Round trip wav->mp3->wav now preserves the correct number of samples. Remuxing mp3->mp3 with -c:a copy also preserves any existing gapless metadata in the Info tag.
The code in libmp3lame.c to set AV_PKT_DATA_SKIP_SAMPLES was mostly copied from libopusenc.c. Jon Toohill (2): lavc/libmp3lame: send encoder delay/padding in packet side data lavf/mp3enc: write encoder delay/padding upon closing libavcodec/libmp3lame.c | 27 ++++++++++++++++++++++++++- libavformat/mp3enc.c | 34 ++++++++++++++++++++++++++++------ 2 files changed, 54 insertions(+), 7 deletions(-) -- 2.8.0.rc3.226.g39d4020 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel