[FFmpeg-devel] [PATCH 1/2] img2: added support for %t output pattern
James Almer
jamrial at gmail.com
Tue Nov 15 20:59:48 EET 2016
On 11/10/2016 4:26 PM, Roger Pack wrote:
> On 11/1/16, James Almer <jamrial at gmail.com> wrote:
>> > On 11/1/2016 6:43 PM, James Almer wrote:
>>> >> On 10/25/2016 9:38 PM, Roger Pack wrote:
>>>> >>> From e8cac5c7de18766ce0f8f286f7dc140b82129df2 Mon Sep 17 00:00:00 2001
>>>> >>> From: rogerdpack <rogerpack2005 at gmail.com>
>>>> >>> Date: Tue, 25 Oct 2016 18:33:12 -0600
>>>> >>> Subject: [PATCH 1/2] img2 encoder: allow %t in filename, based on patch
>>>> >>> from
>>>> >>> Yuval Adam
>>>> >>>
>>>> >>> Signed-off-by: rogerdpack <rogerpack2005 at gmail.com>
>>>> >>> ---
>>>> >>> doc/muxers.texi | 13 +++++++++++++
>>>> >>> libavformat/avformat.h | 3 ++-
>>>> >>> libavformat/hlsenc.c | 6 +++---
>>>> >>> libavformat/img2enc.c | 6 ++++--
>>>> >>> libavformat/utils.c | 42 ++++++++++++++++++++++++++++++++++++++----
>>>> >>> 5 files changed, 60 insertions(+), 10 deletions(-)
>>>> >>>
>>>> >>> diff --git a/doc/muxers.texi b/doc/muxers.texi
>>>> >>> index 0d856db..0c3a198 100644
>>>> >>> --- a/doc/muxers.texi
>>>> >>> +++ b/doc/muxers.texi
>>>> >>> @@ -619,6 +619,12 @@ If the pattern contains "%d" or "%0 at var{N}d", the
>>>> >>> first filename of
>>>> >>> the file list specified will contain the number 1, all the following
>>>> >>> numbers will be sequential.
>>>> >>>
>>>> >>> +If the pattern contains "%t", the frame's timestamps will be inserted
>>>> >>> +in the filename like "00.00.00.000" for hours, minutes, seconds,
>>>> >>> +and milliseconds.
>>>> >>> +
>>>> >>> +The "%t" and "%d" patterns may be used simultaneously.
>>>> >>> +
>>>> >>> The pattern may contain a suffix which is used to automatically
>>>> >>> determine the format of the image files to write.
>>>> >>>
>>>> >>> @@ -664,6 +670,13 @@ can be used:
>>>> >>> ffmpeg -f v4l2 -r 1 -i /dev/video0 -f image2 -strftime 1
>>>> >>> "%Y-%m-%d_%H-%M-%S.jpg"
>>>> >>> @end example
>>>> >>>
>>>> >>> +The following example uses the timestamp parameter to generate one
>>>> >>> +image file per video frame from the input, and name it including its
>>>> >>> original
>>>> >>> +timestamp.
>>>> >>> + at example
>>>> >>> +ffmpeg -i in.avi -vsync vfr -copyts img-%t.jpg
>>>> >>> + at end example
>>>> >>> +
>>>> >>> @subsection Options
>>>> >>>
>>>> >>> @table @option
>>>> >>> diff --git a/libavformat/avformat.h b/libavformat/avformat.h
>>>> >>> index f9f4d72..7f39698 100644
>>>> >>> --- a/libavformat/avformat.h
>>>> >>> +++ b/libavformat/avformat.h
>>>> >>> @@ -2780,10 +2780,11 @@ void av_dump_format(AVFormatContext *ic,
>>>> >>> * @param path numbered sequence string
>>>> >>> * @param number frame number
>>>> >>> * @param flags AV_FRAME_FILENAME_FLAGS_*
>>>> >>> + * @param ts frame timestamp in AV_TIME_BASE fractional seconds.
