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avcodec/mediacodecenc: add pts_as_dts option 

It works since most of Android devices don't output B frames by
default. The behavior is documented by Android now, although there
is some exception in history, which should have been fixed now.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2022-12-07 17:31:22 +08:00
parent a86bb1d2ce
commit 10a56363a7
2 changed files with 9 additions and 1 deletions
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8
libavcodec/mediacodecenc.c
View File

@ -71,6 +71,7 @@ typedef struct MediaCodecEncContext {
int bitrate_mode;
int level;
int pts_as_dts;
} MediaCodecEncContext;
enum {
@ -277,6 +278,8 @@ static av_cold int mediacodec_init(AVCodecContext *avctx)
}
if (avctx->max_b_frames > 0)
ff_AMediaFormat_setInt32(format, "max-bframes", avctx->max_b_frames);
if (s->pts_as_dts == -1)
s->pts_as_dts = avctx->max_b_frames <= 0;
ret = ff_AMediaCodec_getConfigureFlagEncode(s->codec);
ret = ff_AMediaCodec_configure(s->codec, format, s->window, NULL, ret);
@ -369,6 +372,8 @@ static int mediacodec_receive(AVCodecContext *avctx,
}
memcpy(pkt->data + extradata_size, out_buf + out_info.offset, out_info.size);
pkt->pts = av_rescale_q(out_info.presentationTimeUs, AV_TIME_BASE_Q, avctx->time_base);
if (s->pts_as_dts)
pkt->dts = pkt->pts;
if (out_info.flags & ff_AMediaCodec_getBufferFlagKeyFrame(codec))
pkt->flags |= AV_PKT_FLAG_KEY;
ret = 0;
@ -559,6 +564,9 @@ static const AVCodecHWConfigInternal *const mediacodec_hw_configs[] = {
0, AV_OPT_TYPE_CONST, {.i64 = BITRATE_MODE_CBR}, 0, 0, VE, "bitrate_mode" }, \
{ "cbr_fd", "Constant bitrate mode with frame drops", \
0, AV_OPT_TYPE_CONST, {.i64 = BITRATE_MODE_CBR_FD}, 0, 0, VE, "bitrate_mode" }, \
{ "pts_as_dts", "Use PTS as DTS. It is enabled automatically if avctx max_b_frames <= 0, " \
"since most of Android devices don't output B frames by default.", \
OFFSET(pts_as_dts), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE }, \
#define MEDIACODEC_ENCODER_CLASS(name) \

2
libavcodec/version.h
View File

@ -30,7 +30,7 @@
#include "version_major.h"
#define LIBAVCODEC_VERSION_MINOR 55
#define LIBAVCODEC_VERSION_MICRO 102
#define LIBAVCODEC_VERSION_MICRO 103
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \