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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On Mon, 2022-10-31 at 15:22 +0800, wenbin.chen-at-intel.com@ffmpeg.org wrote: > From: Wenbin Chen > > Add qsv_transcode example which shows how to use qsv to do hardware > accelerated transcoding, also show how to dynamically set encoding > parameters. > > examples: > Normal usage: > qsv_transcode input.mp4 h264_qsv output.mp4 "g 60" > > Dynamic setting usage: > qsv_transcode input.mp4 hevc_qsv output.mp4 "g 60 asyne_depth 1" > 100 "g 120" > This command initializes codec with gop_size 60 and change it to > 120 after 100 frames > > Signed-off-by: Wenbin Chen > --- > configure | 2 + > doc/examples/.gitignore | 1 + > doc/examples/Makefile | 1 + > doc/examples/qsv_transcode.c | 440 +++++++++++++++++++++++++++++++++++ > 4 files changed, 444 insertions(+) > create mode 100644 doc/examples/qsv_transcode.c > > diff --git a/configure b/configure > index 70c9e41dcc..a8b4496465 100755 > --- a/configure > +++ b/configure > @@ -1748,6 +1748,7 @@ EXAMPLE_LIST=" > transcoding_example > vaapi_encode_example > vaapi_transcode_example > + qsv_transcode_example > " > > EXTERNAL_AUTODETECT_LIBRARY_LIST=" > @@ -3811,6 +3812,7 @@ transcode_aac_example_deps="avcodec avformat swresample" > transcoding_example_deps="avfilter avcodec avformat avutil" > vaapi_encode_example_deps="avcodec avutil h264_vaapi_encoder" > vaapi_transcode_example_deps="avcodec avformat avutil h264_vaapi_encoder" > +qsv_transcode_example_deps="avcodec avformat avutil h264_qsv_encoder" > > # EXTRALIBS_LIST > cpu_init_extralibs="pthreads_extralibs" > diff --git a/doc/examples/.gitignore b/doc/examples/.gitignore > index 44960e1de7..d787afdd4c 100644 > --- a/doc/examples/.gitignore > +++ b/doc/examples/.gitignore > @@ -22,3 +22,4 @@ > /transcoding > /vaapi_encode > /vaapi_transcode > +/qsv_transcode > diff --git a/doc/examples/Makefile b/doc/examples/Makefile > index 81bfd34d5d..f937fbefda 100644 > --- a/doc/examples/Makefile > +++ b/doc/examples/Makefile > @@ -21,6 +21,7 @@ EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE) += > transcode_aac > EXAMPLES-$(CONFIG_TRANSCODING_EXAMPLE) += transcoding > EXAMPLES-$(CONFIG_VAAPI_ENCODE_EXAMPLE) += vaapi_encode > EXAMPLES-$(CONFIG_VAAPI_TRANSCODE_EXAMPLE) += vaapi_transcode > +EXAMPLES-$(CONFIG_QSV_TRANSCODE_EXAMPLE) += qsv_transcode > > EXAMPLES := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)$(EXESUF)) > EXAMPLES_G := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)_g$(EXESUF)) > diff --git a/doc/examples/qsv_transcode.c b/doc/examples/qsv_transcode.c > new file mode 100644 > index 0000000000..9b37bbea9f > --- /dev/null > +++ b/doc/examples/qsv_transcode.c > @@ -0,0 +1,440 @@ > +/* > + * Quick Sync Video (video transcoding) transcode sample > + * > + * Permission is hereby granted, free of charge, to any person obtaining a > copy > + * of this software and associated documentation files (the "Software"), to > deal > + * in the Software without restriction, including without limitation the > rights > + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell > + * copies of the Software, and to permit persons to whom the Software is > + * furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice shall be included in > + * all copies or substantial