Consider edit rate when determining edit_units_per_packet and also make sure that checks are done in edit rate time base and not in stream time base.
Fixes some errors reported with the sample in ticket #5863. Signed-off-by: Marton Balint <c...@passwd.hu> --- libavformat/mxfdec.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index e0a4b5bd11..d4291f5dc7 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -275,7 +275,7 @@ typedef struct MXFContext { int parsing_backward; int64_t last_forward_tell; int last_forward_partition; - int current_edit_unit; + int64_t current_edit_unit; int nb_index_tables; MXFIndexTable *index_tables; int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom) @@ -2786,6 +2786,7 @@ static AVStream* mxf_get_opatom_stream(MXFContext *mxf) static void mxf_handle_small_eubc(AVFormatContext *s) { MXFContext *mxf = s->priv_data; + MXFTrack *track; /* assuming non-OPAtom == frame wrapped * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */ @@ -2805,7 +2806,8 @@ static void mxf_handle_small_eubc(AVFormatContext *s) /* TODO: We could compute this from the ratio between the audio * and video edit rates for 48 kHz NTSC we could use the * 1802-1802-1802-1802-1801 pattern. */ - mxf->edit_units_per_packet = 1920; + track = st->priv_data; + mxf->edit_units_per_packet = FFMAX(1, track->edit_rate.num / track->edit_rate.den / 25); } /** @@ -3263,7 +3265,7 @@ static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt) * truncate the packet since it's probably very large (>2 GiB is common) */ avpriv_request_sample(s, "OPAtom misinterpreted as OP1a? " - "KLV for edit unit %i extending into " + "KLV for edit unit %"PRId64" extending into " "next edit unit", mxf->current_edit_unit); klv.length = next_ofs - avio_tell(s->pb); @@ -3307,6 +3309,7 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) int64_t ret64, pos, next_pos; AVStream *st; MXFIndexTable *t; + MXFTrack *track; int edit_units; if (mxf->op != OPAtom) @@ -3317,14 +3320,16 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) if (!st) return AVERROR_EOF; + track = st->priv_data; + /* OPAtom - clip wrapped demuxing */ /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */ t = &mxf->index_tables[0]; - if (mxf->current_edit_unit >= st->duration) + if (mxf->current_edit_unit >= track->original_duration) return AVERROR_EOF; - edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit); + edit_units = FFMIN(mxf->edit_units_per_packet, track->original_duration - mxf->current_edit_unit); if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0) return ret; -- 2.13.6 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel