return size * 8 * track->timescale / track->track_duration;
}
+struct mpeg4_bit_rate_values {
+ uint32_t buffer_size; ///< Size of the decoding buffer for the elementary stream in bytes.
+ uint32_t max_bit_rate; ///< Maximum rate in bits/second over any window of one second.
+ uint32_t avg_bit_rate; ///< Average rate in bits/second over the entire presentation.
+};
+
+static struct mpeg4_bit_rate_values calculate_mpeg4_bit_rates(MOVTrack *track)
+{
+ AVCPBProperties *props = track->st ?
+ (AVCPBProperties*)av_stream_get_side_data(track->st,
+ AV_PKT_DATA_CPB_PROPERTIES,
+ NULL) :
+ NULL;
+ struct mpeg4_bit_rate_values bit_rates = { 0 };
+
+ bit_rates.avg_bit_rate = compute_avg_bitrate(track);
+ if (!bit_rates.avg_bit_rate) {
+ // if the average bit rate cannot be calculated at this point, such as
+ // in the case of fragmented MP4, utilize the following values as
+ // fall-back in priority order:
+ //
+ // 1. average bit rate property
+ // 2. bit rate (usually average over the whole clip)
+ // 3. maximum bit rate property
+
+ if (props && props->avg_bitrate) {
+ bit_rates.avg_bit_rate = props->avg_bitrate;
+ } else if (track->par->bit_rate) {
+ bit_rates.avg_bit_rate = track->par->bit_rate;
+ } else if (props && props->max_bitrate) {
+ bit_rates.avg_bit_rate = props->max_bitrate;
+ }
+ }
+
+ // (FIXME should be max rate in any 1 sec window)
+ bit_rates.max_bit_rate = FFMAX(track->par->bit_rate,
+ bit_rates.avg_bit_rate);
+
+ // utilize values from properties if we have them available
+ if (props) {
+ bit_rates.max_bit_rate = FFMAX(bit_rates.max_bit_rate,
+ props->max_bitrate);
+ bit_rates.buffer_size = props->buffer_size / 8;
+ }
+
+ return bit_rates;
+}
+
static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
{
- AVCPBProperties *props;
+ struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
int64_t pos = avio_tell(pb);
int decoder_specific_info_len = track->vos_len ? 5 + track->vos_len : 0;
- unsigned avg_bitrate;
avio_wb32(pb, 0); // size
ffio_wfourcc(pb, "esds");
else
avio_w8(pb, 0x11); // flags (= Visualstream)
- props = (AVCPBProperties*)av_stream_get_side_data(track->st, AV_PKT_DATA_CPB_PROPERTIES,
- NULL);
-
- avio_wb24(pb, props ? props->buffer_size / 8 : 0); // Buffersize DB
-
- avg_bitrate = compute_avg_bitrate(track);
- avio_wb32(pb, props ? FFMAX3(props->max_bitrate, props->avg_bitrate, avg_bitrate) : FFMAX(track->par->bit_rate, avg_bitrate)); // maxbitrate (FIXME should be max rate in any 1 sec window)
- avio_wb32(pb, avg_bitrate);
+ avio_wb24(pb, bit_rates.buffer_size); // Buffersize DB
+ avio_wb32(pb, bit_rates.max_bit_rate); // maxbitrate
+ avio_wb32(pb, bit_rates.avg_bit_rate);
if (track->vos_len) {
// DecoderSpecific info descriptor
return first_duration;
}
+static int mov_write_btrt_tag(AVIOContext *pb, MOVTrack *track)
+{
+ int64_t pos = avio_tell(pb);
+ struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
+ if (!bit_rates.max_bit_rate && !bit_rates.avg_bit_rate &&
+ !bit_rates.buffer_size)
+ // no useful data to be written, skip
+ return 0;
+
+ avio_wb32(pb, 0); /* size */
+ ffio_wfourcc(pb, "btrt");
+
+ avio_wb32(pb, bit_rates.buffer_size);
+ avio_wb32(pb, bit_rates.max_bit_rate);
+ avio_wb32(pb, bit_rates.avg_bit_rate);
+
+ return update_size(pb, pos);
+}
+
static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
return ret;
}
+ if (track->mode == MODE_MP4 &&
+ ((ret = mov_write_btrt_tag(pb, track)) < 0))
+ return ret;
+
ret = update_size(pb, pos);
return ret;
}
{
unsigned int tag = track->par->codec_tag;
+ // "rtp " is used to distinguish internally created RTP-hint tracks
+ // (with rtp_ctx) from other tracks.
+ if (tag == MKTAG('r','t','p',' '))
+ tag = 0;
if (!tag || (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL &&
(track->par->codec_id == AV_CODEC_ID_DVVIDEO ||
track->par->codec_id == AV_CODEC_ID_RAWVIDEO ||
static int mov_write_subtitle_tag(AVIOContext *pb, MOVTrack *track)
{
+ int ret = AVERROR_BUG;
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
avio_wl32(pb, track->tag); // store it byteswapped
else if (track->par->extradata_size)
avio_write(pb, track->par->extradata, track->par->extradata_size);
+ if (track->mode == MODE_MP4 &&
+ ((ret = mov_write_btrt_tag(pb, track)) < 0))
+ return ret;
+
return update_size(pb, pos);
}
static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
{
+ int ret = AVERROR_BUG;
int64_t pos = avio_tell(pb);
char compressor_name[32] = { 0 };
int avid = 0;
ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid);
}
+ if (track->mode == MODE_MP4 &&
+ ((ret = mov_write_btrt_tag(pb, track)) < 0))
+ return ret;
+
/* extra padding for avid stsd */
/* https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html#//apple_ref/doc/uid/TP40000939-CH204-61112 */
if (avid)
return update_size(pb, pos);
}
-static int64_t calc_pts_duration(MOVMuxContext *mov, MOVTrack *track)
+static void get_pts_range(MOVMuxContext *mov, MOVTrack *track,
+ int64_t *start, int64_t *end)
{
- if (track->tag == MKTAG('t','m','c','d')) {
+ if (track->tag == MKTAG('t','m','c','d') && mov->nb_meta_tmcd) {
// tmcd tracks gets track_duration set in mov_write_moov_tag from
// another track's duration, while the end_pts may be left at zero.
// Calculate the pts duration for that track instead.
- return av_rescale(calc_pts_duration(mov, &mov->tracks[track->src_track]),
- track->timescale, mov->tracks[track->src_track].timescale);
+ get_pts_range(mov, &mov->tracks[track->src_track], start, end);
+ *start = av_rescale(*start, track->timescale,
+ mov->tracks[track->src_track].timescale);
+ *end = av_rescale(*end, track->timescale,
+ mov->tracks[track->src_track].timescale);
+ return;
}
if (track->end_pts != AV_NOPTS_VALUE &&
track->start_dts != AV_NOPTS_VALUE &&
track->start_cts != AV_NOPTS_VALUE) {
- return track->end_pts - (track->start_dts + track->start_cts);
+ *start = track->start_dts + track->start_cts;
+ *end = track->end_pts;
+ return;
}
- return track->track_duration;
+ *start = 0;
+ *end = track->track_duration;
+}
+
+static int64_t calc_samples_pts_duration(MOVMuxContext *mov, MOVTrack *track)
+{
+ int64_t start, end;
+ get_pts_range(mov, track, &start, &end);
+ return end - start;
+}
+
+// Calculate the actual duration of the track, after edits.
+// If it starts with a pts < 0, that is removed by the edit list.
+// If it starts with a pts > 0, the edit list adds a delay before that.
+// Thus, with edit lists enabled, the post-edit output of the file is
+// starting with pts=0.
+static int64_t calc_pts_duration(MOVMuxContext *mov, MOVTrack *track)
+{
+ int64_t start, end;
+ get_pts_range(mov, track, &start, &end);
+ if (mov->use_editlist != 0)
+ start = 0;
+ return end - start;
}
static int mov_write_mdhd_tag(AVIOContext *pb, MOVMuxContext *mov,
static int mov_write_edts_tag(AVIOContext *pb, MOVMuxContext *mov,
MOVTrack *track)
{
- int64_t duration = av_rescale_rnd(calc_pts_duration(mov, track),
+ int64_t duration = av_rescale_rnd(calc_samples_pts_duration(mov, track),
MOV_TIMESCALE, track->timescale,
AV_ROUND_UP);
int version = duration < INT32_MAX ? 0 : 1;
{
int64_t pos = avio_tell(pb);
int i;
- int64_t manifest_bit_rate = 0;
- AVCPBProperties *props = NULL;
static const uint8_t uuid[] = {
0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
for (i = 0; i < mov->nb_streams; i++) {
MOVTrack *track = &mov->tracks[i];
+ struct mpeg4_bit_rate_values bit_rates =
+ calculate_mpeg4_bit_rates(track);
const char *type;
int track_id = track->track_id;
char track_name_buf[32] = { 0 };
continue;
}
- props = (AVCPBProperties*)av_stream_get_side_data(track->st, AV_PKT_DATA_CPB_PROPERTIES, NULL);
-
- if (track->par->bit_rate) {
- manifest_bit_rate = track->par->bit_rate;
- } else if (props) {
- manifest_bit_rate = props->max_bitrate;
- }
-
- avio_printf(pb, "<%s systemBitrate=\"%"PRId64"\">\n", type,
- manifest_bit_rate);
- param_write_int(pb, "systemBitrate", manifest_bit_rate);
+ avio_printf(pb, "<%s systemBitrate=\"%"PRIu32"\">\n", type,
+ bit_rates.avg_bit_rate);
+ param_write_int(pb, "systemBitrate", bit_rates.avg_bit_rate);
param_write_int(pb, "trackID", track_id);
param_write_string(pb, "systemLanguage", lang ? lang->value : "und");
static int mov_create_timecode_track(AVFormatContext *s, int index, int src_index, AVTimecode tc)
{
- int ret;
MOVMuxContext *mov = s->priv_data;
MOVTrack *track = &mov->tracks[index];
AVStream *src_st = s->streams[src_index];
- AVPacket pkt = {.stream_index = index, .flags = AV_PKT_FLAG_KEY, .size = 4};
+ uint8_t data[4];
+ AVPacket pkt = { .data = data, .stream_index = index,
+ .flags = AV_PKT_FLAG_KEY, .size = 4 };
AVRational rate = find_fps(s, src_st);
/* tmcd track based on video stream */
track->st->avg_frame_rate = av_inv_q(rate);
/* the tmcd track just contains one packet with the frame number */
- pkt.data = av_malloc(pkt.size);
- if (!pkt.data)
- return AVERROR(ENOMEM);
AV_WB32(pkt.data, tc.start);
- ret = ff_mov_write_packet(s, &pkt);
- av_free(pkt.data);
- return ret;
+ return ff_mov_write_packet(s, &pkt);
}
/*
MOVMuxContext *mov = s->priv_data;
int i;
+ if (!mov->tracks)
+ return;
+
if (mov->chapter_track) {
- if (mov->tracks[mov->chapter_track].par)
- av_freep(&mov->tracks[mov->chapter_track].par->extradata);
- av_freep(&mov->tracks[mov->chapter_track].par);
+ avcodec_parameters_free(&mov->tracks[mov->chapter_track].par);
}
for (i = 0; i < mov->nb_streams; i++) {
av_freep(&mov->tracks[i].vos_data);
ff_mov_cenc_free(&mov->tracks[i].cenc);
+ ffio_free_dyn_buf(&mov->tracks[i].mdat_buf);
}
av_freep(&mov->tracks);
+ ffio_free_dyn_buf(&mov->mdat_buf);
}
static uint32_t rgb_to_yuv(uint32_t rgb)
AVCodecParameters *par = track->par;
track->vos_len = par->extradata_size;
+ av_freep(&track->vos_data);
track->vos_data = av_malloc(track->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
if (!track->vos_data)
return AVERROR(ENOMEM);
{ AV_CODEC_ID_NONE, 0 },
};
-const AVCodecTag codec_mp4_tags[] = {
+static const AVCodecTag codec_mp4_tags[] = {
{ AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
{ AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
{ AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '3') },
{ AV_CODEC_ID_VP9, MKTAG('v', 'p', '0', '9') },
{ AV_CODEC_ID_AV1, MKTAG('a', 'v', '0', '1') },
{ AV_CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') },
+ { AV_CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') },
{ AV_CODEC_ID_MP4ALS, MKTAG('m', 'p', '4', 'a') },
{ AV_CODEC_ID_MP3, MKTAG('m', 'p', '4', 'a') },
{ AV_CODEC_ID_MP2, MKTAG('m', 'p', '4', 'a') },
{ AV_CODEC_ID_NONE, 0 },
};
-const AVCodecTag codec_ism_tags[] = {
+static const AVCodecTag codec_ism_tags[] = {
{ AV_CODEC_ID_WMAPRO , MKTAG('w', 'm', 'a', ' ') },
{ AV_CODEC_ID_NONE , 0 },
};
projects / ffmpeg / blobdiff