portions of the Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING > FROM, > + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN > + * THE SOFTWARE. > + */ > + > +/** > + * @file > + * Intel QSV-accelerated transcoding example. > + * > + * @example qsv_transcode.c > + * This example shows how to do QSV-accelerated transcoding and how to > + * dynamically change encoder's option. > + * Usage: qsv_transcode input_stream codec output_stream initial option > + * { frame_number new_option } > + * e.g: - qsv_transcode input.mp4 h264_qsv output_h264.mp4 "g 60" > + * - qsv_transcode input.mp4 hevc_qsv output_hevc.mp4 "g 60 async_depth > 1" > + * 100 "g 120" > + * (initialize codec with gop_size 60 and change it to 120 after 100 > + * frames) > + */ > + > +#include > +#include > + > +#include > +#include > +#include > +#include > + > +static AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; > +static AVBufferRef *hw_device_ctx = NULL; > +static AVCodecContext *decoder_ctx = NULL, *encoder_ctx = NULL; > +static int video_stream = -1; > + > +typedef struct DynamicSetting { > + int frame_number; > + char* optstr; > +} DynamicSetting; > +static DynamicSetting *dynamic_setting; > +static int setting_number; > +static int current_setting_number; > + > +static int str_to_dict(char* optstr, AVDictionary **opt) > +{ > + char *key, *value; > + if (strlen(optstr) == 0) > + return 0; > + key = strtok(optstr, " "); > + if (key == NULL) > + return AVERROR(ENAVAIL); > + value = strtok(NULL, " "); > + if (value == NULL) > + return AVERROR(ENAVAIL); > + av_dict_set(opt, key, value, 0); > + do { > + key = strtok(NULL, " "); > + if (key == NULL) > + return 0; > + value = strtok(NULL, " "); > + if (value == NULL) > + return AVERROR(ENAVAIL); > + av_dict_set(opt, key, value, 0); > + } while(key != NULL); > + return 0; > +} > + > +static int dynamic_set_parameter(AVCodecContext *avctx) > +{ > + AVDictionary *opts = NULL; > + int ret = 0; > + static int frame_number = 0; > + frame_number++; > + if (current_setting_number < setting_number && > + frame_number == dynamic_setting[current_setting_number].frame_number) > { > + AVDictionaryEntry *e = NULL; > + ret = str_to_dict(dynamic_setting[current_setting_number].optstr, > &opts); > + if (ret < 0) { > + fprintf(stderr, "The dynamic parameter is wrong\n"); > + goto fail; > + } > + /* Set common option. The dictionary will be freed and replaced > + * by a new one containing all options not found in common option > list. > + * Then this new dictionary is used to set private option. */ > + if ((ret = av_opt_set_dict(avctx, &opts)) < 0) > + goto fail; > + /* Set codec specific option */ > + if ((ret = av_opt_set_dict(avctx->priv_data, &opts)) < 0) > + goto fail; > + /* There is no "framerate" option in commom option list. Use "-r" to > set > + * framerate, which is compatible with ffmpeg commandline. The video > is > + * assumed to be average frame rate, so set time_base to 1/framerate. > */ > + e = av_dict_get(opts, "r", NULL, 0); > + if (e) { > + avctx->framerate = av_d2q(atof(e->value), INT_MAX); > + encoder_ctx->time_base = av_inv_q(encoder_ctx->framerate); > + } > + } > +fail: > + av_dict_free(&opts); > + return ret; > +} > + > +static int get_format(AVCodecContext *avctx, const enum AVPixelFormat > *pix_fmts) > +{ > + while (*pix_fmts != AV_PIX_FMT_NONE) { > + if (*pix_fmts == AV_PIX_FMT_QSV) { > + return AV_PIX_FMT_QSV; > + } > + > + pix_fmts++; > + } > + > + fprintf(stderr, "The QSV pixel format not offered in get_format()\n"); > + > + return AV_PIX_FMT_NONE; > +} > + > +static int open_input_file(char *filename) > +{ > + int ret; > + const AVCodec *decoder = NULL; > + AVStream *video = NULL; > + > + if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) { > + fprintf(stderr, "Cannot open input file '%s', Error code: %s\n", > + filename, av_err2str(ret)); > + return ret; > + } > + > + if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) { > + fprintf(stderr, "Cannot find input stream information. Error code: > %s\n", > + av_err2str(ret)); > + return ret; > + } > + > + ret = av_find_best_stream(ifmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); > + if (ret < 0) { > + fprintf(stderr, "Cannot find a video stream in the input file. " > + "Error code: %s\n", av_err2str(ret)); > + return ret; > + } > + video_stream = ret; > + video = ifmt_ctx->streams[video_stream]; > + > + switch(video->codecpar->codec_id) { > + case AV_CODEC_ID_H264: > + decoder = avcodec_find_decoder_by_name("h264_qsv"); > + break; > + case AV_CODEC_ID_HEVC: > + decoder = avcodec_find_decoder_by_name("hevc_qsv"); > + break; > + case AV_CODEC_ID_VP9: > + decoder = avcodec_find_decoder_by_name("vp9_qsv"); > + break; > + case AV_CODEC_ID_VP8: > + decoder = avcodec_find_decoder_by_name("vp8_qsv"); > + break; > + case AV_CODEC_ID_AV1: > + decoder = avcodec_find_decoder_by_name("av1_qsv"); > + break; > + case AV_CODEC_ID_MPEG2VIDEO: > + decoder = avcodec_find_decoder_by_name("mpeg2_qsv"); > + break; > + case AV_CODEC_ID_MJPEG: > + decoder = avcodec_find_decoder_by_name("mjpeg_qsv"); > + break; > + default: > + fprintf(stderr, "Codec is not supportted by qsv\n"); > + return AVERROR(ENAVAIL); > + } > + > + if (!(decoder_ctx = avcodec_alloc_context3(decoder))) > + return AVERROR(ENOMEM); > + > + if ((ret = avcodec_parameters_to_context(decoder_ctx, video->codecpar)) < > 0) { > + fprintf(stderr, "avcodec_parameters_to_context error. Error code: > %s\n", > + av_err2str(ret)); > + return ret; > + } > + decoder_ctx->framerate = av_guess_frame_rate(ifmt_ctx, video, NULL); > + > + decoder_ctx->hw_device_ctx = av_buffer_ref(hw_device_ctx); > + if (!decoder_ctx->hw_device_ctx) { > + fprintf(stderr, "A hardware device reference create failed.\n"); > + return AVERROR(ENOMEM); > + } > + decoder_ctx->get_format = get_format; > + decoder_ctx->pkt_timebase = video->time_base; > + if ((ret = avcodec_open2(decoder_ctx, decoder, NULL)) < 0) > + fprintf(stderr, "Failed to open codec for decoding. Error code: > %s\n", > + av_err2str(ret)); > + > + return ret; > +} > + > +static int encode_write(AVPacket *enc_pkt, AVFrame *frame) > +{ > + int ret = 0; > + > + av_packet_unref(enc_pkt); > + > + if((ret = dynamic_set_parameter(encoder_ctx)) < 0) { > + fprintf(stderr, "Failed to set dynamic parameter. Error code: %s\n", > + av_err2str(ret)); > + goto end; > + } > + > + if ((ret = avcodec_send_frame(encoder_ctx, frame)) < 0) { > + fprintf(stderr, "Error during encoding. Error code: %s\n", > av_err2str(ret)); > + goto end; > + } > + while (1) { > + if (ret = avcodec_receive_packet(encoder_ctx, enc_pkt)) > + break; > + enc_pkt->stream_index = 0; > + av_packet_rescale_ts(enc_pkt, encoder_ctx->time_base, > + ofmt_ctx->streams[0]->time_base); > + if ((ret = av_interleaved_write_frame(ofmt_ctx, enc_pkt)) < 0) { > + fprintf(stderr, "Error during writing data to output file. " > + "Error code: %s\n", av_err2str(ret)); > + return ret; > + } > + } > + > +end: > + if (ret == AVERROR_EOF) > + return 0; > + ret = ((ret == AVERROR(EAGAIN)) ? 