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ffmpeg
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vfwcap: add a framerate private option.

This commit is contained in:
Anton Khirnov 2011-05-24 21:16:47 +02:00
parent c21324eeb6
commit 4078ed2631
1 changed files with 10 additions and 6 deletions
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16
libavdevice/vfwcap.c
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@ -45,6 +45,7 @@ struct vfw_ctx {
unsigned int curbufsize;
unsigned int frame_num;
char *video_size; /**< A string describing video size, set by a private option. */
char *framerate; /**< Set by a private option. */
};
static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
@ -236,6 +237,7 @@ static int vfw_read_close(AVFormatContext *s)
}
av_freep(&ctx->video_size);
av_freep(&ctx->framerate);
return 0;
}
@ -252,6 +254,7 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
DWORD biCompression;
WORD biBitCount;
int ret;
AVRational fps;
if (!strcmp(s->filename, "list")) {
for (devnum = 0; devnum <= 9; devnum++) {
@ -269,10 +272,10 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
return AVERROR(EIO);
}
if(!ap->time_base.den) {
av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
return AVERROR(EIO);
}
#if FF_API_FORMAT_PARAMETERS
if (ap->time_base.num)
fps = (AVRational){ap->time_base.den, ap->time_base.num};
#endif
ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
if(!ctx->hwnd) {
@ -371,7 +374,7 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
cparms.fYield = 1; // Spawn a background thread
cparms.dwRequestMicroSecPerFrame =
(ap->time_base.num*1000000) / ap->time_base.den;
(fps.den*1000000) / fps.num;
cparms.fAbortLeftMouse = 0;
cparms.fAbortRightMouse = 0;
cparms.fCaptureAudio = 0;
@ -383,7 +386,7 @@ static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
goto fail_io;
codec = st->codec;
codec->time_base = ap->time_base;
codec->time_base = (AVRational){fps.den, fps.num};
codec->codec_type = AVMEDIA_TYPE_VIDEO;
codec->width = bi->bmiHeader.biWidth;
codec->height = bi->bmiHeader.biHeight;
@ -471,6 +474,7 @@ static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
{ NULL },
};