>>>> >>> * @return 0 if OK, -1 on format error
>>>> >>> */
>>>> >>> int av_get_frame_filename2(char *buf, int buf_size,
>>>> >>> - const char *path, int number, int flags);
>>>> >>> + const char *path, int number, int flags,
>>>> >>> int64_t ts);
>>> >>
>>> >> Uhh, what? did you just break API modifying a public function?
>>> >>
>> >
>> > For the record, this was reverted.
>> >
>> > Shouldn't be hard to solve, i think. Just add a new ff_get_frame_filename()
>> > function to internal.h with this new signature, at least for now and for
>> > this
>> > feature, to avoid adding a third public function doing the same thing unless
>> > absolutely necessary.
> OK see attached. Wasn't sure if I should duplicate docs or not, feel
> free to modify.
> Cheers!
> -roger-
>
>
> 0001-img2-encoder-allow-t-in-filepattern-based-on-patch-f.patch
>
>
> From 8287f1ca543f764e9e88659ee5a07873860d607d Mon Sep 17 00:00:00 2001
> From: rogerdpack <rogerpack2005 at gmail.com>
> Date: Thu, 10 Nov 2016 12:24:49 -0700
> Subject: [PATCH] img2 encoder: allow %t in filepattern, based on patch from
> Yuval Adam
>
> Signed-off-by: rogerdpack <rogerpack2005 at gmail.com>
> ---
> doc/muxers.texi | 13 +++++++++++++
> libavformat/img2enc.c | 8 +++++---
> libavformat/internal.h | 18 ++++++++++++++++++
> libavformat/utils.c | 45 ++++++++++++++++++++++++++++++++++++++++++---
> 4 files changed, 78 insertions(+), 6 deletions(-)
No hlsenc.c?
>
> diff --git a/doc/muxers.texi b/doc/muxers.texi
> index 806182a..670fcca 100644
> --- a/doc/muxers.texi
> +++ b/doc/muxers.texi
> @@ -622,6 +622,12 @@ If the pattern contains "%d" or "%0 at var{N}d", the first filename of
> the file list specified will contain the number 1, all the following
> numbers will be sequential.
>
> +If the pattern contains "%t", the frame's timestamps will be inserted
> +in the filename like "00.00.00.000" for hours, minutes, seconds,
> +and milliseconds.
> +
> +The "%t" and "%d" patterns may be used simultaneously.
> +
> The pattern may contain a suffix which is used to automatically
> determine the format of the image files to write.
>
> @@ -667,6 +673,13 @@ can be used:
> ffmpeg -f v4l2 -r 1 -i /dev/video0 -f image2 -strftime 1 "%Y-%m-%d_%H-%M-%S.jpg"
> @end example
>
> +The following example uses the timestamp parameter to generate one
> +image file per video frame from the input, and name it including its original
> +timestamp.
> + at example
> +ffmpeg -i in.avi -vsync vfr -copyts img-%t.jpg
> + at end example
> +
> @subsection Options
>
> @table @option
> diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c
> index 1297b1a..651739e 100644
> --- a/libavformat/img2enc.c
> +++ b/libavformat/img2enc.c
> @@ -80,10 +80,12 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
> VideoMuxData *img = s->priv_data;
> AVIOContext *pb[4];
> char filename[1024];
> - AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
> + AVStream *stream = s->streams[ pkt->stream_index ];
> + AVCodecParameters *par = stream->codecpar;
> const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(par->format);
> int i;
> int nb_renames = 0;
> + int64_t ts = av_rescale_q(pkt->pts, stream->time_base, AV_TIME_BASE_Q);
>
> if (!img->is_pipe) {
> if (img->update) {
> @@ -97,9 +99,9 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
> av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
> return AVERROR(EINVAL);
> }
> - } else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
> + } else if (av_get_frame_filename3(filename, sizeof(filename), img->path,
> img->img_number,
> - AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
> + AV_FRAME_FILENAME_FLAGS_MULTIPLE, ts) < 0 &&
> img->img_number > 1) {
> av_log(s, AV_LOG_ERROR,
> "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
> diff --git a/libavformat/internal.h b/libavformat/internal.h
> index da64c64..d7174c5 100644
> --- a/libavformat/internal.h
> +++ b/libavformat/internal.h
> @@ -356,6 +356,24 @@ void ff_reduce_index(AVFormatContext *s, int stream_index);
> enum AVCodecID ff_guess_image2_codec(const char *filename);
>
> /**
> + * Return in 'buf' the path with '%d' replaced by a number.