0:-1); > + return ret; > +} > + > +static int dec_enc(AVPacket *pkt, const AVCodec *enc_codec, char *optstr) > +{ > + AVFrame *frame; > + int ret = 0; > + > + ret = avcodec_send_packet(decoder_ctx, pkt); > + if (ret < 0) { > + fprintf(stderr, "Error during decoding. Error code: %s\n", > av_err2str(ret)); > + return ret; > + } > + > + while (ret >= 0) { > + if (!(frame = av_frame_alloc())) > + return AVERROR(ENOMEM); > + > + ret = avcodec_receive_frame(decoder_ctx, frame); > + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) { > + av_frame_free(&frame); > + return 0; > + } else if (ret < 0) { > + fprintf(stderr, "Error while decoding. Error code: %s\n", > av_err2str(ret)); > + goto fail; > + } > + if (!encoder_ctx->hw_frames_ctx) { > + AVDictionaryEntry *e = NULL; > + AVDictionary *opts = NULL; > + AVStream *ost; > + /* we need to ref hw_frames_ctx of decoder to initialize > encoder's codec. > + Only after we get a decoded frame, can we obtain its > hw_frames_ctx */ > + encoder_ctx->hw_frames_ctx = av_buffer_ref(decoder_ctx- > >hw_frames_ctx); > + if (!encoder_ctx->hw_frames_ctx) { > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + /* set AVCodecContext Parameters for encoder, here we keep them > stay > + * the same as decoder. > + */ > + encoder_ctx->time_base = av_inv_q(decoder_ctx->framerate); > + encoder_ctx->pix_fmt = AV_PIX_FMT_QSV; > + encoder_ctx->width = decoder_ctx->width; > + encoder_ctx->height = decoder_ctx->height; > + if ((ret = str_to_dict(optstr, &opts)) < 0) { > + fprintf(stderr, "Failed to set encoding parameter.\n"); > + goto fail; > + } > + /* There is no "framerate" option in commom option list. Use "-r" > to > + * set framerate, which is compatible with ffmpeg commandline. The > + * video is assumed to be average frame rate, so set time_base to > + * 1/framerate. */ > + e = av_dict_get(opts, "r", NULL, 0); > + if (e) { > + encoder_ctx->framerate = av_d2q(atof(e->value), INT_MAX); > + encoder_ctx->time_base = av_inv_q(encoder_ctx->framerate); > + } > + if ((ret = avcodec_open2(encoder_ctx, enc_codec, &opts)) < 0) { > + fprintf(stderr, "Failed to open encode codec. Error code: > %s\n", > + av_err2str(ret)); > + av_dict_free(&opts); > + goto fail; > + } > + av_dict_free(&opts); > + > + if (!(ost = avformat_new_stream(ofmt_ctx, enc_codec))) { > + fprintf(stderr, "Failed to allocate stream for output > format.\n"); > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + > + ost->time_base = encoder_ctx->time_base; > + ret = avcodec_parameters_from_context(ost->codecpar, > encoder_ctx); > + if (ret < 0) { > + fprintf(stderr, "Failed to copy the stream parameters. " > + "Error code: %s\n", av_err2str(ret)); > + goto fail; > + } > + > + /* write the stream header */ > + if ((ret = avformat_write_header(ofmt_ctx, NULL)) < 0) { > + fprintf(stderr, "Error while writing stream header. " > + "Error code: %s\n", av_err2str(ret)); > + goto fail; > + } > + } > + frame->pts = av_rescale_q(frame->pts, decoder_ctx->pkt_timebase, > + encoder_ctx->time_base); > + if ((ret = encode_write(pkt, frame)) < 0) > + fprintf(stderr, "Error during encoding and writing.