Patches attached, ffmpeg.c should really not ignore initial padding
and trailing padding.
From 6fc1c0dfcfe5203355423d658f21a8f6c7cbfe83 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Thu, 12 Jan 2023 09:56:57 +0100
Subject: [PATCH 1/2] avformat/dtshddec: also read trailing padding in samples
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavformat/dtshddec.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libavformat/dtshddec.c b/libavformat/dtshddec.c
index edd02b4561..a3dea0668f 100644
--- a/libavformat/dtshddec.c
+++ b/libavformat/dtshddec.c
@@ -55,7 +55,7 @@ static int dtshd_read_header(AVFormatContext *s)
DTSHDDemuxContext *dtshd = s->priv_data;
AVIOContext *pb = s->pb;
uint64_t chunk_type, chunk_size;
- int64_t duration, data_start;
+ int64_t duration, orig_nb_samples, data_start;
AVStream *st;
int ret;
char *value;
@@ -103,9 +103,12 @@ static int dtshd_read_header(AVFormatContext *s)
duration = avio_rb32(pb); // num_frames
duration *= avio_rb16(pb); // samples_per_frames
st->duration = duration;
- avio_skip(pb, 5);
+ orig_nb_samples = avio_rb32(pb);
+ orig_nb_samples <<= 8;
+ orig_nb_samples |= avio_r8(pb);
st->codecpar->ch_layout.nb_channels = ff_dca_count_chs_for_mask(avio_rb16(pb));
st->codecpar->initial_padding = avio_rb16(pb);
+ st->codecpar->trailing_padding = FFMAX(st->duration - orig_nb_samples - st->codecpar->initial_padding, 0);
avio_skip(pb, chunk_size - 21);
break;
case FILEINFO:
--
2.37.2
From 65df8c3945445c0bf80e947b02ef57df7ee34bb5 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Thu, 12 Jan 2023 10:07:15 +0100
Subject: [PATCH 2/2] fftools/ffprobe: show trailing_padding too
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
fftools/ffprobe.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
index c18aee9846..30b786d074 100644
--- a/fftools/ffprobe.c
+++ b/fftools/ffprobe.c
@@ -3055,6 +3055,7 @@ static int show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_id
print_int("bits_per_sample", av_get_bits_per_sample(par->codec_id));
print_int("initial_padding", par->initial_padding);
+ print_int("trailing_padding", par->trailing_padding);
break;
case AVMEDIA_TYPE_SUBTITLE:
--
2.37.2
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