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| author | Linjie Fu <linjie.justin.fu@gmail.com> | 2021-08-01 18:58:19 +0800 |
|---|---|---|
| committer | Linjie Fu <fulinjie@zju.edu.cn> | 2021-08-05 22:23:49 +0800 |
| commit | b3a0548a981db52911dd34d9de254c4fee0a8f79 (patch) | |
| tree | 79e8aff4bb166476ba5bd78eb0bf493e7ee3b099 /fftools/ffmpeg_filter.c | |
| parent | 5b0e6b0d82dfcc5c6b999e2678b52b0cff38ae0a (diff) | |
fftools/ffmpeg_filter: fix the flags parsing for scaler
Scaler relys on "-sws_flags" option to pass the flags to swscale
and scale filter. Currently passing "sws_flags=xxx" as a filter
option to scaler leads to an incorrect option parsing.
Check and change the string to "flags=xxx" and dumped flags information.
(Refer to parse_sws_flags())
CMD:
$ffmpeg -v verbose -i input.mp4 -sws_flags lanczos+bitexact+accurate_rnd \
-vf format=yuv420p,scale=800x600 -an -vframes 10 -f md5 -
Before:
[auto_scaler_0 @ 0x7f96c3808680] w:iw h:ih flags:'' interl:0
[auto_scaler_0 @ 0x7f96c3808680] w:1920 h:1080 fmt:yuvj420p sar:0/1 -> w:1920 h:1080 fmt:yuv420p sar:0/1 flags:0x0
[Parsed_scale_1 @ 0x7f96c3806e40] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800 h:600 fmt:yuv420p sar:0/1 flags:0x0
MD5=ff1d6091690c6fcd36d458d2a9f648ce
After:
[auto_scaler_0 @ 0x7fe94563b4c0] w:iw h:ih flags:'lanczos+bitexact+accurate_rnd' interl:0
[auto_scaler_0 @ 0x7fe94563b4c0] w:1920 h:1080 fmt:yuvj420p sar:0/1 -> w:1920 h:1080 fmt:yuv420p sar:0/1 flags:0xc0200
[Parsed_scale_1 @ 0x7fe945639d00] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800 h:600 fmt:yuv420p sar:0/1 flags:0xc0200
MD5=ff1d6091690c6fcd36d458d2a9f648ce
Signed-off-by: Linjie Fu <linjie.justin.fu@gmail.com>
Diffstat (limited to 'fftools/ffmpeg_filter.c')
| -rw-r--r-- | fftools/ffmpeg_filter.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c index 958d74f008..94838adc56 100644 --- a/fftools/ffmpeg_filter.c +++ b/fftools/ffmpeg_filter.c @@ -977,7 +977,11 @@ int configure_filtergraph(FilterGraph *fg) } if (strlen(args)) args[strlen(args)-1] = 0; - fg->graph->scale_sws_opts = av_strdup(args); + + if (!strncmp(args, "sws_flags=", 10)) { + // keep the 'flags=' part + fg->graph->scale_sws_opts = av_strdup(args+4); + } args[0] = 0; while ((e = av_dict_get(ost->swr_opts, "", e, |