Without this change, the output pixel format from qsv decoder is always
'qsv' regardless of the hwaccel_output_format setting, user will get
errors when FFmpeg inserts an auto filter to convert 'qsv' format to the
specified format
Fox example:
ffmpeg -loglevel verbose -hwaccel qsv -c:v h264_qsv
-hwaccel_output_format yuv420p -i input.h264
-pix_fmt rgb24 -f null -
......
[graph 0 input from stream 0:0 @ 0x55c057c8f050] w:1280 h:720 pixfmt:qsv
tb:1/1001 fr:30000/1001 sar:1/1
[auto_scaler_0 @ 0x55c057c90d20] w:iw h:ih flags:'bicubic' interl:0
[format @ 0x55c057c8f990] auto-inserting filter 'auto_scaler_0' between
the filter 'Parsed_null_0' and the filter 'format'
Impossible to convert between the formats supported by the filter
'Parsed_null_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:
---
fftools/ffmpeg_opt.c | 6 ++++++
fftools/ffmpeg_qsv.c | 2 ++
2 files changed, 8 insertions(+)
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 19f719e3ff..6835affa3c 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -884,6 +884,12 @@ static void add_input_streams(OptionsContext *o,
AVFormatContext *ic)
"with old commandlines. This behaviour is DEPRECATED and
will be removed "
"in the future. Please explicitly set
\"-hwaccel_output_format cuda\".\n");
ist->hwaccel_output_format = AV_PIX_FMT_CUDA;
+ } else if (!hwaccel_output_format && hwaccel && !strcmp(hwaccel,
"qsv")) {
+ av_log(NULL, AV_LOG_WARNING,
+ "WARNING: defaulting hwaccel_output_format to qsv for
compatibility "
+ "with old commandlines. This behaviour is DEPRECATED and
will be removed "
+ "in the future. Please explicitly set
\"-hwaccel_output_format qsv\".\n");
+ ist->hwaccel_output_format = AV_PIX_FMT_QSV;
} else if (hwaccel_output_format) {
ist->hwaccel_output_format =
av_get_pix_fmt(hwaccel_output_format);
if (ist->hwaccel_output_format == AV_PIX_FMT_NONE) {
diff --git a/fftools/ffmpeg_qsv.c b/fftools/ffmpeg_qsv.c
index 960c88b69d..7f01370ada 100644
--- a/fftools/ffmpeg_qsv.c
+++ b/fftools/ffmpeg_qsv.c
@@ -82,6 +82,8 @@ int qsv_init(AVCodecContext *s)
return ret;
}
+ hwaccel_decode_init(s);
+
av_buffer_unref(&ist->hw_frames_ctx);
ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
if (!ist->hw_frames_ctx)
--
2.25.1
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