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vqa: set time base to frame rate as coded in the header.

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According to Multimedia Wiki documentation, the frame rate is not always 15,
and the actual value can be found in the header.
This commit is contained in:
Justin Ruggles 2012-01-23 11:38:00 -05:00
parent 9ae846971f
commit 5b4c562897
1 changed files with 7 additions and 2 deletions
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9
libavformat/westwood_vqa.c
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@ -51,7 +51,6 @@
#define CMDS_TAG MKBETAG('C', 'M', 'D', 'S')
#define VQA_HEADER_SIZE 0x2A
#define VQA_FRAMERATE 15
#define VQA_PREAMBLE_SIZE 8
typedef struct WsVqaDemuxContext {
@ -87,13 +86,13 @@ static int wsvqa_read_header(AVFormatContext *s,
unsigned char scratch[VQA_PREAMBLE_SIZE];
unsigned int chunk_tag;
unsigned int chunk_size;
int fps;
/* initialize the video decoder stream */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->start_time = 0;
avpriv_set_pts_info(st, 33, 1, VQA_FRAMERATE);
wsvqa->video_stream_index = st->index;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_WS_VQA;
@ -113,6 +112,12 @@ static int wsvqa_read_header(AVFormatContext *s,
}
st->codec->width = AV_RL16(&header[6]);
st->codec->height = AV_RL16(&header[8]);
fps = header[12];
if (fps < 1 || fps > 30) {
av_log(s, AV_LOG_ERROR, "invalid fps: %d\n", fps);
return AVERROR_INVALIDDATA;
}
avpriv_set_pts_info(st, 64, 1, fps);
/* initialize the audio decoder stream for VQA v1 or nonzero samplerate */
if (AV_RL16(&header[24]) || (AV_RL16(&header[0]) == 1 && AV_RL16(&header[2]) == 1)) {