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h264_metadata: Don't use inferred value of buffering frames 

Using the value of buffering frames inferred from the old level is
not a sensible approach when one wants to guess the level.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>
This commit is contained in:
Andreas Rheinhardt 2018-11-12 15:18:15 +01:00 committed by Mark Thompson
parent 959521b58d
commit 3c9c9b1568
1 changed files with 6 additions and 3 deletions
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9
libavcodec/h264_metadata_bsf.c
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@ -222,7 +222,7 @@ static int h264_metadata_update_sps(AVBSFContext *bsf,
if (ctx->level == LEVEL_AUTO) {
const H264LevelDescriptor *desc;
int64_t bit_rate;
int width, height;
int width, height, dpb_frames;
if (sps->vui.nal_hrd_parameters_present_flag) {
bit_rate = (sps->vui.nal_hrd_parameters.bit_rate_value_minus1[0] + 1) *
@ -236,13 +236,16 @@ static int h264_metadata_update_sps(AVBSFContext *bsf,
bit_rate = 0;
}
// Don't use max_dec_frame_buffering if it is only inferred.
dpb_frames = sps->vui.bitstream_restriction_flag ?
sps->vui.max_dec_frame_buffering : H264_MAX_DPB_FRAMES;
width = 16 * (sps->pic_width_in_mbs_minus1 + 1);
height = 16 * (sps->pic_height_in_map_units_minus1 + 1) *
(2 - sps->frame_mbs_only_flag);
desc = ff_h264_guess_level(sps->profile_idc, bit_rate,
width, height,
sps->vui.max_dec_frame_buffering);
width, height, dpb_frames);
if (desc) {
level_idc = desc->level_idc;
} else {