ffmpeg | branch: master | Rick Kern <ker...@gmail.com> | Sun May 12 16:01:50 
2019 -0400| [247bda442f51ee5c330bab1489c5a1edd875b53d] | committer: Rick Kern

lavc/videotoolboxenc: add require_sw option to force software encoding.

Signed-off-by: Rick Kern <ker...@gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=247bda442f51ee5c330bab1489c5a1edd875b53d
---

 libavcodec/videotoolboxenc.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index 50aba2d87f..9e82f700f0 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -210,6 +210,7 @@ typedef struct VTEncContext {
     int64_t frames_after;
 
     int64_t allow_sw;
+    int64_t require_sw;
 
     bool flushing;
     bool has_b_frames;
@@ -1314,7 +1315,11 @@ static int vtenc_configure_encoder(AVCodecContext *avctx)
     if (!enc_info) return AVERROR(ENOMEM);
 
 #if !TARGET_OS_IPHONE
-    if (!vtctx->allow_sw) {
+    if(vtctx->require_sw) {
+        CFDictionarySetValue(enc_info,
+                             
compat_keys.kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
+                             kCFBooleanFalse);
+    } else if (!vtctx->allow_sw) {
         CFDictionarySetValue(enc_info,
                              
compat_keys.kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder,
                              kCFBooleanTrue);
@@ -2543,6 +2548,8 @@ static const enum AVPixelFormat pix_fmts[] = {
 #define COMMON_OPTIONS \
     { "allow_sw", "Allow software encoding", OFFSET(allow_sw), 
AV_OPT_TYPE_BOOL, \
         { .i64 = 0 }, 0, 1, VE }, \
+    { "require_sw", "Require software encoding", OFFSET(require_sw), 
AV_OPT_TYPE_BOOL, \
+        { .i64 = 0 }, 0, 1, VE }, \
     { "realtime", "Hint that encoding should happen in real-time if not faster 
(e.g. capturing from camera).", \
         OFFSET(realtime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
     { "frames_before", "Other frames will come before the frames in this 
session. This helps smooth concatenation issues.", \

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