[FFmpeg-devel] [PATCH 2/3] libavcodec/vorbisenc: Add missing initial_padding

[Guangyu Sun]

Vorbis has priming samples at the beginning. If the initial_padding is not
set in the encoder, the total sample count will be one frame fewer than it
should be. The result is that we get a truncated version of encoding.

initial_padding should be set to the frame_size used in
vorbis_encode_frame().

Signed-off-by: Guangyu Sun <gsun at roblox.com>
---
 libavcodec/vorbisenc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/vorbisenc.c b/libavcodec/vorbisenc.c
index 332c09f9a1..72c6ba1130 100644
--- a/libavcodec/vorbisenc.c
+++ b/libavcodec/vorbisenc.c
@@ -1287,6 +1287,7 @@ static av_cold int vorbis_encode_init(AVCodecContext *avctx)
     avctx->extradata_size = ret;
 
     avctx->frame_size = 64;
+    avctx->initial_padding = 1 << (venc->log2_blocksize[1] - 1);
 
     ff_af_queue_init(avctx, &venc->afq);
 
-- 
2.30.1