> + *
> + * Also handles the '%0nd' format where 'n' is the total number
> + * of digits and '%%'.
> + * Also handles the '%t' format where 't' is the timestamp.
> + *
> + * @param buf destination buffer
> + * @param buf_size destination buffer size
> + * @param path numbered sequence string
> + * @param number frame number
> + * @param flags AV_FRAME_FILENAME_FLAGS_*
> + * @param ts frame timestamp in AV_TIME_BASE fractional seconds.
> + * @return 0 if OK, -1 on format error
> + */
> +int av_get_frame_filename3(char *buf, int buf_size,
Since it's internal it needs to have an ff_ prefix, not av_.
No comments about the code itself. If it's the same as the already
reviewed version then it should be good.
> + const char *path, int number, int flags, int64_t ts);
> +
> +/**
> * Perform a binary search using av_index_search_timestamp() and
> * AVInputFormat.read_timestamp().
> *
> diff --git a/libavformat/utils.c b/libavformat/utils.c
> index 5664646..ba8707e 100644
> --- a/libavformat/utils.c
> +++ b/libavformat/utils.c
> @@ -4391,15 +4391,18 @@ uint64_t ff_ntp_time(void)
> return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
> }
>
> -int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
> +int av_get_frame_filename3(char *buf, int buf_size, const char *path, int number, int flags, int64_t ts)
> {
> const char *p;
> char *q, buf1[20], c;
> - int nd, len, percentd_found;
> + int nd, len, percentd_found, percentt_found;
> + int hours, mins, secs, ms;
> + int64_t abs_ts;
>
> q = buf;
> p = path;
> percentd_found = 0;
> + percentt_found = 0;
> for (;;) {
> c = *p++;
> if (c == '\0')
> @@ -4428,6 +4431,37 @@ int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number
> memcpy(q, buf1, len);
> q += len;
> break;
> + case 't':
> + if (!(flags & AV_FRAME_FILENAME_FLAGS_MULTIPLE) && percentt_found) {
> + av_log(NULL, AV_LOG_ERROR, "double %%t not allowed");
> + goto fail;
> + }
> + if (ts == 0) {
> + av_log(NULL, AV_LOG_DEBUG, "%%t but no ts, using 0"); // necessary for first frame on some streams
> + }
> + percentt_found = 1;
> + abs_ts = llabs(ts);
> + ms = abs_ts % AV_TIME_BASE;
> + abs_ts /= AV_TIME_BASE;
> + secs = abs_ts % 60;
> + abs_ts /= 60;
> + mins = abs_ts % 60;
> + abs_ts /= 60;
> + hours = abs_ts;
> + if (ts < 0)
> + snprintf(buf1, sizeof(buf1),
> + "-%02d.%02d.%02d.%03d", hours, mins, secs, ms);
> + else
> + snprintf(buf1, sizeof(buf1),
> + "%02d.%02d.%02d.%03d", hours, mins, secs, ms);
> + len = strlen(buf1);
> + if ((q - buf + len) > buf_size - 1) {
> + av_log(NULL, AV_LOG_ERROR, "%%t size overflow");
> + goto fail;
> + }
> + memcpy(q, buf1, len);
> + q += len;
> + break;
> default:
> goto fail;
> }
> @@ -4437,7 +4471,7 @@ addchar:
> *q++ = c;
> }
> }
> - if (!percentd_found)
> + if (!percentd_found && !percentt_found)
> goto fail;
> *q = '\0';
> return 0;
> @@ -4451,6 +4485,11 @@ int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
> return av_get_frame_filename2(buf, buf_size, path, number, 0);
> }
>
> +int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
> +{
> + return av_get_frame_filename3(buf, buf_size, path, number, flags, 0);
> +}
> +
> void av_url_split(char *proto, int proto_size,
> char *authorization, int authorization_size,
> char *hostname, int hostname_size,
> -- 2.9.3 (Apple Git-75)
>
>
>
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