On Tue, 1 May 2018 11:47:04 +0200
Paul B Mahol <one...@gmail.com> wrote:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> libavformat/yuv4mpegdec.c | 23 ++++----------------
> tests/ref/seek/lavf-yuv4mpeg | 52
> ++++++++++++++++++++------------------------
> 2 files changed, 28 insertions(+), 47 deletions(-)
>
> diff --git a/libavformat/yuv4mpegdec.c b/libavformat/yuv4mpegdec.c
> index 8662a42a4c..cf6da2a2ef 100644
> --- a/libavformat/yuv4mpegdec.c
> +++ b/libavformat/yuv4mpegdec.c
> @@ -306,28 +306,13 @@ static int yuv4_read_packet(AVFormatContext *s,
> AVPacket *pkt)
> return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
> }
> pkt->stream_index = 0;
> - pkt->pts = (off - s->internal->data_offset) / s->packet_size;
> + pkt->pos = off;
> + pkt->dts = pkt->pts = (off - s->internal->data_offset) / s->packet_size;
> + pkt->flags |= AV_PKT_FLAG_KEY;
> pkt->duration = 1;
> return 0;
> }
>
> -static int yuv4_read_seek(AVFormatContext *s, int stream_index,
> - int64_t pts, int flags)
> -{
> - AVStream *st = s->streams[0];
> - int64_t pos;
> -
> - pos = av_rescale_rnd(pts * s->packet_size,
> - st->time_base.num,
> - st->time_base.den * s->packet_size,
> - (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN :
> AV_ROUND_UP);
> - pos *= s->packet_size;
> -
> - if (avio_seek(s->pb, pos + s->internal->data_offset, SEEK_SET) < 0)
> - return -1;
> - return 0;
> -}
> -
> static int yuv4_probe(AVProbeData *pd)
> {
> /* check file header */
> @@ -343,6 +328,6 @@ AVInputFormat ff_yuv4mpegpipe_demuxer = {
> .read_probe = yuv4_probe,
> .read_header = yuv4_read_header,
> .read_packet = yuv4_read_packet,
> - .read_seek = yuv4_read_seek,
> .extensions = "y4m",
> + .flags = AVFMT_GENERIC_INDEX,
> };
> diff --git a/tests/ref/seek/lavf-yuv4mpeg b/tests/ref/seek/lavf-yuv4mpeg
Seems like a bad idea. This will make seeking read and skip all data
when seeking to the middle of the stream, instead of just seeking there.
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