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Allow forcing a frame size in bytes for image2pipe.

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This allows decoding of concatenated frames encoded in
uncompressed formats like v210.
The frame size cannot be generally calculated, FFmpeg
also supports broken encoders.

Fixes ticket #1869.
This commit is contained in:
Carl Eugen Hoyos 2012-11-10 02:25:17 +01:00
parent f91f049a22
commit b56ff0b261
1 changed files with 7 additions and 1 deletions
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8
libavformat/img2dec.c
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@ -61,6 +61,7 @@ typedef struct {
#endif
int start_number;
int start_number_range;
int frame_size;
} VideoDemuxData;
static const int sizes[][2] = {
@ -372,7 +373,11 @@ static int read_packet(AVFormatContext *s1, AVPacket *pkt)
f[0] = s1->pb;
if (url_feof(f[0]))
return AVERROR(EIO);
size[0]= 4096;
if (s->frame_size > 0) {
size[0] = s->frame_size;
} else {
size[0]= 4096;
}
}
if (av_new_packet(pkt, size[0] + size[1] + size[2]) < 0)
@ -427,6 +432,7 @@ static const AVOption options[] = {
{ "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
{ "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
{ "video_size", "set video size", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
{ NULL },
};