\n"); > + > +fail: > + av_frame_free(&frame); > + if (ret < 0) > + return ret; > + } > + return 0; > +} > + > +int main(int argc, char **argv) > +{ > + const AVCodec *enc_codec; > + int ret = 0; > + AVPacket *dec_pkt; > + > + if (argc < 5 || (argc - 5) % 2) { > + av_log(NULL, AV_LOG_ERROR, "Usage: %s file>" > + " <\"encoding option set 0\"> [ <\"encoding > options set 1\">]...\n", argv[0]); > + return 1; > + } > + setting_number = (argc - 5) / 2; > + dynamic_setting = av_malloc(setting_number * sizeof(*dynamic_setting)); > + current_setting_number = 0; > + for (int i = 0; i < setting_number; i++) { > + dynamic_setting[i].frame_number = atoi(argv[i*2 + 5]); > + dynamic_setting[i].optstr = argv[i*2 + 6]; > + } > + > + ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV, NULL, > NULL, 0); > + if (ret < 0) { > + fprintf(stderr, "Failed to create a QSV device. Error code: %s\n", > av_err2str(ret)); > + goto end; > + } > + > + dec_pkt = av_packet_alloc(); > + if (!dec_pkt) { > + fprintf(stderr, "Failed to allocate decode packet\n"); > + goto end; > + } > + > + if ((ret = open_input_file(argv[1])) < 0) > + goto end; > + > + if (!(enc_codec = avcodec_find_encoder_by_name(argv[2]))) { > + fprintf(stderr, "Could not find encoder '%s'\n", argv[2]); > + ret = -1; > + goto end; > + } > + > + if ((ret = (avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, > argv[3]))) < 0) { > + fprintf(stderr, "Failed to deduce output format from file extension. > Error code: " > + "%s\n", av_err2str(ret)); > + goto end; > + } > + > + if (!(encoder_ctx = avcodec_alloc_context3(enc_codec))) { > + ret = AVERROR(ENOMEM); > + goto end; > + } > + > + ret = avio_open(&ofmt_ctx->pb, argv[3], AVIO_FLAG_WRITE); > + if (ret < 0) { > + fprintf(stderr, "Cannot open output file. " > + "Error code: %s\n", av_err2str(ret)); > + goto end; > + } > + > + /* read all packets and only transcoding video */ > + while (ret >= 0) { > + if ((ret = av_read_frame(ifmt_ctx, dec_pkt)) < 0) > + break; > + > + if (video_stream == dec_pkt->stream_index) > + ret = dec_enc(dec_pkt, enc_codec, argv[4]); > + > + av_packet_unref(dec_pkt); > + } > + > + /* flush decoder */ > + av_packet_unref(dec_pkt); > + if ((ret = dec_enc(dec_pkt, enc_codec, argv[4])) < 0) { > + fprintf(stderr, "Failed to flush decoder %s\n", av_err2str(ret)); > + goto end; > + } > + > + /* flush encoder */ > + if ((ret = encode_write(dec_pkt, NULL)) < 0) { > + fprintf(stderr, "Failed to flush encoder %s\n", av_err2str(ret)); > + goto end; > + } > + > + /* write the trailer for output stream */ > + if ((ret = av_write_trailer(ofmt_ctx)) < 0) > + fprintf(stderr, "Failed to write trailer %s\n", av_err2str(ret)); > + > +end: > + avformat_close_input(&ifmt_ctx); > + avformat_close_input(&ofmt_ctx); > + avcodec_free_context(&decoder_ctx); > + avcodec_free_context(&encoder_ctx); > + av_buffer_unref(&hw_device_ctx); > + av_packet_free(&dec_pkt); > + av_freep(&dynamic_setting); > + return ret; > +} LGTM. Is there any comment for this example? I'll merge it if no comment / objection. Thanks Haihao _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".