[FFmpeg-cvslog] lavf: do not set codec_tag for rawvideo

[Mans Rullgard]

ffmpeg | branch: release/0.8 | Mans Rullgard <mans at mansr.com> | Sun Jul 17 16:02:33 2011 +0100| [e257eebd17fbb7e880cfdde8a80c089434b6cf1f] | committer: Reinhard Tartler

lavf: do not set codec_tag for rawvideo

If the demuxer did not set a codec_tag, there is none and
inventing one makes no sense.  This change stops the rawvideo
"decoder" over-writing user-supplied pixfmt with one derived
from the codec_tag.  The pixfmt-codec_tag-pixfmt round-trip
is lossy since several pixfmts map to the same codec_tag.

This fixes fate-lavf-pixfmt with avfilter disabled.

Signed-off-by: Mans Rullgard <mans at mansr.com>
(cherry picked from commit bb416bd68ca46b4a3f1901533064d56a6b8ac95e)

Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e257eebd17fbb7e880cfdde8a80c089434b6cf1f
---

 libavformat/utils.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index d9d154e..e3c7d4a 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2405,9 +2405,6 @@ int av_find_stream_info(AVFormatContext *ic)
                      (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
                       st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
-            if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
-                st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
-
             // the check for tb_unreliable() is not completely correct, since this is not about handling
             // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
             // ipmovie.c produces.