> + group = st->codec->codec_type;
> + }
>
> if (track->mode == MODE_ISM)
> version = 1;
> @@ -1491,7 +1500,7 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack
> *track, AVStream *st)
> avio_wb32(pb, 0); /* reserved */
> avio_wb32(pb, 0); /* reserved */
> avio_wb16(pb, 0); /* layer */
> - avio_wb16(pb, st ? st->codec->codec_type : 0); /* alternate group) */
> + avio_wb16(pb, group); /* alternate group) */
> /* Volume, only for audio */
> if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
> avio_wb16(pb, 0x0100);
> @@ -1665,7 +1674,7 @@ static int mov_write_trak_tag(AVIOContext *pb,
> MOVMuxContext *mov,
> int64_t pos = avio_tell(pb);
> avio_wb32(pb, 0); /* size */
> ffio_wfourcc(pb, "trak");
> - mov_write_tkhd_tag(pb, track, st);
> + mov_write_tkhd_tag(pb, mov, track, st);
> if (track->mode == MODE_PSP || track->flags & MOV_TRACK_CTTS ||
> (track->entry && track->cluster[0].dts) ||
> is_clcp_track(track)) {
> @@ -3164,7 +3173,7 @@ static void enable_tracks(AVFormatContext *s)
> {
> MOVMuxContext *mov = s->priv_data;
> int i;
> - uint8_t enabled[AVMEDIA_TYPE_NB];
> + int enabled[AVMEDIA_TYPE_NB];
> int first[AVMEDIA_TYPE_NB];
>
> for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
> @@ -3183,7 +3192,7 @@ static void enable_tracks(AVFormatContext *s)
> first[st->codec->codec_type] = i;
> if (st->disposition & AV_DISPOSITION_DEFAULT) {
> mov->tracks[i].flags |= MOV_TRACK_ENABLED;
> - enabled[st->codec->codec_type] = 1;
> + enabled[st->codec->codec_type]++;
> }
> }
>
> @@ -3192,6 +3201,8 @@ static void enable_tracks(AVFormatContext *s)
> case AVMEDIA_TYPE_VIDEO:
> case AVMEDIA_TYPE_AUDIO:
> case AVMEDIA_TYPE_SUBTITLE:
> + if (enabled[i] > 1)
> + mov->per_stream_grouping = 1;
> if (!enabled[i] && first[i] >= 0)
> mov->tracks[first[i]].flags |= MOV_TRACK_ENABLED;
> break;
> diff --git a/libavformat/movenc.h b/libavformat/movenc.h
> index 3410080..35be781 100644
> --- a/libavformat/movenc.h
> +++ b/libavformat/movenc.h
> @@ -162,6 +162,8 @@ typedef struct MOVMuxContext {
> int64_t reserved_moov_pos;
>
> char *major_brand;
> +
> + int per_stream_grouping;
> } MOVMuxContext;
>
> #define FF_MOV_FLAG_RTP_HINT 1
>
ping.
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