[FFmpeg-cvslog] Read h264 headers from v4l2 to allow stream-copying.

[Carl Eugen Hoyos]

ffmpeg | branch: release/1.2 | Carl Eugen Hoyos <cehoyos at ag.or.at> | Sun Sep  1 20:20:47 2013 +0200| [06a927a6b5343b1cff5d09a0c4d525adbfea901c] | committer: Carl Eugen Hoyos

Read h264 headers from v4l2 to allow stream-copying.

Fixes ticket #2882.
Analyzed and tested by William C Bonner.
(cherry picked from commit e337c9d56408dc00a15887309488a1ff5cb06ba3)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=06a927a6b5343b1cff5d09a0c4d525adbfea901c
---

 libavdevice/v4l2.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 6726b0b..049f0bd 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -985,6 +985,9 @@ static int v4l2_read_header(AVFormatContext *s1)
     if (codec_id == AV_CODEC_ID_RAWVIDEO)
         st->codec->codec_tag =
             avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
+    else if (codec_id == AV_CODEC_ID_H264) {
+        st->need_parsing = AVSTREAM_PARSE_HEADERS;
+    }
     if (desired_format == V4L2_PIX_FMT_YVU420)
         st->codec->codec_tag = MKTAG('Y', 'V', '1', '2');
     else if (desired_format == V4L2_PIX_FMT_YVU410)