Commit Graph

5 Commits

Author SHA1 Message Date
Anton Khirnov
af1761f7b5 ffmpeg: init filtergraphs only after we have a frame on each input
This makes sure the actual stream parameters are used, which is
important mainly for hardware decoding+filtering cases, which would
previously require various weird workarounds to handle the fact that a
fake software graph has to be constructed, but never used.
This should also improve behaviour in rare cases where
avformat_find_stream_info() does not provide accurate information.

This merges Libav commit a3a0230. It was previously skipped.

The code in flush_encoders() which sets up a "fake" format wasn't in
Libav. I'm not sure if it's a good idea, but it tends to give
behavior closer to the old one in certain corner cases.

The vp8-size-change gives different result, because now the size of
the first frame is used. libavformat reported the size of the largest
frame for some reason.

The exr tests now use the sample aspect ratio of the first frame. For
some reason libavformat determines 0/1 as aspect ratio, while the
decoder returns the correct one.

The ffm and mxf tests change the field_order values. I'm assuming
another libavformat/decoding mismatch.

Signed-off-by: wm4 <nfxjfg@googlemail.com>
2017-03-03 08:45:43 +01:00
Zhengxu
1a79b8f8d2 ffmpeg: Add an option "qsv_device" to choose proper node for QSV child device (vaapi or dxva2)
Reason: For some cases, such as 2 or more graphics cards existing, the
default command line may fail because ffmpeg does not open the correct
device node:
    ffmpeg -hwaccel qsv -c:v h264_qsv -i test.264 -c:v h264_qsv out.264
Let user choose the proper one by running like below:
    ffmpeg -hwaccel qsv -qsv_device /dev/dri/renderD128 -c:v h264_qsv \
-i test.264 -c:v h264_qsv out.264

Signed-off-by: ChaoX A Liu <chaox.a.liu@gmail.com>
Signed-off-by: Huang, Zhengxu <zhengxu.maxwell@gmail.com>
Signed-off-by: Andrew, Zhang <huazh407@gmail.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>
2017-01-11 20:21:09 +00:00
Mark Thompson
03cef34aa6 ffmpeg_qsv: Fix hwaccel transcoding
Set up the encoder with a hardware context which will match the one
the decoder will use when it starts later.

Includes 02c2761973, with additional
hackery to get around a3a0230a98 being
skipped.
2016-11-13 17:49:48 +00:00
Jun Zhao
46bfc1562f ffmpeg/qsv: fix QSV-accelerated transcode performance drop issue.
the merge commit 1b04ea1 "avconv: create simple filtergraphs earlier"
will init the filtergraphs earlier, then init the QSV transcode can't
suppose the nb_filters's value, else lead to the QSV transcode performance
drop.

Signed-off-by: Jun Zhao <mypopydev@gmail.com>
Reviewed-by: Ivan Uskov <ivan.uskov@nablet.com
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2016-08-16 17:09:33 +02:00
Hendrik Leppkes
dd8a4b0f8c Merge commit 'fb472e1a11a4e0caed2c3c91da01ea8e35d9e3f8'
* commit 'fb472e1a11a4e0caed2c3c91da01ea8e35d9e3f8':
  avconv: add support for Intel QSV-accelerated transcoding

Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>
2015-10-22 16:18:02 +02:00