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v4l2: do not force interlaced mode 

Video4linux2 supports both interlaced and non-interlaced mode, do not
ask for interlaced if not necessary.
This commit is contained in:
Luca Barbato 2011-11-21 17:03:46 +01:00
parent a2d1d21629
commit af7123b2ad
1 changed files with 8 additions and 2 deletions
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10
libavdevice/v4l2.c
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@ -64,6 +64,7 @@ struct video_data {
enum io_method io_method;
int width, height;
int frame_size;
int interlaced;
int top_field_first;
int buffers;
@ -162,7 +163,7 @@ static int device_init(AVFormatContext *ctx, int *width, int *height, uint32_t p
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
fmt.fmt.pix.pixelformat = pix_fmt;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
fmt.fmt.pix.field = V4L2_FIELD_ANY;
res = ioctl(fd, VIDIOC_S_FMT, &fmt);
if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
av_log(ctx, AV_LOG_INFO, "The V4L2 driver changed the video from %dx%d to %dx%d\n", *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
@ -175,6 +176,11 @@ static int device_init(AVFormatContext *ctx, int *width, int *height, uint32_t p
res = -1;
}
if (fmt.fmt.pix.field == V4L2_FIELD_INTERLACED) {
av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver using the interlaced mode");
s->interlaced = 1;
}
return res;
}
@ -686,7 +692,7 @@ static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)
return res;
}
if (s1->streams[0]->codec->coded_frame) {
if (s1->streams[0]->codec->coded_frame && s->interlaced) {
s1->streams[0]->codec->coded_frame->interlaced_frame = 1;
s1->streams[0]->codec->coded_frame->top_field_first = s->top_field_first;
}