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v4l2: use always channel 0 if driver does not return it. Always ignore device select / set errors

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boogie
2023-06-17 18:56:02 +02:00
committed by nyanmisaka
parent 4d2e94eb6d
commit 99a325f1f6
1 changed files with 6 additions and 3 deletions
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9
libavdevice/v4l2.c
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@@ -980,8 +980,11 @@ static int v4l2_read_header(AVFormatContext *ctx)
/* get current video input */
if (v4l2_ioctl(s->fd, VIDIOC_G_INPUT, &s->channel) < 0) {
res = AVERROR(errno);
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_G_INPUT): %s\n", av_err2str(res));
goto fail;
av_log(ctx, (s->ignore_input_error) ? AV_LOG_WARNING : AV_LOG_ERROR, "ioctl(VIDIOC_G_INPUT): %s\n", av_err2str(res));
if (!s->ignore_input_error)
goto fail;
else
s->channel = 0;
}
}
@@ -1216,7 +1219,7 @@ static const AVOption options[] = {
{ "pixel_format", "set preferred pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "input_format", "set preferred pixel format (for raw video) or codec name", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "ignore_input_error", "ignore input error", OFFSET(ignore_input_error), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, DEC },
{ "ignore_input_error", "ignore input error", OFFSET(ignore_input_error), AV_OPT_TYPE_BOOL, {.i64 = 1 }, 0, 1, DEC },
{ "list_formats", "list available formats and exit", OFFSET(list_format), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_formats" },
{ "all", "show all available formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_ALLFORMATS }, 0, INT_MAX, DEC, "list_formats" },