On Thu, 21 May 2020, Michael Niedermayer wrote:
On Wed, May 20, 2020 at 09:10:21AM +0300, Martin Storsjö wrote:
Sticking a full frame in the extradata works, as the code for writing
the avcC/hvcC extracts the relevant parameter set NAL units - provided
that they actually exist in the frame.
Some encoders don't provide split out extradata directly on init (or
at all). In particular, the MediaFoundation encoder wrapper doesn't
always (depending on the actual encoder device) - this is the case for
Qualcomm's HEVC encoder on SD835, and also on some QSV H264 encoders).
This only works for cases where the moov hasn't already been written
(e.g. when not writing fragmented mp4 with empty_moov, unless using
the delay_moov option).
Signed-off-by: Martin Storsjö <mar...@martin.st>
---
libavformat/movenc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 27d7621e27..6a85440a3f 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5584,7 +5584,9 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
if ((par->codec_id == AV_CODEC_ID_DNXHD ||
par->codec_id == AV_CODEC_ID_TRUEHD ||
- par->codec_id == AV_CODEC_ID_AC3) && !trk->vos_len) {
+ par->codec_id == AV_CODEC_ID_AC3 ||
+ par->codec_id == AV_CODEC_ID_H264 ||
+ par->codec_id == AV_CODEC_ID_HEVC) && !trk->vos_len) {
/* copy frame to create needed atoms */
trk->vos_len = size;
trk->vos_data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
This changes avcintra output
example testcase:
./ffmpeg -i ~/videos/mm-short.mpg -avcintra-class 100 -tune psnr -flags
+ildct-global_header -t 0.5 -pix_fmt yuv422p10 -vf scale=1920:1080 -an file.mov
Right, if explicitly disabling global headers on the encoder, this will
end up putting them back.
Any ideas on what the best path forward would be?
// Martin
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